Martel Electronics 235 - Manual (Page 14)

Option Key
The OPT key is used to activate the external module that is attached to
the feature connector of the Model 230/235 calibrator. When the OPT
key is pressed for the first time after the calibrator is powered on, the
calibrator reads the configuration and calibration data from the
attached module. If no valid module is attached, or if the attached
module is not supported by the software revision of the calibrator, an
error message will appear. A list of error messages and their meanings
can be found on page 71.
The first time the OPT key is pressed, a series of messages are displayed
listing the configuration of the module.
A typical display is:
The top line shows the module type and the second line gives the
range. The above example is for the 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 appropriate display for the
attached module will appear.
When the OPT key is pressed a subsequent time(s), the calibrator
checks the ID and serial number of the attached module. If these
match the previous values, the module is activated immediately,
bypassing the title and serial number displays.
The OPT key can be pressed when the calibrator is in input or output
mode, depending on the function of the attached external module.
Operation
230/235 9
Pressure Module
PSIG
30
Serial No. 2045
LastCal 080593