CEM 722-449 User manual

OPERATING INSTRUCTION

1000A True RMS DC/AC CLAMP METER

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 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.

CAUTIONS

Improper use of this meter can cause damage, shock, injury

or death. Read and understand this user 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 uncertainty of connection 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

600V DC/AC

Resistance, Diode, Continuity,

Capacitance, Frequency, Duty

Cycle, Test

250V DC/AC

Temperature (℃/℉)

60V DC/24V AC

AC mV

DC ¡ã

¡ã

Hz% 9

A400A

40A

Meter Description

1. Current clamp

2. Clamp trigger

3. Data Hold and Backlight button

4. Mode select button

5. Hz/% button

6. LCD display

7. COM input jack

8. Rotary Function swith

9. ZERO button

10. Range select button

11. V Ω ℃/℉jack

12. Battery compartment on rear

1. AC DC AC (alternating current)

and DC (direct currrent)

2. Minus sign

3. 8.8.8.8 4000 count (0 to 3999)

measurement reading

4. AUTO AutoRange mode

5. Diode test mode

6. •))) Audible Continuity

7. HOLD Data Hold mode

9.℃,℉,,m,V,A,K,M,Ω,Units of measure list

Specifications

Function

Range &

Resolution

Accuracy (% of

reading)

DC Current

40.00 AAC

± (2.8% + 10 digits)

400.0 AAC

± (2.8 % + 5 digits)

1000 AAC

± (3.0 % + 5 digits)

AC Current

(True RMS)

40.00 AAC

± (3.0% + 10 digits)

400.0 AAC

± (3.0 % + 5 digits)

1000 AAC

± (3.0 % + 5 digits)

DC Voltage

400.0 mVDC

± (0.8% + 3 digits)

4.000 VDC

± (1.5% + 3 digits)

40.00 VDC

400.0 VDC

600 VDC

± (2.0% + 3 digits)

AC Voltage

(True RMS)

400.0 mVAC

± (0.8% + 20 digits)

4.000 VAC

± (1.8% + 5 digits)

40.00 VAC

400.0 VAC

600 VAC

± (2.5% + 5 digits)

Resistance

400.0 Ω

± (1.0% + 4 digits)

4.000KΩ

± (1.5% + 2 digits)

40.00KΩ

400.0KΩ

4.000MΩ

± (2.5% + 3 digits)

40.00MΩ

± (3.5% + 5 digits)

Capacitance

40.00nF

(5.0% reading + 100

digits)

400.0nF

(3.0% reading + 5

digits)

4.000μF

(3.5% reading + 5

digits)

40.00μF

100.0μF

(5.0% reading + 5

digits)

Frequency

5.000Hz

(1.5% reading + 5

digits)

50.00Hz

(1.2% reading + 2

digits)

Sensitivity: 10Vrms

min.

500.0Hz

5.000kHz

50.00kHz

100.0kHz

Duty Cycle

0.5 to 99.0%

(1.2% reading + 2

digits)

Pulse width: 100µs - 100ms, Frequency:

5.000Hz ~ 100.0kHz

Temp (type-

(probe

accuracy not

included)

-20 to 1000 C

(3.0% reading + 5 C)

-4 to 1832 F

(3.0% reading + 7 F)

Note: No Autoranging & 400mV AC Voltage Range

Clamp size Opening 1.2" (30mm) approx

Diode Test Test current of 0.3mA typical;

Open circuit voltage 1.5V DC typical.

Continuity Check Threshold <100 ; Test current

< 1mA

Low Battery Indication “ ” is displayed

Overrange Indication “OL” is displayed

Measurements Rate 2 per second, nominal

Input Impedance 7.8M (VDC and VAC)

Display 4000 counts LCD

AC response True rms (AAC and VAC)

True RMS: The term stands for “Root-Mean-Square,”

which represents the method of calculation of the

voltage or current value. Average responding

multimeters are calibrated to read correctly only on

sine waves and they will read inaccurately on non-

sine wave or distorted signals. True rms meters read

accurately on either type of signal.

ACV/ACA bandwidth 50/60Hz (VAC)

Operating Temperature 14 to 122oF (-10 to 50oC)

Storage Temperature -14 to 140oF (-30 to 60oC)

Relative Humidity 90%(0oC to 30oC); 75%(30oC

to 40oC); 45%(40oC to 50oC)

Altitude Operating: 3000m; Storage

10,000m

Over voltage Category III 600V

Battery One “9V” Battery

Auto OFF approx. 35 minutes

Dimensions/Weight 229x80x49mm/303g

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

overvoltages less than

Overvoltage Cat. III

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 function select switch to the

OFF position when the meter is not in use.

DC/AC Current Measurements

WARNING: Ensure that the test leads

are

disconnected from the meter before

making current

clamp measurements.

1. Set the Function switch to the 1000A

or400A or

40A range. If the range of the

measured is not known,

select the higher range first then move to the lower

range if necessary.

2. Select AC or DC with the MODE button.

3. Press the trigger to open jaw. Fully enclose one

conductor

to be measured.

4. The clamp meter LCD will display the reading.

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 switch to the V position.

3. Select AC or DC with the MODE button.

！！

DC DC

AC AC

Ω Ω

CAP CAP

A A

+ +

. .

No Yes

4. Connect the test leads in parallel to the circuit under test.

5. Read the voltage measurement on the LCD display.

Resistance and Continuity 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 switch to the •))) position.

3. Use the multifunction MODE button to select resistance.

4. 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.

5. For Resistance tests, read the resistance on the LCD

display.

6. For Continuity tests, if the resistance is < 100 , a tone

will sound.

Diode 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 switch to the •))) position.

3. Press the MODE button until “ “ 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

indicate “OL”. Shorted devices will indicate near 0mV

and an open device will indicate “OL” in both polarities.

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.

1.Set the rotary function switch 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 or % duty cycle measurements

1. Set the function switch to the V position.

2. Insert the black lead banana plug into the negative

COM jack and the red test lead banana plug into

the positive V jack.

3. Select Hz or % duty with the Hz/% button.

4. Touch the test probe tips to the circuit under test.

5. Read the frequency on the display.

Red Black Black Red

Probe Probe Probe Probe

Forward test Reverse test

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