Wavetek Meterman CT-238 User manual

Operator’s Manual
CT-238
AC/DC Current Probe
• Bedienungsanleitung
• Manuel d’Utilisation
Manual Revision 08/00
Manual Part Number 1566235
Information contained in this manual
is proprietary to Wavetek Meterman
and is provided solely for instrument
operation and maintenance. The
information in this document may
not be duplicated in any manner
without the prior approval in writing
from Wavetek Meterman.
Specifications subject to change.
Wavetek is a trademark of
Wavetek Wandel Golterman
© Wavetek Meterman, 2000
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Wavetek Meterman
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Everett, WA 98203
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Fax: [phone]
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Wavetek Meterman
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CT238.Man.08.00 11/29/00 8:30 PM Page 1
Wavetek Meterman Ac Dc Current Probe Operators Manual Full download: http://manualplace.com/download/wavetek-meterman-ac-dc-current-probe-operators-manual/ This is the cut pages sample. Download all 20 page(s) at: ManualPlace.com

–1 –
WARRANTY
The CT238 Current Clamp is warranted against any defects of material or
workmanship within a period of one (1) year following the date of purchase of
the multimeter by the original purchaser or original user.
Any multimeter claimed to be defective during the warranty period should be
returned with proof of purchase to an authorized Wavetek Meterman Service
Center or to the local Wavetek Meterman dealer or distributor where your
multimeter was purchased. See maintenance section for details.
Any implied warranties arising out of the sale of a Wavetek Meterman
multimeter, including but not limited to implied warranties of merchantability
and fitness for a particular purpose, are limited in duration to the above stated
one (1) year period. Wavetek Meterman shall not be liable for loss of use of the
multimeter or other incidental or consequential damages, expenses, or
economical loss or for any claim or claims for such damage, expenses or
economical loss.
Some states do not allow limitations on how long implied warranties last or the
exclusion or limitation of incidental or consequential damages, so the above
limitations or exclusions may not apply to you.
Thiswarrantygivesyouspecificlegalrights,andyoumayalsohaveotherrights
which vary from state to state.
WARNINGS AND PRECAUTION
PLEASE READ SECTION 2 – SPECIFICATION BEFORE OPERATING
THE INSTRUMENT
Exceeding the maximum limits of this instrument is DANGEROUS.
Exceeding these limits will expose you to physical injury or even death and will
almost certainly damage your instrument. Even low-level voltages and currents
are capable of causing serious injury or even death.
Please do not use this or any piece ot test equipment without proper training.
Individual functions and ranges have different overload limits. It is VERY
IMPORTANT that you make yourself aware of these overload limits. Check the
specifications of these overload limits.
OPERATING INSTRUCTIONS
CONTENTS
Warranty Statement Page 1
1 INTRODUCTION Page 2
2 SPECIFICATIONS
2.1 Electrical Data Page 3
2.2 General Data Page 3
3 OPERATING INSTRUCTIONS
3.1 Switch On Page 3
3.2 Zero Adjustment Page 3
3.3 Current Measurement Page 3
4 SAFETY Page 4
5 BATTERY REPLACEMENT Page 4
6 FACTORY SERVICE Page 4
7 FREQUENCY RESPONSE
AND ACCURACY CURVES Page 6
International Electrical Symbols
Caution! Refer to this manual before using
the probe.
Probe is protected by Reinforced or Double
Insulation.
–2 –
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 ± 1°C)
Nominal current In 20 A r.m.s
Measuring range 0 to ±30 A
Overload capacity 500A
Overall DC accuracy ±1% of reading ±2mA
AC accuracy, <1kHz ±1% of reading ±2mA
1kHz to 20kHz ±3% or reading ±2mA
Resolution ±1mA
Typical output noise level 200µV r.m.s.
Gain variation ±0.01% of reading/°C
Output sensitivity 100mV/A
Frequency range DC to 20 kHz
di / dt following 20A/µs
Response time better than 1 µs
Dielectric strength 3.7kV rms 50Hz 1 min
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 0°C to +50°C
Storage temp., battery removed 20°C to +85°C
Power supply 9 V Alkaline battery PP3,
NEDA 1604 or IEC6F22
Battery life 30 hours typical
Load impedance (minimum) > 10kΩand ≤100pF
Conductor size 19 mm diameter
Jaw opening 20 mm max.
Weight 250 g.
Output cable and connectors 1.5m long terminated with 4mm safety
plugs.
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
Theoutputzerooffsetvoltageoftheprobemay change due to thermal shiftsand
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
CT238.Man.08.00 11/29/00 8:30 PM Page 1
Wavetek Meterman Ac Dc Current Probe Operators Manual Full download: http://manualplace.com/download/wavetek-meterman-ac-dc-current-probe-operators-manual/ This is the cut pages sample. Download all 20 page(s) at: ManualPlace.com