Martel Electronics DPC300A - Manual (Page 16)

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Use the DONE option to save the changes and return home. When
a display is deactivated its configuration is retained. When the
display is activated its configuration is checked against the
configurations of the other currently active displays, if the
configurations are in conflict the recalled display’s configuration is
modified to avoid the conflict. If all three displays are deactivated the
LOWER display will come on automatically
2.4.6 Damping
Damping can be turned ON or OFF using the Damping menu
selection. When damping is ON, the calibrator displays an running
average reading of ten measurements. The calibrator makes
approximately 3 readings per second.
2.4.7 Pump Limits
To prevent overpressure of sensitive devices the maximum pressure
(pump limit) can be set. When in this mode use the arrow keys to set
the maximum pressure.
2.4.8 HART™ Resistor
An internal 250 ohm HART Resistor can be enabled when the
BetaGauge 330 is operated in the “mA Measure-24V” mode. This
allows a HART Communicator to be connected across the mA
terminals and eliminates the need for adding an external resistor.
Note: When the HART resistor is on the maximum load driving
capacity is 750 ohms.
3. Initial Setup and Basic Pressure Generation
1. The DPC-300A is supplied with a special low-volume calibration
hose to enable faster pressure generation and quick pressure
stabilisation. Included in delivery are "Quick-fit" hose connectors
and various adapters. It is recommended that this hose is used in
order to achieve the best results. As soon as the fittings are
installed and the calibrator is connected to the test item the
calibrator is ready for use.
2. The pressure calibrator must be configured for the appropriate
application (see chapter 6).
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