Martel Electronics 235 - Manual (Page 42)

thread lubricant should be used when making the connection to
prevent seizing or galling.
Media Compatibility
The Pressure Module is designed to provide optimum accuracy as a
secondary calibration device. It is not designed to be a general purpose
test gauge to be attached to live processes. The low pressure ranges
(0-100 PSIG) are compatible with non-corrosive gases. For long service
with good stability and accuracy, clean, dry instrument air or nitrogen
should be used. The high pressure ranges (300-5000 PSIG) are
compatible with non-corrosive liquids and gases. The best liquid to use
is distilled water.
Operation
The Pressure Module is activated by pressing the OPT key just as you
would with any of the other function keys, such as volts or milliamps.
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
Input Functions
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Pressure Module
PSIG 30
Serial No. 2045
LastCal 080593