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EX612  V2.2  06/08 

10 

Data Hold 

To freeze the LCD reading, press the 

HOLD

 button. While data hold is active, the 

HOLD

 

icon appears on the LCD. Press the

 HOLD

 button again to return to normal operation. 

MAX/MIN  

1. Press 

the 

MAX/MIN

 button to activate the MAX/MIN recording mode. The display icon 

"

MAX

" will appear. The meter will begins recording and displaying the maximum 

value measured. 

2. Press 

the 

MAX/MIN

 button and “

MIN

” will appear. The meter will display the minimum 

value measured during the recording session. 

3. Press 

the 

MAX/MIN

 button and “

MAX

 

MIN

” will appear. The meter will display the 

present reading, but will continue to update and store the max and min readings. 

4. 

To exit MAX/MIN mode press and hold the 

MAX/MIN

 button for 2 seconds. 

 

Peak Hold 

When ACA or ACV is selected, pressing the 

PEAK

 button enables the peak capture circuit. 

The meter will now capture and display the maximum and minimum peaks of the 
waveform. 

RANGE 

In the Voltage, Resistance, Capacitance, Frequency or uA function the meter automatically 
selects the best range for the measurements being made. For measurement situations 
requiring that a range be manually selected, perform the following: 

1. Press 

the

 RANGE

 button. The “

AUTO”

 display icon will turn off. 

2. Press 

the 

RANGE

 key to step through the available ranges. Observe the decimal 

point and units displayed until the preferred range is located. 

3. 

To exit the Manual Ranging mode and return to Autoranging, press and hold the

 

RANGE

 key for 2 seconds. 

LCD Backlight 

The LCD is equipped with backlighting for easier viewing, especially in dimly lit areas. 

Press and hold the 

HOLD/

 button for 2 seconds to turn the backlight on. The backlight 

will automatically turn off after 30 seconds.  

Automatic Power OFF with Disable 

In order to conserve battery life, the meter will automatically turn off after approximately 30 
minutes. To turn the meter on again, turn the function switch to the OFF position and then 
to the desired function position. 

To disable APO: 

1. 

From the OFF position, hold the MODE button and rotate the FUNCTION switch to a 

measurement function. 

2. 

 will appear in the display 

3. 

Release the MODE button 

4. 

APO is now disabled (APO icon is off) and will be reset when the Function switch is 

returned to the OFF position. 

Low battery indication 

When the 

 icon appears in the display, the battery should be replaced. Refer to the 

battery replacement procedure in the maintenance section. 

 

Summary of Contents for Extech EX612

Page 1: ...Ly wUser s Guide 400Amp True RMS AC Clamp Meter Model EX612 Patented...

Page 2: ...s injury This CAUTION symbol indicates a potentially hazardous situation which if not avoided may result damage to the product PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY I Equi...

Page 3: ...ore replacing the battery or fuses Inspect the condition of the test leads and the meter itself for any damage before operating the meter Repair or replace any damage before use Use great care when ma...

Page 4: ...CV LED indicator 16 Input shutter Display icons Description HOLD Data Hold APO Auto Power Off AUTO Autoranging P Peak Hold DC Direct Current AC Alternating Current MAX Max reading MIN Min reading Low...

Page 5: ...ouple temperature measurements Non Contact Voltage Detector WARNING Risk of Electrocution Before use always test the Voltage Detector on a known live circuit to verify proper operation 1 Rotate the Fu...

Page 6: ...ments CAUTION Do not measure voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Slide the input shutter to the up position 2 Rota...

Page 7: ...resistance measurements 2 Press the MODE button to select continuity 3 Touch the test probe tips across the circuit or component under test 4 If the resistance is 50 a tone will sound Diode Test 1 Con...

Page 8: ...ote The Zero feature removes stray test lead capacitance to improve the accuracy of low value capacitance measurements To perform a zero Press and hold the MODE ZERO button for two beeps The display w...

Page 9: ...the break Touch the red test probe tip to the positive side of the break 7 Turn circuit power on 8 Read the current value in the display Type K Temperature Measurements 1 Slide the input shutter to th...

Page 10: ...ing that a range be manually selected perform the following 1 Press the RANGE button The AUTO display icon will turn off 2 Press the RANGE key to step through the available ranges Observe the decimal...

Page 11: ...for service during or beyond the warranty period contact the Customer Service Department at 781 890 7440 ext 210 for authorization or visit our website www extech com for contact information A Return...

Page 12: ...ge 50 60 Hz True RMS 600 VAC 1V 2 0 5 digits 400 00 mVDC 0 01mV 4 0000 VDC 0 0001V 40 000 VDC 0 001V 400 00 VDC 0 01V 0 1 2 digits DC Voltage 600 0 VDC 0 1V 1 0 2 digits 400 00 0 01 0 8 20 digits 4 00...

Page 13: ...ied Frequency test leads Sensitivity 5 to 5kHz 0 8Vrms min 5kHz to 150kHz 5Vrms min 0 5 to 99 0 0 1 1 2 2 digits Duty Cycle Pulse width 100 s to 100ms Frequency 5Hz to 150kHz 58 to 4 F 50 to 19 C 13 F...

Page 14: ...width 50 to 400Hz AAC and VAC AC response True rms AAC and VAC Crest Factor 3 0 in 40A and 400A ranges 1 4 in 1000A range 50 60Hz and 5 to 100 of range Operating Temperature 41 F to 104 F 5 C to 40 C...

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