Calibration; Replacing The Sensor Head; Error Messages; Error Codes - Herth+Buss SelectH2 Bedienhinweis

Operating Instruction
Left button:
EN
1st function level:
Shows the currently set gas type H2
2nd function level:
Normalises concentration output to under-
ground concentration (switch between ab-
solute and relative measurement)
In the 2nd function level, the concentration
output is normalised to the current concen-
tration. However, a maximum of 250 ppm
can be suppressed. The special segment SET
appears in the display.
Lower button:
Switches the device on and off.
www.herthundbuss.com

3. Calibration

We recommend that you send the device
to the manufacturer or to qualified special-
ist personnel once a year for checking and
recalibration.

4. Replacing the sensor head

A specific sensor head has been assigned to
each device for calibration before delivery.
Recalibration is required when replacing the
sensor head, e.g. when retrofitting with a re-
placement sensor.

5. Error messages

In the event of battery undervoltage, the spe-
cial symbol (battery) appears in the display
and the "operation" LED flashes. The device
can still be used for at least
15 minutes when in this operating condition.
The device checks the plausibility of the sen-
sor values, both in measuring mode and in
calibration mode. In addition, the parameter
memory is tested for data validity each time
the device is switched on. If errors are de-
tected, the relevant error code is shown in
the display.
Operating Instruction

5.1 Error codes

ERR P Gas flow malfunction
E 32 Calibration data error
E 64 Sensor failure
E 128 Parameter memory faulty
E 192 Parameter memory faulty and
sensor failure

6. Charging the battery

The device must be switched off for charg-
ing. The battery is charged within 12 to 14
hours using the plug-in power supply pro-
vided (maximum charging current 150 mA).
The red LED on the indicates the charging
procedure and is illuminated permanently
when charging. Charging should take place
in a temperature range from 0 to 45°C. Over
500 charge and discharge cycles can be ex-
pected under normal conditions. Long pe-
riods of storage or charging the battery for
too long reduce the cell capacity. This capac-
ity loss can be compensated for by means of
a full charge or 1 to 3 charge and discharge
cycles.
7. Device-related requirements in
accordance with DVWG G 465-
4 and technical data
7.1 General device-related requirement in
accordance with DVGW G 465-4
This DVGW regulation affects mobile devices
for determining leaks on systems for public
gas supply as well as on client's own systems
(in-house installations). Here, the term "gas
detector" refers to devices for detecting gas
concentrations with a detection sensitivity of
18 19
< 100 ppm combustible gas, i.e. devices that
are preferably used for gas detection when
looking for leaks. The required device proper-
ties should be specified in the manufacturer's
operating manual where relevant.
8. Leak detection on the
A/C system
During leak detection on the A/C system, the
parts provided (service coupling, hose, pres-
sure reducer, gas cylinder) are connected to
the system.
Screw the pressure reducer to the
gas cylinder by hand;
Insert the service coupling on the filling
connector;
Open the gas cylinder valve slowly and
fill the A/C system with forming gas 95/5.
The filling pressure is approx. 5 bar.
Start the engine briefly and use the
SelectH to start locating the leak, once
2
the leak has been found and the system
has been made leak-tight, we recom-
mend that you evacuate the system again
before filling with oil and coolant. Always
remember to observe the filling quan-
tity specified by the manufacturer when
refilling! The test gas (forming gas 95/5)
is completely harmless for humans and
materials.
WARNING
Observe the safety regulations when
handling the gas bottle - see the label
on the gas bottle.
EN