May
2015
WorkHorse H-ADCP Operation Manual
Page 82
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Considering the complexity of the H-ADCP, TRDI has provided as much information as practical for field
repair; fault location to the component level is beyond the scope of these instructions. The provided in-
formation assumes that faults are isolated with a large degree of certainty to a Least Replaceable Assem-
bly (LRA) level only. The time to repair the system will be minimized if an entire replacement unit is
available in the field. If time to repair is of essence, Teledyne RD Instruments strongly advises the availa-
bility of the listed LRAs.
Table 5:
List of Least Replaceable Assemblies
LRA
Description
H-ADCP
The entire H-ADCP; includes the electronics, housing, transducer ceramic assemblies, and end-cap.
I/O Cable
Connects the H-ADCP with the Computer.
End-Cap
Includes the end-cap, connector, and internal I/O cable.
H-ADCP electronics
The spare boards kit Includes the PIO, CPU, and DSP boards.
PC Card
Replaceable PC recorder card.
Since these Least Replaceable Assemblies are manufactured in different configurations, please contact
Teledyne RD Instruments (see
for contact information) to obtain the correct part
number for your specific system configuration. Please provide the serial number of the H-ADCP when
contacting Teledyne RD Instruments about a replacement assembly. If you want to replace the I/O Cable
only, then please provide the cable length.
Equipment Required
Special test equipment is not needed for trouble shooting and fault isolation. The required equipment is
listed in Table 6. Any equipment satisfying the critical specification listed may be used.
Table 6:
Required Test Equipment
Required Test Equipment
Critical Specification
DMM
Resolution: 3 ½ digit
DC-Voltage Range: 200 mV, 2V, 20 V, 200V
DC-Voltage Accuracy:
±
1%
AC-Voltage Range: 200 V, 450 V
AC-Voltage Accuracy:
±
2%
Resistance Range: 200, 2 k, 20 k, 200 k, 20 MOhm
Res.-Accuracy:
±
2% @ 200 Ohm to 200 kOhm
Res.-Accuracy:
±
5% @ 20 Mohm
Capacitance Range: 20 nF, 2 uF, 20 uF
Capacitance Accuracy:
±
5%
Serial Data EIA Break-Out Box such as from
International Data Sciences, Inc. 475 Jefferson
Boulevard Warwick, RI 02886-1317 USA.
Model 60 or similar is recommended as it eases the troubleshooting of RS-232 communica-
tion problems significantly. Other manufacturers or models may be substituted.
The EIA Break-out Panel is not necessary, but eases RS-232 communication problems
troubleshooting significantly.