CEM 9702 User manual

12
I.Safety Information
The following safety information must be observed to insure maximum
personal safety during the operation at this meter:
Do not use the meter if the meter or test leads look damaged, or if you
suspect that the meter is not operating properly.
Never ground yourself when taking electrical measurements. Do not
touch exposed metal pipes, outlets, fixtures, etc., which might be at
ground potential. Keep your body isolated from ground by using dry
clothing, rubber shoes, rubber mats, or any approved insulating material.
Turn off power to the circuit under test before cutting, unsoldering, or
breaking the circuit. Small amounts of current can be dangerous.
Use caution when working above 60V dc or 30V ac rms. Such voltages
pose a shock hazard.
When using the probes, keep your fingers behind the finger guards on
the probes.
Measuring voltage which exceeds the limits of the multimeter may
damage the meter and expose the operator to a shock hazard. Always
recognize the meter voltage limits as stated on the front of the meter.
SAFETY SYMBOLS
!Indicates operators must refer to the explanation in this manual.
Indicates terminals at which dangerous voltage maybe present.
WARNING
To avoid electrical shock hazard or damage to the meter, Don’t apply input
which exceed the limit shown below:
Function Terminal Input limits
DCV/ACV “V/
Ω
/Hz” 600V dc or ac rms.
Ω
/Continuity/Diode/Cap. “V/
Ω
/Hz” 250V dc or ac rms.
Freq / Duty “V/
Ω
/Hz” 250V dc or ac rms.
II. Features
1. Accurate DC/AC digital clamp meter for current measurement.
2. 10mA high resolution on 40A DC/AC range.
3. One touch zero adjustment for DC Current measurement.
4. 23mm diameter jaw.
5. 4000 counts LCD display with function indication
6. 40A, 200A DCA/ACA clamp meter with function of DCV, ACV, OHM,
Frequency, Duty cycle, Diode, Capacitance and Continuity
measurements.
7. Auto-ranging for DC/AC voltage, Resistance, Frequency, Duty cycle
and Capacitance measurement.
8. Auto power off
9. Data Hold function

34
Ⅲ
. Panel Description
1. Transformer Jaw
This is used to pick up current signal. To measure DC/AC current,
conductor must be enclosed by the jaw
2. Transformer Trigger
This is used to open the jaw
3. Function Selector Switch
This is used to select the function user desired, such as DCA, ACA,
DCV, ACV, Hz/Duty, Ohm / Diode / Continuity / Capacitance
measurement.
4. ON/OFF Switch
This is used to turn the power on or off
5. Data Hold Button
Once this button is pushed, reading shall be held on the LCD, Press
again to release it.
6. Zero Button
Once this button is pressed, the current reading shall be set to zero.
The function is also used to remove offset value caused by the residual
magnetism remained in the core for the DC current measurement.
7. LCD
This is a 3 3/4 digit Liquid Crystal Display with maximum 3999 counts
and function indication.
8. Low Battery Symbol
When this symbol appears, it means the battery voltage drops below the
minimum required voltage. Refer to Section V for battery replacement
9. V ΩHz Input Terminal
This terminal is used as input for voltage. Ohm/ Frequency, Duty cycle,
Diode, Capacitance and Continuity measurements.
10. COM Terminal
This terminal is used as common reference input
11. Hand Strap
Put your hand through the hole of hand strap to avoid.
Ⅳ
. Specification (22℃～28℃)/(71℉～82℉)
Maximum Voltage: 600V rms. (Between any terminal and earth ground)
Safety: Designed to Protection Class Ⅱrequirement of EN61010-1
over-voltage Category Ⅱ( C AT Ⅱ).
Display: 4000 counts LCD display with function indication
Polarity: Automatic, (-) negative polarity indication.
Overrange: “OL” mark indication.
Low battery indication: The “BAT” is displayed when the battery voltage
drops below the operating level.

56
Measurement rate: 2 times per second, nominal.
Auto power off : Meter automatically shuts down after approx. 30 minutes of
inactivity.
Operating environment: 0
℃
to 50
℃
at<70% relative humidity.
Storage temperature: -20
℃
to 60
℃
at<80% relative humidity.
Power: One 9V, NEDA1604, IEC6F22 Battery.
Dimensions: 181.0x43.0x30.3mm
Weight: Approx.: 225g.
Accuracy is given at 23
℃
±5
℃
, less than 70% RH
DC Current:
Range
Resolution
Accuracy
40A
0-20A
10mA
±
3.0%
±
6dgts
20A-40A
10mA
±
5.0%
±
6dgts
200A
100mA
±
3.5%
±
3dgts
One touch Zero for offsets adjustment
Maximum Input: 200A DC Max.
AC Current:
Range Resolution
Accuracy
50~60Hz
60~100Hz
100~400Hz
400~1000Hz
0-20A 10mA ±3%±4dgts ±3%±7dgts ±3%±10dgts ±3%±30dgts
20-40A
10mA
±
5%
±
4dgts
±
5%
±
7dgts
±
5%
±
10dgts
±
5%
±
30dgts
200A 100mA ±3.5%±4dgts ±3.5%±7dgts ±3.5%±
10dgts
±
3.5%±
30dgts
Frequency Range: 40 to 1000 Hz
Maximum Input: 200A AC rms. Max.
DC Voltage (Auto-ranging)
Range
Resolution
Accuracy
400.0mV
0.1mV
±
0.8% of rdg
±
2 dgts
4.000V
1mV
±1.0% of rdg±2 dgts
40.00V
10mV
400.0V
100mV
600V
1V
±
1.5% of rdg
±
2 dgts
Input Impedance: 10MΩ.
Maximum Input: 600V dc or 600V ac rms.
AC Voltage (Auto-ranging)
Range
Resolution
Accuracy
4.000V
1mV
±1.5% of rdg±3 dgts
40.00V
10mV
400.0V
100mV
600V
1V
±
2.0% of rdg
±
4 dgts
Input Impedance: 10MΩ.
Frequency Range: 40 to 400Hz
Maximum Input: 600V dc or 600V ac rms.
Resistance (Auto-ranging)
Range
Resolution
Accuracy
400.0
Ω
0.1
Ω ±
1.2% of rdg
±
4 dgts
4.000k
Ω
1
Ω
±1.2% of rdg±2 dgts
40.00k
Ω
10
Ω
400.0k
Ω
100
Ω
4.000M
Ω
1k
Ω
40.00M
Ω
10k
Ω ±
2.0% of rdg
±
3 dgts
Input Protection: 250V dc or 250V ac rms.

78
Capacitance (Auto-ranging)
Range
Resolution
Accuracy
4.000nF
1pF
±
6.0% of rdg
±
15 dgts
40.00nF
10pF
±
6.0% of rdg
±
10 dgts
400.0nF
0.1nF
±3.5% of rdg±5 dgts
4.000uF
1nF
40.00uF
10nF
200.0uF
0.1uf
±
6.0% of rdg
±
10 dgts
Input Protection: 250V dc or 250V ac rms.
Frequency (Auto-ranging)
Range
Resolution
Accuracy
9.999Hz
0.001Hz
±1.2% of rdg±8 dgts
99.99Hz
0.01Hz
999.9Hz
0.1Hz
±0.8% of rdg±3 dgts
9.999kHz
1Hz
99.99kHz
10Hz
999.9kHz
100Hz
9.999MHz
1kHz
±2.0% of rdg±8 dgts
Sensitivity: 0.8V RMS min. at >20%, <80% duty cycle and <100kHz;
5.0V RMS min. at >20%, <80% duty cycle and > 100kHz;
Effect Reading: More than 100 digits at pulse width > 2uSec.
Overload protection: 250V dc or ac rms.
Duty Cycle
Range
Resolution
Accuracy
0.1%~99.9%
0.1%
±
1.2% of rdg
±
2 dgts
Pulse width: >100us, <100ms.
Overload protection: 250V dc or ac rms.
Diode Te st
Test current
Resolution
Accuracy
0.3 mA typical
1 mV
±
10% of rdg
±
5 dgts
Open circuit voltage: 1.5V dc typical
Overload protection: 250V dc or ac rms.
Audible continuity
Audible threshold: Less than 30Ω
Test current: <0.3mA
Overload protection: 250V dc or ac rms.
Ⅴ
. Operation Instructions
Before taking any measurements, read the Safety Information Section.
Always examine the instrument for damage, contamination (excessive dirt,
grease, etc.) and defects. Examine the test leads for cracked or frayed
insulation. If any abnormal conditions exist do not attempt to make any
measurements.
ZERO BUTTON:
For DCA, ACA and Capacitance Zero & offset adjustment.
It also can be used on DCV 400.0mV and ACV 4.000V range for offset
adjustment.

910
Hz/% OR OHM/DIODE/CONTINUITY/CAPACITANCE SELECTING
BUTTON:
Push this button to select ohm/diode/continuity/capacitance measuring
function when the function switch is set at ohm/diode/buzzer/capacitance
position.
Push this button to select Hz/%(duty cycle) measuring function when the
switch is set at Hz/% duty cycle position.
DATA HOLD BUTTON:
When this button is pushed, the display will show the last reading and “HOLD”
symbol will appear until pushing it again.
Data holding will be canceled automatically when the function switch is
rotated.
DC/AC Current Measurements
WARNING: Make sure that all the test leads are disconnected from
the meter’s terminals for current measurement
1. DC Current
a. Set the rotary switch at 40A DC or 200A DC.
b. Push the Zero Button to stop the reading at zero. If the reading is not
stopped at zero, release the button a while and push it again.
c. Press the trigger to open the jaw and fully enclose the conductor to be
measured. No air gap is allowed between the two half jaws.
d. Read the measured value from the LCD display.
e. Make sure that the offset value caused by the residual magnetism is
still removed. If the new offset value is produced, remove it with the
zero button and make a new measurement again according to the “c”
and “d” (If the current to be measured is larger than the current to be
measured before, or the direction of current changes, the new offset
value will be produced)
2. AC Current
a. Set the rotary switch at 40A AC or 200A AC.
b. Press the trigger to open the jaw and fully enclose the conductor to be
measured. No air gap is allowed between the two half jaws.
c. Read the measured value from the LCD display.
DC/AC Voltage Measurements (Auto-ranging)
1. DC Voltage
a. Set the rotary switch at DCV.
b. Insert the test leads into the input jack.
c. Connect the test probe in parallel to the circuit to be measured.
d. Read the measured value from the LCD display.
2. AC Voltage
a. Set the rotary switch at VAC.

11 12
b. Insert the test leads into the input jack.
c. Connect the test probe in parallel to the circuit to be measured.
d. Read the measured value from the LCD display.
WARNING: Before taking any in-
circuit resistance
measurement, remove power from the circuit being tested
and discharge all the capacitors.
Resistance, Diode, Continuity and Capacitance Measurement
1. Set the rotary switch at “
Ω
/diode/continuity/capacitance” position
2. Insert the test leads into the input jack.
3. Connect the test probes to the two ends of the resistor/diode/capacitor or
circuit to be measured.
4. Make sure all the power of the circuit to be measured is off.
5. To select the diode/continuity/capacitance test, touch the mode
selection switch (ohm/diode/continuity/capacitance) and the
“diode/continuity/nF” mark will be indicated on the display. When you
touch the switch again, the mode will be changed to another test mode.
6. Read the measured value from the LCD display.
7. When on the continuity range, a beeping sound shall be heard if the
resistance is lower than 100
Ω
.
8. When measuring the forward voltage across diode a normal diode will
indicate 0.4V to 0.7V and the reverse voltage will indicate “OL” (same
as on open condition). For a short-circuited diode, a value near 0 mV
will be displayed.
9. When checking in-circuit capacitance, be sure that the circuit has all
power removed and all capacitor are fully discharged. The range
control mode in capacitance measurement is auto-ranging.
Frequency Measurement
1. Connect the black test lead to the COM jack and the red test lead to the
“V/
Ω
/Hz” jack.
2. Set the function switch to “Hz/% duty” range.
3. Connect the test leads to the circuit to be measured. The range will change
that will display the measured frequency with the best resolution.
4. When you push the “HZ/%” button, the mode changes to the duty cycle
check mode.
NOTE:
The input voltage should be between 800mV and 10V rms. ac. If the voltage is
more than 10V rms., reading may be out of the accuracy range.
Duty Cycle measurement
1. Connect the black test lead to the COM jack and the red test lead to the
“V/
Ω
/Hz” jack.

13 14
2. Set the function switch to “Hz/% duty”.
3. Push the “Hz/%” button changing the function to % duty cycle.
4. Connect the test leads to the circuit to be measured. The range will change
that will display the measured duty cycle with the best resolution.
NOTE:
The input voltage should be between 900mV and 10V rms. If the voltage is
more than 10V rms., reading may be out of the accuracy range.
Ⅵ
. Battery Replacement
When the low battery symbol is displayed on the LCD, replace the old battery
with one new battery.
A. Turn the power off and remove the test leads from the clamp meter
B. Remove the screw of the battery compartment.
C. Slide off the battery compartment.
D. Remove the old battery.
E. Insert one 9V NEDA1604, IEC6F22 battery.
F. Replace the battery compartment and secure the screw
DCAC CLAMP METER
Model 9702
OPERATING INSTRUCTION

15 16
TABLE OF CONTENTS
Ⅰ. Safety Information
Ⅱ. Features
Ⅲ. Panel Description
Ⅳ. Specifications
Ⅴ. Operation Instructions
DC/AC Current Measurements
DC/AC Voltage Measurements
Resistance, Diode, Continuity and Capacitance Measurement
Frequency and Duty Cycle Measurement
Ⅵ. Battery Replacement