Benning CM 8 Operating Manual page 26

7.11 Temperature ranges °C
Overload protection for temperature measurements: 600 V
Measuring range
� 50 °C ~ 399.9 °C
400 °C ~ 1000 °C
* The measuring accuracy of the K-type temperature sensor has to be added
to the specified measuring accuracy.
Wire temperature sensor (type K):
The measuring accuracy applies to stable ambient temperatures < ± 1 °C. After
a change of the ambient temperature of ± 2 °C, the measuring accuracy data
will apply after 1 hour.
7.12 Temperature ranges °F
Overload protection for temperature measurements: 600 V
Measuring range
� 58 °F ~ 751.9 °F
752 °F ~ 1832 °F
* The measuring accuracy of the K-type temperature sensor has to be added
to the specified measuring accuracy.
Wire temperature sensor (type K):
The measuring accuracy applies to stable ambient temperatures < ± 34 °F. After
a change of the ambient temperature of ± 36 °F °C, the measuring accuracy data
will apply after 1 hour.
8. Measuring with the BENNING CM 8
8.1 Preparing the measurement
Operate and store the BENNING CM 8 at the specified storage and operating
temperatures only! Do not permanently expose the device to sunlight.
- Strong sources of interference in the vicinity of the BENNING CM 8 might
involve unstable readings and measuring errors.
- Check stated nominal voltage and nominal current on the safety measuring
leads. Nominal voltage and current of the enclosed safety measuring leads
comply with the respective values of the BENNING CM 8.
- Check insulation of the safety measuring leads. If the insulation is damaged,
the safety measuring leads must be replaced immediately.
- Check the safety measuring leads for continuity. If the conductor in the
safety measuring lead is interrupted, replace the safety measuring leads
immediately.
- Before selecting another function by means of the rotary switch 8, discon-
nect the safety measuring leads from the measuring point.
- Strong sources of interference in the vicinity of the BENNING CM 8 might
involve unstable readings and measuring errors.
8.2 Voltage measurements (frequency measurements, THD - harmonic distortion)
Do not exceed the maximum permitted voltage with respect to
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earth potential! Electrical danger!
The highest voltage that may be applied to the jacks
- COM jack J
- jack for V and Ω I
of the BENNING CM 8 against ground is 600 V.
- Select the desired function (V AC / DC) by means of the rotary switch 8 of
the BENNING CM 8.
- Select the voltage type direct voltage (DC) or alternating voltage (AC) to be
measured by means of the blue key 5 of the BENNING CM 8.
- Connect the black safety measuring lead to the COM jack J of the
BENNING CM 8.
- Connect the red safety measuring lead to the jack for V and Ω 9 of the
BENNING CM 8.
- Bring the safety measuring leads into contact with the measuring points and
read the measured value on the digital display 1 of the BENNING CM 8.
- In the AC range, it is possible to switch over to the frequency measuring
mode by pressing the „PEAK/ Hz-THD" key 7 for approx. 2 seconds. You
can switch back by pressing the key for another 2 seconds. Normal pressing
of the key switches the device into the THD mode (%harmonic distortion).
See figure 2:
02/ 2019
Resolution
0.1 °C
1 °C
Resolution
0.1 °F
1 °F
DC voltage measurement
BENNING CM 8
eff
Measuring accuracy*
± (1 % of the measured value + 3 °C)
± (1 % of the measured value + 3 °C)
Measuring range: - 60 °C to 200 °C
Measurement accuracy: ± 2 °C
eff
Measuring accuracy*
± (1 % of the measured value + 6 °F)
± (1 % of the measured value + 6 °F)
Measuring range: - 76 °F to 392 °F
Measurement accuracy: ± 36 °F
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