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Operating and maintenance instructions Section 5: Troubleshooting
3-9008-701 Rev J January 2015
General 73
Section 5: Troubleshooting
5.1 General
Should the electrical system of the compact prover require repair, the following two sections
contain solutions and information to help solve problems that may be encountered. If these
steps and information do not help solve the operational problem, contact a Daniel
representative for assistance. Figure 5-2 and Figure 5-3 are provided as typical wiring diagrams
for reference. Special build electrical systems will have an electrical diagram supplied with the
documentation package.
5.2 Interface Signals
Reference Figure 2-3 and Figure 2-4.
Important
Do not handle electronic-sensitive equipment without an ESD grounding wrist-strap.
Failure to use an anti-static grounding device could cause damage to the compact prover
electronics and render them inoperable.
The compact prover interface board control circuits communicate with the operating computer
using digital signals. These signals are the RUN command input, the UPSTREAM output, and the
volume DETECTOR output.
RUN command: The run command signal is held high (approx. 12VDC) by the interface board
and must be pulled low (less than 2VDC) by the operating computer to launch the measurement
piston. This signal is present between pins 2(-) and 5(+) of J-2.
UPSTREAM output: The upstream signal is designed as an open collector (30VDC, 400mA max)
output. This signal must be pulled high by the operating computer. It is pulled low by the
interface board whenever the flag is within the upstream switch. This signal is present between
pins 2(-) and 6(+) of J-2.
DETECTOR output: The detector signal is designed as an open collector (30VDC, 400mA max)
output. This signal must be pulled high by the operating computer, and is pulled low by the
HIGH VOLTAGE HAZARD
Wear appropriate personal protective equipment and follow all safety instructions when
working with high voltage electrical circuits.
Failure to do so will result in serious injury or death.