Dräger X-am 1100 Notice D'utilisation page 10

Instrument test with gas
(Bump Test)
Prepare the test gas cylinder. A gas flow of 0.5 L/min
is required. The test gas concentration shall above the
A1 alarm limits.
Connect the hose from the gas cylinder to the calibra-
tion cradle (order no. 83 18 752).
Attention
Do not inhale test gas. Danger to health!
Observe the hazard warnings of the relevant
safety data sheets.
Switch on the instrument.
Place the instrument in the calibration cradle and push
it down, until it clicks in.
Open the vent of the test gas cylinder to apply gas to
the instrument.
Wait until the device displays the test gas concentrati-
on with sufficient tolerance –
1)
Ex: 40 %LEL ... 74 %LEL
1)
O : 17.4 vol. % ... 18.6 vol. %
2
1)
H S: 12 ppm ... 18 ppm
2
1)
CO: 40 ppm ... 60 ppm.
Depending on the applied gas concentration, the in-
strument shows the gas readings alternating with
» A1 « or » A2 «.
Close the vent of the test gas cylinder.
Take the instrument out of the calibration cradle.
If the displays are outside of the above-mentioned
ranges:
calibration by trained personell is required.
Calibration
Calibration may not be possible due to device and chan-
nel errors.
Carrying out the fresh air calibration
Calibrate the instrument to fresh air, free of the presence
of measured gases or other interfering gases. During the
fresh air calibration the zero point of all sensors (with the
exception of DrägerSensor XXS O ) is set to 0. The dis-
2
play of DrägerSensor XXS O is set to 20.9 vol.%.
2
____________
1) Upon application of the Dräger mixed gas (order no. 68 11 130) the
displays should be in this range. Different concentrations can be
adjusted using the enclosed software Dräger CC Vision.
10
Switch on the instrument.
Press the [ + ] key and keep it depressed for 5 secon-
ds, enter the password (password on delivery = 001),
the symbol for fresh air calibration »
Press the [OK] key to start the fresh air calibration
function.
– The measured values flash.
When the measured values are stable:
Press the [OK] key in order to start the fresh air cali-
bration.
When the calibration is complete:
– The current gas concentration display changes to the
display » OK «.
Press the [OK] key to exit the calibration function or
wait for approx. 5 seconds. Press the [ + ] key twice to
return to the measuring mode.
If an error has occurred during the fresh air calibration.
– The error message » « appears and »
displayed for the sensor concerned instead of the
measured value. In this case, repeat the fresh air cali-
bration. If necessary, the sensor should be replaced
by qualified personnel.
Calibrating the sensitivity for an individual
measuring channel
– The span calibration can be carried out specifically for
individual sensors.
– During the span calibration, the sensitivity of the
selected sensor is set to the value of the used test gas.
– 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
Connect the test gas cylinder with the calibration
cradle.
Vent the test gas leaving the adapter into a fume
cupboard or into the open air (with a hose connected
to the second connector of the calibration cradle).
ATTENTION:
Test gas must not be inhaled. Risk to
health!
Observe the hazard warnings of the
relevant safety data sheets.
Switch on the device and insert it into the calibration
cradle.
Press the [ + ] key and keep it depressed for
« appears. 5 seconds to call the calibration menu, enter the pass-
word (password on delivery = 001).
Using the [ + ] key, select the span calibration
function, the symbol for span calibration »
flashes.
Press the [OK] key to start the channel selection.
– The display flashes and shows the gas of the first
measuring channel, e.g. » Ex - %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).
– The calibration gas concentration is displayed
Press the [OK] key to confirm the calibration gas con-
centration or use the [ + ] key to change the calibrati-
« is
on 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 value has stabilized:
Press the [OK] key to perform the calibration.
– The display containing the current gas concentration
changes with the display » OK «.
Press the [OK] key 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
device changes to the measuring mode.
Close the test gas cylinder valve and remove the de-
vice from the calibration cradle.
If a fault occurred during the span calibration:
– The fault message »
displayed for the respective sensor instead of the
measured value.
In this case, repeat the calibration.
If necessary, replace the sensor.
«
- vol. %, H S - ppm or
2 2
« appears and » « is