PDi CM-220 User manual

CM-220
True RMS AC CLAMP METER
INSTRUCTION MANUAL

2
Safety
International Safety Symbols
This symbol, adjacent to another symbol or
terminal, indicates the user must refer to the
manual for further information.
This symbol, adjacent to a terminal, indicates that,
under normal use, hazardous voltages may be
present
Double insulation
SAFETY NOTES
Do not exceed the maximum allowable input range of
any function
Do not apply voltage to meter when resistance function
is selected.
Set the function switch to OFF when the meter is not in
use.
WARNINGS
Set function switch to the appropriate position before
measuring.
When measuring volts do not switch to
current/resistance modes.
When changing ranges using the selector switch always
disconnect the test leads from the circuit under test.
Do not exceed the maximum rated input limits.

3
CAUTIONS
Improper use of this meter can result in damage, shock,
injury or death. Read and understand this instruction manual
before operating the meter.
Always remove the test leads before replacing the battery.
Inspect the condition of the test leads and the meter itself for
any damage before operating the meter. Repair or replace
any damage before use.
Use great care when making measurements if the voltages
are greater than 25VAC rms or 35VDC. These voltages are
considered a shock hazard.
Remove the battery if the meter is to be stored for long
periods.
Always discharge capacitors and remove power from the
device under test before performing Diode, Resistance or
Continuity tests.
Voltage checks on electrical outlets can be difficult and
misleading because of the difficulty of connecting to the
recessed electrical contacts. Other means should be used
to ensure that the terminals are not "live".
If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment
may be impaired.
Input Limits
Function
Maximum Input
A AC
1000A
V DC, V AC
1000V DC/AC
Frequency, Resistance, Diode,
Continuity , Capacitance Test
1000V DC/AC
Temperature (°C/°F)
--

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Meter Description
1. Current clamp
2. Non-contact AC voltage
indicator light
3. Clamp trigger
4. Data HOLD / BACKLIGHT button
5. Rotary function dial
6. Hz / Hz% function button
7. RANGE select button
8. RELATIVE button
9. MIN/MAX button
10.MODE select button
11.LCD display
12.COM input jack
13.V//CAP/TEMP/Hz input jack
14.Battery Cover
1. AC DC AC(alternating current)
and DC (direct currrent)
2. Minus sign
3. 8.8.8.8 6000 count (0 to 5999)
measurement reading
with 61segments
Analog Bargraph
4. AUTO AutoRange mode
5. REL Relative mode
6. Diode test mode
7. •))) Audible Continuity
8. HOLD Data Hold mode
9. °C,°F, ,m,V,A,K,M,Ω,Units of measure list
10. MAX MIN MAX/MIN mode
11. Hz % Frequency/duty cycle mode

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Specifications
Function
Range &
Resolution
Accuracy (% of reading)
AC Current
(50/60Hz)
600.0 AAC
± (2.8 % + 8 digits)
1000 AAC
± (3.0 % + 8 digits)
AC Current
(400Hz)
600.0 AAC
± (5.0 % + 10 digits)
1000 AAC
± (5.0 % + 10 digits)
DC Voltage
600.0 mVDC
± (0.8% + 2 digits)
6.000 VDC
± (1.5% + 2 digits)
60.00 VDC
600.0 VDC
AC Voltage
(50-400Hz)
6.000 VAC
± (1.8% + 8 digits)
60.00 VAC
600.0 VAC
Resistance
600.0 
± (1.0% + 4 digits)

± (1.5% + 2 digits)



± (2.5% + 3 digits)

± (3.5% + 5 digits)
Capacitance
40.00nF
±(4.0% reading + 20 digits)
400.0nF
±(3% reading + 5 digits)



±(4.0% reading + 10 digits)

±(5.0% reading + 10 digits)
Frequency
Sensitivity:15Vrms
10-10kHz
±(1.5% reading + 2 digits)
Temp
(type-K)
(probe accuracy
not included)
-20.0 to 760.0C
±(3%rdg+5C)
-4.0 to1400.0F
±(3%rdg+9F)

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Clamp size Opening 1.5" (40mm) approx.
Diode Test Test current of 0.3mA typical;
Open circuit voltage 1.5V DC
typical.
Continuity Check Threshold <40;
Test current < 0.5mA
Low Battery Indication displayed
Over Range Indication  is displayed
Measurements Rate 2 per second, nominal
Input Impedance 10M(VDC and VAC)
Display 6000 counts LCD
AC Current 50-400Hz (AAC)
AC Voltage Bandwidth 50-400Hz (VAC)
Operating Temperature 41 to 104oF (5 to 40oC)
Storage Temperature -4 to 140oF (-20 to 60oC)
Operating Humidity Max 80% up to 87F (31C)
decreasing linearly to 50% at
104F(40C)
Storage Humidity <80%
Operating Altitude 7000ft. (2000meters) max.
Over voltage Category III 600V
Battery One 9V Battery
Auto OFF approx. 15 minutes
Dimensions/Weight 232x77x39mm/271g
Safety For indoor use and in
accordance with Overvoltage
Category II, Pollution Degree
2. Category II includes local
level, appliance, portable
equipment, etc., with transient
overvoltage less than
Overvoltage Cat. III

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Ω
Operation
NOTICES: Read and understand all warning and
precaution statements listed in the safety
section of this operation manual prior to using
this meter. Set the Rotary function dial to the
OFF position when the meter is not in use.
AC Current Measurements
WARNING: Ensure that the test leads are disconnected
from the meter before making current clamp measurements.
1. Set the Function dial to the 1000A or 600A range.
2. If the range of the measured is
not known, select the higher
range first then move to the
lower range if necessary.
3. Press the trigger to open jaw.
Fully enclose one conductor to be
measured.
4. Read the current measurement on the LCD display.
DC/AC Voltage Measurements
1. Insert the black test lead into the negative COM terminal
and the red test lead into the positive Vterminal.
2. Set the function dial to the Vposition.
3. Select AC or DC with the MODE button.
4. Connect the test leads in parallel to the circuit under test.
5. Read the voltage measurement on the LCD display.

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Resistance Measurements
1. Insert the black test lead into the negative COM terminal
and the red test lead into the positive terminal.
2. Set the function dial to the position.
3. Touch the test probe tips across the circuit or component
under test. It is best to disconnect one side of the device
under test so the rest of the circuit will not interfere with
the resistance reading.
4. Read the resistance measurement on the LCD display.
Diode and Continuity Measurements
1. Insert the black test lead banana plug into the negative
COM jack and the red test lead banana plug into the
positive diode jack.
2. Turn the rotary dial to the •))) position.
3. Press the MODE  appears in the
display.
4. Touch the test probes to the diode under test. Forward
voltage will indicate 0.4V to 0.7V. Reverse voltage will
OL
and an oOL
5. For Continuity tests, if the resistance is < 40, a tone
will sound.
Capacitance Measurements
WARNING: To avoid electric shock, disconnect power to
the unit under test and discharge all capacitors before
taking any capacitance measurements. Remove the
batteries and unplug the line cords.
Red Black Black Red
Probe Probe Probe Probe
Forward test Reverse test

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1. Set the rotary function dial to the CAPposition.
2. Insert the black test lead banana plug into the negative
(COM) jack. Insert the red test lead banana plug into the
positive (V) jack.
3. Touch the test leads to the capacitor to be tested.
4. Read the capacitance value in the display
Frequency/Duty Cycle Measurements (electronic)
1. V
2. Select ACV with the MODE button
3. Press the Hz%Hz
4. Insert the black test lead banana plug into the negative
COM jack and the red test lead banana plug into the
positive Hz jack.
5. Touch the test probe tips to the circuit under test.
6. Read the frequency on the display.
7. Press the Hz%%
display. Read the %of duty cycle on the display.
Temperature Measurements
WARNING: To avoid electric shock, disconnect both test
probes from any source of voltage before making a
temperature measurement.
1. Set the rotary function dial to TEMP.
2. Insert the K-Type adapter into the negative COM
and the Vjacks, making sure to observe the correct
polarity.
3. Select C or F with the MODE button.
4. Touch the Temperature Probe head to the part whose
temperature you wish to measure. Keep the probe
touching the part under test until the reading stabilizes
(about 30 seconds).
5. Read the temperature in the display. The digital reading
will indicate the proper decimal point and value.
WARNING: To avoid electric shock, be sure the
thermocouple has been removed before changing to
another measurement function

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Non-Contact AC Voltage Measurements
1. Turn meter on and touch the clamp tip to the suspected
hot conductor or insert into the hot side of the electrical
outlet.
2. If AC voltage is present, the detector light will illuminate.
NOTE: The conductors in electrical cord sets are often
twisted. For best results, rub the probe tip along a
length of the cord to assure placing the tip in close
proximity to the live conductor.
NOTE: The detector is designed with high sensitivity. Static
electricity or other sources of energy may randomly
trip the sensor. This is normal operation
MODE BUTTON
To select between DC/ACV,Ω,Diode,Continuity,CAP,C,F
MIN & MAX Recording Button
Press MIN/MAX to enter MIN, MAX Recording mode
(manual range only ). Select the proper range before
selecting MIN MAX to ensure that the MIN/MAX reading will
not exceed the testing range. Press once to select MIN.
Press again to select MAX. and press again release
MIN/MAX recording function.
REL BUTTON
For Offset adjustment.
WARNING: Risk of Electrocution. Before use, always
test the Voltage Detector on a known live circuit to verify
proper operation

11
Data Hold Button
To freeze the LCD meter reading, press the data hold
button. The data hold button is located in the center of the
rotary function dial. While data hold is active, the HOLD
display icon appears on the LCD. Press the data hold button
again to return to normal operation.
Note: The HOLD feature may activate when the Backlight
is turned on. Press the HOLD key again to exit Hold.
RANGE BUTTON
When the meter is first turned on, it automatically goes into
Autoranging. This automatically selects the best range for
the measurements being made and is generally the best
mode for most measurements. For measurement situations
requiring that a range be manually selected, perform the
following:
1. Press the RANGE 

indicator will turn on
2. Press the RANGE button to step through the available
ranges until you select the range you want.
3. Press and hold the RANGE button for 2 seconds to exit
the Manual Ranging mode and return to Autoranging.
Backlight Button
The backlight function illuminates the display and is used
when the ambient light to too low to permit viewing of the
displayed readings. Press the button for two seconds to
turn the backlight on and press the button a second time to
turn the backlight off.

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Battery Replacement
1. Remove the one rear Phillips head screw
2. Open the battery compartment
3. Replace the Requires One 9V battery
4. Reassemble the meter.
Warranty
This PDI product is warrantied to be free from defects in
materials and workmanship for a period of two (2) years
from the verified date of purchase. During this warranty
period, PDI will either repair or replace the defective unit, at

form of proof of original purchase date will be required
before any warranty processes begin. PDI warrants all
authorized repairs with a six (6) month limited warranty.
View full warranty details and register your PDI product at
www.PDImeters.com.
NOTE: Online product registration is required for all
warranty claims. All warranty claims must have a
Return Goods Authorization assigned from PDI, in order
to begin processing. Contact PDI for more details.

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