Calibration; Replacing The Sensor Head; Error Messages - Herth+Buss SelectH2 Instrucciones De Manejo

Operating Instruction
Left button:
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.
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3

Calibration

We recommend that you send the device to
the manufacturer or to qualified specialist
personnel once a year for checking and re-
calibration.
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.
95980002
18