GREISINGER GMH 3161-01 User manual

H61.0.2X.6C-01
GHM Messtechnik GmbH • Standort Greisinger
User’s Manual
Handheld Digital Precision Manometer
GMH 3161-...
Version 6.5
WEEE-Reg.-Nr. DE 93889386
GMH 31 Series
Druck / Pressure

H61.0.2X.6C-01 User’s Manual GMH 3161-…page 2 of 12
CONTENTS
1GENERAL NOTE....................................................................................................................................3
2SAFETY..................................................................................................................................................3
2.1 INTENDED USE....................................................................................................................................3
2.2 SAFETY SIGNS AND SYMBOLS...............................................................................................................3
2.3 SAFETY GUIDELINES............................................................................................................................3
3PRODUCT SPECIFICATION ..................................................................................................................4
3.1 SCOPE OF SUPPLY ..............................................................................................................................4
3.2 OPERATION AND MAINTENANCE ADVICE................................................................................................4
4HANDLING .............................................................................................................................................5
4.1 DISPLAY.............................................................................................................................................5
4.2 BASIC OPERATION ..............................................................................................................................5
4.3 CONNECTIONS....................................................................................................................................6
4.4 POP-UP CLIP.......................................................................................................................................6
5START OPERATION ..............................................................................................................................7
6CONFIGURATION ..................................................................................................................................7
7REMARKS TO SPECIAL FEATURES....................................................................................................8
7.1 SEA LEVEL CORRECTION (ONLY FOR GMH 3161-12 )...........................................................................8
7.2 POWER OFF TIME................................................................................................................................8
8OUTPUT..................................................................................................................................................8
8.1 SERIAL INTERFACE..............................................................................................................................8
9INPUT ADJUSTMENT ............................................................................................................................9
9.1 ZERO DISPLACEMENT SENSOR ('OFFS') ..............................................................................................9
9.2 SCALE CORRECTION SENSOR ('SCAL')................................................................................................9
9.3 CALIBRATION SERVICES ......................................................................................................................9
10 PRESSURE CONNECTION.................................................................................................................9
10.1 DEVICE TYPE WITH ABSOLUTE PRESSURE (GMH 3161-12).................................................................9
10.2 DEVICE TYPE WITH RELATIVE PRESSURE ...........................................................................................9
11 ERROR AND SYSTEM MESSAGES.................................................................................................10
12 SPECIFICATION................................................................................................................................11
13 RESHIPMENT AND DISPOSAL........................................................................................................12
13.1 RESHIPMENT.................................................................................................................................12
13.2 DISPOSAL INSTRUCTIONS ...............................................................................................................12

H61.0.2X.6C-01 User’s Manual GMH 3161-…page 3 of 12
1 General Note
Read this document carefully and get used to the operation of the device before you use it. Keep this
document within easy reach near the device for consulting in case of doubt.
Mounting, start-up, operating, maintenance and removing from operation must be done by qualified,
specially trained staff that have carefully read and understood this manual before starting any work.
The manufacturer will assume no liability or warranty in case of usage for other purpose than the intended
one, ignoring this manual, operating by unqualified staff as well as unauthorized modifications to the device.
The manufacturer is not liable for any costs or damages incurred at the user or third parties because of the
usage or application of this device, in particular in case of improper use of the device, misuse or malfunction
of the connection or of the device.
The manufacturer is not liable for misprints.
2 Safety
2.1 Intended Use
The safety requirements (see below) have to be observed.
The device must be used only according to its intended purpose and under suitable conditions.
Use the device carefully and according to its technical data (do not throw it, strike it, …)
Protect the device from dirt.
2.2 Safety signs and symbols
Warnings are labeled in this document with the followings signs:
DANGER
Caution! This symbol warns of imminent danger, death, serious
injuries and significant damage to property at non-
observance.
Attention! This symbol warns of possible dangers or dangerous
situations which can provoke damage to the device or
environment at non-observance.
Note! This symbol point out processes which can indirectly influence
operation or provoke unforeseen reactions at non-observance.
2.3 Safety guidelines
This device has been designed and tested in accordance with the safety regulations for electronic devices.
However, its trouble-free operation and reliability cannot be guaranteed unless the standard safety
measures and special safety advises given in this manual will be adhered to when using the device.
1. Trouble-free operation and reliability of the device can only be guaranteed if the device is not subjected to
any other climatic conditions than those stated under "Specification".
If the device is transported from a cold to a warm environment condensation may cause in a failure of the
function. In such a case make sure the device temperature has adjusted to the ambient temperature
before trying a new start-up.

H61.0.2X.6C-01 User’s Manual GMH 3161-…page 4 of 12

2. If there is a risk whatsoever involved in running it, the device has to be switched off
immediately and to be marked accordingly to avoid re-starting.
Operator safety may be a risk if:
- there is visible damage to the device
- the device is not working as specified
- the device has been stored under unsuitable conditions for a longer time.
In case of doubt, please return device to manufacturer for repair or maintenance.
3. When connecting the device to other devices the connection has to be designed most thoroughly as
internal connections in third-party devices (e.g. connection GND with protective earth) may lead to
undesired voltage potentials that can lead to malfunctions or destroying of the device and the connected
devices.
This device must not be run with a defective or damaged power supply unit.
Danger to life due to electrical shock!
4. Do not use these products as safety or emergency stop devices or in any other application
where failure of the product could result in personal injury or material damage.
Failure to comply with these instructions could result in death or serious injury and material
damage.
5. This device must not be used at potentially explosive areas! The usage of this device at
potentially explosive areas increases danger of deflagration, explosion or fire due to
sparking.
3 Product Specification
3.1 Scope of supply
The scope of supply includes:
Measuring device with 9V battery
Operation manual
3.2 Operation and maintenance advice
1. Battery operation:
If ‘bAt’ is shown in the lower display the battery has been used up and needs to be replaced. However,
the device will operate correctly for a certain time. If ‘bAt’ is shown in the upper display the voltage is too
low to operate the device; the battery has been completely used up.
The battery has to be taken out, when storing device above 50 °C.
We recommend taking out battery if device is not used for a longer period of time.
After recommissioning the real-time clock has to be set again.
2. Mains operation with power supply
When using a power supply please note that operating voltage has to be 10.5 to 12 V DC.
Do not apply overvoltage!! Cheap 12V-power supplies often have excessive no-load voltage.
We, therefore, recommend using regulated voltage power supplies.
Trouble-free operation is guaranteed by our power supply GNG10/3000.
Prior to connecting the power supply to the mains make sure that the operating voltage stated at the
power supply is identical to the mains voltage.
3. Treat device and sensor carefully. Use only in accordance with above specification. (do not throw, hit
against etc.). Protect plug and socket from soiling.
_DANGER
_DANGER
_DANGER
_DANGER

H61.0.2X.6C-01 User’s Manual GMH 3161-…page 5 of 12
4 Handling
4.1 Display
1 Main display: shows actual value
2 Arrow points to the chosen measuring unit
3 Secondary display: shows min./max. or hold value
4 SL: appears if sea-level-correction is activated
(only GMH 3161-12)
5 Tara: appears if tara-function is activated
6 Not used
4.2 Basic Operation
On / Off
+
min/max bei Messung:
press short: shows the min./max. value
press again: hides min./max. value
press 2 sec.: clears particular value
Tara, zero-point adjustment:
press short: display will be set to 0
The following measuring will be
relatively displayed to the set tara
value
press 2 sec.: deactivates tara-function
press 5 sec.: Zero-Point Adjustment1)
Set/Menu:
press short: invokes configuration menu
Store/Quit:
press short: hold-function, the last measuring
value will be held in the secondary
display.
press again: hides the value
Please Note: Activating/deactivating tara clears the max- & min-memories.
1) Zero-Point Adjustment: If there is no pressure or zero-pressure (absolute) applied to the pressure ports the
device will display 0. If there is a permanent deviation (and device is operated
under steady conditions), a permanent zero point adjustment can be carried out. To
carry out the adjustment press button 3 for approx. 5 seconds (Auto Null will be
displayed shortly). The adjustment is done via the OFFSET-value of the sensor
(referring configuration menu).
To recall the manufacturer’s calibration press button 3 for approx. 15 seconds.
Please note: - A zero-point adjustment can only be carried out if the difference between the value on display
is less than 500 digits!
- If a zero point adjustment was carried out the display shows ”Corr” after a restart .
1 2 3
4 5 6
ON
OFF max Tara
Storemin
Set
Menu Quit
1 2 3
4 5 6
ON
OFF max Tara
Storemin
Set
Menu Quit

H61.0.2X.6C-01 User’s Manual GMH 3161-…page 6 of 12
4.3 Connections
Interface: Connection for el. Isolated interface adapter
(please refer to chapter 8.1)
Connection for pressure tubes:
„+“ higher pressure (non-existent at GMH 3161-12)
„-“ lower pressure (GMH 3161-12: absolute pressure)
Power supply: the mains adapter socket is located at the left side of the device.
4.4 Pop-up clip
Handling:
•Pull at label “open” in order to swing open the pop-up clip.
•Pull at label “open” again to swing open the pop-up clip further.
Pop-up clip closed
Pop-up clip at position 90° Pop-up clip at position 180°
Function:
• The device with a closed pop-up clip can be plainly laid onto a table or attached to a belt, etc.
• The device with pop-up clip at position 90° can be set up on a table, etc.
• The device with pop-up clip at position 180° can be suspended from a screw or the magnetic holder
GMH 1300.
Device attached to a belt
Device set up on a table
Device suspended from
magnetic holder
GMH 1300

H61.0.2X.6C-01 User’s Manual GMH 3161-…page 7 of 12
5 Start Operation
Connect sensor, turn on device via key.
After segment test the device displays some configuration:
• If a zero point adjustment was carried out the display shows shortly „nuLL Corr“.
After that the device is ready for measuring.
6 Configuration
To change device settings, press Menu (key 4) for 2 seconds. This will call the configuration menu.
Pressing key Menu jumps between the parameters.
The parameters can be changed with (key 2) or (key 5).
Quit (key 6) finishes the configuration and returns to standard measuring operation.
Parameter Value Description
‚Menu‘ or 
mbar, bar, … Unit: Unit of display
oFF/on Sea level correction: on or off
(only available at GMH 3161-12)
-2000 … 9999 Altitude: Input of altitude above sea level [m] (only if SL=on)
(only available at GMH 3161-12)
1 … 120 Auto Power Off time in minutes
oFF Auto Power Off deactivated
01, 11 … 91 Base address of interface
OFFS refer to list below The offset of sensor will be displaced by this value to compensate for
deviations in the probe or in the measuring device.
oFF Zero displacement inactive (=0.00)
SCAL -2.000 … 2.000 The measuring scale of sensor will be changed by this factor [%] to
compensate deviations of temperature probe or measuring device
oFF Scale correction factor inactive (=0.000)
Device type adjustable offset
GMH 3161-002 -50.0 ... 50.0 Pa
GMH 3161-01 -5.00 ... 5.00 mbar
GMH 3161-07 -50.0 ... 50.0 mbar
GMH 3161-07B -50.0 ... 50.0 mbar
GMH 3161-07H -5.00 ... 5.00 mbar
GMH 3161-13 -500 ... 500 mbar
GMH 3161-12 -500 ... 500 mbar
1 2 3
4 5 6
ON
OFF max
Store
CAL
min
Set
Menu Quit
MPaPa
bar
mbar kPa
Tara AL LoggSLPSI
mbar
MPaPa
bar
mbar kPa
Tara AL LoggSLPSI
MPaPa
bar
mbar kPa
Tara AL LoggSLPSI
MPa
Pabar
mbar kPa
Tara AL LoggSL
PSI
MPaPa
bar
mbar kPa
Tara AL LoggSL
PSI
mbar

H61.0.2X.6C-01 User’s Manual GMH 3161-…page 8 of 12
7 Remarks To Special Features
7.1 Sea Level Correction (only for GMH 3161-12 )
The device displays the absolute pressure measured at the sensor. This is not necessarily the same like the
values given by weather stations! The weather stations‘ values are giving the pressure at sea level. Usually
the sensor is placed above sea level and therefore, if the value at sea level(zero) is to be measured, the
pressure loss resulting from the actual level above sea level has to be considered! To correct the measuring
display activate the „Sea-Level-Function“ (SL, p.r.t. chapter 6). Then enter the altitude above sea level of the
sensor‘s location in meters (Alti, p.r.t. chapter 6). When activated, the display shows the SL-arrow and the
device displays the pressure value at sea level.
7.2 Power off Time
If there won’t be pressed any key and no interface communication takes place for the time of the power off
time setting (P.Off), the device will be switched off automatically to save battery power.
If P.oFF = oFF then the automatic switch off is deactivated.
8 Output
8.1 Serial Interface
By means of the serial interface and a suitable electrically isolated interface adapter (USB 3100, USB 3100 N,
GRS 3100 or GRS 3105) the device can be connected to a computer for data transfer.
With the GRS 3105 up to 5 devices of the GMH3xxx- series can be connected to one interface (see also
manual of GRS 3105). As a precondition the base addresses of all devices must not be identical, make sure
to configure the base addresses accordingly (refer menu point “Adr.” in chapter 6).
To avoid transmission errors, there are several security checks implemented e.g. CRC.
The following standard software packages are available:
GMHKonfig: Software for a comfortable editing of the device (e.g. Material selection…)
EBS 20M / 60M: 20-/60-channel software to display the measuring values
In case you want to develop your own software we offer a GMH3000-development package including:
a universally applicable Windows functions library ('GMH3000.DLL') with documentation that can be
used by the most programming languages. Suitable for Windows XP™, Windows Vista™, Windows 7™
Programming examples Visual Basic 4.0™, Delphi 1.0™, Testpoint™
Note: The measuring and display range values read back from the interface are always in the
selected measurement unit (mbar, bar...)!
Supported functions:
Code Name/Function Code Name/Function
0 Read measurement value 200 Read min display range
3 Read system state 201 Read max display range
6 Read min memory 202 Read display range - unit
7 Read max memory 204 Read display range –decimal point
12 Read ID number 208 Read # of channels
32 Read configuration flag
BitCorrectToSealevel:32
(only available at GMH 3161-12)
214 Read scale adjustment [%]
216 Read offset adjustment
220 Read altitude (only available at GMH 3161-12)
160 Set configuration flag (see above) 221 Set altitude (only available at GMH 3161-12)
174 Clear min memory 222 Read power off time (Conf-P.oFF)
175 Clear max memory 223 Set power off time (Conf-P.oFF)
176 Read min measuring range 240 Reset
177 Read max measuring range 254 Program version
178 Read measuring range –measuring unit
179 Read measuring range –decimal point
180 Read kind of measuring of sensor
199 Read kind of measuring of display

H61.0.2X.6C-01 User’s Manual GMH 3161-…page 9 of 12
9 Input Adjustment
9.1 Zero Displacement Sensor ('OFFS')
A zero displacement can be carried out for the measured value:
value displayed = value measured - offset
Standard setting: 'off' = 0.0°, i.e. no zero displacement will be carried out. Together with the scale correction
(see below) this factor is mainly used to compensate for sensor deviations. Input is in the display unit.
9.2 Scale Correction Sensor ('SCAL')
The scale of the measuring can be influenced by this setting (factor is in %):
displayed value = measured value * (1+Scal/100)
Standard setting: 'off' =0.000, i.e. value is not corrected. Together with the zero displacement (see above)
this factor is mainly used to compensate for sensor deviations.
9.3 Calibration Services
Calibration certificates –DKD-certificates –other certificates:
If device should be certificated for its accuracy, it is the best solution to return it to the manufacturer.
Only the manufacturer is capable to do efficient recalibration if necessary to get results of highest accuracy!
10 Pressure Connection
2 (or 1) universal pressure connector for 6 x 1 mm (4 mm tube inner diameter) or 8 x 1 mm (6 mm tube inner
diameter ) plastic tubes.
10.1 Device type with absolute pressure (GMH 3161-12)
Connect plastic tube to pressure port
10.2 Device type with relative pressure
For measurements of overpressure (refer to summary):
Connect plastic tube to pressure port "+".
Port "-" will not be used!
For measurements of underpressure (refer to summary):
Plug the tube to pressure port "-". The measuring range covers then up to max. overpressure range
Note: All values are displayed now as positive values. No minus sign will be shown.
Example: it is possible to measure under pressure down to -25.00 mbar, the display shows then
the value 25.00 (no minus sign).
For measurements of pressure differences:
Connect both plastic tubes to pressure port "+" and "-"; make sure to apply higher pressure to port "+".
Measure ranges:
device type over- or under pressure under pressure
GMH 3161-002 - 500.0 … 500.0 Pa ---
GMH 3161-01 - 1.00 … 25.00 mbar -25.00 … 0.00 mbar
GMH 3161-07 - 10.0 … 350.0 mbar - 350.0 … 0.0 mbar
GMH 3161-07B - 10.0 … 420.0 mbar - 420.0 … 0.0 mbar
GMH 3161-07H - 1.00 … 70.00 mbar -70.00 … 0.00 mbar
GMH 3161-13 - 100 … 2000 mbar - 2000 … 0 mbar
with option: MB -1..2 BAR - 1000 … 2000 mbar

H61.0.2X.6C-01 User’s Manual GMH 3161-…page 10 of 12
11 Error And System Messages
Display Meaning What to do?
Low battery power, device will only continue
operation for a short period of time Replace battery
Battery empty Replace battery
Mains operation without battery: wrong voltage Check power supply, replace it when
necessary
No display or
confused
characters,
device does
not react on
keypress
Battery empty Replace battery
Mains operation without battery: wrong voltage
or polarity Check power supply, replace it when necessary
System error Disconnect battery and power supplies,
wait shortly, then reconnect
Device defective Return to manufacturer for repair
Err.1 Measured value above allowable range Check: pressure above max. range?
-> measuring value to high
Sensor defective Return to manufacturer for repair
Err.2 Measured value below allowable range Check: pressure below min range?
-> measuring value to low
Sensor defective Return to manufacturer for repair
Err.4 Value is too low to be displayed, tara is set Check: display below -2000 (tara?)?
Err.9 Measured value far out of allowable range Check: pressure not within sensor range?
Err.7 System error Return to manufacturer for repair

H61.0.2X.6C-01 User’s Manual GMH 3161-…page 11 of 12
12 Specification
GMH 3161 - 002 GMH 3161 - 01 GMH 3161 - 07H GMH 3161 - 07
Measuring ranges: 1)
-500.0 … 500.0 Pa
(-5.000 … 5.000 mbar) -1.00 … 25.00 mbar -1.00 … 70.00 mbar -10.0 … 350.0 mbar
Overload: 2) (max.)
max. 250 hPa (mbar) max. 100 mbar max. 1 bar max. 1 bar
Resolution: 0.1 Pa (0.001 mbar) 1 Pa (0.01 mbar) 0.01 mbar 0.1 mbar
Accuracy: (typ.)
Hysteresis and linearity ±0.3 % FS ±0.3 % FS ±0.1 % FS ±0.2 % FS
(±0.1 % FS 3))
temp. depending 0 - 50 °C ±0.4 % FS ±0.4 % FS ±0.4 % FS ±0.4 % FS
Available units:
mbar, Pa, kPa,
mmHg, PSI, m H
2
O
mbar, bar, Pa, kPa,
mmHg, PSI, m H
2
O mbar, bar, Pa, kPa, mmHg, PSI, m H
2
O mbar, bar, kPa, MPa, mmHg, PSI, m H
2
O
GMH 3161 - 07B GMH 3161 - 13 GMH 3181 - 13
Option: MB -1..2 BAR GMH 3161 - 12
Measuring ranges: 1)
-10.0 … 420.0 mbar
(-7.5 … 315 mmHg) -100 … 2000 mbar -1000 … 2000 mbar 0 … 1300 mbar absolut
Overload: 2) (max.) max. 1 bar max. 4 bar max. 4 bar max. 4 bar abs.
Resolution:
0.1 mbar (0.1 mmHg) 1 mbar 1 mbar 1 mbar
Accuracy: (typ.)
Hysteresis and linearity ±0.1 % FS ±0.2 % FS
(±0.1 % FS 3)) ±0.2 % FS (±0.1 % FS 3)) ±0.2 % FS (±0.1 % FS 3))
temp. depending 0 - 50 °C ±0.4 % FS ±0.4 % FS ±0.4 % FS ±0.4 % FS
Available units:
mbar, bar, kPa, MPa,
mmHg, PSI, m H
2
O mbar, bar, kPa, MPa, mmHg, PSI, m H
2
O mbar, bar, kPa, MPa, mmHg, PSI m H
2
O mbar, bar, kPa, MPa, mmHg, PSI, m H
2
O
1) underpressure measurement up to the overpressure measuring range suitable (refer chapter 10.2)
2) without destruction or recalibration of sensor being necessary
3) at OPTION „higher sensor accuracy“
Pressure units: selectable
Measuring rate: slow: 4 meas./sec (ConF-Rate = Slow)
fast: >1000 meas./sec (ConF-Rate = FASt and P.dEt)
Nominal temperature: 25°C
Sensor: Piezo-resistive relative pressure sensor integrated in device.
Suitable for air and non-corrosive and non-ionizing gases and liquids.
(Not suitable for water –use air buffering)
Connection: 2 (1) metal pressure ports for connection to 6 x 1 mm (4 mm inner tube Ø) or
8 x 1 mm (6 mm inner tube Ø) tubes at the top of device
Display: 2 four digit LCDs (12.4 mm high and 7 mm high) for measuring values, and for min/
max memories, hold function, etc. as well as additional functional arrows.
Pushbuttons: 6 membrane keys
Output: 3.5 mm audio plug, stereo
Interface: Serial interface (3.5mm jack) can be connected to USB or RS232 interface of a PC
via electrically isolated interface adapter USB 3100, USB 3100 N, GRS 3100 or
GRS 3105 (see accessories).
Power supply: 9V battery, type: IEC 6F22 (included in scope of supply)
as well as additional d.c. connector (diameter of internal pin 1.9 mm) for external
10.5-12V direct voltage supply. (suitable power supply: GNG10/3000)
Power consumption: ~ 0.6 mA
Low battery warning: ' bAt '
_
+

H61.0.2X.6C-01 User’s Manual GMH 3161-…page 12 of 12
Working conditions: -20 ... +50 °C, 0 ... 95 %RH (not condensing)
Storage temperature: -20 ... +70 °C
Housing: impact-resistant ABS, membrane keyboard, transparent panel, Front side IP65
Dimensions: 142 x 71 x 26 mm (L x W x D) + metal pressure ports 11 mm at top of device
Weight: approx. 165 g
EMC: The device corresponds to the essential protection ratings established in the
Regulations of the Council for the Approximation of Legislation for the member
countries regarding electromagnetic compatibility (2004/108/EG).
Additional fault: <1%
13 Reshipment and Disposal
13.1 Reshipment
All devices returned to the manufacturer have to be free of any residual of measuring media
and other hazardous substances. Measuring residuals at housing or sensor may be a risk for
persons or environment
Use an adequate transport package for reshipment, especially for fully functional devices.
Please make sure that the device is protected in the package by enough packing materials.
13.2 Disposal instructions
Batteries must not be disposed in the regular domestic waste but at the designated collecting
points.
The device must not be disposed in the unsorted municipal waste! Send the device directly to
us (sufficiently stamped), if it should be disposed. We will dispose the device appropriate and
environmentally sound.