Function Test - Hameg Instruments HM8012 Manual

F u n c t i o n T e s t

Function Test

This test should help verify, at certain intervals,
the functions of HM8012 without any great
expenditure in measurement instruments. To
achieve thermal balance, the module and the
basic instrument, in its case, must be energized
for at least 60 minutes before the test begins.
Measurement equipment used
Calibrator AC/DC for instance Fluke 5101B /
Fluke 5700A / Rotek 600
Resistors of 5 k , 50 k , 500 k 0.01% for instance
model S102 J by Vishay
Resistors 500 k , 5 M 0.02%, for instance models
CNS020 by Vishay.
Test procedure
If one of the indicated calibrators is available or
if precision calibrators are appropriate, all the
HM8012 measurements ranges can be checked
using the following tables which indicate the limit
values. Recalibration, however, should only be
performed if the appropriate precision calibrator
is available.
Before any change of ranges, ensure that the
signal at HM8012 does not represent an unaccep-
table load of the object under examination. For
the link between the calibrator and HM8012,
shielded cables must be used to prevent any
unwanted influence caused by the measurement
signal.
a) DC voltage ranges
No. Range Reference
(+23 °C)
1 500 mV 250 mV
2 5 V 2.5 V
3 50 V 25. V
4 500 V 250 V
5 600 V 550.00 V
34
Subject to change without notice
Display limits
249.85 - 250.15
2.4986 - 2.5014
24.985 - 25.015
249.86 - 250.14
549.7 - 550.3
b) AC voltage ranges
(1) = 40 Hz to 5 kHz
(2) = 20 Hz to 20 kHz
(3) = 40 Hz to 1 kHz
(4) = 20 Hz to 1 kHz.
No. Range Reference
(+23 °C)
1 500 mV 250 mV
2 5 V 2.5 V
3 50 V 25 V
4 500 V 250 V
5 600 V 550 V
c) DC current ranges
No. Range Reference
(+23 °C)
1 500 µA 250.00 µA
2 5 mA 2.5000 mA
3 50 mA 25.000 mA
4 500 mA 250.00 mA
5 10 A 1.800 A
d) AC current ranges (f = 400 Hz)
No. Range Reference
(+23 °C)
1 500 µA 250.00 µA
2 5 mA 2.5000 mA
3 50 mA 25.000 mA
4 500 mA 250.00 mA
5 10 A 1.800 A
e) Resistor ranges
No. Range Reference
(+23 °C)
1 500 200.00
2 5 k 2.0000 k
3 50 k 20.000 k
4 500 k 200.00 k
5 5 M 2.0000 M
6 50 M 20.000 M
Display limits
(1) 248.65 - 251.35
(2) 247.15 - 252.85
(1) 2.4865 - 2.5135
(2) 2,4715 - 2.5285
(1) 24.865 - 25.135
(2) 24.715 - 25.285
(3) 248.65 - 251.35
(4) 247.15 - 252.85
(3) 547.3 - 552.6
(4) 544.0 - 555.9
Display limits
249.48 - 250.52
2.4948 - 2.5052
24.948 - 25.052
249.48 - 250.52
1.794 - 1.806
Display limits
247.9 - 252.1
2.479 - 2.521
24.79 - 25.21
247.9 - 252.1
1.775 - 1.825
Display limits
199.83 - 200.17
1.9989 - 2.0011
19.989 - 20.011
199.89 - 200.11
1.9939 - 2.0061
19.393 - 20.061