REED C-212 User manual

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Model C-212
TRMS AC/DC Clamp Meter
Instruction
Manual

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Table of Contents
Safety ............................................................................................ 3
Features......................................................................................... 4
Specications.............................................................................4-6
Instrument Description ...............................................................7-8
Measurement Procedures ........................................................9-12
Battery Replacement................................................................... 13
Product Maintenance .................................................................. 13
For service on this or any other REED product or information on other
REED products, contact REED Instruments at [e-mail].

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3
Safety
• Read this manual before using the meter and follow all safety guidelines.
• Use the meter only as specied in this instruction manual. Otherwise
the meters protection may be impaired.
• Never use this meter on a circuit with voltages greater than 750Vrms @ 50/60 Hz.
• Do not operate the meter if the body or test leads look damaged.
• Check the function selector range switch and make sure it is at the cor-
rect position before each measurement is taken.
• Do not perform resistance and continuity tests on a live circuit.
• Exercise extreme caution when measuring live systems with voltages
greater than 60VCC or 30VCA.
• 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 incorrect 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), II (1000V)
Symbols
Attention! Refer to operation Instructions.
Dangerous voltage may be present at terminals.
This instrument has double insulation.
Approvals: EN61010 600V CAT III 1000V CAT II
When servicing this meter, use only specied replacement parts. For service
(repairs or calibration) on this or any other REED product or information on other
REED products, contact REED Instruments at [e-mail].

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Features
• True RMS measurements
• 3-3/4 digit LCD with high-speed, 42-segment bargraph
• Max/Min and Data Hold functions
• Peak Hold function
• Frequency measurement
• Diode and continuity test with beeper
• Polarity and overload indications
• Auto or manual ranging
• Auto power-off
• Low battery indication
Specifications
General Specification:
Digital Display: 3 3/4 digits LCD display with maximum reading 3999
Analog Display: Fast 40 segment analog bar graph display
Symbol & Scale Range: Automatic display according symbols
and range input signal
Polarity:
is displayed when negative signal applied to the input
Over Load: is displayed when input signal exceeds range
Sample Rate: 2 times/sec for digital data; 20 times/sec for analog bar
Low Battery Indication: is
displayed when the battery
is below the required voltage
Auto Power Off: By default, the meter is in auto power off mode. The
meter will power itself off after 30 minutes without
operation. To disable the auto power off, press and
hold the “MAX/MIN” button and turn the meter on.
Jaw Opening: 40mm
Power Supply: 9V, NEDA1604 or 6F22 or 006P
Battery Life: 40 hours typically (Alkaline)
Dimensions (L x W x H): 9.53 x 2.60 x1.4” (242 x 66 x 36 mm)
Weight: 400g (14.10 oz) with battery
Includes: Carrying case, test leads, 9V battery
and instruction manual
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Electrical Specifications
The accuracy specication is dened as ± (…% of reading+ …count) at
23±5°C,
=
<
80%RH
TRMS for ACV and ACA accuracy are specied from 5% to 100% of the
range. For the accuracy add ±(1% of reading) on Crest Factor 1.4<CF<3
at full scale & CF<6 at half scale.
ACA
Range Resolution Accuracy Overload Protection
40A 0.01A
50 ~ 60Hz
± (1.9% rdg +
5 digits)
60 ~ 500Hz
±(2.5% rdg +
5 digits )
1200Arms400A 0.1A
1000A 1A
DCA
Range Resolution Accuracy Overload Protection
40A 0.01A
± (2.5% reading + 10 digits) 1200Arms400A 0.1A
1000A 1A
ACV (Autorange)
Range Resolution Accuracy Overload Protection
400V 0.1V ± (1.5% reading + 5 digits)
50 ~ 500Hz 1000Vrms
750V 1V
DCV (Autorange)
Range Resolution Accuracy Overload Protection
400V 0.1V ± (1% reading + 2 digits) 1000Vrms
1000V 1V
Ohm (Resistance) (Autorange)
Range Resolution Accuracy Overload Protection
400Ω 0.1Ω ± (1% reading + 2 digits) 600Vrms
4000Ω 1Ω
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(Diode)
Range Test Current Open Circuit Voltage Overload Protection
1.7mA Max. 6V Max. 600Vrms
Continuity
Range Active Region Overload Protection
<100Ω 600Vrms
Frequency (Hz) (Autorange)
Function Range Resolution Sensitivity Accuracy
A-Hz 4KHz 1Hz 2Arms
±(0.1% reading +
1 digits) (20~10KHz)
10KHz 10Hz 5Arms
V-Hz 4KHz 1Hz 5Vrms
±(0.1% reading +
1 digits) (10~10KHz)
10KHz 10Hz 10Vrms

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Instrument Description
1 — Current Sensing Clamp
2 — Clamp opening handle
3 — Function select dial
4 — Hold Button
5 — Peak Hold Button
6 — Maximum Minimum Button
7 — AC/DC Select Button
8 — Relative Button
9 — LCD Display
10 — “COM” Terminal
11 — “ + ” Test Terminal
Display
Auto Power Off indication
Low battery indication
Direct Source indication
Alternative
Positive Peak detect indication
Relative indication
Negative Peak detect indication
Manual range indication
Data Hold indication
Diode function indication
Continuity with beeper
Polarity indication
Analog Bar display
Resistance measure-
ment indication
Voltage & Current
measurement
indication
Frequency measure-
ment indication
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Data Hold Function
Press the “HOLD” button at any time to hold the current reading. To
release the data being held, simply press the “HOLD” button again.
Peak Hold Function
This meter is designed with 1ms peak hold function at ACA, ACV, DCA
and DCV ranges. Before performing a peak hold operation, a calibration
process must be completed rst.
To do this, press and hold the peak button for 2 seconds. “CAL” will dis-
play on the LCD and the offset will be calculated and kept in the meter.
After the calibration is complete, you can choose P+ or P- by pressing
the “PEAK + HOLD” button to keep the peak reading. To return the meter
back to normal operation, press the “PEAK” button for 2 seconds.
When the function range changes, the meter will require another calibra-
tion for peak measurement.
MAX/MIN Function
This meter is designed with a MAX/MIN function at ACA, ACV, DCA and
DCV ranges.
Press the “MAX/MIN” button once to set the meter to the MAX mode.
Press it once again to set the meter to MIN mode. Press it once again and
the meter will display the present reading and will continue tracking the
MAX and MIN changes. This mode will also be indicated with the blinking
“MAX MIN” symbol.
Set the meter back to normal operation by pressing the “MAX/MIN”
button for more than 2 seconds.
REL Function:
This meter is designed with REL function at ACA, ACV and DCV, DCA ranges.
Press the “REL” button to change the zero to the current reading and the
relative value will show on the LCD. Press it once again and the meter
will display the relative zero point. This mode will also be indicated with a
blinking “REL” symbol.
Set the meter back to normal operation by pressing the “REL” button for
more than 2 seconds.

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Measurement Procedures
Current Measurement
Switch the main function selector to proper current range.
ACA
Open the clamp by pressing the jaw-opening handle and insert the cable
to be measured into the jaw. Choose AC current measurement by press-
ing the “AC/DC” button for ACA readings.
DCA
To measure DC current, choose DC measurement by pressing the
“AC/DC” button. Wait for the reading to stabilize then press the “REL”
button to reset the reading. Once completed, insert the cable to be
measured into the jaw and read the value.
Notes: Before taking this measurement, disconnect the test leads from the
meter for safety. If the reading is difcult to read, push the “HOLD” button
and read the result later.
CORRECT
INCORRECT
(2 wires inside)
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Voltage measurement
Switch the main function selector to Voltage Range. Connect the Red test
lead to the “+” terminal and the Black one to the “COM” terminal. Choose
AC or DC by pressing the AC/DC button. Measure the voltage by touching
the test lead tips to the test circuit where the value of voltage is needed.
Read the result on the LCD panel.
Resistance measurement
Switch the main function to the “Ω” range,
verify that the power line is disconnected from
the system. Connect the Red test lead to the
“+” terminal and the Black one to the “COM”
terminal. Connect the tips of the test leads to
the points where the value of the resistance is
needed. Read the result on the LCD panel.
Note: When measuring the resistance value of
a circuit system, make sure the power is off
and all capacitors required are discharged.
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Continuity Test
Switch the main function to
the “ ” range, verify
that the power line is
disconnected from the
system. Connect the Red
test lead to the “+” terminal
and the Black one to the
“COM” terminal. Connect
the tips of the test lead to
the points where the value of
the conduction condition
is needed. If the resistance
is under 100Ω, the beeper
will sound continuously.
Diode Test
Switch the main function to the
“” range, verify that the
power line is disconnected from the
system. Connect the Red test lead to
“+” terminal and the Black one to the
“COM” terminal. Connect the tips of
the Red test lead to the anode side and
the Black test lead to the cathode side
of the diode being tested. Read the
forward Voltage (Vf) value on the
LCD panel.
If the polarity of test leads are reversed
with diode polarity, the digital read-
ing will show “OL”. This can be used
for distinguishing between anode and
cathode terminals of a diode.
Beeper
© Short circuit © Open circuit
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Frequency measurement
from the terminals
Switch the main function to the “Hz”
range. Connect the Red test lead to the
“+” terminal and the Black one to the
“COM”. Connect the tips of the test
leads to the points where the frequency
of the voltage signal is required. Read
the value one the LCD panel.
Frequency measurement
with the clamp
Switch the main function to the “Hz”
range. Open the clamp by pressing
the clamp-opening handle and insert
the cable to be measured into the
clamp. Close the clamp and you will
nd the reading on the LCD panel.
Note: When taking frequency
measurements, you should either use
the terminal signal or clamp signal
but not both. If both sources are
applied an error reading will occur.

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Battery Replacement
1) When the battery voltage drops below the proper operation range the
symbol will appear on the LCD display, indicating that the battery
needs to be changed.
2) Before changing the battery, switch the main function to “OFF” and
disconnect the test leads.
3) Open the back cover using a screwdriver.
4) Replace the old battery with a new 9V battery.
5) Close the back cover and fasten the screws using a screwdriver.
Product Maintenance
WARNING!
Before opening the meter, disconnect both test leads and never use
the meter before the cover has been reinstalled and fastened.
To avoid contamination or static damage, do not touch the circuit
board without proper static protection.
Notes:
• 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 taking current measurements, keep the cable at the center of the
clamp to yield a more accurate test result.
• Repairs or servicing not covered in this manual should be performed
only by qualied personal.
• To clean the meter, periodically wipe the case with a dry cloth. Do not
use abrasives or solvents on these instruments.
For service (repairs or calibration) on this or any other REED product
or information on other REED products, contact REED Instruments at
[email protected].

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14
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