Martel DPC300A, Reference Manual, Page: 8 / 48

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Figures 2A and 2B show the location of the keys. Table 2 describes the
function of each key.
Figure 2A
Keypad
Table 2 Key Functions
No. Name Description
1 Function Keys These are soft keys used to configure the calibrator
2 ON/OFF Key This key is used to turn the calibrator on and off
3 ZERO Key This key is used to zero pressure measurements
4 Arrow Keys Used to control mA source/sim. and to set pump
and % error limits
5 Home Key Return to main menu screen
6 Pump Key Push to run pump (Electric pump version)
Note : When the calibrator is turned on by pressing the ON/OFF key,
it will go through a short startup self-check routine. During that
routine, the display shows the current firmware revision level, auto
shutdown status and the range of the internal pressure sensor. The
calibrator requires a maximum of 5 minutes warm-up to rated
accuracy. Large changes in ambient temperature may require a
longer warm-up period. See section 2.3 for instructions on zeroing
the pressure sensor displays. Pressure ranges should be zeroed
each time the calibrator is started.