Greisinger GMH 3695 User guide

As of Version 1.0 Operating Manual GMH 3695

Oxygen Meter for oxygen in gases

with integrated temperature and pressure measuring

Please keep for future reference!

WEEE-Reg.-Nr. DE 93889386

H74.0.15.6C-04

GHM Messtechnik GmbH • Standort Greisinger

Hans-Sachs-Str. 26 • D-93128 Regenstauf

 +49 (0) 9402 / 9383-0  +49 (0) 9402 / 9383-33  [e-mail]

H74.0.15.6C-04 Operating Manual GMH 3695 page 2 of 16

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Contents

1 GENERAL NOTE ...................................................................................................................................................... 2

2 DESIGNATED USE ................................................................................................................................................... 3

3 SAFETY ...................................................................................................................................................................... 3

3.1 SAFETY SIGNS AND SYMBOLS ................................................................................................................................ 3

3.2 SAFETY GUIDELINES .............................................................................................................................................. 3

4 PRODUCT DESCRIPTION ...................................................................................................................................... 4

4.1 SCOPE OF SUPPLY .................................................................................................................................................. 4

4.2 OPERATION AND MAINTENANCE ADVICE .............................................................................................................. 4

4.3 START OF OPERATION ........................................................................................................................................... 4

4.4 CONNECTIONS ....................................................................................................................................................... 5

4.5 DISPLAY ELEMENTS ............................................................................................................................................... 5

4.6 PUSHBUTTONS ....................................................................................................................................................... 5

4.7 POP-UP CLIP ........................................................................................................................................................... 6

5 CONFIGURATION ................................................................................................................................................... 7

6 OXYGEN MEASURING IN GASES- PLEASE NOTE ......................................................................................... 8

6.1 CHOICE OF SENSING ELEMENTS# .......................................................................................................................... 9

6.2 APPLICATION OF THE DIFFERENT SENSOR TYPES GGO ..., GOO ... AND GGA ..................................................... 9

7 CALIBRATION OF THE SENSOR....................................................................................................................... 10

7.1 ONE POINT CALIBRATION ('(AL 1-PT') ................................................................................................................. 10

7.2 2 / 3-POINT CALIBRATION ('(AL 2-PT, (AL 3-PT') ................................................................................................ 10

7.3 EVALUATION OF SENSOR STATE (ELE[) .............................................................................................................. 10

8 OPERATION OF THE LOGGER ......................................................................................................................... 11

8.1 „FUNC-STOR“: STORING SINGLE MEASUREMENT SETS ...................................................................................... 11

8.2 „FUNC-CYCL“: AUTOMATIC RECORDING WITH SELECTABLE LOGGER-CYCLE-TIME ..................................... 12

9 INSPECTION OF THE ACCURACY / ADJUSTMENT SERVICES ................................................................ 12

10 OUTPUT ................................................................................................................................................................ 13

10.1 INTERFACE - BASE ADDRESS ('ADR.') .............................................................................................................. 13

10.2 ANALOGUE OUTPUT – SCALING WITH DAC.0 AND DAC.1 ............................................................................ 13

11 GLP ........................................................................................................................................................................ 14

11.1 CALIBRATION INTERVAL ([.INT) ....................................................................................................................... 14

11.2 CALIBRATION STORAGE (READ CAL) ............................................................................................................. 14

12 ALARM („AL.“) ................................................................................................................................................... 14

13 REAL TIME CLOCK („CLOC“) ....................................................................................................................... 14

14 ERROR AND SYSTEM MESSAGES ................................................................................................................ 15

15 SPECIFICATION ................................................................................................................................................. 16

16 RESHIPMENT AND DISPOSAL ....................................................................................................................... 16

1 General Note

Read this document carefully and get used to the operation of the device before you use it. Keep this
document within reach for consulting in case of doubt.

If the device is stored at temperatures above 50°C the battery has to be removed from the device.

NOTE: We recommend taking out battery if device is not used for a longer period of time.

Risk of leakage!

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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.

DANGER

DANGER

DANGER

2 Designated Use

The GMH 3695 is measuring oxygen in air and gas mixtures either as partial pressure or as concentration in
%vol.
For the measuring an external sensor of the type GOO-... or GGO... has to be connected to the MINI-DIN­socket.
Due to the properties of the sensor, it has to be calibrated regularly (e.g. at fresh air = 20.95%) 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 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.

3 Safety

3.1 Safety signs and symbols

Warnings are labeled in this document with the followings signs:

3.2 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. In
such case make sure the device temperature has adjusted to the ambient before trying a new start-up.

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. 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.

4. 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.

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4 Product Description

4.1 Scope of supply

The scope of supply includes:

 GMH 3695 with 9V-battery
 Operating manual

The necessary oxygen sensor is chosen separately due to application.

4.2 Operation and maintenance advice

1. Battery operation
If and ‘bAt’ are 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.

4.3 Start of Operation

Switch the device on with the key “ON OFF”. The instrument is performing a self diagnosis, during this time
all display segment are shown.

Afterwards the instrument signals, if it was user adjusted („[ORR“)
The device starts measurement afterwards.

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1.

Output: Operation as interface for t he connection of

galvanically isolated adapters (accessories: GRS
3100, USB 3100)
Operation as analogue output: connection via
suitable analogue cable
Attention: The mode of operation has to be
configured (p.r.t Chapter 5) and influences the power
consumption.

2.

Sensor connection MiniDIN

3.

Pressure Port: Tube Connection for ambient pressure compensation of oxygen Sensor

4.

Power supply: d.c. connector (internal pin Ø 1.9 mm) for external 10.5-12V direct voltage supply

1 = Main Display:

Possible displays:

 Oxygen concentration in % (% O2 Vol)
 Oxygen partial pressure (hPa or mmHg)

(change with -key)

2 = secondary
display:

Display of sensor temperature or absolute
pressure (alternating, please refer to Chapter

5. LcD.2)

Special elements:

3 = MIN/MAX/HLD:

Shows, if minimum/maximum/
memorized measuring value is in display

4 = ok-arrow:

Signals, if oxygen and temperature values
are stable

5 = CAL- arrow:

Signals, if automatic calibration is in
progress

6 = Logg - arrow

Shows, if logger function is chosen.
Is blinking, if cyclic logger is running

7 = Warning sign:

Signals weak battery or other warning
message

Die restlichen Pfeile haben in dieser Gerätevariante keine Funktion

On / off key

Set/Menü

Press 2 sec.: (Menu): call configuration menu
Press shortly: Change the oxygen display unit
(please refer to chapter 5)

+

min/max when taking measurements:

press shortly: min. or max. measured oxygen value and

referring temperature and pressure values
will be displayed

press for 2 sec.: the min. or max. value will be deleted

Configuration: to enter values, or change settings

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
or if logger activated: calling the logger functions (refer to chapter 8)

- Set/Menu: confirm settings, return to measuring

CAL:
press shortly: display of sensor state rating
press for 2 sec: start sensor calibration

4.4 Connections

4.5 Display elements

4.6 Pushbuttons