H69.0.21.6C-03
Operating Manual GCO 100
page 11 of 12
10 System messages
Er. 1 =
measuring range has been exceeded, measured value is to high
Er. 2 =
measuring range is undershot, measured value is to low
--
=
Sensor error: Value could not be calculated
Er. 7 =
System fault - the device has detected a system fault (defective or far outside
allowable ambient temperature range)
If
"BAT"
is displayed at the left side of display, the battery is weak, measuring can be continued
for a short period.
If
“bAt”
is displayed in the main display the battery is used up and needs to be replaced.
Measuring is no more possible.
11 The serial interface
11.1 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 7).
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™,
Windows 8/8.1™, Windows 10™
•
Programming examples Visua
l Basic 4.0™, Delphi 1.0™
The device has 2 channels:
Channel 1: CO-concentration
[ppm], [mg/m³] or [%COHb]
Channel 2: temperature (nearly)
[°C]
Note:
The measuring-/ alarm- and display range values read back from the interface
are always in the selected measurement unit!
11.2 Supported interface functions
Code name/function
code
name/function
code name/function
0
Read measurement value
178
Read measuring range unit
204
Read display decimal point
3
Read system state
179
Read meas. range decimal
point
208
Read number of channels
7
Read max. measured value
180
Read kind of measuring or
sensor
222
Read power-off time
12
Read ID number
199
Read kind of measuring or
display
223
Set power-off time
23
Read max alarm limit
200
Read min. display range
240
Reset
176
Read min. measuring range
201
Read max. display range
254
Read Program version
177
Read max. measuring range 202
Read display unit
Note for operation with GAM3000:
Keep in mind that the instrument just support max-, not min-alarm !
Therefore the control-output of the GAM3000 could not be used, just the alarm output!
