32
Subject to change without notice
No. Range
Reference
Display limits
(+23 °C)
1 500
200.00
199.83 - 200.17
2 5 k 2.0000
k
1.9989 - 2.0011
3 50 k 20.000
k
19.989 - 20.011
4 500 k 200.00
k
199.89 - 200.11
5 5 M 2.0000
M
1.9939 - 2.0061
6 50 M 20.000
M
19.393 - 20.061
No. Range
Reference
Display limits
(+23 °C)
1
500 μA
250.00 μA
249.48 - 250.52
2
5 mA
2.5000 mA
2.4948 - 2.5052
3
50 mA
25.000 mA
24.948 - 25.052
4
500 mA
250.00 mA
249.48 - 250.52
5
10 A
1.800 A
1.794 - 1.806
No. Range
Reference
Display limits
(+23 °C)
1
500 μA
250.00 μA
247.9 - 252.1
2
5 mA
2.5000 mA
2.479 - 2.521
3
50 mA
25.000 mA
24.79 - 25.21
4
500 mA
250.00 mA
247.9 - 252.1
5
10 A
1.800 A
1.775 - 1.825
Function Test
This test should help verify, at certain intervals,
the functions of HM8012 without any great expen-
diture in measurement instruments. To achieve
thermal balance, the module and the basic instru-
ment, 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
infl uence caused by the measurement signal.
a) DC voltage ranges
No. Range
Reference
Display limits
(+23 °C)
1
500 mV
250 mV
249.85 - 250.15
2
5 V
2.5 V
2.4986 - 2.5014
3
50 V
25. V
24.985 - 25.015
4
500 V
250 V
249.86 - 250.14
5
600 V
550.00 V
549.7 - 550.3
No. Range
Reference
Display limits
(+23 °C)
1
500 mV
250 mV
(1) 248.65 - 251.35
(2) 247.15 - 252.85
2
5 V
2.5 V
(1) 2.4865 - 2.5135
(2) 2,4715 - 2.5285
3
50 V
25 V
(1) 24.865 - 25.135
(2) 24.715 - 25.285
4
500 V
250 V
(3) 248.65 - 251.35
(4) 247.15 - 252.85
5
600 V
550 V
(3) 547.3 - 552.6
(4) 544.0 - 555.9
F u n c t i o n T e s t
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.
c) DC current ranges
d) AC current ranges (f = 400 Hz)
e) Resistor ranges
