XS series operating manual
XS user manual v0.55 - 29 -
Measurement thresholds
The ground continuity function can operate either with one or two measurement threshold(s)
between 1m to 1500m.
A measurement is PASS after comparison between the displayed value and the thresholds.
When looking for a value only lower than a limit, the HIGH THRESHOLD is used to set the limit and
the LOW THRESHOLD is not used by setting a value equal to the minimum resistance ( basically
0m ).
When looking for a ground continuity resistance lower than a limit but not too much low ( which can
means that the specimen is not correctly connected), then the LOW THRESHOLD is set the
minimum continuity value expected and the HIGH THRESHOLD is set to the maximum continuity
value expected.
Setting examples:
PASS ( continuity < High limit )
FAIL ( continuity > High limit )
PASS ( continuity > Low limit and < High limit)
FAIL ( continuity < Low limit)
* threshold not active
Timer
The measurement voltage can stay permanently ( timer value set to 0 sec.) or during a time
between 1 and 999 sec. adjustable by 1 sec. step.
Rise and fall times are adjustable in time ( second ) or in voltage increase ( dv/dt) from
0.1 to 0.9 sec. and from 1 to 999 sec. or in V/s from 1V/s to 1000V/s.
Measurement cycles
If the current generated is high ( 25A), it can lead to a current overheating of the transformer and
start up its protection (See Section 5.3).
The hereunder board indicates the maximum operating time of the ground continuity resistance
measurement according to the use cycle (1 ½ cycle represents use of the current during one second
for a total duration of the cycle of 2 seconds)
Note : All these duration concern a 32A current. For lower currents, this duration is higher.
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