INTRODUCTION
PEM‟s Rogowski Current Waveform Transducers combine high bandwidth, safety, and the minimum
disruption to the circuit under test. These instructions should be followed whenever the unit is used.
They are intended to help you obtain the best and safest performance from the transducer.
SPECIFICATION
ACCURACY (5 to 100% full scale)
Within the limits of bandwidth and low frequency noise that are specified on the relevant CWT
specification sheet.
Normally ±0.2% (traceable to UKAS) with the
conductor central in the CWT loop. See the calibration
certificate for more details.
±1% typ. variation of accuracy with conductor position
in the loop (see „Obtaining The Best Measurement‟)
POWER SUPPLY
The CWT can be powered by both battery and an external DC voltage. With the external DC supply
present the batteries are inoperative.
2.1 or 2.5mm jack socket – polarity indicated on front of
CWT
DC quiescent supply current:
30mA (@12V DC) , 30mA (@ 24V DC)
When specified with rechargeable batteries the CWT operates directly from the batteries when there
is no DC supply present and is powered directly from the DC supply when present. With the DC
supply present the rechargeable batteries are permanently trickle charged.
4 (four) 1.2V NiMH rechargeable batteries
30 hrs typ. (based on a 1400mAH cell)
2.1 or 2.5mm jack socket – polarity indicated on front of
CWT
DC quiescent supply current:
70mA (@12V DC) , 70mA (@ 24V DC)
±6V (corresponding to ±Peak Current Rating of CWT)
0.5m BNC to BNC 50Ω cable
OPERATING TEMPERATURE RANGES
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