Greenlee CMT-80 Bedienungsanleitung

CMT-80

Clamp-on Meter

INSTRUCTION MANUAL

Read and understand all of the instructions and

safety information in this manual before

operating or servicing this tool.

English .......... 1–14

Français ....... 15–28

Italiano......... 29–42

Deutsch ........ 43–56

Español ........ 57–70

Português...... 71–84

Nederlands .... 85–97

Description

The Greenlee CMT-80 Digital Clamp-on Meter is a hand-held testing device

with the following measurement capabilities: AC and DC voltage, AC current,

and resistance. It also verifies continuity.

This unit has data hold capability. It automatically determines measurement

function based on input.

Safety

Safety is essential in the use and maintenance of Greenlee tools and

equipment. This instruction 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 of This Manual

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

operation and maintenance procedures for the Greenlee CMT-80 Digital

Clamp-on Meter.

Keep this manual available to all personnel.

Replacement manuals are available upon request at no charge.

KEEP THIS MANUAL

All specifications are nominal and may change as design improvements occur.

Greenlee Textron Inc. shall not be liable for damages resulting from misapplication or

misuse of its products.

CMT-80

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 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.

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

•Use test leads or accessories that are appropriate for the applica-

tion. Refer to 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.

•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.

CMT-80

Important Safety Information

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

parts.

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

Refer to “Specifications.”

•Do not connect to voltage for longer than 30 seconds.

Failure to observe these precautions can result in injury and can

damage the unit.

•Do not operate with the case or battery cover open.

•Before removing the case or battery cover, 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.

•Unless measuring voltage or current, shut off and lock out power.

Make sure that all capacitors are discharged. Voltage must not be

present.

•Using this unit near equipment that generates electromagnetic

interference can result in unstable or inaccurate readings.

Do not use the meter to measure voltages in circuits that could be

damaged by the meter’s low input impedance (approximately 4 kΩ).

Identification

1. Jaw

2. Lever

3. Display

4. Common (COM) input terminal

5. Volts or resistance (V-Ω) input terminal

6. ON/OFF/HOLD button

Display Icons

7. Low battery indicator

8. DC measurement is selected

9. –Polarity indicator

10. AC measurement is selected

11. Automatic selection is active

12.

Overload indicator

13. Continuity

14. Hold function is enabled

15. VVoltage

16. AAmperes

17. Ohms

18. Lo Zi Low input impedance is active

4 5

–

Symbols on the Unit

Warning—Read the instruction manual

Double insulation

Battery

CMT-80

Operation

2. Refer to “Typical Measurements” for specific measurement instructions.

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

intend to measure.

•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. Refer to the instructions under the Warranty.

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

Note: Momentarily press the ON/OFF/HOLD button to hold the present

measurement on the display; momentarily press again to return to the normal

display mode. Press and hold to turn the unit off.

Priority Display Conditions

AC volts or Input at terminals is

1DC volts, 1.3 to 600 VAC

whichever 1.8 to 600 VDC

is greater –0.6 to –600 VDC

Input at terminals is

Resistance 0 to ∞Ω

2and 0 to 0.9 VAC

continuity 0.2 to 1.4 VDC

–0.02 to –0.2 VDC

3AC amps AC current through jaw is

0.6 to 400 A

Electric shock hazard:

Contact with live circuits can result in severe

injury or death.

1. The meter automatically selects the proper measurement according to

the following table.

Typical Measurements

Current Measurement—

Clamp Around Wire

Notes:

•Clamp the jaw around one conductor only.

•Close the jaw completely to ensure

accurate measurement.

•Center the wire in the jaw for highest

accuracy.

Current Measurement—

Clamp Around Line Splitter

Notes:

•The Greenlee 93-30 Line Splitter is divided.

One section renders amps; the other

renders amps multiplied by 10.

•Close the jaw completely to ensure

accurate measurement.

•Center the line splitter in the jaw for highest

accuracy.

CMT-80

Typical Measurements

Voltage Measurement

Resistance

Measurement

Continuity Check

Accuracy

Refer to “Specifications” for operating conditions and temperature coefficient.

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

amount) at 23 °C ±5 °C (73.4 °F ±9 °F), 0% to 80% relative humidity.

Accuracy Table

Characteristic Range Accuracy Frequency

Range

AC Current 0.6 to 50.0 A ±(1.8% + 0.6 A) 50 to 60 Hz

50.0 to 400.0 A ±(1.8% + 0.3 A)

AC Voltage* 1.3 to 600.0 V ±(1.5% + 0.3 V) 50 to 500 Hz

DC Voltage* 1.8 to 600.0 V ±(1.0% + 0.2 V) N/A

–0.6 to –600.0 V ±(1.0% + 0.4 V)

Resistance** 0.1 to 99.9 Ω±(2% + 1.0 Ω)N/A

100 to 2000 Ω±(2% + 2 Ω)†

*Input impedance: 4 kΩnominal at voltages up to 30 V;

increases with voltage to approximately 600 kΩat 600 V

**Open circuit voltage: 1.5 V maximum

†Multiply temperature coefficient times 1.5 when operating temperature

is above 40 °C.

Continuity

Tone on: Circuit resistance is ≤25 Ω(approximately).

Tone off: Circuit resistance is ≥400 Ω(approximately).

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