PQM-700 Operating Manual
78
8.3.2 C-5(A) current probe
The C-5(A) probe is used to measure the alternating and
direct current without interrupting the circuit with the flowing
current. The measuring range is 1400 A for DC and 1000 A
AC. The output signal is voltage proportional to the meas-
ured current. The probe has one 1000 A measuring range,
with the 1 mV/A sensitivity, DC zero adjustment knob, and
LED power supply indicator.
The output signal is supplied by a 1.5-meter lead with a pin
adapted for the socket in the meter.
The arrow located on one of the jaws indicates the current
flow direction. It is assumed that the current is flowing in the
positive direction if it is flowing from the source to the re-
ceiver. Such probe orientation is required for a correct
power measurement.
Clamps with letter 'A' at the end of marking (e.g. C-5A)
are clamps with automatic type detection in compatible devices. Other parameters are the same
as in the case of clamps without automatic clamp type detection.
Overload:
Direct current (DC):
up to 3000 A (continuous mode),
Alternating current (AC):
up to 1000 A in continuous mode up to
the 1 kHz frequency
Limitation of maximum current for continuous operation for frequencies above 1 kHz ac-
cording to the relationship:
I
cont
= 1000 A/f [kHz]
Switching on
To switch on the probe, put the switch in the 1 mV/A position. Green LED indicates the
correct operation. If after switching the LED is not lit or goes off, replace the battery.
DC zero indication correction
Make sure the jaws are closed and there is no conductor inside them. Then, connect the
probe to the analyzer and launch the
Sonel Analysis
software in the instantaneous values
viewing mode (check if the measurement point is correctly configured for measurement
with the C-5(A) probe). Press the knob and turn until the DC current indication is zero.
Reference conditions
Temperature:
+18…+28°C
Humidity:
20…75% RH
Battery voltage:
9
V ± 0.1 V
Conductor position:
conductor centered in jaws
Current:
direct (DC) or sinusoidal (AC) f ≤ 65 Hz
Continuous magnetic field:
earth field (<40 A/m)
Alternating magnetic field:
none
Conductors in direct vicinity:
no flowing current
Fig. 2. C-5(A) probe.
Summary of Contents for PQM-700
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