Dräger X-am 2500 Instrucciones De Uso página 24

Operation
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 of
the respective DrägerSensors.
1. Connect the test gas cylinder with the calibration cradle.
2. 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).
CAUTION
!
Never inhale the test gas. Health hazard!
Observe the hazard warnings of the relevant Safety Data
Sheets.
3. Switch on the instrument and insert it into the calibration cradle.
4. Press the [+]-key and keep it pressed for 5 seconds to open the
calibration menu, enter the password (password on delivery = 001).
5. Use the [+]-key to select the single gas calibration function.
The symbol for span calibration
6. Press the OK-key to start the channel selection.
The display flashes the gas of the first measuring channel,
e. g. ch4 - %LEL.
7. Press the OK-key to start the calibration function of this measuring
channel, or use the [+]-key to select another measuring channel
(O - vol. %, H S - ppm or CO - ppm, etc.).
2 2
The calibration gas concentration is displayed.
8. Press the OK-key to confirm the calibration gas concentration or
use the [+]-key to change the calibration gas concentration and
complete the process by pressing the OK-key.
The measurement value flashes.
24
flashes.
9. 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):
a. Press the OK-key to carry out the calibration.
The display containing the current gas concentration changes
with the display OK.
b. Press the OK-key or wait for approx. 5 seconds to end the
calibration/adjustment of this measuring channel.
Potentially, the next measuring channel will be offered for
calibration.
After the calibration/adjustment of the last measuring channel,
the instrument changes to the measuring mode.
c. Close the test gas cylinder valve and remove the instrument
from the calibration cradle.
If a fault occurred during the span calibration/adjustment:
The fault message appears and

respective sensor instead of the measured value.
In this case, repeat the calibration/adjustment.

If necessary, change the sensor.

Notice for the adjustment of the ex-channel to nonane as
a measuring gas:
During the calibration of the ex-channel, propane can be used as

a substitute calibration 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 the use in subsurface mining:
For the adjustment 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 used.
is displayed for the
Dräger X-am 2500