Center 232 User manual

KW
CAT III
600V
ZEROPEAK
V
A
V
OFF
A
HOLD
600V CAT 600AIII
CLAMP METER
AC\DC TRUE RMS & WATT
232

CONTENTS
TITLE PAGE
I. Safety Information ………………………………..…………..….1
Environmental Conditions………………………………….…..….…. 1
Explanation of Symbols……………….………………….…………… 1
II. Specification………..……………………………………………… 2
General Specification……………………...………………………….. 2
Electrical Specification……………………………...………………….3
III. Instrument Familiarization……………..………………………4
Symbol Definition……………………………………………………….4
Part and Position……………….…………………….…………….…..4
IV. Measuring Instruction……………..……….....….……………...5
4.1 Current Measurement…………………...……………...…………5
4.2 Voltage Measurement…………………………...………………...6
4.3 Resistance Measurement& Continuity Test...…………..……... 7
4.4 Power Measurement.…………………………………..……….....8
4.5 Button operation…………………………………………………....8
V. Battery Changing……..……………………………….…………. 9
VI. Maintenance……………..………...……………………………... 10

1
I. Safety Information – Read first
• Read the user manual before use and follow all safety information.
• Use the meter only as specified in this user manual. Otherwise
meter protection may be impaired.
• Never use this meter on a circuit with voltages greater than
650Vrms @ 50/60 Hz.
• Do not operate the meter if the body or tests leads look damaged.
• Check the function selector range switch and make sure it is at the
correct position before each measurement.
• Do not perform resistance and continuity test on a live circuit.
• Exercise extreme caution when measuring live systems with
voltage greater than 60V DC or 30VAC.
• Use extreme care when working around bus bars and bare
conductors.
• Do not use the meter in over range/overload conditions (OL).
• Change the battery when the symbol appears to avoid
erroneous readings.
Environmental Conditions:
Altitude up to 2000 meters.
Operating temperature:
0°C ~ 40°C, <80% RH, non-condensing
Storage temperature: - 10°C ~ 60°C, <70% RH, battery removed
Pollution Degree: 2
Installation Categories III (600V)
Explanation of Symbols:
Attention! Refer to operation Instructions.
Dangerous voltage may be present at terminals.
This instrument has double insulation.
When servicing, use only specified replacement parts.
Approvals:EN61010 600V CAT III

2
II. Specification
General Specification:
Digital Display: 4 digits LCD display with maximum reading 9999
Symbol and Scale range:
Automatic display according symbols and range input signal.
Polarity: Displayed when negative signal applied to the input.
Over Load:
is Displayed when input signal exceeds measuring limit.
Sample Rate: 2.5 times/sec
Low Battery Indication:
displayed when the battery is below the required voltage.
Power Source: 1.5V×2.（UM-4 or AAA size）
Battery Life: about 45 hrs. (Alkaline)
Auto Power Off:
The meter will power itself OFF if there is no push button or rotary
switch operation for 30 minutes.
To deactivate this function, press the “HOLD” button and keep it
pressed down. Then power up the clamp.
Clamp opening size: 30mm
Dimension (L x W x H) :218 x 84 x 30 mm, 8.58 x 3.30 x1.18 inch
Weight: 270g, 9.52OZ (battery included)
Accessory:
Instruction Manual, Carrying Case, Test lead, 1.5V Battery×2

3
Electrical Specification:
The accuracy specification is defined as ±(…%reading＋…count ) At 23
±5℃, ≦80 %RH
True RMS for ACV and ACA accuracy are specified from 5% to 100%
of range. accuracy add ±(1%rdg) on Crest Factor 1.4<CF<3 at full
scale & CF<6 at half scale.
ACA
Range Resolution Accuracy Overload
Protection
600A 0.1A 50 ~ 60Hz
±
( 1.5%rdg + 5dgts ) 60 ~ 500Hz
±
( 2.5%rdg + 5dgts ) 1200App
DCA
Range Resolution Accuracy Overload Protection
600A 0.1A
±
( 1.5%rdg + 5dgts ) 1200App
ACV
Range Resolution Accuracy Input Impedance Overload Protection
600V 0.1V
±
( 1.5%rdg + 5dgts )
50 ~ 500Hz 1M
Ω
1200Vpp
DCV
Range Resolution Accuracy Input Impedance Overload Protection
600V 0.1V
±
( 1%rdg + 5dgts ) 1M
Ω
1200Vpp
KW (Auto ranging)
Range Resolution Accuracy
100KW 0.01KW
AC Power 360KW 0.1Kw
±
( 1.5%rdg + 3dgts )(50~60Hz)
±
( 2.5%rdg + 3dgts )(60~500Hz)
100KW 0.01KW
DC Power 360KW 0.1KW
±
( 1.5%rdg + 3dgts )
Ohm
Range Resolution Accuracy Overload Protection
10000
Ω
1
Ω ±
( 1.5%rdg + 3dgts ) 600Vrms
<100
Ω
600Vrms

4
ZERO
OFF
600V
CAT III
V
KW
PEAK
A
V
A
HOLD
WARNING
IEC 1010 600V CAT I
POLLUTION DEGREE 2
SIZEAAA1.5VX2
INPUTSBEFORE
OPENINGTHECASE.
TOAVOIDELECTRIC
WARNING
REMOVEALLSHOCK
II
10
11
8
9
3
2
1
4
7
6
512
600V CAT 600AIII
III. Instrument Familiarization:
Symbol Definition:
Part and Position :
○
1Current Sensing Clamp
○
2Safety protection ring
○
3Clamp opening handle
○
4Peak Hold Button
○
5Back Light Button
○
6LCD Display
○
7“COM” Terminal
○
8Hold Button
○
9Function select dial
○
10 Zero Button
○
11 “ + ” Test Terminal
Auto range indication
Low battery indication
Direct source indication
A
uto power off indication
A
lternative indication
Polarity indication
Peak detect indication
Data hold indication
Zero indication
Resistance measurement
with continuity beeper
indication
Voltage measurement
indication
Current measurement
indication
Watt measurement indication

5
IV. Measuring Instruction:
4.1 Current Measurement:
ACA
Switch the main function selector to “ACA“ current range.
Open the clamp by pressing the jaw-opening handle and insert the
cable to be measured into the jaw.
DCA
Switch the main function selector to “DCA” range.
Wait for the reading to stabilize then press ZERO button to null the
reading. After these are done, open the clamp by pressing the
jaw-opening handle and insert the cable to be measured into the jaw
and read the value.
Note:
Before this measurement, disconnect the test lead with the meter for
safety.
In some occasion that the reading is hard to read, push the HOLD
button and read the result later.
CORRECT
 INCORRECT
(2wiresinside)
ZERO
OFF
600V
CATIII
V
KW
PEAK
A
V
A
HOLD
600A
III
600VCAT
ZERO
OFF
600V
CAT III
V
KW
PEAK
A
V
A
HOLD
III600V CAT 600A

6
600V
PEAK ZERO
HOLD
OFF
KW
V
V
A
A
600V CAT 600AIII
4.2 Voltage Measurement:
Switch the main function selector to “ACV” or “DCV” range.
Connect red test lead to “+” terminal and black one to the “ COM ”
terminal. Measure the voltage by touch the test lead tips to the test
circuit where the value of voltage is needed.
Read the result from the LCD panel.
DCV measurement
ACV measurement
PEAK ZERO
600V
CAT III
V
KW
A
V
AOFF
HOLD
600V CAT 600AIII

7
600V
PEAK ZERO
KW
V
A
HOLD
OFF
600A600V CATIII
4.3 Resistance Measurement and Continuity Test:
Switch the main function to “ ”
range, check the power line is
disconnected from the system.
Connect red test lead to “+” terminal and
black one to the “ COM ” terminal.
Connect tips of the test leads to the
points where the value of the resistance
is needed.
Read the result from the LCD panel.
If the resistance is under 100Ω, the
beeper will sound continuously.
Note:
When take resistance value from a
circuit system, make sure the power is
cut off and all capacitors need to be
discharged.
Shortcircuit Open circuit
600V
PEAK ZERO
KW
V
A
HOLD
OFF
600A
600V CATIII
600V
PEAK ZERO
KW
V
A
HOLD
OFF
600A
600V CATIII

8
ZERO
OFF
V
KW
PEAK
A
V
A
HOLD
600V
600VCATIII600A
4.4 Power Measurement:
Switch the main function selector to “KW” range.
Open the clamp by pressing the jaw-opening handle and insert the
cable to be measured into the jaw.
Connect red test lead to “+” terminal and black one to the “ COM ”
terminal. Measure the voltage by touch the test lead tips to the test
circuit.
Read the result from the LCD panel.
4.5 Button Operation:
 Data Hold Function:
At any time, the user can hold the present reading by press the
“Hold” button and release the held data by press it again.
 Peak Hold Function:
This meter is built with 10ms peak hold function at ACA, ACV, DCA
and DCV ranges.
The user can press “PEAK” button into Peak Hold mode and exit
Peak Hold mode by press it again.

9
 Back Light Function:
Press the “Back Light” button will turn back light on and Press it once
again will turn off.
The meter will turn back light off if there is no push “Back Light”
button for 30 seconds.
 ZERO Function:
Press the “ZERO” button will change the zero to the present reading
and the relative value will show on the LCD.
Press it once again will set the meter back to normal operation.
V. Battery Changing:
1.When the battery voltage drop below proper operation range the
symbol will appear on the LCD display and the battery needs to be
changed.
2.Before changing the battery, switch the main dial to “OFF ”and
disconnect test leads.
Open the back cover by a screwdriver.
Replace the old batteries with two new 1.5V(AAA Size) battery.
3.Close the back cover and fasten the screw.

10
VI. Maintenance:
WARNING!
Before open the meter, disconnect both test lead and never uses
the meter before the cover is closed.
CAUTION!
To avoid contamination or static damage, do not touch the circuit
board without proper static protection.
*REMARK:
 If the meter is not going to be used for a long time, take out the
battery and do not store the meter in high temperature or high
humidity environment.
 When take current measurement, keep the cable at the center of the
clamp will get more accurate test result.
 Repairs or servicing not covered in this manual should be performed
only by qualified personal.
*CLEANING:
Periodically wipe the case with a dry cloth. Do not use abrasives
or solvents on these instruments.

CENTER TECHNOLOGY CORP.
4 / F NO. 415, Jung-Jeng Rd., 238 Shu-Lin, Taipei, Taiwan
TEL: [phone] E-Mail : [email protected]
FAX : [phone] http : / / www.centertek.com
232-00