Ulvac GP-2001G User manual

No.SK00-7105-EI-003-03
MODEL GP-2001G, GP-2002G
PIRANI VACUUM GAUGE
INSTRUCTION MANUAL
This manual is applicable to the following gauges:
Model Serial No.
GP-2001G 0001G and higher
GP-2002G
0001G and higher
Components Division,
ULVAC, Inc.
2500 Hagisono, Chigasaki City, Kanagawa-ken, Japan
http://www.ulvac.co.jp/
Read this manual before operation and keep it
at your hand for immediate reference.

－I －
Prior to Use
Thank you for purchasing this ULVAC product.
Upon receipt of the product, verify that is the correct model ordered and that it has not been damaged during
transport.
Read this instruction manual before installing, operating, inspecting, or
maintaining the product and fully understand the safety precautions,
specifications and operating procedures regarding the product.
The copyright of this instruction manual is held by ULVAC, Inc.
You are prohibited from copying any portion of this instruction manual without
the consent of ULVAC Inc.
You are also prohibited from disclosing or transferring this instruction manual to
third parties without the express written consent of ULVAC Inc.
The contents described in this instruction manual are subject to change without
prior notice because of changes in specifications or because of product
improvements.
Safety Symbols
Safety symbols are used throughout this instruction manual to call the
operator's attention to safety. The terminology used in safety symbols is
classified below.
Indicate status of urgency of danger when failure to comply with DANGER
results in serious personal injury or death
The work ignoring this warning will lead to serious damage to human life or
factory facility (including this equipment) at a high probability.
Indicate status of danger when failure to comply with WARNING results in
serious worker’s injury or death.
The work ignoring this warning will cause possibility leading to serious
damage to human life or factory facility (including this equipment)
Indicate status of danger when failure to comply with WARNING results in
minor injury or moderate damage.
The work ignoring this warning will cause possibility leading to minor damage
to worker or breakage to equipment or necessary to adjust.
Direct hazard is not existed, describe the necessity to know
from the viewpoint of worker’s safety or correct and safe operation of
equipment
✔Note

－II －
Safety Cautions
For safe use of this vacuum gauge, carefully read this manual and comply with the warnings and cautions
given in the manual.
Turn OFF power.
If the vacuum gauge fails, immediately turn OFF the power.
Use of a failed gauge may cause fire or electric shock. For repair, contact your
local ULVAC representative or ULVAC JAPAN.
Turn OFF power.
If the vacuum gauge gets unusually hot or gives off smoke or unusual smell,
immediately turn OFF the power. Otherwise, fire can result. For safety,
contact your local ULVAC representative or ULVAC JAPAN.
Turn OFF power.
Before touching any terminal on the control rear panel or if there is a possibility
of touching it, turn OFF the vacuum gauge power.
Turn OFF power.
Whenever mounting the gauge, unplug the power cable.
Check line voltage.
Prior to turning ON the power, make sure that the vacuum gauge operating
voltage and the supply voltage are in agreement. Connection of incorrect power
can cause damage to the vacuum gauge and fire.
Operating environment
Do not connect the sensor head to a test object of which pressure is in excess of
atmospheric pressure. If the pressure in the sensor head exceeds atmospheric
pressure, the sensor head will be damaged or it will pop out from the connector,
causing injury to the surrounding, including human body. If the pressure
exceeds atmospheric pressure, provide an isolation valve so that the pressure in
the sensor head does not exceed atmospheric pressure.
Don't disassemble.
Do not try to disassemble the vacuum gauge (controller, measuring unit, sensor
head cable and sensor head).
Don't modify.
Do not modify the vacuum gauge (controller, measuring unit, sensor head cable
and sensor head). If it is modified, its functions are not warranted. Also fire
or electric shock may result.
Check connection.
For safety reasons, ground the GND terminal of the controller.
Operating environment
Do not use the gauge in a place where it may be splashed with water. If it is
splashed with water, failure, earth leakage or fire can result.
Ventilation
Do not plug the air vents of the vacuum gauge controller. If the air vents are
plugged, heat will be contained inside and the gauge may be damaged. The
gauge will not indicate normal values either.
Keep out foreign matter.
If foreign matter like metal fragments or combustibles are admitted into the
vacuum gauge through the air vents or other openings, remove them. Otherwise,
the vacuum gauge may be damaged.
Operating conditions
Operate the vacuum gauge under the environment set forth in the specifications.
Beware of impact
Do not give an impact to the sensor head.

－III －
Repacking for transfer
If the vacuum gauge is to be shipped to other site, repack it in the same way as
on delivery. If the vacuum gauge is shipped bare, it may be damaged.
Discarding
When discarding the vacuum gauge, comply with your local regulations.
Please note that any product supplied by our company can be disused only at the
customer’s responsibility and expense. And, the product in the meaning of this
passage includes its appurtenances, annexed documents and / or media, etc.
attached to, as well as the product in itself.
Especially, a sensor head used in an atmosphere that can cause hazards to the
human body must be disposed of by a specialist in disposal.
Maintenance
The electrical circuitry inside this unit uses aluminum electrolytic capacitors. In
general, aluminum electrolytic capacitor
s possess an operating life and that
operating life decreases the more the ambient temperature increases. To prevent
damage to the device, we recommend maintenance at ULVAC about once every
three years.
Lifetime of the parts (Connector-area)
In the connector-area such as a sensor head cable or GP-H, there is a life time.
When a life time comes, displays are showing error or right pressure does not
show. Even at the low number of plug-in and out, when a load at the inclination
comes also the lifetime comes.
✔Note
✔Note

－IV －
Revision History
DATE No. Reason
Mar. 23, 2007 00 S/N:00001～ first version
Oct. 31, 2013 01 ・Changed description of safety symbol.
・Section 1.1, Changed accuracy description.
・Section 1.1 and 1.2, Changes to accessories and options.
・Section 1.2, WP-04 and WP-05 were discontinued.
・Section 2.2.5, Added sensor head installation method to GP-H.
・Section 4.1, Changed the overall operation diagram.
・Chapter 6, Change fuse specification.
・Chapter 7, Change warranty.
・Chapter 8, Added certificate of Decontamination.
Nov. 19, 2014 02 ・Added a note that the connector part has a limited life as a safety
precaution.
・Detailed option details.
・Corrected an error.
Dec. 2, 2019 03 ・Section 1.1, Added inrush current.
・Section 1.2, Do not attach instruction manuals from standard
accessories.
・Section 1.3.5, Added option.
・Corrected an error.

－V －
Table of Contents
PRIOR TO USE............................................................................................................................................................................. Ⅰ
SAFETY SYMBOLS..................................................................................................................................................................... Ⅰ
SAFETY CAUTIONS................................................................................................................................................................... Ⅱ
REVISION HISTORY.................................................................................................................................................................. Ⅳ
1. GENERAL DESCRIPTION ............................................................................................................................................... 1
1.1. SPECIFICATIONS .............................................................................................................................................................. 1
1.2. STANDARD ACCESSORIES............................................................................................................................................... 1
1.3. OPTION ............................................................................................................................................................................. 2
1.3.1. Sensor head............................................................................................................................................................... 2
1.3.2. Measuring unit......................................................................................................................................................... 2
1.3.3. Sensor head cable.................................................................................................................................................... 2
1.3.4. Supply cable 3m（only GP-2001G）.................................................................................................................. 2
1.3.5. Others.......................................................................................................................................................................... 2
1.4. DESCRIPTION OF COMPONENTS................................................................................................................................... 3
1.4.1. Front panel................................................................................................................................................................ 3
1.4.2. Rear Panel .................................................................................................................................................................4
2. INSTALLING THE PIRANI VACUUM GAUGE ...................................................................................................... 5
2.1. PRELIMINARY OPERATION ............................................................................................................................................ 5
2.2. INSTALLATION .................................................................................................................................................................5
2.2.1. Installing the controller.......................................................................................................................................... 5
2.2.2. Installing the sensor head..................................................................................................................................... 6
2.2.3. Installing the supply cable .................................................................................................................................... 7
2.2.4. Electrical connection................................................................................................................................................ 7
2.2.5. A sensor head installation method to GP-H................................................................................................... 9
3. OPERATING PROCEDURE ...........................................................................................................................................10
3.1. CAUTIONS IN HANDLING.............................................................................................................................................10
4. OPERATING PROCEDURE ...........................................................................................................................................11
4.1. SUMMARY OF THE OPERATION METHOD ..................................................................................................................11
4.2. SELECTING THE RECORDER OUTPUT .......................................................................................................................12
4.3. SELECTING THE UNIT OF PRESSURE ........................................................................................................................12
4.4. DISPLAY AND CHANGE OF SETPOINT COMPARISON VALUE ................................................................................12
4.5. ADJUSTING THE RECORDER OUTPUT .......................................................................................................................13
4.6. RECORDER OUTPUT......................................................................................................................................................14
4.7. SETPOINT OUTPUT .......................................................................................................................................................16
4.8. ZERO RESETTING FUNCTION......................................................................................................................................16
5. APPENDIX ............................................................................................................................................................................17
5.1. PRINCIPLES OF OPERATION ........................................................................................................................................17
5.2. TYPES OF GAS MEASURED AND INDICATION ..........................................................................................................18
5.3. CHANGE OF INDICATION WITH AMBIENT TEMPERATURE ....................................................................................20
6. TROUBLESHOOTING......................................................................................................................................................21
7. WARRANTY..........................................................................................................................................................................23
8. CHINA ROHS DECLARATION ....................................................................................................................................24
9. CERTIFICATE OF DECONTAMINATION...............................................................................................................25
10. RELATED DRAWINGS ...............................................................................................................................................26

1
1. GENERAL DESCRIPTION
The Model GP-200□G is a constant temperature type Pirani Vacuum gauge utilizing the thermal
conduction of gas. The controller and measuring unit being separated from each other, measurement is
less affected by the difference in the sensor head cable length. (No readjustment is requires when the
cable length is changed.)
The display is a large‐sized 7-segment digital indicator (red LED) that can be easily read.
The DIN size has been employed and the weight has been reduced considerably from that of the
predecessor models.
M3 terminal block is employed for easy connection with an external control system.
Pressure comparison values can be set at three places. The comparator output is delivered as transistor
output (open collector).
Power voltage of Pirani Vacuum Gauge Model: GP-2001G and GP-2002G are specified below.
GP-2001G：AC 85～264 V 50/60 Hz
GP-2002G：DC 24 V
Specifications
Name
Pirani vacuum gauge
Measurable pressure range
0.4 to 3000 Pa
Measuring point
1 point
Display
7-segment digital Indicator (red LED)
0.0
～
3000.0 Pa
Display sampling time
100 msec
Measurement accuracy
4.0
×
10-1 Pa
～
1.0
×
10+1 Pa :
±
50%
1.0×10+1 Pa ～5.1×10+1 Pa : ±30%
5.1×10+1 Pa ～7.6×10+2 Pa : ±15%
7.6×10+2 Pa ～1.0×10+3 Pa : ±30%
1.0
×
10
+3
Pa
～
2.7
×
10
+3
Pa :
±
50%
Recorder output signal
-1.5 to 11.5 VDC (maximum recorder output range)
①Lin 0 output 0 to 10 V: 0 to 3000 Pa
②Lin 1 output 0 to 10 V: 0 to 1000 Pa
③
Lin 2 output 0 to 10 V: 0 to 100 Pa
Zero correction input
No-voltage contact input
Input current : 10mA
Setpoint output
3 points Transistor output (open collector)
Rated load voltage : 24 VDC
Max. Load current : 50 mA (saturation voltage:1V)
Interchangeability of sensor head
Within ± 3% at the filament resistance value (same type of sensor
head)
Operating tempreature range
10
℃
to 40
℃
Power requirements
GP-2001G
：
AC 85
～
264 V
50/60 Hz
GP-2002G
：
DC 24 V ± 10%
Power consumption
10 VA
Inrush Current AC100V: 20A or less / 2ms or less
AC200V: 8A or less / 2ms or less
Outside dimensions
48H×96W×151D(mm)
Weight
0.4 kg
Standard accessories
Quick manual
Paper
1 copy

2
Option
1.3.1. Sensor head
Sensor head
WP-01/WP-03/WP-03/WP-16
WPB-10-034
Filament material
Pt
Pt
Other materials
BS/Ni-plating
Ni
、
Kovar
、
Glass
、
SnSbCu
SUS304
、
Cu(Gasket)
FeNiCo(Ni-plating)
、
Al2O3
Permitted leak ratio
1
×
10-8Pa
･
m3/s max
1
×
10-8Pa
･
m3/s max
Weight(g)
WP-01
：
about 26
、
WP-02
：
about 45
WP-03
：
about 63
、
WP-16
：
about 77
about 173
Internal volume(cm3)
WP-01
：
about 19
、
WP-02
：
about 17
WP-03
：
about 17
、
WP-16
：
about 22
about 18
Pressure max
※
1
< 2
×
10+5Pa(abs)
< 2
×
10+5Pa(abs)
Bakeout
※
2
80
℃
max
250
℃
max
※1:The breakdown pressure of the flange and clamp are to be considered otherwise.
※2:Bakeout temperature is a temperature of the sensor unit. Please remove the electronics(GP-H) or the
conversion cable(GP-BH).
※3:WP-04 andWP-05 discontinued producing in August, 2012.
1.3.2. Measuring unit
Measuring unit
GP-H
GP-BH
（
Conversion cable 2m
）
Sensor head
WP-01
、
WP-02
WP-03
、
WP-16
WPB-10-034
Weight 35g
GP-BH: 0.13kg
Conversion calbe: 0.2kg
remarks
GP-H for WP-01/WP-02 and
WP-03/WP-16 are different.
1.3.3. Sensor head cable
Sensor head cable
2
、
5
、
10
、
15
、
20
、
30
、
50
、
100m
Weight(kg)
0.2/0.4/0.7/1.0/1.3/1.9/3.9/7.7
1.3.4. Supply cable 3m（only GP-2001G）
※The plug specification of supply cable is AC125V / 7A.
1.3.5. Others
JCSS calibration certificate
Only combination with sensor unit
General proofreading test
Only combination with sensor unit
Inspection certificate
Calibration certificate
This gauge is based on the measurement of thermal conductance and the
indicated value may change depending on the type of the sensor head. Some
sensor heads may require change of the circuitry or structure of the measuring
unit. Therefore, if the type of the sensor head is changed after delivery of the
gauge, re-
adjustment will be required. Factory adjusted conditions (type of
sensor head) are inscribed on the measuring unit GP-H. Check them before
operation.

3
Description of Components
1.4.1. Front panel
2.SETPOINT OUTPUT ACTION DISPLAY
DATA
ALM
GP-200□
kPa
Pa
SP1 SP2 SP3
SET
ZERO
5. DISPLAY OF UNIT OF PRESSURE
1. OPERATING SWITCH
3. PV INDICATOR 4. SV INDICATOR
Fig. 1-1 Front Panel of GP-200□G
(1) Operation switch
ALM Used to display and change the comparison set value (setpoint)
ZERO Used to set and cancel the zero point correction function
DATA Used to change data
▼
Used to shift the decimal place of data when changing data.
▲Used to change data
SET Used to finalize data,etc.
Refer to section 4 for the operating procedure.
(2) Comparison (setpoint) output action display
The green LED comes on when the comparison output is ON.
(3) PV indicator
Main indicator that displays the comparison set value and set value for output adjustment, in
addition to the current measurement value. If the measurement value exceeds the scale limit or if the
sensor head filament has blown out, “------“ will blink on the display.
(4) SV indicator
An auxiliary indicator that explains the contents of the PV indicator. Nothing is displayed or in
normal measuring condition.”OFF” is displayed when the comparison set value is displayed or in
the output adjustment setting.
(5) Display of unit of pressure
The LED for the selected unit of pressure comes on.

4
1.4.2. Rear Panel
GP-2001G
GP-2002G
Fig. 1-2 Rear Panel of GP-200□G
(1) Sensor head cable connector
A connector to which the supplied sensor head cable is to be connected.
(2) Terminal block for input / output
Terminal block for connecting input/output such as connection of input power, zero point correcting
function input, comparison (setpoint) output, recorder output, etc. A 3mm-dia. solderless terminal is
best suited to connection.
When connecting the input / output wiring, do not make mistake in wiring. Also cover the solderless
terminal with insulating covering so that adjacent terminals are not shorted.
(3) Fuse
The fuse protects the power supply. Normally, it does not blow out. If it blows out, contact your
local ULVAC service center or representative for repair without taking any action.
1
2
3

5
2. INSTALLING THE PIRANI VACUUM GAUGE
Turn OFF power
Whenever mounting the vacuum gauge, unplug the power cable.
Preliminary Operation
• Unpack the vacuum gauge and check quantities.
• Check components for possible damage.
Installation
2.2.1. Installing the controller
Ventilation
Do not plug the air vents of the vacuum gauge controller. If the air vents are
plugged, heat will be contained inside and the gauge may be damaged. The
vacuum gauge will not indicate a normal value either.
Keep out foreign matter
If foreign matter like metal fragments or combustibles are admitted into the
vacuum gauge through the air vents or other openings, remove them. Otherwise,
the vacuum gauge may be damaged.
Operating environment
Do not use the vacuum gauge in a place where it may be splashed with water.
If it is splashed with water, failure, earth leakage or fire can result.
Check connection
For safety reasons, ground the GND terminal of the controller.
Secure a space for cable connection on the batch.
1) Panel
a) This instrument is the panel mounting type.
b) Board thickness : 1.0～4.0mm
c) Panel cut : 91.5×44.5mm
d) If the instruments are mounted side by side, provide a spacing between controllers as shown
in the figure below.
Fig. 2-1
Dimensions of holed in the panel

6
2) How to mount
a) Remove the metal fitting from the controller.
b) Fit the controller into the front panel.
c) Attach the metal fittings in the original position from the back of the panel.
Fig. 2-2
GP-200 □G mounted in panel
2.2.2. Installing the sensor head
Operating environment
Do not connect the sensor head to a test object of which pressure is in excess
of atmospheric pressure. If the pressure in the sensor head exceeds
atmospheric pressure, the sensor head will be damaged or it will pop out from
the connector, causing injury to the surrounding, including human body. If the
pressure exceeds atmospheric pressure, provide an isolation valve so that the
pressure in the sensor head does not exceed atmospheric pressure.
Beware of impact
Do not give an impact to the sensor head.
Check wiring
Check that there are no mistakes with the wiring before turning the power
on. There is a risk of damage and fire if wired incorrectly.
Check wiring
Ensure that the power supply cable (crimping terminal section) does not
touch other conductive components on the control, etc.
Check power supply voltage
Before turning on the power supply, check that the vacuum gauge operating
voltage and the supply voltage are the same.
If the wrong power supply is mistakenly connected, there is a risk of damage
to the vacuum gauge and a risk of fire.
Install the sensor head to the vacuum gauge port of a vacuum system.
(1) Measuring position
• This gauge measures the static pressure in the position where the sensor head is connected.
If there is gas flow or an outgas source or an intense electron or ion generating source, the
measurement value will be affected. So select the measuring position carefully.
Note that if the sensor head is subjected to vibration, heat radiation, high intensity magnetic
field or intense radiation, correct pressure measurement may not be made.
• Because of its principles of operation, the Pirani vacuum gauge indication is affected by the
ambient temperature of the sensor head. Be careful that the ambient temperature deviates
considerably from the calibrating temperature (about 25°C).

7
(2) Installing the sensor head
• Install the vacuum gauge in such a manner that the sensor head mounting opening plane is
parallel with gas flow. See to it that gas does not enter the sensor head in the form of beam.
• The vacuum gauge filament is as thin as 25 microns in diameter. Avoid use in a place
where vibration is at a high level, if possible. Be careful in selecting the installation place
and handling the sensor because major cause of filament burnout is mechanical impact.
Be careful in selecting the place of installation and in handling.
• To install the sensor head, use an O-ring that releases little outgas.
Use of a materiel that releases much outgas like rubber pipe or grease can be a cause of error.
2.2.3. Installing the supply cable
Turn OFF power.
Before touching any terminal on the control rear panel or if there is a possibility
of touching it, turn OFF the vacuum gauge power.
Check line voltage.
Prior to turning ON the power, make sure that the vacuum gauge operating
voltage and the supply voltage are in agreement. Connection of incorrect power
can cause damage to the vacuum gauge and fire.
Check connection.
For safety reasons, ground the GND terminal of the controller.
Connect the power cable to the connecting terminal block No.19 and 20 on the rear panel using a
solderless terminal. Before connection, check the polarity of the power to the GP-2002G.
Also ground pin No.18, which is a grounding terminal.
2.2.4. Electrical connection
Check line voltage.
Prior to turning ON the power, make sure that the vacuum gauge operating
voltage and the supply voltage are in agreement. Connection of incorrect power
can cause damage to the vacuum gauge and fire.
Check connection.
For safety reasons, ground the GND terminal of the controller.
Operating conditions
Operate the vacuum gauge under the environment set forth in the specifications.
Make electrical connection after installing components.
Fix the cable by taking care not to exert undue force to the connection between the sensor head and
sensor head cable and the connection between the controller and sensor head cable.
Lay the sensor head cable away from power lines, if possible. Noise may occur.
Moving the sensor head cable will generate frictional electricity between conductor and insulator,
which can cause an error at a low pressure.
Avoid installation of the vacuum gauge in a high temperature or high humidity place.
Securely fasten the connector fixing screw.

8
Fig. 2-3 GP-200□G overall connection diagram
CONVERSION CABLE
(WBP-10)
GP-200□G
SENSEOR HEAD CABLE
（GP-H/BH）

9
2.2.5. A sensor head installation method to GP-H
Screw for fixation
The installation methods of a screw for fixation are different by a sensor head.
①
Install a screw for fixation that is atta
ched to GP-H to a sensor head. By the
kind of the sensor head, installation met
hods are different
For sensor head WP-01, 02
For sensor head WP-03, 16
It is inserted a screw for
fixation by the vent sid
e of the sensor head.
②
Tighten a screw for fixation in
the main body of GP-H, and pl
ease fix it.
Insert a screw for fixation from the connector
side of the sensor head.
Please insert it diagonally like a figure.

10
3. OPERATING PROCEDURE
Cautions in Handling
(1) When power is applied to this gauge, it starts measurement after a delay of approx. three seconds.
However, temperature drift or other problem due to power application is likely. So wait for more
than one minute after applying power to the sensor head until the indication is stabilized.
(2) For precision measurement, wait for more than 30 minutes after turning ON power until the sensor
head temperature is in equilibrium. In a series of measurements, more stabilized measurement can
be made by keeping the power to the sensor head ON during the measurements.
(3) If the sensor head is exposed to chemically active gas or highly adsorbing gas, its characteristics
may change.
In such a case, repeat pumping (flushing) operation after filling the vacuum chamber with nitrogen
gas, inert gas or dry air with power applied to the sensor head.
The previous characteristics may be restored.
Even with these types of gas, however, avoid the flushing operation by blowing gas into the opening
of the sensor head.
If there is no prospect of the characteristics being restored by this flushing operation, replace the
sensor head.
(4) The Pirani gauge is sensitive to all types of gases, but the sensitivity differs depending on the types
of gas.
This gauge indicates pressure by assuming that the gas is nitrogen gas.

11
4. OPERATING PROCEDURE
Summary of the operation method
NORMAL
DISPLAY
Selecting the recorder output
▲SET ＋
1 second later
Selecting the unit of
pressure
▲
SET
＋Pressing
DATA ＋
Change setpoint comparison
value
ALM
Adjusting the recorder
output
▲
SET
＋
SV indicator “0” (Lin0)
SV indicator “1” (Lin1)
SV indicator “2” (Lin2)
▲SET ＋Pressing
SV indicator “SP1”／PV indicator “setpoint value”
SV indicator “SP2”／PV indicator “setpoint value”
SV indicator “SP3”／PV indicator “setpoint value”
ALM
ALM
Pressing
ALM
DATA change the comparison value
▲Change the value
▲
and
Setting the value
SET
”Pa” LED turns on
”kPa” LED turns on
▲
SET Pressing
Change
SET CancelFinalize DATA
▲adjustment
▲
and
Pressing
Pressing
Pressing
Pressing
Pressing

12
Selecting the Recorder Output
The recorder (analog) output signals of this gauge include Lin1 and Lin2, which can be selected.
Lin0
0 to 3000 Pa : 0 to 10 V
Lin1
0 to 1000 Pa : 0 to 10 V
Lin2
0 to 100 Pa : 0 to 10 V
(1) Pressing the [▲] and [SET] switches simultaneously displays “0”, “1” or “2” on the SV indicator
for one second. Select the desired output.
*Default setting: Lin1
Selecting the Unit of Pressure
This gauge permits selection of “Pa” or “kPa” at the unit of pressure.
(1) Pressing the [DATA], [
▼
] and [SET] switches simultaneously sets up the unit changeover mode.
(2) Press the [▲] switch to select the desired unit of pressure.
(3) Pressing the [SET] switch finalizes the unit and sets up the normal measurement mode.
* Default setting: “Pa”.
Display and Change of Setpoint Comparison Value
This gauge has three setpoint outputs (SP1, SP2, SP3), permitting independent setting of comparison
value.
The comparison value can be arbitrarily set between 0.0 and 3000.0 Pa.
ALM ALM ALM
NORMAL DEIPLAY SP1 DISPLAY
SP1 SP2 SP3
Ｓ Ｓ
SP1 ALM SP2 ALM SP3 ALM
SET SET SET
SP2 DISPLAY SP3 DISPLAY
SP1 SETTING SP3 SETTING
SP2 SETTING
CANCEL CANCEL
CANCEL
FINALIZE FINALIZE
FINALIZE
(1) The comparison value setting mode and the normal measurement mode can be changed over from
one to the other by pressing the [ALM] switch on the front panel. Select the required indicator while
watching the SV indicator.
(Example) To display and change the comparison value of SETPOINT, press [ALM] switch
once to display “SP1” on the SV indicator.
(2) To change the comparison value, press the [DATA] switch, and the one of the displayed decimal
places will blink. Move this blinking place to the decimal place to be changed by pressing the [
▼
]
switch. When the decimal place is determined, press the [▲] switch to display the desired numeric
value.
In the same matter, set all the decimal places to the desired value using the [
▼
] and [▲] switches.
Here, pressing the [SET] switch completes the change of the comparison value.
(3) Upon completion of the display and change of the comparison value, press the [ALM] switch to
restore the blank state (measurement status) in while nothing is displayed on the SV indicator.

13
Adjusting the Recorder Output
Adjustment has been completed before shipment from factory. If the correlation between the displayed
value and the output value cannot be obtained, make adjustment by using the following procedure.
NORMAL DISPLAY
＋SET
ＸＸＸＸ
?oL
SET DATA
ＸＸＸＸ
?oH
SET DATA
▲
OUTPUT ZERO ADJUSTMENT
OUTPUT SPAN ADJUSTMENT
CANCEL
CANCEL
FINALIZE
FINALIZE
NORMAL DISPLAY
Data can be set with the [▲] switch and ± of the data can be selected with the [
▼
] switch. If “-“ is
displayed in the “?” portion on the SV indicator shown in the figure above, each press on the [▲] switch
decrements the value by one and, if the display is blank, the value is incremented by one.
The data setting range with the [▲] switch is ±1500 and the output adjustment range is approx. ±20%
both in zero and span adjustment.(The numeric values displayed in this mode are not directly related to
the actual recorder output value. Make adjustment while measuring the output using a voltmete.