E N G L I S H
49
6.4 Fuse(s) replacement
Follow these steps to replace the internal
fuse (s):
1. Unplug the test leads. Remove the rubber
boot from the instrument.
2. Remove the screws in the rear of the
instrument and separate the front and rear
housing.
3. Replace the fuse (s) with the same type
and size as the one removed.
4. Snap the front and rear housing back
together and reinstall the screws.
5. Reattach the rubber boot.
7. ACCESORIES
NOTE: When servicing the meter, use only
the replaceable parts specified.
UD71TLAC
Test Lead & Alligator Clip Set
UD50RS
RS-232C Interface Cable (1.5m) [Optional]
UD85SW
RS-232C Software Disc [Optional]
8. SPECIFICATIONS
8.1 Specifications.
Accuracy is given as + ([% of reading] +
[number of least significant digits]) at 18°C
to 28°C with relative humidity up to 80%,
for a period of one year after calibration.
Function
Volts DC
Range Resolution
Accuracy
Remarks
400 mV
4 V
40 V
400 V
0.1 mV
1 V
10 V
0.1 V
± 0.3 % + 2 dgts
INPUT
IMPEDANCE:
> 100 MΩ
1000 V
1 V
± 0.75 % +3 dgts
APPROX.
11 MΩ
Function
Amperes DC
Range Resolution
Accuracy
Remarks
400 μA
4000 μA
40 mA
400 mA
0.1 μA
1 μA
0.01 mA
0.1 mA
± 0.5 % + 1 dgt
VOLTAGE
DROP:
100 μVμA
1.2 mV/mA
4 A
10 A
0.001 A
0.01 A
± 1.0 % + 5 dgts
75 mV/A
Function
Ohms
Range Resolution
Accuracy
Remarks
400 Ω
0.1 Ω
± 0.5 % + 10 dgt
OPEN CIRCUIT
VOLTAGE
< 1.2 V
4 KΩ
40 KΩ
400 KΩ
4 MΩ
1 Ω
10 Ω
0.1 KΩ
1 KΩ
± 0.5 % + 10 dgt
40 MΩ
10 KΩ
± 1.2 % + 8 dgts
Function
Continuity
OPEN CIRCUIT TEST VOLTAGE: 1.2 V
THRESHOLD: Approx.<100 Ω
Function
Verificación de Diodo
OPEN CIRCUIT TEST VOLTAGE: 3 V
MAX. TEST CURRENT: 2.5 mA
