Center 201 User manual

201
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
Button instruction………………………………………..5
IV. Measuring Instruction……………...……...6
4.1 AC Current Measurement………………………...………..6
4.2 DC Current Measurement……………………………...…..7
4.3 AC Voltage Measurement……………………………...….. 8
4.4 DC Voltage Measurement………………………………....9
4.5 Resistance Measurement………………………………..10
4.6 Continuity Test………………………………………………..11
V. Battery Changing……………………………..12
VI. Maintenance………………………………………13

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 record 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
Installation Categories II
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
1

II. Specification
General Specification:
Digital Display:
3 3/4 digits LCD display with maximum reading 3999
Analog Display:
42 segments fast analog bar display
Symbol and Scale range:
Adjust automatically according range and input signal
Polarity:
When negative signal in apply to the tester, will show.
Over Load:
When the signal larger than the maximum will be show
Sample Rate:
2 times/sec for digital data
20 times/sec for analog bar
Low Power Indication:
When the battery is under the proper operation range,
will appear on the LCD display.
Power Source: UM-4 orAAA 1.5V battery x 2.
Power life: Approx. 50hr (Alkaline Battery )
Auto Power Off:
If there is no key or dial operation for 30 minutes, the meter
will power itself off to save battery consumption. This
function can be disabled by press and hold the ZERO
button then power the unit on.
Clamp opening size: 30mm
Dimension (L x W x H) :
193 x 50 x 28mm, 7.60 x 1.97 x1.1 inch
Weight: 240g, 8.46OZ ( include battery)
Accessory:
Instruction Manual, Leather Case, Test lead, Battery 1.5Vx2
2

Electrical Specification:
The accuracy specification is defined as
±
( …%reading
＋
…count )
At 23±5℃, ≦80 %RH
DCV (Autorange)
Range Resolution Accuracy Input Impedance Overload Protection
400V 0.1V
600V 1V 1%+2 10M
Ω
660Vrms
ACV (Autorange)
Accuracy
Range Resolution 50Hz~500Hz Input Impedance Overload Protection
400V 0.1V
600V 1V 1.5%+5 10M
Ω
660Vrms
DCA (Autorange)
Range Resolution Accuracy Overload Protection
40A 0.01A
400A 0.1A 2.5%+10 600Arms
ACA (Autorange)
Range Resolution Accuracy Band Width Overload Protection
40A 0.01A
400A 0.1A 2%+10 50Hz~500Hz 600Arms
Ohm ( Ω)
Range Resolution Accuracy Max. Test Voltage Overload Protection
400
Ω
0.1
Ω
1%+2 1.5VDC 600Vrms
Continuity ( )
Range Active Region Max. Test Voltage Overload Protection
< 40 Ohm 1.5 VDC 600Vrms
3

III. Instrument Familiarization:
4
←Current Sensing Clamp ↑Safety protection ring
→Clamp opening handle ↓Function select dial
°LCD display ±COM input terminal
″Positive input terminal ≥Data hold & Manual Range button
×Zero button ∝Battery cabinet
Symbol Definition:
Low battery indication
Auto range indication
Zero reading indication
Hold Data indication
Continuity function indication
Voltage measurement indication
Current measurement indication
Resistance measurement indication
Analog bar graph indication
Manual range indication
Polarity indication
Direct source indication
Alternative source indication

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, the “△” annunciate blinking and memorized
reference value will display.
Press and hold down zero button for 2 second to exit the
zero mode.
When the tester is under zero mode the auto range function
will be disabled.
Data Hold & Manual Range 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 measuring scale
range by press and hold the ☉RANGE button. When the
decimal point changes, the user should release the button
and scale range will stay at the setting range. If the user
press and hold the button for more than 2 seconds, the
tester will be in auto range mode again.
Disable Auto power off
Press and hold “ ZERO ” button and then the power on the
meter.
5

IV. Measuring Instruction:
4.1 AC Current Measurement:
Switch the main function selector to A range.
Open the clamp by pressing the jaw-opening handle and
insert the cable to be measured into the jaw.
6
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.
4CORRECT
7 INCORRECT

4-2 DC Current Measurement
Switch the main function selector toA rang.
Press ZERO button to enter the zero reading.
Before measuring current larger than 40A, adjust the
scale to 400A range by press the range button then
perform auto zero operation.
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.
7

4.3 AC Voltage 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 main 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.
8

4.4 DC Voltage 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 main 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.
9

4.5 Resistance Measurement:
Switch the main function 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.
10

4.6 Continuity Test:
Switch the main function to range.
11
Connect red test lead to “+” terminal and black one to the
“ COM ” terminal.
Connect tip of the test leads to the points where the
conduction condition needed.
If the resistance is under 40Ω, the beeper will sound
continuously.
Beeper
©Shortcircuit ©Open circuit

V. Battery Changing:
WARNING!
To prevent electrical hazard or shock, turn off clamp meter
and disconnect test leads before removing battery cover.
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 main dial to
“OFF ”.
Open the cover of the battery cabinet by a screwdriver.
Replace the old batteries with two UM-4 or AAA size
batteries.
3.Close the battery cabinets cover and fasten the screw.
12

VI. Maintenance:
WARNING!
Before open the battery door, disconnect both test lead
and never uses the meter before the battery door 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
only by qualified personal.
CLEANING
Periodically wipe the case with a dry cloth and detergent.
Do not use abrasives or solvents on this instruments.
13

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
201-01