Pressure Systems 98RK-1 user manual PURGE Mode Inputs

Pressure Systems, Inc. 98RK-1 & 9816 User’s Manual©

2.3.4.4PURGE Mode Inputs

9816 scanners are supplied with a purge/leak-chargefeature. The purge feature allows users to apply positive pressure to the PURGE input which will then be vented out of the user input ports, forcing contaminants (such as moisture) out of the pneumatic input lines. (Note: on common reference 9816 scanners, only the numbered input ports will be purged. RUN REF is not purged). True differential 9816 scanners will purge both the run and reference input ports for all channels. The purge supply provided to the 9816 must always be a higher pressure than the highest pressure present on the input ports of the module. The purge supply must also be capable of maintaining proper purge pressure at the high flow rates encountered while the module is in the purge mode.

WARNING: Failure to provide proper purge supply pressure may result in migration of moisture and contaminants into the 9816 module. This can result in permanent damage to module components.

When commanded into the PURGE position, the purge input pressure will be connected to the numbered measurement input ports allowing for a flow of air away from the instrument. The purge cycle should be terminated by commanding the 9816 into a non-purge mode, such as CAL.

WARNING: Purge cycles should NEVER be terminated by turning off the purge supply air while in the PURGE position.

Figure 2.6

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