Siemens 7MB2335, Operating Instructions Manual, Page: 98 / 168

Operation
5-48
Operating instructions ULTRAMAT 23 gas analyzer
C79000-B5276-C216-03
5.11 Other Inputs
5.11.1 PUMP Key
This key switches the internal, sample gas pump (if present) on and off.
If the pump is switched off whilst the analyzer is in input mode, it is also
switched on again by pressing the
MEAS key if parameterized
accordingly (see Section 5.10.1.4).
The pump can also be switched on and off via the binary input (see
Chapter 3). The binary input has priority over the button.
5.11.2 CAL Key
If the analyzer is in measuring mode, pressing the CAL key triggers a
single, automatic calibration with ambient air or nitrogen (AUTOCAL).
The
CAL key cannot be used during the warm-up mode.
If the flow is too low during a zero adjustment triggered by pressing the
key, the analyzer remains in this status until either the flow is sufficient
or the zero adjustment is aborted by pressing the ESC key.
In addition to the CAL key, an AUTOCAL can also be triggered via the
binary input. The binary input has priority ober the key.