Heise PTE-1 User manual

PTE-1
HAND HELD
CALIBRATOR
OPERATING
MANUAL
REVISION 4.6 3/2004
I&M002-10052-11/00 (HHHC-MAN) 1P6/00 7P10/07 250 AMR

Thank you for your purchase. Please feel free to contact us if we may be of
assistance in any way.
Should you require service for this instrument or wish to take advantage of our
expert factory recalibration services, please complete the material return form
which can be printed directly from the “service” button on the Heise website.
Please return the instrument to:
Ashcroft Inc.
250 East Main Street
Stratford, CT 06614-5145
Tel: [phone]
Fax: [phone]
For the latest return form and product
information, please visit our website at:
www.heise.com

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Revision 4.6 3/2004
Table of Contents
Section Description Page
1.0 Introduction
.................................................................................................................................
4
1.3 Base Unit Overview
........................................................................................................
4
1.4 Quick Select Module Overview
.....................................................................................
4
1.4.1 The GQS-1 Quick Select Pressure Module
................................................................
5
1.4.2 The GQS-2 Quick Select Pressure Module .
..............................................................
5
1.4.3 The GQS-RT1 Quick Select RTD Temperature Interface Module
.............................
5
1.4.4 The GQS-TC1 Quick Select Thermocouple Interface Module
..................................
6
2.0 Unpacking
....
6
2.1 Unpacking Product Upon Receipt
...................................................................................
2.1 Unpacking Product Upon Receipt ...................................................................................2.1 Unpacking Product Upon Receipt
6
2.2 Product Storage
...............................................................................................................
6
2.3 Product Cleaning
............................................................................................................
6
3.0 System Start-Up General Instructions
......................................................................................
6
3.1 Battery Installation
..........................................................................................................
6
3.2 Installation of Quick Select Modules
..............................................................................
7
3.3 Starting Up HHC System
................................................................................................
7
3.4 Optional System Start Up Procedures
.............................................................................
8
3.4.1 Auto Off – Battery Save Function
..............................................................................
8
3.4.2 Set Up for Battery Charge Level Indication
...............................................................
9
3.4.3 Low Battery Icon
........................................................................................................
10
3.4.4 Programming Date and Time Information
.................................................................
10
3.4.5 Input of Owner/Operator Information
........................................................................
11
3.5 Removing Quick Select Modules
....................................................................................
12
4.0 Key Function Overview
...............................................................................................................
12
5.0 Port Select Function
...................................................................................................................
13
6.0 Zero Function
..............................................................................................................................
14
6.1 Zeroing One of Two Installed Quick Select Pressure Module
........................................
14
7.0 Displaying Current & Voltage Measurements
...........................................................................
14
8.0 Engineering Unit Selection
.........................................................................................................
15
8.1 Selecting a Factory Programmed Engineering Unit
........................................................
8.1 Selecting a Factory Programmed Engineering Unit ........................................................8.1 Selecting a Factory Programmed Engineering Unit
15
8.2 Setting Up a Custom (User Defi ned) Engineering Unit
..................................................
8.2 Setting Up a Custom (User Defi ned) Engineering Unit ..................................................8.2 Setting Up a Custom (User Defi ned) Engineering Unit
15
8.3 Using a Custom (User Defi ned) Engineering Unit
..........................................................
8.3 Using a Custom (User Defi ned) Engineering Unit ..........................................................8.3 Using a Custom (User Defi ned) Engineering Unit
16
8.4 Display of Two Different Engineering Units, for Two Installed Modules
......................
17
8.5 Temperature Selection for H2O Conversion Factor
........................................................
8.5 Temperature Selection for H2O Conversion Factor ........................................................8.5 Temperature Selection for H2O Conversion Factor
18
9.0 Tare Function
...............................................................................................................................
19
10.0 Hold Function
..............................................................................................................................
19
10.1 Using the Hold Function
.................................................................................................
19
11.0 Minimum and Maximum Value Tracking
....................................................................................
20

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Revision 4.6 3/2004
Section Description Page
12.0 Damping Function
.......................................................................................................................
20
12.1 Set Up of Damping Function
..........................................................................................
20
12.2 Activating or Discontinuing Damping
............................................................................
21
13.0 Percent Function
.........................................................................................................................
21
13.1 Set Up of Percent Function
.............................................................................................
21
13.2 Use of Percent Function
..................................................................................................
22
14.0 Flow Velocity and Flow Volume Measurement Background
....................................................
23
14.1 Set Up for Flow Velocity & Volume Measurement
.........................................................
14.1 Set Up for Flow Velocity & Volume Measurement ......................................................... 14.1 Set Up for Flow Velocity & Volume Measurement
23
14.2 Flow Velocity Measurement
............................................................................................
14.2 Flow Velocity Measurement ............................................................................................ 14.2 Flow Velocity Measurement
23
14.3 Engineering Unit Selection for Flow Velocity
................................................................
24
14.4 Flow Volume Measurement
.............................................................................................
14.4 Flow Volume Measurement ............................................................................................. 14.4 Flow Volume Measurement
24
14.5 Engineering Unit Selection for Flow Volume
.................................................................
25
14.6 Simultaneous Display of Two Flow Measurements in Independent Engineering Units
.
25
14.7 Simultaneous Display of Flow (Velocity or Volume) with a Pressure Measurement
......
14.7 Simultaneous Display of Flow (Velocity or Volume) with a Pressure Measurement ...... 14.7 Simultaneous Display of Flow (Velocity or Volume) with a Pressure Measurement
26
14.8 Simultaneous Display of Flow (Velocity or Volume) with a Temperature Measurement
27
14.9 Simultaneous Display of Flow Volume and Flow Velocity
.............................................
27
14.10 Simultaneous Display of Flow (Velocity or Volume) and
An Electrical Output Measurement
............................................................................
An Electrical Output Measurement ............................................................................ An Electrical Output Measurement
28
15.0 Leak Detection Function
............................................................................................................
29
15.1 Leak Rate Function Set Up
.............................................................................................
29
15.2 Pressure Decay Function Set Up
.....................................................................................
30
15.3 Sensor Selection for Performing Leak Rate or Pressure Decay Tests
.............................
30
15.4 Performing Leak Rate or Pressure Decay Tests
..............................................................
30
16.0 Temperature Measurement Using RTD Probes
........................................................................
16.1 Setting Up the Calibrator for Temperature Measurement with an RTD Probe
...............
31
16.2 Calibrating and Programming of the RTD Interface and Probe
......................................
33
17.0 Temperature Measurement with Thermocouple Detector
.......................................................
33
17.1 Setting Up Calibrator for Use with Thermocouple Detector
..........................................
17.1 Setting Up Calibrator for Use with Thermocouple Detector .......................................... 17.1 Setting Up Calibrator for Use with Thermocouple Detector
34
18.0 Pressure and Temperature Switch Testing
...............................................................................
35
18.1 Setting Up for Pressure and Temperature Switch Testing
...............................................
35
18.2 Trip Point Testing
............................................................................................................
35
18.3 Deadband Testing
............................................................................................................
36
19.0 RS232 Interface
...........................................................................................................................
37
19.1 Confi guring RS232 Interface for Use With Dumb Terminal
...........................................
37
19.2 RS232 Confi guration Options
.........................................................................................
37
19.2.1 RS232 – ISO1745 Mode Functional Overview
..........................................................
37
19.2.2 RS232 – Journal Mode Functional Overview
............................................................
37
19.2.3 RS232 – Inquiry Mode Functional Overview
............................................................
38
19.3 RS232 Set Up for Journal Mode Operation
....................................................................
38
19.4 RS232 Set Up for Inquiry Mode Operation
....................................................................
39
20.0 Status
....
41
20.1 Reviewing Instrument Status
...........................................................................................
41
20.2 Battery Check Function
...................................................................................................
41

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Revision 4.6 3/2004
Section Description Page
21.0 Dual Module Functions
...............................................................................................................
42
21.1 Accuracy of Dual Module Measurements
.......................................................................
42
21.2 Setting Up Dual Module Differential Pressure Measurement
.........................................
21.2 Setting Up Dual Module Differential Pressure Measurement ......................................... 21.2 Setting Up Dual Module Differential Pressure Measurement
42
21.3 Setting Up a Dual Module Summation Pressure Measurement
......................................
21.3 Setting Up a Dual Module Summation Pressure Measurement ...................................... 21.3 Setting Up a Dual Module Summation Pressure Measurement
44
22.0 Data Logging Function (Optional)
............................................................................................
45
22.1 Sequential Data Logging Function (Optional)
................................................................
45
22.2 Setting Up the Data Logging Function (Optional)
..........................................................
45
22.3 Labeling Function – Standard Data Logging Mode
........................................................
46
22.4 Automatic Data Logging – Standard Data Logging Mode
.............................................
46
22.5
Manual Data Logging – Standard Data Logging Mode
..................................................
47
22.6 Review of Stored Data – On Instrument Display –
Standard Data Logging Mode
....................................................................................
48
22.7 Erasing of Selected Stored Data –
Standard Data Logging Mode
..................................
49
22.8 Erasing All Stored Data –
Standard Data Logging Mode
...............................................
49
23.0 Certifi cation Generation Enhanced Data Logging Mode
.......................................................
50
23.1 Set Up and Use of Certifi cation Generation Data Logging Mode
...............................
50
24.0 HHC System Set Up for Uploading Stored Data
Into an IBM Compatible PC
....................................................................................................
55
24.1 Installing and Operating Upload Software
......................................................................
56
24.2 Battery Back Up Replacement
........................................................................................
24.2 Battery Back Up Replacement ........................................................................................ 24.2 Battery Back Up Replacement
56
25.0 Event Timer Function
................................................................................................................
56
25.1 Event Timer Set Up
.........................................................................................................
57
25.2 Data Logging Set Up for Operation with the Event Timer
.............................................
25.2 Data Logging Set Up for Operation with the Event Timer ............................................. 25.2 Data Logging Set Up for Operation with the Event Timer
57
26.0
Alarm Function – Overview (Optional Feature)
......................................................................
58
26.1 Alarm Set Up
...................................................................................................................
59
27.0 Recertifi cation of the Calibrator
...............................................................................................
60
27.1 Calibration/Recertifi cation Overview
..............................................................................
60
27.2 Required Equipment
........................................................................................................
27.2 Required Equipment ........................................................................................................ 27.2 Required Equipment
60
27.3 As Received Readings of the Base Unit Electronics
.......................................................
60
27.4 Adjustment/Calibration Base Unit Electronics
...............................................................
62
27.5 Recertifi cation of Quick Select Pressure Modules
..........................................................
64
— APPENDICES —
Appendix A – Pressure Conversion Factors
.....................................................................................................
67
Appendix B – ASCII Character Set
.....................................................................................................................
69
Appendix C – Product Specifi cations
................................................................................................................
72
Table I
.................................
74
Table II
.................................
74
Appendix D – RTD Probe Connector
.................................................................................................................
75
Appendix E – Certifi cation of the TC1 Thermocouple Interface Module
.........................................................
76

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Revision 4.6 3/2004
Section 1.0 Introduction
Congratulations! Your purchase of the Hand Held Cali-
brator (HHC) calibration system equips you to perform a
wide variety of pressure and temperature measurements.
The general pressure and temperature measurement
capabilities of the HHC are supplemented by application
specifi c fi rmware as well as the availability of optional
data logging capability.
The HHC is a complete pressure calibration system
providing: interchangeable pressure ranges, simultane-
ous measurement and display of two pressure ranges,
measurement and display of current and voltage. The
HHC also provides the ability to perform high accuracy
temperature measurement. Conversion between tempera-
ture and pressure measurement can be done in a matter
of seconds and requires no tools.
A standard HHC system consists of a base unit that
acts as a host for one or two Quick Select modules.
The Quick Select pressure modules are interchange-
able and are available in a wide variety of ranges from
0.25 inches of water to 10000 psi. A brief description
of the main components of an HHC system follows. In
addition, Quick Select modules are available to allow
the base unit to work in conjunction with most standard
RTD temperature probes and thermocouple temperature
detectors.
Section 3 and its various subsections include all the
information needed to begin using the HHC system for
basic pressure and temperature measurement. Higher
level functions are detailed in later sections of this
manual. It is strongly recommended that the pertinent
sections of this manual be reviewed prior to using the
HHC system for higher level and application specifi c
measurement and test activities.
Important
: Failure to follow the instructions provided in
this manual may result in personal injury and/or damage
to the instrument, accessories, products under test or
other equipment.
Section 1.3 Base Unit Overview HHC
The base unit functions as the host for the Quick Select
pressure and temperature modules designated in this
manual by the “GQS” prefi x. Each base unit includes
a keypad, microprocessor based electronics and a two
line LCD display. The base unit displays the measure-
ment data transmitted from the Quick Select module(s).
Measurement outputs from two installed Quick Select
modules can be simultaneously displayed. Quick
Select modules for the measurement of either pres-
sure or temperature can be plugged into either of the
2 module “bays” in the base unit. Pressure engineering
units can be independently selected from the library of
twelve factory programmed or one operator designated
engineering unit. Temperature measurement data can
be displayed in degrees Celsius, Fahrenheit, Kelvin or
Rankine. In addition, when used with the GQS-RT1
Quick Select module for temperature measurement with
an RTD temperature probe, the calibrator system can
display the RTD measurement in ohms. The GQS-TC1
thermocouple interface module allows measurement of
mV inputs from –10 to +100 mV.
In addition to displaying two pressure measurements
simultaneously the operator can elect to display pressure
and temperature or the measured value from either of
the two installed Quick Select modules as well as either
a voltage or mA measurement. This allows for the easy
calibration and test of pressure and temperature trans-
ducers, transmitters and switches.
The base unit includes a wide variety of general and
application specifi c measurement capabilities. These
capabilities allow the HHC measurement and calibration
system to be used for basic pressure and temperature
measurement as well as application specifi c pressure
measurement activities. Basic pressure and tempera-
ture measurement capabilities include; max/min recall,
operator programmable tare values, display hold, opera-
tor programmable damping and user selected engineer-
ing units. Application specifi c capabilities include; fl ow
velocity measurement, fl ow volume mea-surement, leak
detection, leak rate quantifi cation and switch testing.
Optional data logging, time delayed data logging and
programmable alarms are also available.
Section 1.4 Quick Select Modules
Overview
The Quick Select pressure module is a calibrated pres-
sure measurement device. Quick Select pressure module
units are available in a wide variety of pressure measure-
ment ranges. The Quick Select RTD and therm-ocouple
interface modules allow the HHC base unit to provide
precision temperature measurement data using standard
RTD (Resistance Temperature Detector) or thermocou-
ple detectors. The GQS-RT1 module allows the HHC to
function with most common platinum, nickel and copper
RTDs, while the GQS-TC1 supports most common
thermocouples.
The Quick Select module communicates with the base
unit via a 10 pin connector. Quick Select pressure mod-
ules slide into the base unit automatically aligning the
female 10 pin connector on the Quick Select pressure
module with the male 10 pin connector in the base unit.
All calibration data is stored in Electrically Erasable
Programmable Read Only Memory (EEPROM) resident

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Revision 4.6 3/2004
in the Quick Select module. As such, any Quick Select
module can be used in any base unit and the measure-
ment system will provide measurement accuracy in
conformance with the published specifi cation.
Section 1.4.1 The GQS-1 Quick Select
Pressure Module
GQS-1 Quick Select pressure modules provide special-
ized low pressure measurement capabilities. GQS-1
Quick Select pressure modules incorporate a micro-
machined silicon variable capacitance sensor.
Inside the sensor there is a micro-machined silicon
diaphragm. This diaphragm is between two non-moving
plates on which metal has been sputtered. The air
between the diaphragm and the non-moving plates acts
as an insulator.
As pressure or vacuum is applied to the sensor, the
diaphragm moves changing the distance between the
diaphragm and the fi xed plates. This change in distance
changes the capacitance of the sensor. It is this variable
capacitance that is measured and correlated to pressure
or vacuum during the calibration process.
The sensor is connected to an Application Specifi c
Integrated Circuit (ASIC). This ASIC generates a linear
signal ramp and applies this signal to the top plate of the
sensor while an equal and opposite signal is applied to
the bottom plate.
When the measured pressure is balanced, for example,
when both ports are opened to atmosphere, the distance
between the diaphragm and both of the fi xed plates is the
same. When this is the case, the signal to the top plate
is capacitively coupled to the equal and opposite signal
applied to the bottom plate. As a result, no signal current
will fl ow through the center plate (diaphragm). When
the diaphragm is moved off center by the application of
pressure or vacuum, the excess current fl ows through
the center plate to an input differentiator in the ASIC.
The differentiator translates the frequency of the sensor
output into a voltage which is scaled over the full scale
range of the instrument.
GQS-1 modules are available in ranges from 0.25 inches
of water through 200 inches of water. These modules
can be confi gured to provide differential/gauge or
compound pressure measurement capabilities. They
are designed for use on clean, dry, noncorrosive and
nonconductive gases. A complete listing of the available
GQS-1 modules is provided in Appendix C.
Section 1.4.2 The GQS-2 Quick Select
Pressure Module
The GQS-2 Quick Select pressure module incorporates a
micro-machined piezoresistive strain gauge sensor. This
technology takes advantage of the fact that, when put
under stress, (as with the fl exing of a diaphragm under
pressure or vacuum) the resistive properties of a piece of
silicon will change. In the manufacturing process resis-
tors are deposited in a silicon substrate. The resistors
are typically confi gured in a wheatstone bridge orienta-
tion. When positioned in this fashion, the output will be
near zero when no pressure (stress) is applied and will
increase in a near linear fashion with the application of
pressure or vacuum. The reverse side of the substrate is
etched to provide the required diaphragm thickness for
the given pressure range.
When power is applied to the sensor the level of
resistance across the wheatstone bridge will change in
proportion to the level of pressure applied. The output
from the sensor is extremely repeatable and has mini-
mal hysteresis due to the fact that the sensor substrate is
silicon. The sensor output is then amplifi ed by circuitry
within the Quick Select pressure module. The amplifi ed
output is then calibrated over the operating range of the
module. Calibration coeffi cients for the module are stored
in Electrically Erasable Programmable Read Only Memory
(EEPROM) within the Quick Select pressure module.
GQS-2 modules are available in ranges from 5 through
10,000 psi. These modules can be confi gured to provide
gauge, compound or absolute pressure measurement,
as well as vacuum measurement capabilities. GQS-2
modules in range of 5 psi are designed for use on clean,
dry, noncorrosive and nonconductive gases. 316 stainless
steel sensor isolation is provided for ranges from 0/10
through 0/10,000 psi. A complete listing of the available
GQS-2 modules is provided in Appendix C.
Section 1.4.3 The GQS-RT Quick Select
RTD Interface Module
The GQS-RT1 allows the HHC base unit, when used
with RTD temperature probes, to provide precision
temperature measurement data. The GQS-RT1 plugs
directly into the Quick Select interface module bay in
the base unit. Any standard RTD probe with a Switch-
craft TA4M can be plugged into the Switchcraft TA4F
connector on the module. The GQS-RT1 module comes
factory programmed with the curves for Pt 100 (385 &
392), Cu 10 and Ni 120 RTD probes. It supports RTDs
with outputs in the range of 0/400 ohms. The GQS-RT2
is supplied factory programmed to support the Pt1000
( 385 & 392) RTD. This interface module will support
RTDs through an output up to 4000 ohms. The GQS-RT
module can be programmed with coeffi cients for other
RTD probes of interest and specifi c characteristics of a
probe already included in the on-board library can be

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Revision 4.6 3/2004
Section 3.0 System Start-Up General
Instructions
The HHC can perform a wide variety of simple and
complex temperature and pressure based measurement,
test and calibration operations. Due to the menu driven
set up procedures the system can be quickly and easily
confi gured for most any of its measurement functions.
By following the steps in this section you can be ready
to use your HHC to perform basic pressure and tempera-
ture measurement functions in a matter of minutes.
Section 3.1 Battery Installation
Step 1
To gain access to the battery compartment,
remove the bottom end of the strap assembly by
detaching the Velcro connection and pulling the bottom
end of the strap from the retaining pin in the bottom of
the case of the base unit.
Step 2
Open the battery compartment by sliding the
battery enclosure cover out of the compartment opening.
To do this press down on the circular, ribbed indentation
on the battery cover while pushing the enclosure cover
outward with pressure on the two standoffs located near
the pin used to retain the strap on the base unit.
Step 3
Note the polarity information for installation of
the two 9 volt alkaline batteries as outlined on the inside
of the battery enclosure.
Step 4
Locate the two 9 volt batteries and the foam
retaining spacer provided in a small plastic bag. Install
these batteries as shown on the diagram in the battery
enclosure. The HHC will operate for approximately 30
hours on the two 9 Vdc batteries. Alkaline batteries are
recommended for use in the HHC system.
Step 5
Insert the retaining spacer between the two 9
volt batteries. This will insure that the batteries will not
disconnect or be shaken loose during normal operation.
Step 6
Replace battery compartment cover by sliding
cover back into position until it locks in place.
Step 7
Replace strap by threading strap through the
programmed into the GQS-RT unit to provide enhanced
accuracy. Each GQS-RT interface module can accom-
modate up to 8 different programmed RTD calibration
curves. Programming of the RT module is accomplished
via an optional software package and any PC compat-
ible computer with an available standard serial com-
munication port. See Appendix E page 75 for probe
connector pin out information.
Section 1.4.4 The GQS-TC1 Quick Select
Thermocouple Interface Module
The GQS-TC1 allows the HHC base unit, when used
with a thermocouple interface module, to perform
temperature measurement. The GQS-TC1 plugs directly
into the Quick Select module bay in the base unit. The
thermocouple is then attactched to the GQS-TC1 module
via a male “miniature thermocouple connector.”
Section 2.0 Unpacking & General Care
General instructions for unpacking and calibrator care
follow.
Section 2.1 Unpacking Product Upon Receipt
Prior to removing the HHC from the packaging material
inspect all cartons for shipping damage. Document any
damage evident in the event that a damage claim must
be made against the shipper. After inspection, remove
the base unit, module(s), manual and any accessories
purchased from the packaging material. Retain the
packaging for use in returning the HHC to the factory
for future recertifi cation or repair.
Section 2.2 Product Storage
The product should be stored in an area that is main-
tained in the temperature range indicated in the storage
temperature in the product specifi cation. The storage
temperature limits are -4 to + 158 degrees Fahrenheit.
Storage of product in environments that will exceed
these temperature limits results in signifi cant risk of
product damage. It is recommended that the product
not be left in closed cars or truck cabs as temperature
damage can easily occur due to the “greenhouse effect”
of closed vehicles or extreme cold temperatures that can
result from winter conditions.
Section 2.3 Product Cleaning
The enclosure of the calibrator is not watertight. As
such, care should be taken during cleaning to assure
liquid does not penetrate the enclosure for the base unit
or Quick Select modules. Cleaning of the product should
be done with a cloth moistened with a warm, mild deter-
gent mixture.

- 9 -
Revision 4.6 3/2004
opening, starting closest to the battery compartment and
reattaching Velcro. The strap may be adjusted in this
fashion to provide for proper strap length to accommo-
date any hand size.
Section 3.2 Installation of Quick Select Module
in a Vacant Module Bay
Caution:
Quick Select modules should be installed with
the power off on the base unit. Failure to turn the base
unit off prior to changing pressure measurement mod-
ules could damage the instrument or module electron-
ics or “lock up” microprocessor operation. If power is
inadvertently left on and the base unit locks up (looses
communication) after changing Quick Select modules,
simply power down the unit and restart.
Refer to Section 3.5 for the procedure to remove a Quick
Select module.
To insert a Quick Select module follow the process
below.
Step 1
Make certain the power is off on the base unit.
Step 2
Hold the base unit, in one hand, with the keypad
side down.
Step 3
Holding the Quick Select module to be installed
in the other hand, align the module with the locking tab
up, with the module bay on the base unit.
Step 4
Slide the Quick Select module into the base unit
until the retaining/release tab pops into the square cutout
in the module bay of the base unit. This will lock the
Quick Select module into the base unit.
Step 5
Installation of the Quick Select module is now
complete. If an GQS-RT1 or GQS-TC1 interface module
is to be used plug the appropriate temperature detector
into the connector on the module. To set up the HHC
and temperature module combination proceed to section
16 for RTDs or section 17 for thermcouple detectors
Important Note:
If only one module is to be used, install the Quick
Select System Protection module provided. Follow
the same procedure to install the system protection
module as that used for a standard pressure
measurement module. Both module bays of the
base unit should contain a Quick Select module
to protect from dirt or other debris getting into
the base unit assembly. If only one Quick Select
pressure module is needed install the System
Protection Module (part number GQS-XS) supplied
with your unit at the time of shipment when using
the HHC system.
Section 3.3 Starting-Up the HHC System
After the desired Quick Select pressure module(s) or
Quick Select temperature measurement interface module
and probe has been installed the HHC can be started up
as follows:
Turn the system power on by pressing the on/off key on
the instrument’s key pad.
ON
OFF
During the start up process the HHC will display the fol-
lowing information:
First Screen
fi rmware
version xx.xx
where xx.xx is a numerical value representing the
fi rmware revision level installed in the base unit. The
fi rmware version is updated/changed as enhancements
are added to the HHC.
Second Screen
Left Mod: Std or enh
temperature performance
Third Screen
Range
xx and engineering unit
where:
xx = the range of the installed module
ngineering unit is the default engineering unit
for the module installed in the left bay
Fourth Screen
Right Mod: Std or enh
temperature performance
Fifth Screen
Range
xx and engineering unit

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Revision 4.6 3/2004
where:
xx = the range of the installed module engineering unit
is the default engineering unit for the module installed in
the left bay
Note: GQS-2 pressure measurement modules are avail-
able with a standard calibration or an optional enhanced
temperature performance calibration. Modules calibrated
to provide enhanced temperature performance will pro-
vide the rated accuracy, without any additional tempera-
ture error over an operating temperature range of 20-120
degrees Fahrenheit. These modules will display:
enh
temperature performance
when powered up.
The range indication is provided in the primary engi-
neering unit for each installed Quick Select module.
Upon initial power up an HHC used with an GQS-RT1
temperature module and probe will default to display-
ing the ohms (resistance value) for the probe. Once set
up this combination will default to the previously used
temperature measurement unit, such as Celsius, Fahren-
heit, Kelvin or Rankine. The primary engineering unit
for a given Quick Select pressure module, along with
the measurement range, is included on the module label.
The information on the left side of the display corre-
sponds with the Quick Select module installed in the left
module bay and information on right side of the display
corresponds with the Quick Select module installed in
the right module bay. If only one module is installed
the corresponding side of the display will indicate “no
module” on power up.
After the third screen the HHC will commence provid-
ing pressure measurement data. The format for display
of the measurement data is as follows:
Eng Unit Eng Unit
(primary engineering unit)
+xx.xxx +xx.xxx
(measured value with sign)
When only one module is installed, the side of the dis-
play corresponding to the side of the base unit that does
not have a module will display “- - - - -”
If necessary, the HHC, used with a Quick Select pres-
sure module, may be zeroed by pressing the Zero key
prior to beginning measurement activities. Additional
details on zeroing the HHC system are provided in Sec-
tion 6.0 of this manual.
The HHC is now ready for basic pressure or temperature
measurement. Simply connect the pressure port(s) of the
Quick Select pressure module(s) to be used to the pres-
sure source to be measured. If a gauge pressure mea-
surement is to be made using a differential Quick Select
pressure module be sure to connect the pressure to be
measured to the high pressure port on the Quick Select
pressure module. For temperature measurement, connect
the RTD probe to be used to the Switchcraft connec-
tor on the interface module and proceed to Section 16
and 17 for instructions on setting up the calibrator for
temperature measurement.
Section 3.4 Optional System Start Up
Procedures
There are additional set up operations that can be per-
formed to increase the overall capabilities of the HHC
system; these include:
1 – Auto off function to protect from inadvertently leav-
ing the HHC system on.
2 – Setting up battery level indication so that an estimate
of the remaining battery life can be viewed at the push
of a button.
3 – Programming the current date and time for use in
date stamping data logged pressure values and starting
delayed data logging activities on HHC systems with the
optional data logging capability.
Current date and time
information is only maintained in units with the data
logging option
4- Programming owner/operator information for display
on the HHC to facilitate tracking of in-house instrumen-
tation.
The following subsections provide information on the
above listed start up procedures.
Section 3.4.1 Auto Off- Battery Save Function
(BatFunc)
The HHC can be set up to automatically turn itself off
if no keypad activity is detected for a 10 minute time
period. This capability will protect the two 9 volt batter-
ies from being depleted if the HHC is left on inadver-
tently.
The following procedure is used to activate or disable
the battery save function.
Step 1
With the HHC on and reading pressure press the
SET UP key.
SET
UP
Step 2
Using the arrow keys select the battery func-
tion submenu (designated BatFunc in the set up menu).
When selected, the text “BatFunc” will fl ash on the
display.

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Revision 4.6 3/2004
BatFunc PerCent
UserEng H2Oref
Step 3
With “BatFunc” fl ashing press the enter key.
ENT
Step 4
Using the up/down arrow keys to select Auto
Shut off. When selected the text will fl ash.
Auto shut off
CfgBattIndicator
Step 5
With the words “Auto shut off” fl ashing press
enter to activate the battery save function.
ENT
The PTE will respond by displaying the following:
Auto Shut off
Disable Enable
If Enable is selected the HHC will automatically turn
off if there is no keypad activity detected for a period of
10 minutes. If Disable is selected the HHC will remain
on continuously until the battery voltage is no longer
suffi cient to power the system. The battery save mode
selected is stored in Electrically Erasable Programmable
Read Only Memory (EEPROM). As such it does not
require reprogramming on power up.
Note: An optional AC adapter is available for long term
continuous measurement activities.
Section 3.4.2 Set Up for Battery Charge Level
Indication
If this function is not set up pressing the BAT CK key
will provide a measurement of the remaining voltage
of the installed batteries.
If the battery check function is set up, the HHC can
provide an estimate of the remaining battery life. This
estimate is expressed as a percentage of the expected
30 hour life of newly installed alkaline batteries. Use
of non-alkaline, lithium or rechargeable batteries will
render the life expectancy estimate inaccurate.
This
function should be set up only when new batteries
are installed.
If this function is not set up pressing the BATCK key
will provide the measured remaining voltage of the
installed batteries.
To have the capability to check the estimated remaining
battery life follow the steps below.
Step 1
Press the ON/OFF key on the keypad to turn
the power on to the base unit.
ON
OFF
Step 2
With the HHC on and reading pressure press the
battery check key, designated BAT CK.
SET
UP
Step 3
Using the arrow keys select the battery save
function (designated BatFunc in the set up menu). When
selected, the text “BatFunc” will fl ash on the display.
BatFunc PerCent
UserEng H2Oref
Step 4
With the “BatFunc” text fl ashing press the enter
key.
ENT
Step 5
Using the up/down arrow keys to select CfgBat-
tIndicator to set battery level. When selected the text will
fl ash.
Auto shut off
CfgBattIndicator
In response the HHC will display:
Battery Indicator
Disable Enable
Step 6
To Enable the battery level indictor use the
arrow keys to select the text Enable
Step 7
With the text Enable fl ashing, press the enter
key.
ENT
The HHC will respond by displaying:
Set BattCapacity
XXXXXX
where:
XXXXXXXXXXXXXXXXX is a bar graph represen-
tation of the remaining battery life and +X.XXV repre-
sents the voltage level of the installed batteries.
Step 8
After installation of new batteries use the right
pointing arrow key to index the bar graph to 100%.
>
Step 9
After the bar graph has been refreshed press the
enter key.
ENT
Note:
The bar graph and the estimate of the percent bat-
tery life remaining will now be displayed along with the

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Revision 4.6 3/2004
battery voltage level when the BATCHK key is pressed.
Section 3.4.3 Low Battery Icon
The HHC provides advanced warning of a low battery
condition. The icon, which looks like a miniature battery
will appear and fl ash in the center of the top line of the
display when the measured battery voltage drops to 5.7
Vdc. The calibrator will continue to function properly
with the low battery icon fl ashing. To ensure uninter-
rupted measurement capability it is recommended that
the batteries be replaced as soon as possible after the low
battery icon appears. When the measured voltage drops
to 5.5 Vdc, the low battery icon will fl ash on the display
and the calibrator will turn itself off after 15 seconds. If
the measured voltage drops to 5.4 Vdc the calibrator will
not allow power up.
Summary of low battery warnings:
5.7 Vdc: Low battery icon appears
5.5 Vdc: Low battery icon remains on display,
unit powers down after 15 seconds.
5.4 Vdc: Power up not allowed
It is estimated that the user will have between 45 and 60
minutes of battery life remaining when the low battery
icon initially appears. Actual battery life remaining will
vary based on tasks being performed and ambient oper-
ating temperature.
Section 3.4.4 Programming Date & Time
Information
If the unit does not have the Data Logging option skip
this section. The date/time function supports date/time
recording capability that can be used in association with
the Data Log option.
Note: HHC units without the Data Logging option have
no requirement for the date time tracking and will not
keep track of the date and time when powered down.
For various application oriented functions the use of a
real time clock will be required. Setting the real time
clock is a simple process and should be done when the
HHC is received.
The real time clock may be set by following the steps
below.
Step 1
With the HHC on and reading pressure press the
SET UP key.
SET
UP
Step 2
Using arrow keys move through the menu
selections and select “DateTime” on the LCD display.
DateTime will fl ash on the display when selected.
Owner Alarm
DateTime RS232
Step 3
With the words “DateTime” fl ashing press the
enter key.
ENT
This will activate the date time setup screen that looks as
follows:
YYMMDDHHMMSS
XXXXXXXXXXXX
where:
YY = the last 2 digits of the current year
MM = the month (01 for Jan. through 12 for Dec.)
DD = the day of the month
(01-31 depending on day and month)
HH = the current hour using military time where:
0800 = 8:00 AM
1200 = noon
1500 = 3 PM
2000 = 8 PM
MM = minutes (from 0 to 60)
SS = seconds (from 0 to 60)
Setting the current date and time is accomplished by
using the keys with the corresponding numerical values.
From left to right enter the appropriate number in each
of the fi eld positions using the numeral keys. Once a
given fi eld has the appropriate number entered the HHC
will automatically index to the next position for entry.
When completed the date/time information should look
as follows:
YYMMDDHHMMSS
961003111500
For a date/time of October(10), 3
rd
day (03), 1996 (96) at
a time of 11:15 AM (1115), and 0 seconds (00).
When the correct time/date information has been entered
and appears on the display press the enter key to store
the time/date information in memory.
ENT
Time/date information is stored in battery backed up
Random Access Memory (RAM). This information
should only need to be changed or reentered when a time
change has occurred, the HHC is to be used in a dif-
ferent time zone than the one in which it was in during

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Revision 4.6 3/2004
initial setup or when the lithium battery used to back up
the RAM needs replacement (every 1-2 years depending
on the environmental conditions under which the HHC
is used). RAM memory is only supplied if unit is pur-
chased with data logging option. Time/date information
is not maintained in HHC units without data log option.
Section 3.4.5 Input of Owner/Operator Information
The HHC has the ability to display, on power up, the
name of the individual, department or company respon-
sible for its use or maintenance.
The following steps are to be followed to input user
(owner) data.
Step 1
With the HHC on and reading pressure press the
Set Up key, designated SET UP.
SET
UP
Step 2
Using the arrow keys, select the Owner function
from the setup menu. When selected the word “Owner”
will fl ash on the display.
Owner Alarm
DateTime RS232
Step 3
With the word “Owner” fl ashing press the
enter key.
ENT
Step 4
After pressing ENT the display will read:
Access code?
000000
Step 5
A fi ve digit owner access code was provided
with your instrument at the time of shipment. Use the
number keys on the HHC to enter the Owner Access
Code from left to right.
Access code?
123456
Note:
Two passwords were provided with your HHC.
One password provides access to the owner program-
ming fi eld and the other provides access to the calibra-
tion data and recertifi cation programming. Please be
certain to select the correct password. These passwords
are not interchangeable.
If, at any time during the entry process you enter a
number in error, press the CE key to clear the entry and
restart the access code entry process.
If the password codes have been lost, contact your
calibrator supplier. The serial number of the base unit
is required for the factory to provide product password
information.
Step 6
With the proper access code displayed press the
enter key.
ENT
If an incorrect access code is entered the HHC will
respond:
Access denied
To restart the entry process after the “access denied”
response re-enter the owner set up function through the
setup menu.
Step 7
After entry of the proper access code the display
will read:
Enter owner name
xxxxxxxxxxxxxxx
To enter a new owner name use the up and down arrows
to scroll through the alphanumeric entries and the left
and right arrows to move the active entry fi eld (cursor)
to the next location.
A blank can be inserted by using the down arrow with
the letter A fl ashing on the display. Continuing to press
the down arrow after the blank appears will provide
access to numerical values starting at 9 and decreasing
to 0. The label may contain alphabetical, numerical or a
combination of both types of entries.
To review:
Up/down arrows provide access as follows:
0, 1, 2, 3, 4, 5,
6, 7, 8, 9, _, A,
B, C, D, E, F, G,
H, I, J, K, L, M,
N, O, P, Q, R, S,
T, U, V, W, X, Y, Z
By maintaining pressure on the up/down arrow the dis-
played number or letter will continue to change until the
last character has been reached.
By pressing and releasing the up/down arrow a single
step from letter or number can be accomplished.
The left/right arrow keys allow for entry of alpha
numeric data in any of the available positions.
Step 8
After the desired operator information has been
keyed the display will look as follows:
Enter owner name
JOHN Q OPERATOR
Step 9
After the desired owner/user information has

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Revision 4.6 3/2004
been entered and is displayed press the enter key.
ENT
The HHC will respond:
JOHN Q OPERATOR
Ent=OK CE=Cancel
Step 10
To store the owner/user information displayed
press the ENT key. Pressing the CE key will return the
HHC to the pressure measurement mode. If entry of new
owner information is still required restart the process as
outlined in steps 1-9 above.
Owner information is stored in Electrically Erasable
Programmable Read Only Memory (EEPROM). This
information should only need to be changed or re-
entered when the owner/user changes.
Section 3.5 Removing Quick Select Pressure or
Temperature Modules
Changing Quick Select pressure modules, therefore
changing the measurement ranges in use, is quick and
easy. Simply follow the steps below to change Quick
Select pressure modules.
Step 1
Using the on/off key on the keypad of the base
unit turn the power to the base unit off.
ON
OFF
Step 2
With one hand, hold base unit keypad side down
and press down on the square retaining tab located near
the upper strap pin on the bottom of the base unit.
Step 3
Maintain pressure on the retaining tab and with
your other hand fi rmly grasp the pressure manifold
that extends from the end of the Quick Select pressure
module and slide the module out of the module bay.
Important Note:
Both module bays of the base unit
should contain a pressure module to protect from dirt or
other debris getting into the base unit assembly. If only
one Quick Select pressure module is needed install the
System Protection Module (part number 875X114-01)
supplied with your unit at the time of shipment.
Section 4.0 Key Function Overview
The HHC has a great deal of functionality. Many of the
product capabilities are activated by dedicated keys on
the keypad. Other functions are either activated or set up
through a set up menu activated by pressing the set up
key. A brief overview of the function of each key follows
Key
Designation Function
On/Off
Turn unit on and off.
Set Up
Provides access to set up functions for
various on-board fi rmware functions/
capabilities
.
PORT SEL
Used to select displayed measure-ment
data. Selection includes: reading pres-
sure from either one or both installed
sensors as well as selection of reading
pressure and electrical measurements
simultaneously. (See Section 5.0 for
details.)
ZERO
Provides ability to zero, either one or
both, Quick Select Modules. (See Sec-
tion 6.0 for details.)
BAT CK
Provides graphical representation
of remaining battery power levels.
(SeeSection 3.4.2 for details.)
*ENG UNIT
Used to select desired engineering unit
from the following: psi, inHg, inWC,
ftSW, Bar, mBar, kPa, Mpa, mmHg,
cmWC, mmWC, kg/cm, user. Where
“user” is an operator programmable
engineering unit, allowing the display
of any single engineering unit not
included in the above list. (See Section
8.0 for details.)
MIN/MAX
Displays the minimum and maximum
pressure values measured. (See Sec-
tion 11.0 for details.)
TARE
Allows for subtraction of an operator
selected value from the displayed pres-
sure measurement value for one or two
Quick Select pressure modules. (See
Section 9.0 for details.)
FLOW
Provides ability to measure the fl ow of
a gas in terms of velocity or volume.
(See Section 14.0 for details.)
*LEAK
Allows testing for leaks in terms
of pressure decay over time or in
terms of leak rate.
(See Section 15.0
for details.)
DATA LOG
Provides set up capability for manual
or (OPTIONAL)automated data log-
ging. (SeeSection
Key

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Revision 4.6 3/2004
Designation Function
DATA STORE
Provides ability to store measured
pressure or temperature values. (See
Section 22.0 for details.)
HOLD
Freezes the displayed pressure and
electrical measurements. (See Section
10.0 for details.)
^ Moves cursor up.
*TRIP
Provides access to pressure
DETECT
switch testing fi rmware. (See Section
18.0 for details.)
<
Moves cursor to the left.
*DAMP
Activates or disables dampused to
smooth displayed pressure measure-
ment data from the effects of low
level pressure transients. (See Section
12.0 for details.)
>
Moves cursor to the right.
CE
Clears previous entry.
mA/V
Changes electronic measurement
display from mA to V or V to mA and
can also be used to deactivate either
side of the display. (See Section 7.0
for details.)
v
Moves cursor down.
*%
Converts display from pressure units to
% of f.s. (See Section 13.0 for details.)
ENT
Enters input data.
Notes on key functions:
* These functions require data input through activation
of appropriate input fi elds in the setup menu. Examples
of required input data include:
For
Damping:
Level of damping desired.
For
Engineering Unit Selection:
Water reference tem-
perature or user (non library) engineering unit entry can
be selected.
For
Leak:
Type of measurement (leak rate vs pressure
decay), time to monitor and for leak rate applications the
volume of the vessel to be monitored.
For
% Readout:
Input zero and span, output zero and
span and device type (I/P, P/I, P/P, P/E).
The required data is input through the set up functions
provided by the corresponding menu options accessed
and available by pressing the setup key.
Complete details of each of the above outlined capabili-
ties is included in the section referenced after the func-
tion summary provided above.
Section 5.0 Port Select Function
The Port Select Key, designated PORT SEL, provides
the ability to select either of the two installed Quick
Select modules for display, both modules for display or
either a pressure/temperature module on one side and a
current or voltage measurement on the other side of the
display. For example, if the HHC has two pressure mod-
ules installed and is reading in psi the standard display
for dual pressure readout would be:
psi psi
+123456 +123456
Pressing the Port Select key once will result in the fol-
lowing display change:
psi mA
+123456 +1.234
Pressing the Port Select key a second time will result in
the following display change:
mA psi
+1.234 +123456
Pressing the Port Select key a third time will result in the
display returning to a dual pressure readout mode. As
seen below:
psi psi
+123456 +123456
If the HHC has a temperature measurement interface
module installed the same type of sequence would be
followed. For example, if the HHC had an RTD interface
module installed in the left module bay the following
sequence would be observed as a result of pressing the
PORT SEL key:
o
F psi
+72.35 +123456
Pressing the Port Select key once will result in the fol-
lowing display change:
o
F mA
+72.35 +1.234
Pressing the Port Select key a second time will result in
the following display change:
mA psi
+1.234 +123456
Pressing the Port Select key a third time will result in

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Revision 4.6 3/2004
the display returning to a readout mode featuring the
measurement data from both of the installed modules.
As seen below:
o
F psi
+72.35 +123456
See 8.4 for display of pressure in two different engineer-
ing units.
See Section 7.0 for display of current and voltage mea-
surement data.
Section 6.0 Zero Function
This section applies to pressure measurement only. The
zero function does not apply to the function of tempera-
ture measurement. The tare capability will function in
conjunction with temperature measurement modules.
This allows for the subtracting of a displayed or operator
entered temperature value from the displayed tempera-
ture measurement data. See Section 9.0 for information
on the tare function.
Pressing the zero key when two Quick Select pressure mod-
ules are installed and displayed will simultaneously zero
both pressure modules. In addition, each module can be
zeroed independently, as outlined in the following section.
It is recommended that the instrument be zeroed prior to
use or calibration.
Section 6.1 Zeroing One of Two Installed Quick
Select Pressure Modules
If zeroing one of two installed modules is desired the
following process should be followed:
In this example we will assume that the left pressure
module is to be zeroed and the right pressure module is
to be unchanged.
Step 1
Press the port select the number of times
required (one or two) to deactivate the display of pres-
sure on the side that you wish not to re-zero.
PORT
SEL
When set up in accordance with the requirements of this
example the HHC will have the following
information on the display:
psi mA
+12345 +1234
Step 2
With the pressure display deactivated for the
side that is not to be zeroed press the zero key.
ZERO
The HHC will respond by displaying:
psi mA
+00000 +1234
Step 3
To resume the display of pressure measurement
data, for the pressure module not zeroed, press the port
select key the required number of times (one or two) to
restore the dual pressure display.
When complete the HHC will display:
psi psi
+00000 +12345
Normal pressure measurement activity can now be
resumed.
Section 7.0 Displaying Current and Voltage
Measurements
As outlined in the previous section the port select (PRT
SEL) key is used to select the information seen on the
display.
The display confi gurations available are:
Left Side of Display Right Side of Display
pres/temp pres/temp
pres/temp electrical measurement
electrical measurement pres/temp
The pressure/temperature value on the display cor-
responds with the measured value of the Quick Select
module installed in the module bay on the corresponding
side of the calibrator.
To read a current or voltage follow the steps below.
Step 1
With the HHC on and reading pressure/
temperature set the display as outlined in Section 5.0 to
display the pressure measurement of the desired module.
Step 2
With the pressure measurement, for the desired
module, displayed on one side and the electronic
measurement on the other press the mA/V key until the
desired electrical measurement parameter appears. For
example, with a pressure module installed in the left
module bay, pressing the mA/V key will produce the
following results:
First display when electronic measurement is initiated
through the port select function:
psi mA
+123456 +1.234
Result from pressing mA/V key fi rst time:
psi ------
+123456

- 17 -
Revision 4.6 3/2004
Result from pressing mA/V key a second time:
psi volts
+123456 +1.234
Result from pressing mA/V key a third time:
psi mA
+123456 +1.234
Using the combination of the port select function and the
mA/V function any combination of electrical measure-
ments and pressure measurements can be produced.
Section 8.0 Engineering Unit Selection-Pressure
Measurement
The HHC is factory programmed to provide pressure
measurement in 12 engineering units. These include; psi,
inches of mercury, inches of water, feet of sea water, bar,
mbar, kilopascal, megapascal, millimeters of mercury,
centimeters of water, millimeters of water and killograms
per square centimeter.
Pressure measurement data may also be displayed in a
user programmable non-library engineering unit. Section
8.2 Programming a Custom (User) Defi ned Engineering
Unit provides complete details on setting up an operator
defi ned engineering unit.
Inch, centimeter and millimeter of water engineering
units may be set up for conversion at temperatures of
4 degrees and 20 degrees C or 60 degrees F. Consult
Section 8.5 H
2
O Reference Temperature Selection to pro-
gram the desired temperature for inches or centimeters of
water conversions.
Section 8.1 Selecting a Factory Programmed
Engineering Unit
To select an engineering unit from the on-board library
follow the steps below:
Step 1
With the HHC on and displaying pressure mea-
surement data press the engineering unit key. This key is
designated ENG UNIT.
ENG
UNIT
The HHC will respond by displaying the engineering unit
library as follows:
fi rst screen:
psi inHg inWC ftSW
Bar mBar kPa mPa
second screen:
mm Hgcm WCmm WCkgcm
user
The engineering unit abbreviations correspond to the
following engineering units:
psi: pounds per square inch
inHg: inches of mercury
inH2O: inches of water column*
ftSW: feet of sea water
Bar: bar
mBar: millibar
kpa: kiloPascals
mPa: megaPascals
mmHg: millimeters of mercury
cmWC: centimeters of water column*
mmWC: millimeters of water column*
kgcm: kilograms per square centimeter
user: user programmable engineering unit
(see Section 8.2 for details)
*Conversion factor is programmable for temperature.
Consult Section 8.5 for details.
Step 2
Using the left/right and up/down arrow keys
select the desired engineering unit. When selected, the
text for the desired engineering unit will fl ash.
psi inHg,inWCftSW
Bar mBar kPa mPa
In the above example mBar is the selected unit.
Step 3
With the desired engineering unit fl ashing press
the enter key.
ENT
The calibrator will respond by displaying the pressure
measurement(s) in the newly selected engineering unit.
If two Quick Select pressure modules are installed the
output of both will be displayed in the selected engi-
neering unit. The HHC can also display the measure-
ment data of two installed Quick Select pressure
modules in independent engineering units. Section 8.4
provides the set up procedures for dual sensor dual
engineering unit operation.
Section 8.2 Setting up a Custom or User
Defi ned Engineering Unit
The HHC has a user programmable engineering unit
available. This allows for the display of pressure mea-
surement data in an engineering unit that is not in the
library of the HHC. Any unit of pressure measurement
that is linearly proportional to pressure change can be
programmed for use in the user engineering unit fi eld.
For this example, the pressure measurement unit of
mSW (meters of sea water) will be used as the desired
user engineering unit. To set the user engineering unit
to provide pressure measurement data in mSW follow

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Revision 4.6 3/2004
the steps below.
Step 1
With the HHC on and reading pressure press the
key designated SET UP.
SET
UP
Step 2
Using the arrow keys select the User engi-
neering unit option displayed as “UserEng”. The text
“UserEng” will fl ash when selected.
BatFunc PerCent
UserEng H2Oref
Step 3
With the text “User Eng” fl ashing press the
enter key.
ENT
Step 4
After pressing the enter key the HHC will
respond by displaying:
Conv from psi
.000000
Step 5
Enter the conversion factor required to convert
from psi to the engineering unit desired. For conversion
from psi to mSW the conversion factor is 0.684482.
Enter 6 digits to provide the required resolution to sup-
port the accuracy of the HHC. A complete list of conver-
sion factors is provided in Appendix A.
Use the number keys to enter the desired conversion
factor, entering the required factor from left to right. For
our example of mSW the conversion factor is 0.684482
and the display should read:
Conv from psi
0.684482
If an incorrect conversion factor is entered press the
clear entry key, designated CE, to re-initiate the entry
process for the correct factor.
Step 6
When the correct numerical value appears on
the display press the enter key.
ENT
After entering the conversion factor the HHC will
respond by displaying:
Enter unit’s name
_ _ _ _ _ _
Step 7
Enter the name of the engineering unit selected,
abbreviated to 6 characters or less. For our example
mSW is a 3 character abbreviation for meters of sea
water. This abbreviation will fi t in the 6 digit fi eld. To
enter the mSW engineering unit label use the up and
down arrow keys to increment or decrement through the
alphabet/numerical values and the left and right arrows
to move the active entry fi eld (cursor) to the next loca-
tion.
If needed for the desired engineering unit, a blank can be
inserted by using the down arrow with the letter A fl ash-
ing on the display. Continuing to press the down arrow
after the blank appears will provide access to numerical
values starting at 9 and decreasing to 0. The label may
contain alphabetical, numerical or both types of entries.
To review:
Up/down arrows provide access as follows:
0, 1, 2, 3, 4, 5,
6, 7, 8, 9, _, A,
B, C, D, E, F, G,
H, I, J, K, L, M,
N, O, P, Q, R, S,
T, U, V, W, X, Y, Z
By maintaining pressure on the up/down arrow the
display number or letter will continue to change until the
last character has been reached.
By pressing and releasing the up/down arrow a single
increment or decrement between letters or numbers can
be accomplished.
The left/right and up/down arrow keys allow for entry of
letters or numbers in any of the available label positions.
Step 8
For this example, after the engineering unit
label has been keyed the display will read:
Enter unit’s name
mSW
Step 9
With the desired engineering unit label dis-
played press the enter key.
ENT
After the enter key has been pressed the HHC will
resume normal pressure measurement in the original
engineering units. Instructions on how to use the custom
engineering units are provided in the following section.
Section 8.3 Using A Custom Engineering Unit
After a custom engineering unit has been programmed it
may be used by following the steps below. For informa-
tion on programming a custom engineering unit refer
to Section 8.2 Setting up a Custom or User Defi ned
Engineering Unit.
To display pressure measurement data in the user engi-
neering unit:

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Step 1
With the HHC on and measuring pressure press
the engineering unit key. Designated ENG UNIT on the
keypad.
ENG
UNIT
The HHC will respond by displaying:
fi rst screen:
psi inHg inWC ftSW
Bar mBar kPa mPa
second screen
mm Hgcm WCmm WCkgcm
user
Step 2
Using the left/right and up/down arrow keys
select the word “user”. When selected the word “user”
will fl ash.
mm Hgcm WCmm WCkgcm
user
Step 3
With the word “user” fl ashing press the enter
key.
ENT
The HHC will respond by displaying pressure measure-
ment data in the following display format:
u_mSW u_mSW
xxxxxx xxxxxx
where:
u_ indicates that the engineering unit in use is a user
defi ned unit with a label of mSW
xxxxxx represents the current pressure measurement(s)
in the user engineering unit.
See Section 8.4 Display of Two Engineering Units for
information on how to simultaneously display the mea-
sured values from two Quick Select pressure modules in
different engineering units.
Section 8.4 Display of Two Engineering Units
The HHC can display pressure measurement data from
two installed Quick Select pressure modules in indepen-
dent engineering units. To display two different engi-
neering units simultaneously the following procedure
should be followed.
Step 1
With the HHC on and displaying pressure mea-
surement data from two Quick Select pressure modules
press the engineering unit key, designated ENG UNIT
on the keypad.
ENG
UNIT
Step 2
Using the arrow keys select either of the two
desired engineering units. For this example we will
select psi as one of the desired units.
With psi selected the text “psi” will fl ash on the display
and the display will look as follows:
psi inHg inWC ftSW
Bar mBar kPa mPa
Step 3
Press the enter key to select psi.
ENT
The HHC will respond by returning to the pressure mea-
surement mode and will display the measurement data
for both Quick Select pressure modules in psi, as follows:
psi psi
+12345 +12345
Step 4
Next, press the port select to deactivate the dis-
play of pressure measurement data on the side that you
wish to maintain pressure measurement in terms of psi.
A pressure display is deactivated when the correspond-
ing side of the display contains milliamp (mA) data,
Voltage (V) data or is blank “ ------ ”.
See Section 5.0 for details on the port select function.
In this case we will assume that the right side will
remain in psi and our goal is to present the measurement
data from the left Quick Select pressure module in bar.
Pressing the port select one time will deactivate the left
pressure display converting it to a mA measurement
fi eld. Pressing the port select a second time will deacti-
vate the right side, converting it to a mA measurement
fi eld and returning the left side of the display to the
function of pressure measurement.
Since we want the right side to remain psi we will deac-
tivate it in the psi mode by pressing the port select key
once.
PORT
SEL
The HHC will respond with the following display:
psi mA
+12345 +1234
Step 5
With the right side deactivated from pressure
measurement activities press the engineering unit key,
designated ENG UNIT on the keypad.
ENG
UNIT

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The HHC will respond by displaying:
psi inHg inWC ftSW
Bar mBar kPa mPa
Using the arrow keys select the desired engineering unit
for the left side. In this example we have opted for the
engineering unit of Bar. With the Bar engineering unit
selected the display will look as follows with the text
“Bar” fl ashing:
psi inHg inWCf tSW
Bar mBar kPa mPa
Step 6
With the desired engineering unit selected
(fl ashing) press the enter key.
ENT
The HHC will respond by displaying the following:
Bar mA
+12345 +1234
Step 7
Reactivate the right side of the display for pres-
sure measurement by pressing the Port Select key, as
required.
First press of the port select key.
PORT
SEL
HHC will respond by displaying the following:
mA psi
+1234 +12345
Second press of the
PORT
SEL
HHC will respond by displaying the following:
Bar psi
+12345 +12345
Using this process, any engineering unit may be selected
for display of the right or left Quick Select pressure
module measurement data.
Section 8.5 Temperature Selection for H2O
Conversion Factor
The HHC includes a library of 12 factory programmed
engineering units. This selection includes the engineer-
ing units inH2O, mmH2O and cmH2O. The pressure
generated by a column of water will vary with the tem-
perature of the water.
Over the years, several temperatures have evolved into
industry standards. These are the conversion factors
most commonly used by manufacturers of pressure
instruments when calibrating pressure measurement
devices in terms of the height of a column of water. To
facilitate your calibration and test of these instruments,
the HHC includes 3 conversion factors for each of the
water column based pressure engineering units. The
conversion factors are for the temperatures of 4 and 20
degrees Celsius and 60 degrees Fahrenheit. The factory
default setting is 20 degrees C.
The selection of the desired temperature for use in the
conversion of water based pressure measurements can be
accomplished by following these steps.
Step 1
With the HHC on and reading pressure press the
SET UP key.
SET
UP
Step 2
Using the up/down and left/right arrow keys
select the H2O reference option displayed as “H2Oref”
in the set up menu. When selected the text “H2Oref”
will fl ash on the display.
BatFunc PerCent
UserEng H2Oref
Step 3
With the text “H2Oref” fl ashing press the
enter key.
ENT
The HHC will respond by displaying:
H2O ref temp
20C 60F 4C
Step 4
Using the left/right arrow keys select the
desired temperature for the conversion factor. The
selected value will fl ash on the display.
H2O ref temp
20C 60F 4C
In the above example the conversion factor for water at
60 degrees Fahrenheit was selected.
Step 5
With the desired temperature for the conversion
factor fl ashing press the enter key.
ENT
The selected conversion temperature will be activated
and will be stored in Electrically Erasable Program-
mable Read Only Memory (EEPROM). It will not have
to be reentered on power-up unless a change in the refer-
ence temperature is desired.
After pressing the enter key the HHC will resume basic
pressure measurement.