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CAUTION
At the instant of switching on, a current of up to 2A may flow and this
may switch off power packs with electronic current limiters.
5.2 Calibration
NOTE
The measurement flange should not be under load when the calibration
signal is being measured, since the calibration signal is mixed
additively.
Applying a 5V protective low voltage to pins 6 (+) and 7( ) on plug 1 or 3
triggers a calibration signal corresponding to approx. 50% of nominal measu-
ring range. You can read off the exact value from the identification plate.
The rated voltage for triggering the calibration signal is 5V (triggered when
U>2.7V).The trigger voltage is galvanically isolated from the supply voltage
and the measurement voltage. At voltages lower than 0.7V, the measuring
flange is in measurement mode. Current drain at rated voltage is approx. 2mA
and at maximum voltage is approx. 22mA.
CAUTION
To maintain measurement accuracy, the calibration signal should be
connected for no more than 5 minutes. A similar period is then needed
as a cooling phase before triggering the calibration signal again.
5.3 Frequency output
The factory setting for the frequency output voltage is 12 V (asymmetrical).
The frequency signal is on pin 4 opposite pin 1 ( ). If the connection cables
are fairly long (depending how they are fitted and the cross--section of the wi-
res, this means approx. 50 -- 100m) we recommend shifting to ™5V (symmetri-
cal). To do this, you will need to re--solder two solder bridges in the stator.
T10F
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