User manual

H74.0.14.6C-05 Operating Manual GMH 3692 page 10 of 12
7.4 Calibration Interval ([.INT)
You can enter the interval after which the device reminds you to recalibrate in the configuration.
The interval times should be chosen according to the application and the stability of the sensor.
“CAL” flashes on the display as soon as the interval has expired.
8 Inspection of the accuracy / Adjustment Services
The instrument can be sent to the manufacturer for adjustment and function test.
Only the manufacturer can check all systems on correct them if necessary.
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.
(please specify references, e.g. 20.9 and 100%).
If the instrument is certified with its sensor, this proves for example the linearity of the measuring chain,
regular recalibration by the user is still necessary!
9 Serial Interface
With an electrically isolated interface converter USB3100, GRS3100 or GRS3105 (accessory) the device can
be connected to a PC.
With the GRS3105 it is possible to connect up to 5 instruments of the GMH3000 family to a single interface
(please also refer to GRS3105-manual). 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 5).
In order to avoid transmission errors, there are several security checks implemented (e.g. CRC).
The following standard software packages are available for data transfer:
 GSOFT3050: Operating and evaluation software for instruments with integrated logger function
 EBS20M/ -60M: 20- / 60-channel software to record and display the measuring values
 GMHKonfig: Software for a comfortable configuration of the device (e.g. freeware)
In case you want to develop your own software we offer a GMH3000-development package including
- an universally applicable 32bit Windows functions library ('GMH3000.DLL') with documentation that can
be used by all 'serious' programming languages.
- Programming examples for Visual Studio 2010 (C#, C++), Visual Basic 6.0™, Delphi 1.0™, Testpoint™,
Labview™
The Device has 4 Channels:
- oxygen concentration % Vol
- oxygen partial pressure in hPa or mmHg
- temperature value at the time of recording in °C or °F
- absolute pressure in hPa abs or mmHg abs
Supported Interface-functions:
1
2
3
4
Code
Name/Function
1
2
3
4
Code
Name/Function
x
x
x
x
0
read nominal value
x
x
x
x
199
read measuring type in display
x
x
x
x
3
read system status
x
x
x
x
200
read min. display range
x
12
read ID-no.
x
x
x
x
201
read max. display range
x
x
x
22
read min alarm limit
x
x
x
x
202
read unit of display
x
x
x
23
read max alarm limit
x
x
x
x
204
read decimal point of display
x
x
x
x
176
read min measuring range
x
208
read channel count
x
x
x
x
177
read max measuring range
x
222
read turn-off-delay
x
x
x
x
178
read measuring range unit
x
223
Set turn-off-delay
x
x
x
x
179
read measuring range decimal point
x
240
Reset
x
x
x
x
180
read measuring type
x
254
read program identification
The measuring and range values read via interface are always in the selected display unit!
10 Alarm („AL.“)
There are three possible settings:
Alarm off (AL. oFF), on with buzzer (AL. on), on without buzzer (AL. no.So).
Following conditions will display an alarm, when the function is activated (on or no.So):
- Value is below lower (AL. Lo) or above upper alarm rail (AL.Hi).
- Sensor error
- Low battery (bAt)
- Err.7: System error (always with buzzer)
In case of an alarm and when polling the interface the “prio”-flag is set in the returned message.