Martel Electronics 135 - Manual (Page 37)

When the OPT key is pressed for the first after the calibrator is
powered on, the calibrator reads the configuration and calibration data
from the Pressure Module. The first time the OPT key is pressed, a
series of messages is displayed listing the configuration of the Pressure
Module.
The first display is:
The top line shows that a Pressure Module is attached and the second
line gives the range. The above example is for a 30 PSIG Pressure
Module. The second display is:
The top line shows the serial number of the module and the second line
shows the date of the last calibration. The displays will remain for
approximately 1 second each, and then the pressure units menu will
appear.
This menu allows the selection of engineering units for pressure
display. The choices are displayed 4 at a time. Scrolling past the first or
last displayed selection provides additional choices.
The engineering units available are: PSI, inH₂O, inHg, Kpa, cmH₂O,
mmHg, mbar, Bar. The selection between absolute and gauge is made
automatically based on the type of module attached.
When any of the water column scales are selected from the main
engineering units menu, a second menu will be displayed that allows
the operator to select the conversion temperature desired. 20°C is the
Instrument Society of America (ISA) standard, 60°F is used by the
American Gas Association (AGA) and 4°C is used in scientific research.
Input Functions
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Pressure Module
PSIG 30
Serial No. 2045
LastCal 080593
Engineering Unit
PSI “H2O “Hg Kpa