Troubleshooting/Maintenance - Amprobe LCR55A User Manual

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Temperature Coefficient: ≤0.5µF: 0.1%/°C; >0.5µF: 0.2%/°C
OL Protection: 0.1A/250V fast blow fuse.
Inductance
Ranges: 200µH, 2, 20, 200mH, 2, 20, 200H
Accuracy: 200µH rg: ±(5.0%rdg +30dgt)*
2 to 200mH: ±(3.0% +20dgt)*
2 to 200H: ±(5.0% +20dgt)*
*For values of Q ≤7
Test Frequency: 200µH to 2H rgs: 1000Hz; 20 and 200H ranges: 100Hz
Temperature Coefficient, ≤0.5H: 0.2%/°C; >0.5H: 0.5%/°C
OL Protection: 0.1A/250V fast blow fuse
Transistor Test
hFE Range: 0-1000
hFE Base Current: 5µA approx.
hFE Voltage C-E: 3.0VDC approx.
I Range, Leakage Current: 10nA to 20µA
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Optional Accessories
VC221B Vinyl Carrying Case (for meter and holster)
DL243D Standard Test Lead Set
DL248D Deluxe Test Lead Set
TL36A Replacement Test Leads with Alligator Clips

Troubleshooting/Maintenance

If there appears to be a malfunction during the operation of the meter, the
following steps should be performed in order to isolate the cause of the problem:
Check the battery.
Review the operating instructions for possible mistakes in operating procedure.
Inspect and test the Test Probes for a broken or intermittent connection.
Inspect and test the fuse. See Fuse Replacement.
Except for the replacement of the battery or fuse, repair of the multimeter
should be performed only by a Factory Authorized Service Center or by other
qualified instrument service personnel.
The front panel and case can be cleaned with a mild solution of detergent and
water. Apply sparingly with a soft cloth and allow to dry completely before using.
Battery/Fuse Replacement
� Warning
To prevent electrical shock hazard, turn off the multimeter
and any device or circuit under test and disconnect the test
leads before removing the rear cover.
1. Remove the screws and lift off the rear case.
2. Fuse Replacement: Remove the blown fuse (5 x 20mm) from the fuse holder.
Replace with a 0.1A/250V quick acting glass fuse (one spare fuse is located on
the right side of the battery compartment). Amprobe replacement fuse part
number is FP 125.
3. Battery replacement: Remove battery and replace with NEDA type 1604 or
equivalent 9 volt alkaline battery.
4. Reassemble the instrument.
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