Greenlee CM-1500 Bedienungsanleitung

CM-1500 • CM-1550

Digital Clamp-on Meters

INSTRUCTION MANUAL

Read and understand all of the instructions and safety

information in this manual before operating or servicing this tool.

English ............ 1–18

Français ......... 19–36

Italiano........... 37–54

Deutsch .......... 55–72

Español .......... 73–90

Português...... 91–108

Nederlands ... 109–126

Description

The Greenlee CM-1500 and CM-1550 Digital Clamp-on Meters are hand-held testing devices with

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

resistance. They also verify continuity. The CM-1550 is a true RMS reading meter.

Specialized functions and capabilities include:

•Auto ranging

•Backlit display

•Auto power off

•Data hold

•MIN MAX hold

•Peak hold

•42-segment bar graph

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 Greenlee CM-1500 and CM-1550 Digital Clamp-on Meters.

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.

® Registered: The color green for electrical test instruments is a registered trademark of Greenlee Textron Inc.

CM-1500 • CM-1550

Important Safety Information

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.

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.

Important Safety Information

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 application. 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.

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 hazard:

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

CM-1500 • CM-1550

Important Safety Information

•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.

• 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.”

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

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 unit.

•Unless measuring voltage, current, or frequency, 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.

Identification

1. Jaw

2. Lever

3. Backlight button

4. MIN MAX button

5. Common (COM) input terminal

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

7. PEAK button

8. ZERO button

9. Display

10. HOLD button

11. Selector

Display Icons

12. Low battery indicator

13. REL Status of DC current ZERO function

14. MIN MIN Hold function is enabled

15. –Polarity indicator for numeric display

16. MAX MAX Hold function is enabled

17. Hold function is enabled

18. DC measurement is selected

19. AC measurement is selected

20. kHz Kilohertz

21. MHz Megahertz

22. Volts Voltage

23. Amps Amperes

24. Ohms

25. Continuity

26. TRMS True RMS (CM-1550 only)

27. PMAX MAX PEAK Hold function is enabled.

28. PMIN MIN PEAK Hold function is enabled.

29. –Polarity indicator for bar graph

30. Bar graph element

31. Overload indicator for bar graph

32.

OL.

Overload indicator for numeric display

Symbols on the Unit

Warning—Read the

instruction manual

Double insulation

Battery

13–14

26–28

18–25

3029

CM-1500 • CM-1550

Using the Features

•

Press to backlight the display. Press again to turn off. The backlight automatically shuts off

after approximately 1 minute.

•HOLD Button

Press momentarily to hold the present value on the display. Press again to return to normal

mode.

•Auto Power Off

The unit automatically shuts off after approximately 30 minutes of inactivity.

To disable this feature, press PEAK, MIN MAX, or while turning the meter on.

•MIN MAX Button

Press momentarily to begin recording the minimum and maximum values of input. Press

momentarily to cycle through the display modes as shown in the table below. The meter uses

its highest voltage or current range for this feature.

Press and hold to exit this mode.

•PEAK Button

Press momentarily to begin recording the minimum and maximum peak values of AC inputs.

Press momentarily to cycle through the display modes as shown in the table below. The meter

uses its highest voltage or current range for this feature.

Icon Display

MAX Maximum recorded value

MIN Minimum recorded value

MAX (flashing) Present measured value

MIN

Icon Display

PMAX Maximum recorded peak value

PMIN Minimum recorded peak value

Press and hold to exit this mode. “CAL” appears briefly on the display as internal circuitry is

reset.

•ZERO Button

Press momentarily to compensate for the residual magnetism in the jaw. “REL” appears on

the display. Press momentarily again to display the uncompensated measurement. The stored

offset value is retained. “REL” will flash. Press and hold to clear the stored offset value and

return to uncompensated measurement.

Repeat the procedure after changing DC current ranges.

Waveform

RMS Value 100 100 100 100

Average Value 90 100 87 64

Crest Factor* 1.414 1 1.73 2

(ξ)

AC Measurement

AC measurements are usually displayed as RMS (root mean square) values. The RMS value is

equal to the value of a DC waveform, which would deliver the same power if it replaced the time-

varying waveform. Two AC measurement methods are

average-responding RMS calibrated

and

true RMS-reading.

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

full wave rectification, 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-1500 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, square wave, triangle wave, half wave, or signal with harmonics. The ability to read true

RMS provides much more measurement versatility. The Greenlee CM-1550 is a true RMS meter.

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

Waveforms and Crest Factors

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

letter ξ.

CM-1500 • CM-1550

1. Set the selector according to the Settings Table. For DC current, start with the 1000 A range.

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

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 (or batteries).

• 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.

5. If it is a DC current reading, remove the clamp from the circuit and press the ZERO button.

Clamp the jaw around the circuit again to measure the actual DC current.

If the resolution is not satisfactory on the 1000 A range, remove the meter from the

conductor and switch to the 400 A range. Repeat steps 4 and 5.

Settings Table

Electric shock hazard:

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

Operation

To measure set the selector connect the and connect the

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

Continuity* V-ΩCOM

Resistance V-ΩCOM

DC Voltage V-ΩCOM

AC Voltage V-ΩCOM

DC Current (1000 A max.) Remove lead Remove lead

DC Current (400 A max.) Remove lead Remove lead

AC Current (1000 A max.) Remove lead Remove lead

Frequency Hz Remove lead Remove lead

*Tone sounds if the measured resistance is less than approximately 30 Ω.

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.

Voltage Measurement

Note: For DC measurements, current

flowing through the jaw in the direction

indicated by the arrow produces a positive

reading. Position the jaw for a positive

reading for highest accuracy.

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