Ametek JOFRA HPC400 User manual

...because calibration is
a matter of confidence
Reference Manual
Handheld Pressure Calibrator
JOFRA HPC400
©Copyright 2009 AMETEK Denmark A/S

HPC400
Reference Manual
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.1 Contacting AMETEK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.2 Standard Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.3 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2. Calibrator Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.1 Calibrator Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.2 Using the Backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.3 Using the Zero Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.4 Menu Controlled Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
3. Measuring Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3.1 Media Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4. Measuring Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
5. Measuring Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
6. Performing a Pressure Switch Test . . . . . . . . . . . . . . . . . . . . . . . . .19
7. Calibrating Transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
7.1 Using the mA Input Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
7.2 Calibrating a Pressure-to-Current Transmitter . . . . . . . . . . . . . . . . . . . .22
8. Minimum and Maximum Storage Capability . . . . . . . . . . . . . . . . . .23
9. Factory Setups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
10. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
11. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
11.1 Replacing Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
11.2 Cleaning the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
11.3 Service Center Calibration or Repair . . . . . . . . . . . . . . . . . . . . . . . . .28

1. Introduction
The JOFRA HPC400 is an accurate, full function pressure calibrator. The
calibrator includes the following features and functions:
• Large graphical LCD display. Intuitive menu system for easy operation of the
large number of useful and handy functions and features.
• Switch test functionality uses a high speed pressure update rate for superior
performance and repeatability.
• Current measurement, with or without 24 volt loop power.
• Voltage measurement capability.
• The JOFRA HPC400 is well suited for various applications including
calibration of gauges, pressure switches, safety valves, and P/I transmitters.
• The HPC400 is available in three pressure ranges, 2, 7 or 20 bar compound.
Please see pressure range/accuracy table for further details (Page 28).
• Vacuum is supported in all pressure ranges
Read this manual carefully before using the instrument and make
sure that all safety instructions and warnings are observed.
1.1 Contacting AMETEK/JOFRA
US, Canada, Latin America AMETEK M&CT 1-800-527-9999
Europe, Africa, Middle East AMETEK Denmark A/S + 45 4816 8000
Asia AMETEK Singapore Pte. Ltd.
At + 65 (64) 842 388
1.2 Standard Equipment
Inspect the unit carefully upon receipt. Save packing carton in case reshipment
is necessary. If there appears to be any damage, equipment missing or if there
are any questions about the unit, contact AMETEK.
Check to see if your calibrator is complete. It should include:
• HPC400 Calibrator • Reference Manual
• Test Leads • Pressure Fittings
• Calibration Certificate
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1.3 Safety information
Symbols Used
The following table lists the International Electrical Symbols. Some or all of
these symbols may be used on the instrument or in this manual.
Symbol Description
AC (Alternating Current)
AC-DC
Battery
CE Complies with European Union Directives
DC
Double Insulated
Electric Shock
Fuse
PE Ground
Hot Surface (Burn Hazard)
Read the User’s Manual (Important Information)
Off
On
Canadian Standards Association

The following definitions apply to the terms “Warning” and “Caution”.
• “Warning” identifies conditions and actions that may pose hazards to the
user.
• “Caution” identifies conditions and actions that may damage the
instrument being used.
Use the calibrator only as specified in this manual, otherwise injury and
damage to the calibrator may occur.
Warning
To avoid possible electric shock or personal injury:
• Do not apply more than the rated voltage. See specifications for supported
ranges.
• Follow all equipment safety procedures.
• Never touch the probe to a voltage source when the test leads are
plugged into the current terminals.
• Do not use the calibrator if it is damaged. Before you use the calibrator,
inspect the case. Look for cracks or missing plastic. Pay particular
attention to the insulation surrounding the connectors.
• Select the proper function and range for your measurement.
• Make sure the battery cover is closed and latched before you operate the
calibrator.
• Remove test leads from the calibrator before you open the battery door.
• Inspect the test leads for damaged insulation or exposed metal. Check
test leads continuity. Replace damaged test leads before you use the
calibrator.
• When using the probes, keep your fingers away from the probe contacts.
Keep your fingers behind the finger guards on the probes.
• Connect the common test lead before you connect the live test lead.
When you disconnect test leads, disconnect the live test lead first.
• Do not use the calibrator if it operates abnormally. Protection may be
impaired. When in doubt, have the calibrator serviced.
• Do not operate the calibrator around explosive gas, vapor, or dust.
• When measuring pressure, make sure the process pressure line is shut off
and depressurized before you connect it or disconnect it from the
calibrator.
• Disconnect test leads before changing to another measure or source
function.
• When servicing the calibrator, use only specified replacement parts.
3
!

• To avoid false readings, which could lead to possible electric shock or
personal injury, replace the battery as soon as the battery indicator
appears
Caution
To avoid possible damage to calibrator or to equipment under test:
• Use the proper jacks, function, and range for your measurement
application.
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2. Calibrator Interface
Figure 1 shows the location of the input and output connections on the
calibrator, while Table 1 describes their use.
Table 1: Input and Output Terminals
No. Name Description
1, 2 Input Terminals These terminals are used to measure
current, voltage and a contact closure for
switch test.
3 P1 Pressure Port This is the connection for the internal sensor
[P1]
Figure 2 shows the location of the keys on the calibrator. Table 2 lists the
functions of each key.
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Figure 1. Input/Output Terminals

Table 2. Key Functions
No. Name Function
1 Function Keys These keys are used in various ways,
primarily to configure the calibrator
2 ON/OFF Key This key is used to turn the calibrator on
and off
3 ZERO Key This key is used to zero pressure
measurements
4 Backlight Key This key is used to turn the backlight on
and off
5 Cursor Keys This key is for setting user inputed values
Note: When the calibrator is turned on by pressing the ON/OFF key, it will go
through a short startup self-check routine. During that routine, the display
shows the current firmware revision level, auto shutdown status and the ranges
of the internal pressure sensors. The calibrator requires a maximum of 5 min-
utes warm-up to rated accuracy. Large changes in ambient temperature may
require a longer warm-up period. See section 2.3 for instructions on zeroing the
pressure sensor displays. Pressure ranges should be zeroed each time the cali-
brator is started.
6
Figure 2. Keypad

2.1 Calibrator Display
The Calibrator Display consists of two regions: The menu bar (No. 5 on
Figure 3, located along the bottom of the screen) is used to access a menu
system. The main display (No. 1 on Figure 3) consists of up to three process
measurement sub-regions. These sub-regions will henceforth be referred to
as the UPPER, MIDDLE and LOWER displays. Figure 3 shows the location of
the different display fields while table 3 describes them.
Figure 3. Display
Table 3: Display Functions
No. Name Description
1 Primary Parameters Indicates what is being measured.
2 Span Indicator Indicates the percent of the 4 to 20 mA
span. (For mA and mA Loop functions only)
3 Pressure Units Indicates one of 15 pressure units available
for display.
4 Units Indicates the unit of measure for the display.
5 Menu bar Access to menu systems
2.1.1 Main Menu Functionality
There are three options on the Main Menu, CONFIG, {current display} and
MORE. The Main Menu is home for the menu display.
Current Display
2.1.1.1 Setting the Current Display
The current display is indicated by the center option on the Main Menu,
pressing the F2 key will toggle the current display. 7

8
2.1.1.2 Setting Current Display Parameters
To set the parameters of the current display use the CONFIG option to get
to the Display Configuration Menu.
Here the SELECT option will toggle through the choices for each parameter.
The first parameter is MODE. Since voltage, current and switch test modes
all use the same jacks, two of these functions cannot be used concurrently.
The ability to select certain functions is limited based on what is already
selected in another active display. The NEXT option is used to change to the
second parameter. Only Pressure mode has a second parameter. Pressures
can be read in 15 engineering units.
With a single display the following modes are available:
P[1] = Pressure on left side sensor.
P[1] ST = Switch Test with left side sensor.
mA = Milliamps measure without loop power.
mA LOOP = Milliamps measure with loop power.
VOLTS = Voltage Measure.
The following table shows which functions are available concurrently.
An X in a column indicates that the mode in the current display will not be
available for selection if the mode in that row is in use in any other active
display.

Table 4 Mode Concurrency
CURRENT DISPLAY
P[1] P[1] mA mA Volts
ST Loop
P[1]
P[1]ST X X X X
mA X X X
mA Loop X X X
Volts X X X X
2.1.1.3 Accessing Other Menus
Use the MORE option on the Main Menu to access the other menu
functions.
2.2 Using the Backlight
The backlight is controlled by the dedicated backlight key. It toggles on and
off when the key is pressed; There is a user defined timer configuration
settings for the backlight in the functions menu system (2.4.12)
2.3 Using the Zero Function
When the ZERO KEY is pressed, the calibrator will zero the current display if
a pressure mode is selected, and the pressure is within the zero limit. The
zero limits are within 5% of the full scale range of the selected sensor. If the
display indicates "OL," the zero function will not operate."
When a sensor is selected on the current display and the ZERO KEY is
pressed the calibrator subtracts the current reading from the output. The
zero limits are within 5% of the full scale range of the selected sensor. If the
display indicates "OL," the zero function will not operate.
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OTHER DISPLAYS

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2.4 Menu Controlled Functions
There are 10 'sub-main' menus that can be accessed through the MORE
option of the Main Menu. A 'sub-main' menu contains three options. The first
option is unique to the function. The second and third options of a 'sub-
main' menu are always the same. The NEXT option leads to the next 'sub-
main' menu and the DONE option returns to main window . For the last 'sub-
main' menu the NEXT option wraps around to home. See Appendix X
(pages 41 & 42) Menu Tree, for a detailed mapping of the menu structure.
A note on naming convention:
If a 'sub-main' menu has subordinate menus, it will henceforth be referred to
as {function} Main Menu. E.g. the display contrast sub-main menu will be
called the Contrast Main Menu. If not it will be called the {function} menu.
Menu Functions Overview
2.4.01 MINMAX, min / max hold……………………………… Page 11
2.4.02 CONTRAST, display contrast adjustment….……….... Page 12
2.4.03 LOCK CFG, instrument setup lock…………………… Page 12
2.4.04 SETUPS, store or recall of setups………….………… Page 12
2.4.05 AUTO OFF, setup of automatic off timer……………... Page 13
2.4.06 DISPLAY, setup numbers of display windows……..... Page 13
2.4.07 RESULOTION, select display resolution……….……..Page 14
2.4.08 LIGHT TIMER, setup of backlight timer……………… Page 15
2.4.09 HART, switches hart resistor on and off….………….. Page 16
2.4.10 DAMP, normal or slow display update rate………….. Page 16

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2.4.01 MIN MAX hold
The JOFRA HPC400 Pressure Calibrators have a min/max feature for
capturing the minimum and maximum values of any displayed parameter.
To use the MIN / Max storage function proceed as follows:
1. With the calibrator turned on and operating press the F3 key to activate
the MORE menu option. Press the NEXT button until MINMAX appears
in the left text field, now press the F1 key to activate the Min / Max
storage function.
2. After the Min / Max have been activated, pressing the F1 key will toggle
the display through the min/max values that are stored in the min/max
registers. These readings are live so that the new min/max values will be
recorded while in this mode. To reset the min/max registers simply press
the clear key. These registers are also cleared at power-up, when
pressure is zeroed or when the configuration is changed.
The Min / Max mode is cancelled by pressing F3

2.4.02 Setting the Display Contrast
1. With the calibrator turned on and operating press the F3 key to activate
the MORE menu option. Press the NEXT button until CONTRAST
appears in the left text field, now press the F1 key to activate the
contrast adjustment function.
2. Use the cursor keys to adjust the display contrast to the desired level
and then use the CONTRAST DONE option to return home.
2.4.03 Locking and Unlocking Configurations
When the LOCK CFG option is chosen the menu display returns home and
the CONFIG option on the Main Menu indicates that it is locked. Also all
menus are locked out with the exception of the %ERROR, LEAK TEST,
MINMAX, SET ∆/Σand CONTRAST menus and the Configuration Lock
Menu. When the UNLOCK CFG option is chosen the configuration is
unlocked and the menu display continues to the next sub-main menu.
To use the Locking function proceed as follows:
1. With the calibrator turned on and operating press the F3 key to activate
the MORE menu option. Press the NEXT button until LOCK CFG
appears in the left text field. Now press the F1 key to activate the
function. To reactivate the function use UNLOCK CFG in the same way.
2.4.04 Saving and Recalling Setups
The calibrator will automatically save the current set-up for recall at power-
up. Additionally 5 set-ups can be accessed through the SETUPS menu.
To use the Locking function proceed as follows:
1. With the calibrator turned on and operating press the F3 key to activate
the MORE menu option. Press the NEXT button until SETUPS appears
in the left text field. Now press the F1 key to enter the function.
2. Choose SAVE to save a set-up , RECALL to recall the set-up, or DONE
to do nothing and return home.
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13
If SAVE or RECALL is selected use the cursor keys to select the set-up
location. Then use the save option to store the current set-up into the
selected location or the recall option to recall the set-up stored in the
selected location. The display menu will automatically go home.
2.4.05 Setting AutoShut-off Parameters
The calibrator can be set to automatically shut-off after a selected number of
minutes; this function can also be disabled.
To change parameters proceed as follows:
1. With the calibrator turned on and operating press the F3 key to activate
the MORE menu option. Press the NEXT button until AUTO OFF
appears in the left text field. Now press the F1 key to enter the setup.
2. To set the auto shut off parameters select the AUTO OFF option on the
Auto Shut Off Main Menu.
3. Use the cursor keys to select the number of minutes before the
calibrator turns off or disable auto shut-off by scrolling all the way down
to 0.
4. Use the AUTO OFF DONE option to set the parameters and return
home. The auto shut off time is reset whenever a key is pressed.
2.4.06 Activating and Deactivating a Display
This is where the number of active measuring windows / channels are
selected, 1, 2 or 3 windows can be selected, to give the optimal mix
between text size, overview and amount of information.

14
To use the number of windows, pressed as follows:
1. With the calibrator turned on and operating press the F3 key to activate
the MORE menu option. Press the NEXT button until DISPLAY appears
in the left text field. Now press the F1 key to enter the function.
2. The NEXT option can be used to select which display to act upon. The
ON/OFF option turns the selected display on or off. The selected display
and current on/off state are displayed in the lower display.
3. Use the DONE option to save the changes and return home. When a
display is deactivated its configuration is retained. When the display is
activated its configuration is checked against the configurations of the
other currently active displays, if the configurations are in conflict the
recalled display's configuration is modified to avoid the conflict. If all
three displays are deactivated the LOWER display will come on
automatically
2.4.07 Low resolution function.
Due to the high accuracy of the JOFRA HPC400 the measured values are
displayed with many digits, this might be an disadvantage in some cases,
therefore the HPC has a low resolution function. The function takes away the
last digit.
To turn the function on or off, proceed as follows:
1. With the calibrator turned on and operating press the F3 key to activate
the MORE menu option. Press the NEXT button until RESOLUTION
appears in the left text field. Now press the F1 key to enter the function.
2. The select ON or OFF to turn the low resolution function on or off.

3. Pressing DONE returns to main menu.
2.4.08 Setting display Light-off Parameters
The calibrator will automatically shut-off the display back light after a
selected number of minutes.
To change parameters proceed as follows:
1. With the calibrator turned on and operating press the F3 key to activate
the MORE menu option. Press the NEXT button until LIGHT TIMER
appears in the left text field. Now press the F1 key to enter the setup.
2. Use the cursor up/down keys to select the number of minutes before the
light turns off.
3. When the desired time has been reached, press DONE SET to return to
main menu.
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16
2.4.09 Switching HART resistor on or off.
The calibrator has a built in 250 ohms serial "HART" resistor, to prevent
communication errors on live HART networks, while calibrating 4-20 mA
output from pressure transmitters. The resistor is switched into the loop, as a
serial resistor.
To change switch in or out the HART resistor proceed as follows:
1. With the calibrator turned on and operating press the F3 key to activate
the MORE menu option. Press the NEXT button until HART appears in
the left text field. Now press the F1 key to enter the setup.
2. Switches the resistor on or off.
3. DONE returns to main menu.
2.4.10 Switching damping on or off.
To give a more stable reading on fluctuating readings, the HPC400 has a
damping function. This function applies to internal sensors only. When
damping is ON, the calibrator displays a running average reading of ten
measurements. The calibrator takes approximately 3 readings per second.
To switch in or out damping proceed as follows:
1. With the calibrator turned on and operating press the F3 key to activate
the MORE menu option. Press the NEXT button until DAMP appears in
the left text field. Now press the F1 key to enter the setup.
2. Switches damping on or off.
3. DONE returns to main menu.

3. Measuring Pressure
To measure pressure, connect the calibrator using an appropriate fitting.
Choose a pressure setting for the display being used. The calibrator is
equipped with one or two internal sensors and many optional external
sensors (JOFRA APMs) are available. Be sure to choose the sensor based
on working pressures and accuracy.
Note:
Pressure sensors may be damaged and/or personnel injury may occur due
to improper application of pressure. Please refer to the table of ranges and
resolutions at the back of this manual for information on overpressure and
burst pressure ratings. Vacuum should not be applied to any gauge
pressure sensor. The calibrator display will indicate "OL" when an
inappropriate pressure is applied. If "OL" is observed on any pressure
display, the pressure should be reduced or vented immediately to prevent
damage or possible personnel injury. "OL" is displayed when the pressure
exceeds 120% of the nominal range of the sensor or when a vacuum in
excess of 2 PSI is applied on gauge range sensors.
Figure 4
Use the (ZERO) key to zero the pressure sensor when vented to
atmospheric pressure.
Important NOTE: To protect sensor integrity and prevent damage to the
sensor, the calibrator will display OL [overload] when the applied pressure
exceeds 120% of the full scale calibrated range of the sensor.
17

18
Important NOTE: To ensure accuracy of the calibrator it is critical to zero
the calibrator before a device is calibrated.
3.1 Media Compatibility
The calibrator utilizes a media isolated sensor to prevent sensor
contamination. Whenever possible clean, dry air is the media of choice. If
that is not always possible, make sure that the media is compatible with
Nickel Plated Brass and 316 Stainless Steel.
4. Measuring Current
To measure current use the input terminals on the top of the calibrator.
Select the mA function on one of the displays. Current is measured in mA
and percentage of range. The range on the calibrator is set to 0% at 4 mA
and 100% at 20 mA.
Note: The display will indicate "OL" when the measured current exceeds the
nominal range of current measurement (24 mA).
For example:
If the current measured is displayed as 75% then the mA value is 16 mA.
Figure 5