GHM Greisinger GMH 5690 User manual

H84.0.14.6C-03
GHM GROUP - Greisinger
GHM Messtechnik GmbH | Hans-Sachs-Str. 26 | 93128 Regenstauf | GERMANY
Tel.: [phone] | [email protected] | www.greisinger.de
Operating manual
Water-Proof oxygen meter for oxygen in gases
with integr. temperature & pressure measuring
As of version 1. 0
GMH 5690

Please carefully read these instructions before use!
WEEE-Reg.-Nr. DE 93889386

Please consider the safety instructions!

Please keep for future reference!

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Contents
1SAFETY......................................................................................................................................................................3
1.1 GENERAL NOTE......................................................................................................................................................3
1.2 INTENDED USE.......................................................................................................................................................3
1.3 QUALIFIED STAFF ..................................................................................................................................................3
1.4 SAFETY SIGNS AND SYMBOLS................................................................................................................................3
1.5 REASONABLY FORESEEABLE MISUSE ....................................................................................................................4
1.6 SAFETY GUIDELINES..............................................................................................................................................4
2PRODUCT DESCRIPTION......................................................................................................................................4
2.1 SCOPE OF SUPPLY ..................................................................................................................................................4
2.2 OPERATION AND MAINTENANCE ADVICE..............................................................................................................5
3START OF OPERATION.........................................................................................................................................5
4OPERATION..............................................................................................................................................................5
4.1 DISPLAY ELEMENTS...............................................................................................................................................5
4.2 PUSHBUTTONS.......................................................................................................................................................6
4.3 CONNECTIONS .......................................................................................................................................................6
4.4 POP-UP CLIP...........................................................................................................................................................7
5CONFIGURATION...................................................................................................................................................8
6THE OXYGEN SENSOR..........................................................................................................................................9
6.1 GENERAL NOTES ABOUT THE OXYGEN SENSOR.....................................................................................................9
6.1.1 Life time .........................................................................................................................................................9
6.1.2 Mounting /operation position.......................................................................................................................10
6.1.3 Measuring precision ....................................................................................................................................10
6.2 SENSOR ELEMENTS..............................................................................................................................................10
6.2.1 GOEL 370 acidic electrolyte........................................................................................................................10
6.2.2 GOEL 381 basic electrolyte.........................................................................................................................10
7OXYGEN MEASURING IN GASES- PLEASE NOTE.......................................................................................11
7.1 APPLICATION OF THE DIFFERENT SENSOR TYPES ................................................................................................11
7.1.1 GGO housing (closed sensor)......................................................................................................................11
7.1.2 GOO housing (open sensor) ........................................................................................................................11
8EXCHANGING THE SENSOR ELEMENT.........................................................................................................11
9CALIBRATION OF THE OXYGEN SENSOR....................................................................................................12
9.1 ONE POINT CALIBRATION “(AL. 1-PT“.................................................................................................................12
9.2 2/3- POINT CALIBRATION ”(AL 2-PT“,”(AL 3-PT“..........................................................................................12
9.3 EVALUATION OF SENSOR STATE “ELE[“..............................................................................................................13
9.4 CALIBRATION/ADJUSTMENT INTERVAL “[INT“...................................................................................................13
10 ADJUSTMENT OF TEMPERATURE INPUT.................................................................................................13
11 ALARM “AL.“........................................................................................................................................................13
12 UNIVERSAL OUTPUT .......................................................................................................................................14
12.1 INTERFACE.......................................................................................................................................................14
12.1.1 Supported interface-functions:.....................................................................................................................14
13 INSPECTION OF THE ACCURACY/ ADJUSTMENTS AERVICES ..........................................................15
14 BATTERY CHANGE...........................................................................................................................................15
15 ERROR AND SYSTEM MESSAGES................................................................................................................16
16 RESHIPMENT AND DISPOSAL.......................................................................................................................17
16.1 RESHIPMENT ....................................................................................................................................................17
16.2 DISPOSAL.........................................................................................................................................................17
17 SPECIFICATION.................................................................................................................................................17

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1 Safety
1.1 General note
Read this document attentively and make yourself familiar to the operation of the device before you use it.
Keep this document in a ready-to-hand way in order to be able to look up in the 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.
1.2 Intended use
The instrument is measuring oxygen in air and gas mixtures either as partial pressure or as concentration in
% Vol. O2.
For the measuring an external sensor of the type GOO-... or GGO... is necessary.
The measuring take place at the extern opening Sensor.
Due to the properties of the sensor, it has to be calibrated regularly (e.g. at fresh air = 20.95 % Vol. O2) to get
precise values. If the sensor is used up, this will be detected during the calibration, the sensor has to be
regenerated or replaced before continuing with measuring.
The sensor has to be connected to the 7-pole bayonet socket.
The safety requirements (see below) have to be observed.
The device must be used only according to its intended purpose and under suitable conditions.
1.3 Qualified staff
All instructions have to be well understood and complied with. To be sure that there is no risk arising due to
misinterpretation of measured values, the operator must have further knowledge in case of doubt - the user
is liable for any harm/damage resulting from misinterpretation due to insufficient knowledge.
1.4 Safety signs and symbols
Warning notices are marked in this manual as shown below:
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 points out processes, which can indirectly influence operation or
provoke unforeseen reactions at non-observance.
As of version 1. 0
GMH 5690

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1.5 Reasonably foreseeable misuse
This device must not be used at potentially explosive areas!
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.
This device must not be used at a patient for diagnostic or other medical purpose.
1.6 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.
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 17 Specification.
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.
Internal connections of other devices (e.g. from ground with protective earth) may lead to
prohibited voltage levels that could disturb the function, damage or even destruct the
device or any connected equipment.
2 Product description
2.1 Scope of supply
The scope of supply includes:
Handheld instrument GMH 5695 with 2 AAA-Batteries
(oxygen sensor usually is ordered separately. For choice please refer to chapter 6 The oxygen
sensor)
Operating manual
Short form manual
Calibration protocol
Silicone protective cover

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2.2 Operation and maintenance advice
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. Battery change see chapter 14 Battery change.
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.
After recommissioning, the real-time clock has to be set again.
Use device and sensor carefully and according to its technical data (do not throw it,
strike it, etc.). Protect the device from dirt.
USB or mains operation:
When connecting a mains cable or USB interface cable, please take care to connect only
allowed components.
The output voltage of a connected power supply unit has to be between 4.5 and 5.5 V
DC. Do not apply overvoltage!
We recommend operation with interface cable USB 5100. Then device is supplied by the
USB interface of the connected PC or USB power supply adapter.
3 Start of operation
Connect sensor, switch instrument on with ….
After the segment test the instrument shows “[ORR“shortly, if it was user adjusted.
The device starts measurement afterwards.
4 Operation
4.1 Display elements
1
Main display:
Oxygen concentration in % (% Vol. O2) or
Oxygen partial pressure (hPa or. mmHg)
Choice via - key
2
Secondary display:
sensor temperature or absolute pressure, (alternating,
please refer to chapter 5 Configuration ”LCD.2“
3
Main display units
4
State of battery
5
Shows, if minimum/maximum/
memorized measuring value is in display
6
Arrow ”ok“: Measured value is stable
7
Arrow “CAL“: Calibration
8
Arrow “hPa“: Pressure unit of internal sensor

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4.2 Pushbuttons
On / off key, backlight
“press shortly“:
Activate backlight or switch on instrument
”press longer“:
Switch off instrument
Set/Menü
”press for 2 sec“ (menu):
Invoke configuration menu
”press shortly“:
Change oxygen display unit
+
min / max
”press shortly“:
Min. or max. value is displayed
”press for 2 sec“:
The corresponding value is deleted
Configuration
See chapter 5 Configuration:
Confirm settings, return to measuring
Store/Enter
”Measuring“:
with Auto-Hold off:
Hold and save current measuring value, (‘HLD’ is displayed)
with Auto-Hold on:
Start new measuring, It is finished , when “HLD’ shows in
display please refer to chapter 5 Configuration.
Configuration
See chapter 5 Configuration:
Confirm settings, return to measuring
[AL:
”press shortly“:
Shown the sensor state of the last calibration
”press for 2 sec“:
Start of the oxygen calibration
4.3 Connections
Universal output
Interface, supply, analog output see chapter 12
Universal output
7-pole bayonet socket
Connection for sensor and temperature probe

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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

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5 Configuration
To change device’s settings, press for 2 seconds. This will activate the configuration menu (main display
“SET“). Pressing changes between the menus points, pressing jumps to the referring parameters,
which can be selected with ).
The parameter value can be changed with or. . Pressing again jumps back to the main
configuration menu and saves the settings. Pressing finishes the configuration.
Pressing and at the same time for more than 2 seconds will reset the device to
factory defaults.
If no key is pressed for more than 2 minutes the configuration will be aborted. All
changes will be discarded!
Menu
Parameter
Value
Description
or
see
SET
(ONF
Set Configuration: General configuration
9
[H 2
P 02 hPa
Oxygen partial pressure display in hPa
*
P 02 mmHg
Oxygen partial pressure display in mmHg
RES
K,
Best O2resolution
LO
Low O2resolution, calm value display (standard)
LCD.2
T
Secondary display always temperature
P
Secondary display always absolute pressure
P T
Secondary display alternates between temperature and abs.
pressure
U N,T
T
°C
All temperatures in degree Celsius (ex works setting)
°F
All temperatures in degree Fahrenheit
[AL.P
1-PT
Simple one point calibration at air
2-PT /3-PT
2 or 3- calibration at air, or in oxygen or in nitrogen / zero gas
[. INT
1 …365
Calibration reminder period (in days)
OFF
No calibration reminder
A VTO
HLD
ON
Auto stable value determining freezing
OFF
Standard hold function on key press
P.OFF
1 …120
Power-off delay in minutes. Device will be automatically switched
off as soon as this time has elapsed if no key is pressed/no
interface communication takes place. (ex works setting 20min)
OFF
Automatic power-off function deactivated (continuous operation)
L,TE
OFF
Backlight deactivated
5...120
Turn off backlight after 5… 120 s (factory settings: 10 s)
ON
Backlight always on
0V T
OFF
Interface off -> minimal power consumption
SER
Serial interface activated (ex works setting)
DA[
Analog output activated
ADR
0 1,1 1,2 1,…9 1
Base address for serial interface communication (ex works
setting 01)

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SET
(ORR
Set Corr: Input adjustment
**
9.4
0FFS
°C bzw. °F
-5.0 °C... 5.0 °C
or
-9.0 °F ... 9.0 °F
The zero point of the temperature measuring is shifted for the
entered value. This can be used to compensate sensor and
instrument deviations
**
OFF
No zero adjustment for temperature measurement (=0.0°)
S[AL
°C bzw. °F
-5.00 ... 5.00 %
The slope of the temperature measurement is corrected by this
value.
This can be used to compensate sensor and instrument
deviations
**
OFF
No slope adjustment for temperature measurement (=0.00)
0FFS
hPa
-20 ... 20 hPa
The zero point of the pressure measuring is shifted for the
entered value.
This can be used to compensate sensor deviations
**
OFF
No zero adjustment for pressure measurement (=0 hPa)
SET
AL
Set Alarm: Configuration of the alarm settings
11
AL. 1
ON /NO.SO
Monitoring oxygen: Alarm on with buzzer / Alarm on without
buzzer
OFF
No alarm monitoring for oxygen
AL.,N
[ONC
Monitoring oxygen: Concentration in % Vol O2
P. 02
Monitoring oxygen: Partial pressure in hPa or mmHg
A 1.LO
e.g. 0.0...100.0
%
Min alarm limit oxygen (not if AL. 1. oFF)
A 1.H,
e.g 0.0...100.0
%
Max alarm limit oxygen (not if AL. 1. oFF)
AL. 2
ON /NO.SO
Temperature monitoring : Alarm on with buzzer / Alarm on
without buzzer
OFF
No alarm monitoring for temperature
A2.LO
-5.0 ... +50.0 °C
Min alarm limit temperature (not if AL. 2. oFF)
A2.H,
-5.0 ... +50.0 °C
Max alarm limit temperature (not if AL. 2. oFF)
6 The oxygen sensor
6.1 General notes about the oxygen sensor
6.1.1 Life time
At the end of the life time, the signal of the sensor is dropping rapidly. The sensor evaluation in % therefore
can only be taken as a relative measure. An evaluation of 70% does not mean that 70% of life time is left, but
that the electrode signal has 70% of an optimal state reference.
The nominal life time may be reduced due to the application. Negative effects are:
Extreme storage and operation temperature.
Humidity of measured gas: If permanently used with dry gases (technical gases, bottled gas) the lifetime
decreases considerably.
The sensor state evaluation will be stored after a successful calibration of the oxygen
sensor.

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6.1.2 Mounting /operation position
The optimum position for the sensor membrane is to point downwards.
If sensor is screwd in pressure.tight into an application wichs pressure differs from the
ambient pressure, the maximum differential pressure at the sensor membrane is 250 bar.
6.1.3 Measuring precision
The precision can be influenced due to:
Liquids at the sensor inlet. Rinse the inlet and dry with lint-free cloth.
Avoid liquids of any kind at the contacts.
Gas and sensor temperature have to be at same level. Best precision, when calibrated at measuring
temperature.
Pressure fluctuations: The sensor is originally a partial pressure sensor, i.e. changes in the absolute
pressure are influencing the measuring result directly proportional. A pressure change of 1% will cause a
additional measuring error of 1%!
For optimum precision calibrate at the same conditions at which you want to measure.
6.2 Sensor elements
Unsuitable for underwater-diving-application e.g. Rebreather.
6.2.1 GOEL 370 acidic electrolyte
Integrated in GGO 570, GGA 570, GOO 570.
Recommended application areas 0...35 Vol. % O2(above, the measuring accuracy
is reduced).
Also suitable for gases with high CO2-proportion or for CO2-gas. The effect of the
acidic electrolyte is that the sensor is resistant against the CO2-gas and still hold the
stability.
6.2.2 GOEL 381 basic electrolyte
Short-time exposition of up to 10% CO2is not problematic (for example 15 minutes.
up to 10 times per day) for the GOEL 380 (e.g. exhaust measuring). If there is
measured more often with elevated CO2-concentration or at CO2-concentrations
above 10%, the exposition time has to be kept as short as possible and sufficient
measuring breaks should be made.
If the sensor is not exposed to free air during measuring pauses, the connected
tubes etc. have to be flushed with clean air or nitrogen.
Integrated in GGO 581, GGA 581, GOO 581.
Recommended application areas 0...100 Vol. % O2.
Preferred of measurements with extremely small oxygen content (e.g. < 0.3 Vol. %
O2), e.g. protective atmosphere, or more than 35 % Vol O2.
For gases without larger CO2 concentration