Dräger X-am 5000 Instrucciones De Uso página 17

– The display containing the current gas concentration changes with the
display » OK «.
 Press the [OK] key to exit the calibration function or wait for approx. 5 seconds.
If a fault has occurred during the fresh air calibration:
– The fault message » « appears and »
respective sensor instead of the measured value.
 In this case, repeat the fresh air calibration. If necessary, have the sensor
replaced by qualified personnel.
Calibrating/adjusting the sensitivity for an individual
measuring channel
– The span calibration can be carried out selectively for individual sensors.
– During the span calibration, the sensitivity of the selected sensor is set to the
value of the test gas used.
– Use a standard test gas.
Allowed test gas concentration:
Ex: 40 to 100 %LEL
O 10 to 25 vol. %
2
CO: 20 to 999 ppm
H S: 5 to 99 ppm
2
Test gas concentrations of other gases: see Instructions for Use for the
respective DrägerSensors.
 Connect the test gas cylinder with the calibration cradle.
 Vent the test gas into a fume cupboard or into the open air (with a hose
connected to the second connector of the calibration cradle).
Never inhale the test gas. Health hazard!
Observe the hazard warnings of the relevant Safety Data Sheets.
 Switch on the instrument and insert it into the calibration cradle.
 Press the [ + ] key and keep it pressed for 5 seconds to open the calibration
menu, enter the password (password on delivery = 001).
 Use the [ + ] key to select the single gas calibration function. The symbol for
span calibration » « flashes.
 Press the [OK] key to start the channel selection.
– The flashing display shows the gas of the first measuring channel,
e.g. » ch4 - %LEL «.
« is displayed for the
CAUTION
 Press the [OK] key to start the calibration function of this measuring channel,
or use the [ + ] key to select another measuring channel (O
CO - ppm, etc.).
– The test gas concentration is displayed
 Press the [OK] key to confirm the test gas concentration or use the [ + ] key
to change the test gas concentration and complete the process by pressing
the [OK] key.
– The measurement value flashes.
 Open the test gas cylinder valve to let gas flow over the sensor with a volume
flow of 0.5 l/min.
– The displayed, flashing measurement value changes to the value according
to the supplied test gas.
When the displayed measurement value is stable (after at least 120 seconds):
 Press the [OK] key to perform the calibration.
– The display containing the current gas concentration changes with the
display » OK «.
 Press the [OK] key or wait for approx. 5 seconds to end the calibration of this
measuring channel.
– The next measuring channel may appear for calibration.
– After the calibration of the last measuring channel, the instrument changes to
measuring mode.
 Close the test gas cylinder valve and remove the instrument from the
calibration cradle.
If a fault occurred during the span calibration:
– The fault message » « appears and »
respective sensor instead of the measured value.
 In this case, repeat the calibration.
 If necessary, replace the sensor.
Notice for the adjustment of the ex-channel to nonane as a measuring gas:
– When calibrating the Ex channel, propane can be used as a substitute for
the test gas.
– When using propane to adjust the ex-channel to nonane, the display must
be set to twice the used test gas concentration.
Notice for use in underground mining:
– When calibrating the Ex channel to methane as the measured gas,
the indication on the instrument must be set to a value 5 % (relative) higher
than the test gas concentration used.
- vol. %, H S - ppm,
2 2
« is displayed for the
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