40
SVERKER 750/760
Programma Electric AB
ZP-CD01E R05A
6.4 Measuring current
The ammeter in Sverker has four inputs. Three of
them are internal inputs fixed to the individual
current outputs, and one is an external input located
on the control panel. Active input (i.e. ammeter test
point) is indicated by an indicator lamp.
Use the button marked A to transfer the ammeter
test point to the selected input.
The internal inputs are used to measure the current
generated by Sverker. The external input is used to
measure current in an external circuit. If so desired,
however, it can be used for measurement of current
from Sverker. This is useful since ammeter accuracy
is highest when measurement proceeds via the
external input. The external input can be used for
currents of up to 6 A.
The HOLD (freeze) function makes it possible to
measure currents of very short duration. Activate it
by pressing the button marked HOLD. See the
section headed ”Ammeter and voltmeter” in Chap-
ter 3.
6.3 Selecting the
correct current output
Select the output at which the setting knob must be
turned the furthest to obtain the desired current.
This will improve setting accuracy and enable
Sverker to deliver maximum power.
When the object being tested has high impedance or
may reach saturation, it is especially important to
use the output having the highest possible voltage.
This will drive the desired current through the
object being tested efficiently and minimize distor-
tion of the current waveform.
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