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Appendix E
Totalized flows can be reported on the LCD display, and can be output as a
pulse per unit volume. Processor and display limitations currently do not
allow totalized flow and velocity to be displayed and output simultaneously.
Pulse outputs are available as both dry contact closures and +5v pulses for
driving an external totalizer or sampler.
E-1.1
Power Requirements
The ADFM Analog Ouput Module is designed to operate using externally
supplied DC power. Standard operation of the unit requires +10 to +30
VDC, unregulated. Limited operation of the unit from the internal 9v bat-
tery is possible, however, analog outputs will not function and the battery
life is estimated as six hours or less. Total power requirements will vary
depending on configuration but should never exceed 4 watts; please consult
MGD Technologies Inc. for more information.
E-1.2
Installation Overview
Installation and operation of the ADFM Analog Output Module can be di-
vided into five (5) basic functions. Details concerning each of these func-
tions are covered in detail in the following sections. The five basic func-
tions are:
a. Physical installation of enclosure and components
b. Connect wiring to ADFM, power supply, and external devices
c. Setup and calibrate the DGH Modules
d. Program the micro-controller, configure switches
e. Verify output scaling and confirm system operation
Two versions of the printed circuit board (PCB) in the module have been
manufactured. Installation and operation is very similar for both, and they
are functionally equivalent. Pertinent differences are documented where
appropriate.
E-1.3
Maintenance and Repair
The ADFM Analog Output Module requires no routine maintenance other
than replacement of the internal 9-volt battery, if installed. The equipment
should be checked periodically to ensure that it is operating properly, and
that the electronics are clean, dry, and properly protected from harmful ex-
posure to moisture, corrosive atmospheres, and physical damage. Certain
components of the unit can be replaced by the end user. Please consult the
troubleshooting and repair information in this manual, or contact MGD
Technologies Inc. for further information.
page E-2
MGD Technologies, Inc.
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