Bit Determines A Problem Associated With The Sensor - Teledyne ADFM Pro20 Installation And Operation Manual

3.4.4 BIT Determines a
Problem Associated
with the Sensor
Section 3 Maintenance and Troubleshooting
ing harness for good connection at the battery terminals,
and the motherboard battery connector.
2. If you are using an external DC power supply, ensure that
it is supplying proper voltage to the ADFM controller (12 to
26 VDC). On the electronics box, ensure that the Battery
switch at the front panel is in the On ("1") position.
3. Perform a manual reset by turning and releasing the keyed
RESET switch on the ADFM box's inner front panel, or by
disconnecting and reconnecting power from the ADFM
canister.
If the above procedures are not successful in establishing com-
munications with the ADFM, the problem may be internal.
Contact the factory.
The BIT should display the following voltages for the ADFM:
VMVDC Interior and/or Exterior exterior power supply 12 - 36 VDC
VMVDD1 Main supply of electronics
VMVXDR Recorder
The built-in test (BIT) is not able to isolate the exact problem in
all cases. If, with help of BIT, you determined the fault to be
within the transducer or the Transmit Test failed, the problem
may be associated with the following items:
Any connection between the ADFM motherboard and the
transducer cable
A malfunctioning or damaged sensor
Check the pins on the sensor cable connection. There should be a
total of 11 pins, and the pins should be free of moisture and cor-
rosion.
Note
It is very important to keep all unused connectors capped.
Moisture penetration and corrosion can cause permanent
damage to the ADFM and/or the sensor.
With the exception of the sensor cable, the ADFM box controller
must be opened to check any other sensor related connection.
Ensure that the connections between the sensor interface board
and the motherboard are properly seated. There are two connec-
tions: a ribbon cable for VCC and grounding connections, and a
coaxial cable for transmission of the sensor's analog signal.
Do not alter the connections made on the motherboard for any
reason other than to re-establish proper connection.
ADFM® Flow Meter
5.0 VDC ± 0.2
10.7 VDC ±
0.2V
3-9