2-18
USER HANDBOOK
Fig. 2.20 Pump Symbol Displayed
Note: Pump can only be switched ON / OFF when the
instrument has no alarms.
2.10.2 Assisted Diffusion Option
If assisted diffusion is congured, after instrument warm-up,
the pump remains ON at low speed. *This setting is used for
reactive gases.
A press and hold of the button re-sets the pump to run at
normal speed. When the pump is running at normal speed,
a pump symbol rotates in the display as illustrated in
Fig.2.20. Press and hold the button again to switch the
pump OFF. A further press and hold of the button re-sets
the pump to run at low speed.
Note*: GMI recommend that pumped instruments, measuring
reactive gases, use assisted diffusion mode in
preference to diffusion mode.
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