GREISINGER GMH3110 User manual

H31.0.11.6C-11
User’s Manual
Handheld Digital Pressure-Meter
GMH3110
Version 5.1
for GMSD – Pressure Sensors

H31.0.11.6C-11 User’s Manual GMH3110 page 2
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CONTENTS
1 GENERAL................................................................................................................................................ 2
1.1 SAFETY REQUIREMENTS....................................................................................................................... 2
1.2 OPERATION AND MAINTAINANCE ADVICE............................................................................................... 2
1.3 CONNECTIONS..................................................................................................................................... 3
1.4 DISPLAY.............................................................................................................................................. 3
1.5 BASIC OPERATION ............................................................................................................................... 3
2 CONFIGURATION ................................................................................................................................... 4
2.1 UNIT: CHOICE OF THE DISPLAY UNIT .................................................................................................... 4
2.2 SEA LEVEL CORRECTION FOR ABSOLUTE PRESSURE SENSORS ............................................................. 4
2.3 P.OFF: AUTO POWER OFF TIME........................................................................................................... 4
2.4 ADR: BASE ADDRESS OF INTERFACE..................................................................................................... 4
3 MEASURING OF WATER LEVEL – DISPLAY UNIT [M]......................................................................... 4
4 CALIBRATION SERVICES ...................................................................................................................... 4
5 PRESSURE CONNECTION TO THE SENSORS..................................................................................... 5
6 THE SERIAL INTERFACE ....................................................................................................................... 5
7 ERROR AND SYSTEM MESSAGES ....................................................................................................... 6
8 SPECIFICATION...................................................................................................................................... 7
9 SENSORS (03/2005)............................................................................................................................... 8
10 ACCESSORIES .................................................................................................................................... 8
1 General
1.1 Safety Requirements
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".
2. Device and sensors have to be handled with care (don’t throw, hit, etc.). Protect plugs and sockets from
soiling.
3. 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.
4. If device is to be connected to other devices (e.g. via serial interface) the circuitry has to be designed
most carefully. Internal connection in third party devices (e.g. connection GND and earth) may result in
not-permissible voltages impairing or destroying the device or another device connected.
Warning: If device is operated with a defective mains power supply (e.g. short circuit from mains voltage
to output voltage) this may result in hazardous voltages at the device (e.g. at sensor socket or interface).
5. 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 period of time.
In case of doubt, please return device to manufacturer for repair or maintenance.
1.2 Operation And Maintenance Advice
•Battery Operation
If and ´bAt´ are shown in the secondary display the battery has been used up and needs to be
replaced. The device will, however, operate correctly for a certain amount of 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.
Please note: We recommend to take out battery if device is not used for a longer period of time!
!!

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main display: shows measuring value.
!
: indicates weak battery or other warnings
secondary display: min-, max- or hold value
Logg: no function
AL: no function
Units: an arrow points to
the chosen measuring unit
Tara: appears if tara-
function is activated.
SL: appears if sea-level-
correction is activated
•Mains Operation With Power Supply
Warning: 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.
!Connecting/Changing Sensors
Do not use insuitable sensors. Connecting other devices/sensors as specificated may cause a damage to
the instrument and device/sensor! Switch off device before changing the sensor.
Connect sensor before switching on the device, otherwise the sensor may not be detected correctly.
When connecting the sensor the connector may not lock correctly. In such case take the plug not at the
casing but at the buckling protection at the end of the plug. If plug is entered correctly, it will slide in
smoothly. To disconnect sensor do not pull at the cable but at the plug (to open locking mechanism).
1.3 Connections
Connection for pressure sensors of the GMSD-family (p.r.t. chapter 9)
Interface: Connection for el. isolated interface adapter (p.r.t. chapter 6)
The mains adapter socket is located at the left side of the device.
1.4 Display
1.5 Basic Operation
When switching on the device and a zero point adjustment was carried out it shows shortly „nuLL Corr“.
On-/Off-Switch
Tara: Calling of tara function, zero point adjustment
min/max: Showing the min- resp. max-memory in sec. display
Store/Quit: Calling of hold function
Set/Menu: Calling of configuration
Max Memory: Pressing ´max´ (key 2) shows the maximum of the measured values. Pressing it again
hides it. To clear the max memory press key ´max´ for >2 seconds.
Min Memory: Pressing ´min´ (key 5) shows the minimum of the measured values. Pressing it again
hides it. To clear the min memory press key ´min´ for >2 seconds.
Hold Function: By pressing ´Store/Quit´ (key 6) the last measuring value will be held in the secondary
display. Pressing it again hides it.
Tare Function: By pressing ´Tara´ (key 3) the display will be set to 0. All measurings from then on will be
displayed relatively to the set tare value. When tara function is activated, the arrow "Tara"
appears in the display. To deactivate tare function press ´Tara´ for >2 seconds.
Please Note: Activating/deactivating tara clears the max- & min-memories.
Zero-Point Adjustment: (for rel. pressure sensors only) If there is no pressure 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 key 3 for 5 seconds.
(Please note: A zero-point adjustment can only be carried out if the difference between the
value on display and the value calibrated on site is less than 2%! E.g. for the measuring
range of –1.00 ..+25.00mbar, =>zero-point adjustment up to 0.50mbar possible)
To recall the manufacturer`s calibration press button 3 for approx. 7 seconds.
Note: If a zero-point adjustment was carried out, this will be signalled by the short
displaying of „NuLL Corr“ when switching on the device.
123
456
ON
OFF max
Tara
Storemin
Set
Menu Quit

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2 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 5(key 2) or 6(key 5).
Quit (key 6) finishes the configuration and returns to standard measuring operation.
2.1 Unit: Choice Of The Display Unit
Choose the desired display unit, the referring unit is displayed by means of a functional arrow in
the display. The selection is permanently stored in the sensor, therefore after reconnecting the
sensor the unit will instantly reappear. The choice depends on the used sensor.
The unit [m] =H2O is just supported by devices with [m] printed below the display!
2.2 Sea Level Correction For Absolute Pressure Sensors
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 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 zero has to be considered!
!To correct activate the „Sea-Level-Function“:
Select „on“ in the menu „SL“ with 5(key 2) or 6(key 5).
!Jump to the next parameter „Alti“ by pressing Menu (key 4).
Then enter the altitude above sea level of the sensor‘s location in meters and leave the
configuration by pressing Quit (key 6)
If the sea level correction is active this will be shown by the functional arrow „SL“ in the display, the device
now displays the absolute pressure at sea level (zero).
2.3 P.oFF: Auto Power Off Time
The device will be automatically switched off if no key is pressed/no interface communication
takes place for the time of the power off time.
The power off time can be set to values between 1 and 120 min. It can be completely
deactivated by setting the parameter to ‚P.oFF = oFF“.
2.4 Adr: Base Address of Interface
Up to 10 devices of the GMH3xxx- handheld-family can be connected to a serial interface at
once (depending on interface converter, e.g. GRS3105: 5 devices). To get access to each
device the base addresses of the devices have to be different. For example choose 01 for the
first, 11 for the second device and so on.
3 Measuring Of Water Level – Display Unit [m]
(only for devices with ‚m‘ printed below the display)
When using a suitable waterproof pressure sensor the unit [m] for meters of water can be set in the menu
“Unit“. 10m of water are roughly 1 bar over pressure. Measurings can be made e.g. like described below :
•With abs. pressure sensor (SL oFF!): Press ‚Tara‘ when sensor is at ambient air and then bring sensor to
the depth to be measured. The display shows now the depth in [m].
•With rel pressure sensor: bring tube connection for lower press. in contact to ambient air by means of a
tube (no water contact!) and bring the sensor with its open press. connection for higher pressure to water
depth to be measured (display and is compensated for pressure changes in ambient air).
4 Calibration Services
Calibration certificates – DKD-certificates – other certificates:
If device should be certificied for its accuracy, it is the best solution to return it with the referring sensors to
the manufacturer.
Only the manufacturer is capable to do efficient recalibration if necessary to get results of highest accuracy!
MPaPabarmba r kPa
Tara A L LoggSLPSI
mbar
MPaPabarmba r kPa
Tara A L LoggSLPSI
MPaPabarmba r kPa
Tara A L LoggSLPSI
MPaPabarmba r kPa
Tara AL LoggSLPSI
MPaPabarmbar kPa
Tara AL LoggSLPSI
mbar

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5 Pressure Connection To The Sensors
The device is designed to be connected to the sensors of the GMSD...-series without a new calibration being
necessary. Therefore a great variety of replaceable sensors of e.g. –1.999...2.500 mbar relative up to
0...400.0 bar absolute pressure can be connected to the device (p.r.t. chapter 9)
Relative Pressure Sensors (Types: GMSD...MR. GMSD...BR)
•For measurements of over- or under pressure:
Connect plastic tube with internal dia of 4 mm to pressure port "B". Port "A" will not be used!
Pressure sensors GMSD 2,5 MR, GMSD 25 MR and GMSD 350 MR allow for measurements of under
pressure up to the entire over pressure measuring range by re-plugging the tube to pressure port "A".
Please note that all values are displayed as positive values. No minus sign will be shown. (Example for
GMSD 25 MR: For tube connection "B" the measuring range covers -19.99 to 25.00 mbar. If you replug
to port "A" under pressure measurements down to -25.00 mbar could be carried out with the display
showing the value 25.00 (no minus sign).
•For measurements of pressure differences:
Connect both plastic tubes with an internal dia of 4 mm to pressure port "B" and "A"; make sure to apply
higher pressure to port "B".
Absolute pressure sensors: (types: GMSD...BA)
Connect plastic tube with an internal dia of 4 mm to pressure port "A". (Port "B" is not used.)
Stainless steel pressure sensors: (types: GMSD...MRE, GMSD...BRE, GMSD...BAE)
For measurements of over-, under- or absolute pressure screw sensor to G1/4" pressure terminal or plug
plastic tube to a suitable adapter.
6 The Serial Interface
By means of the serial interface and a suitable electrically isolated interface adapter (GRS3100, GRS3105 or
USB3100) the device can be connected to a computer for data transfer. With the GRS3105 up to 5 devices
of the GMH3xxx- series can be connected to one interface (see also manual of GRS3100, GRS3105 or
USB3100). To avoid transmission errors, there are several security checks implemented e.g. CRC.
The following standard software packages are available:
!EBS9M: 9-channel software to display the measuring values
!EASYCONTROL: Universal multi channel software (EASYBUS-, RS485-, or GMH3000- operation
possible) for real-time recording and presentation of measuring data of one GMH3xxx
device in the ACCESS®-data base format
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
•Programming examples Visual Basic 4.0, Testpoint (Keithley Windows measuring software)
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 180 Read kind of measuring of sensor
3 Read system state 194 Set display unit
6 Read min memory 199 Read kind of measuring of display
7 Read max memory 200 Read min display range
12 Read ID number 201 Read max display range
202 Read display range - unit32 Read configuration flag
BitCorrectToSealevel:32 (only abs. press.
Sensors) 204 Read display range – decimal point
160 Set configuration flag (see above) 208 Read # of channels
174 Clear min memory 220 Read altitude (only abs. press sensors)
175 Clear max memory 221 Set altitude (only abs. press sensors)
176 Read min measuring range 222 Read power off time (Conf-P.oFF)
177 Read max measuring range 223 Set power off time (Conf-P.oFF)
178 Read measuring range – measuring unit 240 Reset
179 Read measuring range – decimal point 254 Program version

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7 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 sensor connected Switch off device and connect sensor
or Err.9
Connected sensor or device defective If second sensor available, check if device
is ok. Return defective device/sensor to
manufacturer for repair
Err.9 Measured value far out of allowable range Check: pressure not within sensor range?
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
No display or
confused
characters,
device does
not react on
keypress Device defective Return to manufacturer for repair
Measured value above allowable range Check: pressure not within sensor range?
-> measuring value to high
Err.1
Sensor defective Return to manufacturer for repair
Measured value below allowable range Check: pressure not within sensor range?
-> measuring value to low
Err.2
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.7 System error Return to manufacturer for repair

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8 Specification
Measuring ranges:
Display range: max. -1999...9999 digit, depending on connected sensor
Resolution: depending on connected sensor
Pressure units: mbar, bar, kPa, MPa, mmHg, PSI mH2O (only for devices with ‚m‘ printed below
display), selectable depending on connected sensor
Accuracy: (typ.) ±0,1%FS (at nominal temperature)
(FASt and P.dET: ±0.5%FS)
Measuring rate: 4 meas./sec
Nominal temperature: 25°C
Sensor: All sensors of the GMSD..-series without recalibration can be connected
Connection: Mini-DIN-Socket with locking mechanism
The sensor will automatically be detected, the measurement range settings are set
referring to sensor data
Power-Off-Function: Device will be automatically switched off if no key is pressed/no interface
communication takes place for the time of the power-off delay. The power-off delay
can be set to values between 1 and 120 min.; it can be completely deactivated.
Display: 2 four digit LCDs (12.4mm 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
Interface: Serial interface (3.5mm jack) can be connected to RS232 interface of a PC via
electrically isolated interface adapter GRS3100, GRS3105 or USB3100 (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: Slow measuring rate: < 1.5 mA
Low battery warning:
!
-display and ' bAt '
Housing: impact-resistant ABS, membrane keyboard, transparent panel, Front side IP65
Dimensions: 142 x 71 x 26 mm (L x W x D)
Working temperature: -25...+50°C
Allowable rel. humidity: 0...95 % RH (not condensing)
Storage temperature: -25...+70°C
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%
_
+

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9 Sensors (03/2005)
Type Measuring Range Resolution Overload Description
GMSD 2.5 MR -1.999 ... +2.500 mbar rel. 0.001 mbar 250 mbar rel. A
GMSD 25 MR -19.99 ... +25.00 mbar rel. 0.01 mbar 350 mbar rel. A
GMSD 350 MR -199.9 ... +350.0 mbar rel. 0.1 mbar 1 bar rel. A
GMSD 2 BR -1.000 ... +2.000 bar rel. 1 mbar 4 bar rel. A
GMSD 10 BR -1.00 ... +10.00 bar rel. 10 mbar 13.5 bar rel. A
GMSD 1.3 BA 0 ... 1300 mbar abs. 1 mbar 4 bar abs. A
GMSD 2 BA 0 ... 2000 mbar abs. 1 mbar 4 bar abs. A
GMSD 7 BA 0.00 ... 7.00 bar abs. 10 mbar 10 bar abs. A
GMSD 350 MRE 0.0 ... 350.0 mbar rel. 0.1 mbar 1.3 bar rel. B
GMSD 3.5 BRE 0 ... 3500 mbar rel. 1 mbar 7 bar abs. B
GMSD 1 BAE 0 ... 1000 mbar abs. 1 mbar 2 bar abs. B
GMSD 3.5 BAE 0 ... 3500 mbar abs. 1 mbar 7 bar abs. B
GMSD 7 BAE 0 ... 7000 mbar abs. 1 mbar 13.5 bar abs. B
GMSD 35 BAE 0.00 ... 35.00 bar abs. 10 mbar 58 bar abs. C
GMSD 70 BAE 0.00 ... 70.00 bar abs. 10 mbar 100 bar abs. C
GMSD 160 BAE 0.0 ... 160.0 bar abs. 0.1 bar 600 bar. abs. C
GMSD 250 BAE 0.0 ... 250.0 bar abs. 0.1 bar 600 bar. abs. C
GMSD 400 BAE 0.0 ... 400.0 bar abs. 0.1 bar 600 bar. abs. C
Description A: Sensor is suitable for air, non corrosive and non ionising gases and liquids
Pressure connection: 2 nylon pressure ports for connection to 6 x 1 mm tubes
Housing ABS with mounting eyelet, dimensions 68 x 32.5 x 27.5 mm
Description B: Stainless steel sensor. Suitable for aggressive media, water, etc.
Pressure connection: Threading G¼", for open ended spanner size: 27 mm
Housing ABS, dimensions ca. Ø26 (31) x 103 mm
Description C: Stainless steel sensor. Suitable for aggressive media, water, etc.
Pressure connection: Threading G¼", for open ended spanner size: 27mm
Steel housing, dimensions ca. Ø26 (31) x 110 mm
10 Accessories
GKK3000 Suitcase (275 x 229 x 83 mm) with punched lining suitable for the GMH3xxx-series.
GKK3100 Suitcase
(275 x 229 x 83 mm) with foam lining for universal applications.
GMH1300 Magnet holder
GAK9V Rechargeable accu 9V
GLG1300 Accu charger for recharging 2 accus at one time
GNG10/3000 power supply 10V/10mA
GRS3100 Interface converter, electrically isolated
GRS3105 5-way interface converter, electrically isolated
GAM3000 Control device for GMH3xxx-devices with alarm function
EBS9M 9-channel software to display the measuring values
GMH3000.DLL universally applicable windows functions library ('GMH3000.DLL') with documentation for
your own software applications