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Teledyne API T703 Calibrator Operation Manual Getting Started
37
3.3. PNENUMATIC CONNECTIONS
CAUTION!
Do not operate this instrument until you’ve removed dust plugs from inlet and
outlet/exhaust ports on the rear panel!
Figure 3-11: Basic Pneumatic Setup of T703
3.3.1. DRY AIR IN
When using the internal zero air pump, a source of dry air should be connected to the port labeled ‘Dry Air In’ on
the rear panel. This air should be supplied at atmospheric pressure. The supplied air should have a dew point
of –20 C or less.
Teledyne API can supply an optional desiccant cartridge that can be used to supply dry air to the T703.
3.3.2. ZERO AIR IN
An external pressurized source of zero air can be supplied at the ‘Zero Air” port on the rear panel. This is the
standard configuration when the zero air pump is not installed. This zero air should be scrubbed of ozone and
have a dew point of -20 C or less. The pressure of the zero air should be regulated to 20-35 psig.
NOTE
When connecting an external source of zero air to an T703 with an internal zero air pump installed, the
zero air pump should be disabled.
The “ZA_PUMP_ENABLE” VAR (see Section 6.10) should be set to OFF.
07223B DCN6378