XS series operating manual
XS user manual v0.55
- 26 -
The measurement range is defined by the following formula:
(Utest / Umax generator) x 20 G
This gives the following board for the
500, 750, 1000 et 1500V
standard voltages
Voltage
Measurement range
500V
1M
to 6.66G
750V
1M
to 10G
1000V
1M
to 13.34G
1500V
1.5M
to 20G
Measurement accuracy
2000 digits numeric display with unity indication
(K
, M
, G
, T
).
Accuracy (% of the reading, 1U = 1 digit) : ±(1% + 1U)
NORMAL mode : from 1.00
MΩ to 20GΩ
Input impedance = 10kΩ ± 1%.
CAPACITANCE mode: from
1.00M
to 20G
with an accuracy equal to the NORMAL mode
accuracy
±100k
Input impedance =
10 M
±1%
Measurement threshold
The megohmmeter function can operate either with one or two measurement threshold(s) between
1M
up to 20G
.
A measurement is PASS after comparison between the displayed value and the thresholds.
When looking for a value only higher than a limit, the LOW THRESHOLD is used to set the limit and
the HIGH THRESHOLD is not used by setting a value equal to the maximum resistance (basically
20G
).
When looking for an insulation resistance higher than a limit but not too much high ( which can
means that the specimen is not correctly connected), then the LOW THRESHOLD is set the
minimum insulation value expected and the HIGH THRESHOLD is set to the maximum insulation
value expected.
Setting examples:
LOW
THRESHOLD
MEASURED
value
HIGH
THRESHOLD
Result
10 M
15.4 M
20 G
*
PASS ( insulation > LOW limit )
10 M
9.0 M
100 M
FAIL ( insulation < LOW limit)
55 M
63.2 M
80 M
PASS ( insulation > LOW limit + < HIGH limit)
45 M
110 G
75 M
FAIL (insulation > HIGH limit )
* threshold not active
