MARTINDALE CM57 Instruction Manual Download Page 3

3.4 Description of Press Buttons

 

Selects backlight

Hz

Selects frequency measurement

HOLD

Selects display hold

3.5 Description of LCD Symbols

 

Auto power off is activated

H

Display hold is activated

Diode test function is selected

Continuity function is selected

SMART

SMART function is active

Indicates AC measurement

Indicates DC measurement

A, V, 

:

, k

:

, M

:

Hz, nF, μF

 

Units of measurement being displayed

Indicates >30V present between terminals

 

Indicates low battery

3.6 Auto Power Off

If the clamp meter is inactive for a period of 10 minutes it will 
automatically power off.

If any button is pressed after the clamp meter has automatically 
powered off, the clamp meter will turn back on.

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To disable the auto power off function hold the   or 

Hz

 button at 

the same time as turning the rotary switch from 

OFF

 to any position. 

The 

  symbol will no longer be displayed on the LCD.

3.7 Backlight

Press the    button to turn on the backlight. Press again to turn the 
backlight off.

The backlight will automatically turn off after 30 seconds to con-
serve the battery.
 

3.8 Display Hold

To hold a displayed value, press the 

HOLD

 button. The LCD will 

display 

HOLD

.

Press again to exit display hold.

3.9 Use of the TL16 Test Leads

Before use, always check the continuity of the test leads.

Where access to test points may require extended probe tips, the 
probe tip caps may be removed by gently pulling them forward until 
they unclip from the probe body.

CAT III 1000V 

CAT IV 600V

CAT II 1000V 

ONLY

DO NOT USE ON
CAT III or CAT IV

 

installations  

3.10 AC Current Measurements

Set the rotary switch to the 

A

 position.

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Taking all necessary safety precautions, press the clamp meter trig-
ger to open the clamp jaws, position the jaws around the conductor 
to be measured, and release the trigger to close the jaws.

Position the clamp meter so the conductor is central within the 
clamp jaws.

Read the measured ac current from the display.

Note. Clamping around more than one conductor will result in an 
incorrect measurement.

3.11 Voltage Measurements

Connect the black test lead to the 

COM

 terminal and the red test lead 

to the 

 terminal. 

Set the rotary switch to the 

V

 position. The LCD will display 

SMART

.

The smart function will automatically detect if an AC or DC voltage 
is present at the terminals.

Taking all necessary safety precautions connect the test leads 
to the circuit being measured and read the measured AC or DC 
voltage from the display.

3.12 Frequency Measurements

When measuring AC current or AC voltage, the frequency of the 
current or voltage can be measured by pressing the 

Hz

 button. The 

LCD will display 

kHz

.

To revert back to current or voltage measurement, press the 

Hz

 

button again.

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3.13 Resistance Measurements and Continuity Testing

Connect the black test lead to the 

COM

 terminal and the red test lead 

to the 

 terminal.

Set the rotary switch to the 

 

 

:

 position. The LCD will 

display 

SMART

.

Taking all necessary safety precautions connect the test leads to 
the circuit being measured or tested.

The smart function will automatically detect if resistance is present 
at the terminals.

Read the measured resistance from the display.
If the resistance is 

d

 30

:

, the buzzer will sound continuously.

3.14 Capacitance Measurements

 

Be sure the capacitor being tested is completely discharged 
before connecting the test leads.

Connect the black test lead to the 

COM

 terminal and the red test lead 

to the 

 terminal.

Set the rotary switch to the 

 

 

:

 position. The LCD will 

display 

SMART

.

Taking all necessary safety precautions connect the test leads to 
the circuit being measured.

The smart function will automatically detect if capacitance is 
present at the terminals.

Read the measured capacitance from the display.

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Summary of Contents for CM57

Page 1: ...e Updated instructions and product information are available at www martindale electric co uk 1 1 Meaning of Symbols and Markings Caution risk of danger refer to instructions Caution risk of electric shock Equipment protected by double or reinforced insulation Class II Application around and removal from hazardous live conductors is permitted CAT II Measurement Category II is applicable to test an...

Page 2: ...s Cautions Avoid severe mechanical shock or vibration and extreme temperature When using test leads avoid excessive stresses to the cable entry points at the probe and 4mm plug connector To avoid possible corrosion from leaking batteries remove the batteries when the unit is not in use for an extended period 2 INTRODUCTION 2 1 Inspection Examine the shipping carton for any sign of damage Inspect t...

Page 3: ...nd release the trigger to close the jaws Position the clamp meter so the conductor is central within the clamp jaws Read the measured ac current from the display Note Clamping around more than one conductor will result in an incorrect measurement 3 11 Voltage Measurements Connect the black test lead to the COM terminal and the red test lead to the terminal Set the rotary switch to the V position T...

Page 4: ...can be accessed by removing the screw and lifting off the cover 12 Figure 2 13 Fit 2 new 1 5V AAA alkaline batteries IEC LR03 NEDA 24A observing correct polarity Replace the battery compartment cover and screw Note Do not mix old and new batteries 4 2 Test Lead Replacement If the test leads become damaged they should be replaced The replacement test leads must have the same or better overvoltage c...

Page 5: ... an implied warranty or exclusion or limitation of incidental or consequential damages the limitations and exclusions of this warranty may not apply to every buyer If any part of any provision of this warranty is held invalid or unenforceable by a court or other decision maker of competent jurisdiction such holding will not affect the validity or enforceability of any other provision or other part...

Page 6: ... up to 2000m Pollution degree 2 SAFETY Conforms to BS EN 61010 1 BS EN 61010 2 032 CAT III 600V Class II double insulation Specification CM57 AC Smart Clamp Multimeter EMC Conforms to BS EN 61326 1 SPECIFICATION FOR TL16 TEST LEADS Maximum voltage 1000V AC DC Maximum current 10A continuous Connector 4mm banana plug with fixed shroud Environmental Temperature Operating Storage 0 C to 40 C Altitude ...

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