Center 222 User manual

600V CAT II
300V CAT III
A
V
600V CAT II
COM
300V CAT III
Press
2 Sec
600V
PEAK
V
ZERO
AOFF
600A
HOLD
MINI AC/DC CLAMP METER

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
Instrument Familiarization………………………………...4
Button Instruction…………………………………………..5
IV. Measuring Instruction…………………...………6
4.1 ACA measurement…………………………………. 6
4.2 DCA measurement……...…………………………. 7
4.3 ACV measurement…………………………….…… 8
4.4 DCV measurement…………...……………….…… 9
4.5 Resistance measurement……………...………… 10
4.6 Continuity Test……………………………………...11
V. Battery Changing………………………………… 12
VI. Maintenance……………………………………….. 12

MINI CLAMP METER Instruction Manual
1
I. Safety Information
Do not operate the tester if the body of meter or the test
lead look broken.
Check the main function dial and make sure it is at the
correct position before each measurement.
Do not perform resistance and continuity test on a live
power system.
Do not apply voltage between the test terminals and test
terminal to ground that exceed the maximum limit refer in
this manual.
Exercise extreme caution when measuring live system with
voltage greater than 60V DC or 30VAC.
Keep the fingers after the protection ring when measuring
through the test lead.
Change the battery when the symbol appears to avoid
incorrect data.
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
Explanation of Symbols:
Attention refer to operation Instructions.
Dangerous voltage may be present at terminals.
This instrument has double insulation.
Approvals:EN61010 600V CAT II 300V CAT III

MINI CLAMP METER Instruction Manual
2
II. Specification
General Specification:
Digital Display:
4 digits LCD display with maximum reading 9999
Over Load:
When the signal input is larger than the maximum will be
show “OL”.
Sample Rate:
2 times/sec
Peak Hold Sample Rate:
10ms at DCV, DCA
Low Power Indication:
When the battery is under the proper operation range,
symbol will appear on the LCD display.
Auto Power Off:
The meter will power it self OFF if there is no push button
or rotary switch operation for 30 minutes.
Power Source: UM-4 orAAA1.5V battery x 2.
Battery Life: 50 hr approx. (alkaline battery)
Clamp opening size: 25mm
Dimension (L x W x H) :
189x70x34mm, 7.44x2.76x1.33 inch
Weight: 220g( include battery)
Accessory:
Instruction Manual, Carrying Case, Test lead, Battery
1.5Vx2

MINI CLAMP METER Instruction Manual
3
Electrical Specification:
The accuracy specification is defined as
±
( …%reading
＋
…count )
At 23 ±5℃, ≦80 %RH
ACA
Range Resolution Accuracy ( 50Hz~500Hz) Overload Protection
600A 0.1A 2%+10 660Arms
DCA
Range Resolution Accuracy Overload Protection
600A 0.1A 2.5%+10 660Arms
ACV
Range Resolution Accuracy (50Hz~500Hz) Overload Protection
600V 0.1V 1.5%+5 660Vrms
DCV
Range Resolution Accuracy Overload Protection
600V 0.1V 1%+2 660Vrms
Ohm ( Ω)
Range Resolution Accuracy MAX Test Voltage Overload Protection
1000
Ω
0.1
Ω
1%+3 3V
DC
660Vrms
Continuity ( )
Range Active Region MAX Test Voltage Overload Protection
<100 Ohm 3V
DC
660Vrms

MINI CLAMP METER Instruction Manual
4
III. Instrument Familiarization:
Symbol Definition:
Instrument Familiarization:
Ohm Indicator
Voltage Indicator
Ampere Indicator
Continuity
Peak Hold
Low Battery
Alternate/Direct Signal
Digital Reading
600V CAT II
300V CAT III
A
V
600V CAT II
300V CAT III
5
4
COM
Press
3
V
A
2 Sec
2
1
600V 6
8
PEAK
ZERO
OFF
9
7
HOLD
600A
Auto Power Off
Indicator
Data Hold
Relative Indicator

MINI CLAMP METER Instruction Manual
5
○
1Current Sensing Clamp ○ 6Positive input terminal
○
2Safety protection ring ○ 7Function select dial
○
3Clamp opening handle ○ 8Peak / Data hold button
○
4LCDdisplay ○ 9Zero button
○
5COM input terminal
Button Instruction:
Zero Button
Press Zero button to enter the Zero mode, “△” annunciate
turn on and Zero the display and the reading is stored as
reference value for subsequent measurement.
Press it again, to exit the zero mode.
Data Hold & Peak Hold Button
The user may hold the present reading and keep it on the
display by pressing the “Hold ” button.
When the hold data is no longer needed, one may release
the data-hold operation by press “ Hold “ button again.
One may hold present reading by press the hold button
instantaneously. One may also change the peak hold
function by press and hold the “ PEAK ” button. When the
symbol display, the user should release the button and
function will stay at the peak hold mode. If the user press
and hold the button for more than 2 seconds, the tester will
be in normal mode again.
Note:This meter is built with peak hold function at ACA,
DCA, ACV, DCV ranges.
Disable Auto power off
Press and hold “ ZERO ” button and then the power on the
meter, the symbol will disappear.

MINI CLAMP METER Instruction Manual
6
300VCATIII
600VCATII
V
A
300VCATIII
600VCATII
COM
Press
V
A
2Sec
600V
PEAK
ZERO
OFF
HOLD
600A
300V CAT III
600V CAT II
V
A
300V CAT III
600V CAT II
COM
Press
V
A
2 Sec
600V
PEAK
ZERO
OFF
HOLD
600A
IV. Measuring Instruction:
4.1 ACA measurement:
Switch the function selector to A~ range.
Open the clamp by pressing the jaw-opening handle and
insert the cable to be measured into the jaw.
Close the clamp and get the reading from the LCD panel.
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

MINI CLAMP METER Instruction Manual
7
4.2 DCA measurement:
Switch the function selector toA rang.
Press ZERO button to enter the zero reading.
Open the clamp by pressing the jaw-opening handle and
insert the cable to be measured into the jaw.
Close the clamp and get the reading from the LCD panel.
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.
300VCATIII
600VCATII
V
A
300VCATIII
600VCATII
COM
Press
V
A
2Sec
600V
PEAK
ZERO
OFF
HOLD
600A

MINI CLAMP METER Instruction Manual
8
4.3 ACV Measurement:
WARNING!
Maximum Input Voltage is 600V AC/DC. Do not attempt to
Take any voltage measurement that may exceed to avoid
Electrical shock hazard and/or damage to this instrument.
Switch the function selector to V ~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.
OFF
600A
600V
300V CAT III
600V CAT II
COM
ZERO
V
V
A
A
Press
2 Sec PEAK
HOLD
300V CAT III
600V CAT II

MINI CLAMP METER Instruction Manual
9
4.4 DCV measurement:
Switch the function selector to Vrange.
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.
600A
600V
300V CAT III
600V CAT II
COM
V
A
A
Press
2 Sec PEAK
300V CAT III
600V CAT II

MINI CLAMP METER Instruction Manual
10
4.5 Resistance measurement:
Switch the function selector to range.
Connect red test lead to “+” terminal and black one to the
“ COM ” terminal.
Connect tip of the test leads to the points where the value
of the resistance is needed.
Read the result from the LCD panel.
Note:
When take resistance value from a circuit system, make
sure the power is cut off and all capacitors need to be
discharged.
COM
600V
300V CAT III
600V CAT II
600V CAT II
300V CAT III 600A
HOLD
PEAK
Press
2 Sec OFF
V
A
V
A
ZERO

MINI CLAMP METER Instruction Manual
11
COM
600V
300V CAT III
600V CAT II
600V CAT II
300V CAT III 600A
HOLD
PEAK
Press
2 Sec OFF
V
A
V
A
ZERO
4.6 Continuity Test:
Switch the function selector to range.
Connect red test lead to “+” terminal and black one to the
“ COM ” terminal.
Connect tip of the test leads to the points where the
conducting condition needed.
If the resistance is under 100Ω, the beeper will sound
continuously.
Beeper
600V
600V CAT II
300V CAT III
COM
600V CAT I I
300V CAT III 600A
HOLD
PEAK
Press
2 Sec OFF
V
A
V
A
ZERO

MINI CLAMP METER Instruction Manual
12
V. Battery Changing:
1.When the battery voltage drop below proper operation
range the symbol will appear on the LCD display
and the battery need to changed.
2.Before changing the battery, switch the function selector
to “OFF ” and disconnect test leads.
Open the back cover by a screwdriver. Replace the old
batteries with two UM-4 or AAA size batteries.
3.Close the back cover and fasten the screw.
VI. Maintenance:
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 make current measurement, keep the cable at
the center of the clamp to get more accurate reading.
CLEANING
Periodically wipe the case with a dry cloth and without
detergent. Do not use abrasives or solvents on this
instrument.

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
222-00