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Pump Operation
Pump Operation
With Dräger X-am 125 pump
Accessories:
Dräger X-am 125 pump, sampling hose and probes, see Order List, see “Accessories” on
Commissioning and performing the measurement:
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see the Instructions for Use of the Dräger X-am 125.
With hand pump adapter and rubber ball pump
Accessories:
Hand pump adapter, rubber ball pump, sampling hose and probes, see Order List, see
Commissioning and performing the measurement:
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see the Instructions for Use of the used accessories.
Observe the following during pump operation mode
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The required waiting time when flushing the extension hose or probes.
Prior to every measurement, flush the Dräger sampling hose or the Dräger probes with the
air sample to be measured.
— It is absolutely necessary to flush the extension hose for a period of time to eliminate or
minimize the effects which may interfere with measurements when using a sampling hose
or a probe, e.g. memory effects, dead volume.
— The flushing time depends on various factors e.g. type and concentration of the gas or va-
por to be measured, material, length, diameter and age of the sampling hose or the probe.
Generally, when using a sampling hose (new, dry, clean), a typical flushing time of approx.
3 seconds is required per meter. This flushing time applies in addition to the sensor re-
sponse time (see the Instructions for Use of the used gas measuring device).
Example:
— In the case of a 10 m long sampling hose, the flushing time is approx. 30 seconds and the
sensor response time is in addition approx. 60 seconds. Hence, the total time required to
read the gas measuring device is approx. 90 seconds.
— The flow rate alarm is delayed depending on the length of the hose by 10 to 30 seconds.