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User Manual

CM400
400A TRMS AC Clamp Meter

Introduction

Congratulations on your purchase of the Triplett CM400 400A True RMS AC
Clamp meter. The CM400 True RMS AC Clamp meter features:



AC Current measurements up to 400A.



Variable Frequency Drive (VFD) Voltage Measurements



Inrush Current Mode



Temperature Measurements



Non-contact AC voltage detection



Auto Power OFF

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Summary of Contents for CM400

Page 1: ... purchase of the Triplett CM400 400A True RMS AC Clamp meter The CM400 True RMS AC Clamp meter features AC Current measurements up to 400A Variable Frequency Drive VFD Voltage Measurements Inrush Current Mode Temperature Measurements Non contact AC voltage detection Auto Power OFF ...

Page 2: ... for longer than 60 days 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 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 ...

Page 3: ... NCV Non Contact Voltage Indicator LED 4 Clamp Trigger 5 Rotary Function Switch 6 LCD Display 7 Data HOLD Flashlight Button 8 REL Backlight Button 9 Range Button 10 MODE and VFD Button 11 PEAK and INRUSH Button 12 Flashlight 13 Battery Cover 14 COM Input Jack 15 Positive Input Jack ...

Page 4: ...attery 6 Auto Range Mode 7 INRUSH Current Mode 8 Display Hold 9 MAX MIN Mode 10 Variable Frequency Drive VFD Voltage Value 11 Diode Test 12 Continuity Test 13 Auto Power Off APO 14 Faranheit and Celcius Units Temperature 15 Units of Measure Prefixes 16 Hertz Frequency 17 Percent Duty Cycle 18 Measurement Display Digits ...

Page 5: ...select the highest range then move to lower ranges if necessary 2 Press the REL button to zero the meter display 3 Use rotary function switch to select 40A AC or 400A AC range 4 Select AC current Test press the INRUSH PEAK Button to turn Inrush current test the LCD will display 5 Press the trigger to open jaw Fully enclose only one conductor For optimum results center the conductor in the jaw 6 Th...

Page 6: ... the test leads in parallel to the circuit under test 4 Read the voltage measurement on the LCD display Resistance Measurements 1 Insert the black test lead into the COM input jack and the red test lead into the Positive input jacks 2 Set the function switch to the ΩCAP position 3 Touch the test probe tips across the circuit or component under test 4 Read the resistance on the LCD display Continui...

Page 7: ...nction switch to the VAC Hz Position 2 Press MODE Button to select the Frequency Hz or Duty Cycle 3 Touch the test probe tips across the part under test 4 Read the value on the display 5 The display will indicate the proper decimal point and value Temperature Measurements 1 Set the function switch to the TEMP position 2 Insert the Temperature Probe into the negative COM and Positive jacks observin...

Page 8: ...ading displays OL the diode is good If both readings display OL the device is open If both readings are very small or 0 the device is shorted Non Contact Voltage NCV Measurements WARNING Risk of Electrocution always test the Voltage Detector on a known live circuit to verify proper operation before use 1 Touch the probe tip to the hot conductor or insert into the hot side of the electrical outlet ...

Page 9: ...mly lit areas Press the Hold Flashlight Button to turn the Flashlight on Press again to turn the Flashlight off Range Button Press the RANGE Button to activate the manual mode and to disable the Autorange function The symbol AUTO disappears from the upper left part of the display In manual mode press the RANGE Button to change measuring range the relevant decimal point will change its position The...

Page 10: ...ue Press the REL Backlight Button to zero the display will appear in the display To exit this mode press the REL Backlight Button again and will disappear in the display DC voltage measurement mode Press the REL Backlight Button to zero the display Press and hold the the REL Backlight Button to turn the Backlight on Press and hold again to turn the Backlight off Relative Backlight Button In order ...

Page 11: ...ent do not use abrasives or solvents If the meter is not to be used for 60 days or more remove the battery and store it separately Battery Replacement 1 Remove the Phillips head screw that secures the rear battery door 2 Open the battery compartment 3 Replace the 1 5V x 3 AAA batteries 4 Secure the battery compartment Type K Temperature Probe Replacement Note To use a Type K thermocouple probe tha...

Page 12: ...nsitivity 2A AC True RMS Voltage with VFD 4 000V 1mV 1 2 of rdg 5 digits 40 00V 10mV 400 0V 100mV 1000V 1V 1 5 of rdg 5 digits Variable frequency drive test AC voltage rang 100V 600V AC voltage bandwidth 50 to 1000Hz Sine 50 60 All wave Accuracy specified from 5 to 100 of the measuring range Maximum Input 1000V ac rms PEAK Maximum Input 1000V DC Voltage 4 000V 1mV 1 0 of rdg 3 digits 40 00V 10mV 4...

Page 13: ...ts Input Protection 1000V AC rms Sensitivity 15V AC rms Frequency AC Current 45Hz to 1kHz 1 0 of rdg 5 digits Sensitivity 20A Duty Cycle 20 0 80 0 0 1 1 2 of rdg 10 digits Temperature 20 to 1000 C 0 1 1 C 3 of rdg 3 C 4 to 1832 F 0 1 1 F 3 of rdg 5 F Sensor Type K Thermocouple Input Protection 300V dc or 300V ac rms Function Testing Condition Reading Diode Forward DCA is approx 1mA open circuit Vo...

Page 14: ...OL display 3 readings per second nominal Type K thermocouple 10MΩ VDC and VAC True rms AAC and VAC 2KHz 5 to 40 C 41 to 104 F 20 to 60 C 4 to 140 F Max 80 up to 31 C 87 F decreasing linearly to 50 at 40 C 104 F 80 7000ft 2000meters maximum 3 x 1 5V AAA Batteries 30h Backlight ON 100h Backlight OFF After approx 15 minutes For indoor use and in accordance with the requirements for double insulation ...

Page 15: ... date of purchase This warranty does not apply to any of our products which have been repaired or altered by unauthorized persons in any way or purchased from unauthorized distributors so as in our sole judgment to injure their stability or reliability or which have been subject to misuse abuse misapplication negligence accident or which have had the serial numbers altered defaced or removed Acces...

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