Introduction; Specifications; Electrical Data; General Data - Wavetek Meterman CT-238 Bedienungsanleitung

1. INTRODUCTION

The CT-238 current probe has been designed for use with multimeters for
accurate, non-intrusive measurement of both AC, DC and complex waveform
currents.
Using advanced Hall Effect technology the CT-238 can accurately measure
currents with a resolution of 1mA from 5mA to 30 Amps over the frequency
range of DC to 20 kHz.
These features make it a powerful tool for use in inverters, switch mode power
supplies, industrial controllers and other applications requiring current
measurement and/or waveform analysis.
2. SPECIFICATION

2.1 Electrical data

(All accuracies stated at 23°C
Nominal current In
Measuring range
Overload capacity
Overall DC accuracy
AC accuracy, <1kHz
Resolution
Typical output noise level
Gain variation
Output sensitivity
Frequency range
di / dt following
Response time
Dielectric strength
Safety: Meets EN61010-1 Cat III 300V; EN61010-2-032
EMC: Meets EN50081-1, EN50082-1
EMC: This product complies with requirements of the following
European Community Directives: 9/336/EEC (Electromagnetic Compatibility)
and 73/23/EEC (Low Voltage) as amended by 93/68/EEC (CE Marking).

2.2 General data

Operating temperature
Storage temp., battery removed
Power supply
NEDA 1604 or IEC6F22
Battery life
Load impedance (minimum)
Conductor size
Jaw opening
Weight
Output cable and connectors
3. OPERATING INSTRUCTIONS
Refer to Fig. 1 (page 3)
3.1 Switch On
When the probe is switched on the red LED will illuminate. The LED starts
flashing when the battery voltage is too low for normal operation and warns the
user that it requires changing. This procedure is described in Section 5.

3.2 Zero Adjustment

The output zero offset voltage of the probe may change due to thermal shifts and
other environmental conditions. To adjust the output voltage to zero depress
the thumbwheel and rotate. Ensure that the probe is away from the current
carrying conductor whilst the adjustment is made.

3.3 Current Measurement

Switch on the probe using the On - Off switch and check that the LED is lit.
Connect the output lead to a multimeter.
If necessary adjust the probe output voltage to zero as described in section 3.2
Clamp the jaws of the probe round the conductor ensuring a good contact
between the closing faces of the jaws.
Observe and take measurements as required. Positive output indicates that the
± 1°C)
20 A r.m.s
0 to ±30 A
500A
±1% of reading ±2mA
±1% of reading ±2mA
1kHz to 20kHz
±1mA
200µV r.m.s.
±0.01% of reading/°C
100mV/A
DC to 20 kHz
20A/µs
better than 1 µs
3.7kV rms 50Hz 1 min
0°C to +50°C
20°C to +85°C
9 V Alkaline battery PP3,
30 hours typical
> 10kΩ and ≤100pF
19 mm diameter
20 mm max.
250 g.
1.5m long terminated with 4mm safety
plugs.
– 2 –
±3% or reading ±2mA