2 using the backlight, 3 using the zero function, Other displays – Martel Electronics DPC300A User Manual
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Table 4 Mode Concurrency
Active Display
P[1]
[EXT]
P[1]
ST
[EXT]
ST
mA
mA
Loop
Volts
P[1] X
X
X
X
X
X
X
[EXT] X
X
X
X
X
X
X
P[1]ST
X
X
[EXT]ST
X
X
mA
X
X
X
mA Loop X
X
X
Volts
X
X
X
X = valid mode
2.1.1.3 Accessing Other Menus
Use the MORE option on the Main Menu to access the other menu
functions.
2.2 Using the Backlight
The backlight is controlled by the LIGHT softkey on the main menu.
It toggles on and off when the key is pressed; this is one of the few
functions that cannot be controlled by the serial interface. There are
no user configuration settings for the backlight.
2.3 Using the Zero Function
When the ZERO KEY is pressed, the calibrator will zero the
active
display if a pressure mode is selected, and the pressure is within
the zero limit. The zero limits are within 10% of the full scale range of
the selected sensor. If the display indicates “OL,” the zero function
will not operate.”
Note: The ZERO KEY is only used for pressure.
2.3.1 Internal Sensor and Pressure Module (non-absolute)
When a sensor or module is selected on the active display and the
ZERO KEY is pressed the calibrator subtracts the current reading
from the output. The zero limits are within 10% of the full scale range
of the selected sensor. If the display indicates “OL,” the zero function
will not operate.
2.3.2 Absolute Pressure
When an absolute pressure range is selected on the active display
and the ZERO KEY is pressed the calibrator prompts the user to
enter the barometric reference pressure. This is done using the
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Other Displays