Remote Sampling (With Pump Option); Pump Option - GMI V!SA Manual De Instrucciones

V!SA - USER HANDBOOK

2.7 REMOTE SAMPLING (with pump option)

Warning (Hand Aspirator): The V!SA is primarily
designed to be used with a built-in pump for remote
sampling. The hand aspirator can be used for indicative
sampling, but it must be noted that when using a
hand aspirator, a reading error in the region of +
20% is possible. In addition, whereas the pump can
sample quickly and accurately with up to 30 metres
of sample line, the hand aspirator must only be
used with up to 10 metres of sample line and the
sample time is extended. The sample line must be
intact and the proper flow established.
Remote sensing is carried out with the inbuilt electric pump
option, or by the hand aspirator for non-reactive gases,
using the sample connector at the bottom of the instrument
and sample tubing supplied with your instrument. On
pumped models the pump is off after start-up.

2.7.1 Pump Option:

Press and hold the green (RH) button to start or stop
the pump. The pump will run at normal speed for remote
sampling.
When the pump is running at normal speed, a pump symbol
rotates in the display as shown in Fig. 2.17.
Note: It is only possible to switch the pump ON / OFF
when instrument alarms are inactive.
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