Greenlee CM-600 Manuel utilisateur

INSTRUCTION MANUAL

CM-600 • CM-650

CLAMP-ON METERS

Read and understand all of the instructions and safety

information in this manual before operating or servicing

this tool.

Description

The Greenlee CM-600 and CM-650 Clamp-on Meters are versatile clamp-on meters intended to

measure AC current, AC voltage, resistance and to verify continuity. These units also have data

hold capability. In addition, the CM-650 is a true RMS reading meter.

Safety

Safety is essential in the use and maintenance of Greenlee tools and equipment. This manual

and any markings on the tool provide information for avoiding hazards and unsafe practices

related to the use of this tool. Observe all of the safety information provided.

Purpose

This instruction manual is intended to familiarize all personnel with the safe operation and

maintenance procedures for the Greenlee CM-600 and CM-650 Clamp-on Meters.

Keep this manual available to all personnel.

Replacement manuals are available upon request at no charge.

KEEPTHIS MANUAL

CM-600 • CM-650

Important Safety Information

This symbol is used to call your attention to hazards or unsafe practices which could

result in an injury or property damage. The signal word, defined below, indicates the

severity of the hazard. The message after the signal word provides information for

preventing or avoiding the hazard.

SAFETY ALERT SYMBOL

Immediate hazards which, if not avoided, WILL result in severe injury or death.

Hazards which, if not avoided, COULD result in severe injury or death.

Hazards or unsafe practices which, if not avoided, MAY result in injury or property

damage.

Read and understand this material before operating or servicing

this equipment. Failure to understand how to safely operate this

tool can result in an accident causing serious injury or death.

Important Safety Information

Electric shock hazard:

Contact with live circuits can result in severe injury or death.

Electric shock hazard:

• Do not use the unit if it is wet or damaged.

• Use test leads or accessories that are appropriate for the application. See the

category and voltage rating of the test lead or accessory.

• Inspect the test leads or accessory before use. They must be clean and dry, and the

insulation must be in good condition.

Failure to observe these warnings can result in severe injury or death.

Electric shock hazard:

• Do not apply more than the rated voltage between any two input terminals, or

between any input terminal and earth ground.

• Do not contact the test lead tips or any uninsulated portion of the accessory.

Failure to observe these warnings can result in severe injury or death.

Electric shock and fire hazard:

• Do not expose this unit to rain or moisture.

• Use this unit for the manufacturer’s intended purpose only, as described in this

manual. Any other use can impair the protection provided by the unit.

Failure to observe these warnings can result in severe injury or death.

CM-600 • CM-650

Important Safety Information

• Do not operate with the case open.

• Before opening the case, remove the test leads (or jaw) from the circuit and shut

off the unit.

Failure to observe these warnings can result in severe injury or death.

Using this unit near equipment that generates electromagnetic interference can result

in unstable or inaccurate readings.

Set the selector and connect the test leads so that they correspond to the intended

measurement. Incorrect settings or connections can result in a blown fuse.

Unless measuring voltage, current or frequency, shut off and lock out power. Make sure

that all capacitors are discharged. Voltage must not be present.

• Do not attempt to repair this unit. It contains no user-serviceable parts.

• Do not expose unit to extremes in temperature or high humidity. See Specifications.

Failure to observe these precautions can result in injury and can damage the instrument.

Do not change the measurement function while the test leads are connected to a

component or circuit.

Failure to observe this precaution can result in injury and can damage the instrument.

Identification

1. Display

2. Selector

3. Lever

4. Jaw

5. Hold button

6. COM terminal

7. V-Ωterminal

8. Battery Cover

9. Battery Cover Screw

Display Icons

10. Hold function is enabled.

11. — Polarity Indicator

12. Low Battery

13. l Overload Indication

Symbols on the Unit

Read the instruction manual

Double Insulation

Battery

Front Back

CM-600 • CM-650

*The crest factor is the ratio of the peak value to the RMS value; it is represented by the

Greek letter ξ.

AC Measurement

AC measurements are usually displayed as RMS

(root mean squared)

values. Two methods of

AC measurement are

average-responding RMS calibrated

and

true RMS-reading

The average-responding RMS calibrated method takes the average value of the input signal,

multiplies it by 1.11, and displays the result. This method is accurate if the input signal is a

pure sine wave. The Greenlee CM-600 is an average-responding meter.

The true RMS-reading method uses internal circuitry to read the true RMS value. This method

is accurate, within the specified crest factor limitations, whether the input signal is a pure sine

wave, a square wave, sawtooth, half wave or signal with harmonics. The ability to read true

RMS provides much more measurement versatility. The Greenlee CM-650 is a true RMS meter.

The Waveforms and Crest Factors table shows some typical AC signals and their RMS values.

Waveforms and Crest Factors

mrofevaW

eulaVSMR 001001001001

eulaVegarevA 090017846

*rotcaFtserC (ξ)414.1137.12

Operation

Electric shock hazard:

Contact with live circuits can result in severe injury or death.

1. Set the selector according to the Settings Table.

Settings Table

*Tone indicates circuit resistance is less than 50 Ω.

2. See Typical Measurements for illustrations of typical uses.

3. Test the unit on a known functioning circuit or component.

•If the unit does not function as expected on a known functioning circuit, replace the

battery.

•If the unit still does not function as expected, send the unit to Greenlee for repair.

4. Take the reading from the circuit to be tested.

5. Press HOLD to hold the measured value on the display.

Auto Power Off

When the meter is powered on, a timer is activated that will turn the unit off after approxi-

mately 30 minutes. To continue making measurements after the unit automatically powers off,

switch the selector to OFF and then back to the desired function.

To measure set the selector connect the and connect the

this value … to this symbol … red lead to … black lead to …

AC Voltage VV-ΩCOM

AC Current 200 A N/A N/A

(200 A max.)

AC Current 600 A N/A N/A

(200 A to 600 A)

Continuity ΩV-ΩCOM

Resistance* ΩV-ΩCOM

CM-600 • CM-650

Typical Measurements

Clamp Around Line Splitter

Clamp Around Wire

Notes:

•Clamp the jaw around one conductor only.

•Close the jaw completely.

•Center the wire in the jaw for highest

accuracy.

Notes:

•The Greenlee 93-30 Line Splitter is divided.

One section renders amps; the other renders

amps multiplied by 10.

•Close the jaw completely.

•Center the line splitter in the jaw for highest

accuracy.

Accuracy

Accuracy is specified as follows: ±(a percentage of the reading + a fixed amount)

at 23 °C ±5 °C (73.4 °F ±9 °F), 0% - 75% relative humidity.

See the Specifications section for operating conditions.

* Maximum open circuit voltage: 1 V

Continuity

Threshold: Tone sounds if the measured resistance is less than approximately 50 Ω,

and turns off when greater than approximately 300 Ω.

For the CM-600, AC accuracy is specified for sine waves only.

For the CM-650, accuracy specification applies for waveforms with crest factors less than 2.

•For crest factors from 2 to 3, add 1.4% to accuracy.

•For crest factors from 3 to 4, add 3% to accuracy.

Value Range Accuracy Frequency Input

Range Impedance

AC Voltage 0 to 600 V ±(1.2% + 3 V) 40 to 500 Hz 2 MΩ

2 nF

AC Current 0 to 199.9 A ±(1.9% + 0.5 A) 50/60 Hz N/A

(200 A range)

AC Current 0 to 400 A ±(1.5% + 5 A) 50/60 Hz N/A

(600 A range) 400 to 600 A ±(2.5% + 5 A) 50/60 Hz

Resistance* 0 to 2000 Ω±(1.5% + 2 Ω) N/A N/A

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