TELEDYNE API
M703E Calibrator Operator’s Manual Getting Started

3.3. PNENUMATIC CONNECTIONS

Figure 3-9: Basic Pneumatic Setup of M703E

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 M703E.

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 M703E 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.
05744 Rev B 19