Fluke A40B, Instruction Manual

Page: 37 / 42

Precision AC Current Shunt Set
Repair Procedures Including Disassembly and Reassembly
29
Repair Procedures Including Disassembly and Reassembly
Repair Limits
This section of the manual provides procedures for making minor repairs to the Current
Shunts. These procedures are limited to the following replaceable parts as shown in Table
11 and Figure 14:
•
Coaxial shunt guard Binding Post
•
Coaxial shunt end plates
•
N-Type Connectors
The N-type connectors of the 10 mA, 20 mA and 50 mA boxed Current Shunts can be
replaced after removing the cover plate on the underside, but it is recommended the
Current Shunts be returned to a Fluke Service Center for repair. Other than battery
replacement, do not attempt to service the 1 mA Current Shunt.
Replacement batteries for the 1 mA Current Shunt must be NiHM. See the
Battery
Specifications earlier in the General Specification section of this manual. A NiMH
battery replacement kit is available from Fluke; see Table 13. Read the Safety
Information earlier in this manual before replacing the batteries.
All other repair and/or parts replacement should be performed at a Fluke Service Center.
See Contacting Fluke earlier in this manual to find the location nearest you.
Note
A replacement procedure for the N-type connectors is included in this
manual. However, Fluke highly recommends having the work performed at
a Fluke Service Center.
The LC-type connectors (50 A and 100 A shunts) cannot be repaired or
replaced in the field. These connectors are very robust and do not need to
be replaced unless they are damaged or worn. (Excessive heat build up
under load may indicate damage or wear.) If replacement of an LC
connector is necessary, have the work performed at a Fluke Service Center.
List of Tools Required for Repair
A list of the tools required for disassembly, repair, and reassembly follows:
•
2.5 mm Allen wrench for Current Shunts rated at 20 A or less
•
T25 Torx driver for Current Shunts rated at 50 A and 100 A
•
7 mm wrench (output end plate only)
•
No. 10 Torx driver
•
Magnetized slim line 5.5 mm wrench
•
50 W Soldering iron thin enough to work between the PCB struts
•
Solder removal copper braid
•
Solder suction tool
•
T20 Torx driver for replacing the batteries in the 1 mA Current Shunt