Adjusting The Sensitivity For An Individual Measuring Channel - Dräger X-am 5000 Instrucciones De Uso

 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.

Adjusting the sensitivity for an individual measuring channel

– The span calibration can be carried out selectively for individual sensors.
– In the case of 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
NO 5 to 99 ppm
2
Test gas concentrations of other gases: see Instructions for Use of 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 adjustment function. The symbol for
span calibration » « flashes.
 Press the [OK] key to start the channel selection.
– The display flashes the gas of the first measuring channel, e.g. » ch4 - %LEL «.
 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.
24
« is displayed for the
CAUTION
- Vol.-%, H S - ppm,
2 2
 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 adjustment of this
measuring channel.
– The next measuring channel is displayed for adjustment if necessary.
– After the adjustment of the last measuring channel, the instrument changes
to the measuring mode.
 Close the test gas cylinder valve and remove the instrument from the
calibration cradle.
If a fault has occurred during the span calibration:
– The fault message » « appears and »
respective sensor instead of the measured value.
 In this case, repeat the calibration.
 Change the sensor if necessary.
Notice for the use in subsurface mining:
– For the calibration of the ex-channel to the measuring gas methane, the
display of the instrument must be set to a value of 5 % (relative) higher than
the test gas concentration.
Automatic fresh air calibration in the charging cradle (CatEx sensor only):
Calibrate the gas detector to fresh air, free of measured gases or other
interfering gases. If the function is selected, a fresh air calibration of the CatEx
sensor is performed automatically as soon as the gas detector is inserted in the
charging cradle.
This function can be selected or disabled using the CC-Vision PC software.
No calibration takes place if the warm-up is not yet complete:
 Alarm LED is illuminated red.
 The acoustic signal sounds twice followed by three short tones and the gas
detector switches off.
« is displayed for the