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Getting Started Teledyne API T703/T703U Calibrator Operation Manual
38
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!
Ambient
Air
Figure 3-13: Basic Pneumatic Setup
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/T703U.
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 4.10) should be set to OFF.
07223C DCN6572