Extech DM110 Mini Pocket MultiMeter User Manual PDF
Contents
1. Specifications Electrical Specifications Function Range Accuracy DC Voltage 400 0mV 0 7 rdg 3d 4 000V 40 00V 1 0 rdg 3d 400 0V 500V 1 3 rdg 3d AC Voltage 4 000V 40 00V 1 0 rdg 10d 40 400Hz 400 0V 500V 2 3 rdg 5d DC Current 40 00mA 2 0 rdg 5d 50 60 Hz 400 0mA AC Current 40 00mA 400 0mA 2 5 rdg 10d Resistance 400 09 4 000kQ 2 0 rdg 5d 40 00kQ 400 0kQ 4 000MQ 5 0 rdg 5d 40 00MQ 10 0 rdg 5d Capacitance 4 000nF 5 0 rdg 0 3nF 40 00nF 5 0 rdg 30d 400 0nF 3 0 rdg 15d 4 000uF 40 00uF 10 0 rdg 15d 200 0uF Frequency 9 999Hz 99 99Hz 10MHz Duty Cycle 0 1 99 2 0 rdg 5d Max input voltage 500V AC DC Input Sensitivity Frequency Ranges Diode Test Continuity Check Display Over range indication Polarity Low Battery Indication Battery Operating Temperature Storage Temperature Weight Size Standard 10Vrms min lt 9 999KHz 40Vrms min gt 99 99KHz Test current 1mA max open circuit voltage of 1 5V typical Audible signal if the resistance is lt 60Q 4000 count 3 digit LCD LCD displays OL Minus sign for negative polarity BAT symbol indicates low battery condition CR2032 3V Lithium 32 F to 104 F 0 C to 40 C 14 F to 122 F 10 C to 50 C 1 70z 50g 4 25x2 2x 5 108x56x11 5mm IEC1010 CAT II 600V Pollution degree Il CE Approved Operation AC or DC V2. 2006Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form DM110 V2 1 04 06 Safety International Safety Symbols A This symbol adjacent to another symbol or AJN terminal indicates the user must refer to the manual for further information A This symbol adjacent to a terminal indicates that v under normal use hazardous voltages may be present O Double insulation Safety Precautions 1 Improper use of this meter can cause damage shock injury or death Read and understand this users manual before operating the meter 2 Make sure any covers or battery doors are properly closed and secured 3 Always disconnect the test leads from any voltage source before replacing the battery or fuses 4 Do not exceed the maximum rated input limits 5 Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC These voltages are considered a shock hazard 6 Always discharge capacitors and remove power from the device under test before performing Capacitance Diode Resistance or Continuity tests TA Remove the battery from the meter if the meter is to be stored for long periods Description Meter Description 1 3 3 4 Digit 4000 count 2 RELATIVE button 3 SELECT button 4 DATA HOLD button 5 Hz DUTY button 6 Function switch Te Rubber holster 8 Test leads
3. capacitor to be measured 5 Read the value on the display Diode Test WARNING To avoid electric shock do not test any diode that has voltage on it Set the function switch to Q PF position Press the SELECT button once to enter Diode Test The PK symbol will appear in the display 3 Touch the test probe tips to the diode or semiconductor junction you wish to test Note the meter reading 4 Reverse the test lead polarity by reversing the red and black leads Note this reading 5 The diode or junction can be evaluated as follows A If one reading shows a value and the other reading shows OL the diode is good B If both readings show OL the device is open C If both readings are very small or 0 the device is shorted ba AC DC Current Measurement 1 Set the function switch to the mA AC DC position 2 Press the SELECT button to measure AC or DC mA 3 Remove power from the circuit under test and open the circuit at the point where you wish to measure current 4 Touch the black test probe tip to the negative side of the circuit and touch the red test probe tip to the positive side of the circuit 5 Apply power to the circuit 6 Read the value on the display Frequency Duty Cycle Measurement 1 Set the function switch to the HZ DUTY position 2 Press the Hz DUTY button once to display Duty Cycle Pressing the button again will toggle the display to frequency Hz 3 Touch the
4. test probe tips to the circuit under test Be sure to observe the correct polarity red lead to positive black lead to negative 4 Read the value on the display Features Maintenance Relative Button The relative measurement feature allows you to make measurements relative to a stored reference value A reference voltage can be stored and measurements made in comparison to that value The displayed value is the difference between the reference value and the measured value 1 Perform the measurement as described in the operating instructions 2 Press the RELATIVE button to store the reading in the display and the REL indicator will appear on the display 3 The display will now indicate the difference between the stored value and the measured value 4 Press the RELATIVE button to exit the relative mode Note The Relative function does not operate in the Frequency function Data Hold Button The Data Hold function allows the meter to freeze a measurement for later reference 1 Press the DATA HOLD button to freeze the display the HOLD indicator will appear 2 Press the DATA HOLD button to return to normal operation Auto Power Off 1 To save power the display automatically turns off in 30 minutes 2 Press the SELECT button to turn display back on 3 To cancel Auto Power Off set the function switch to the off position Hold down the SELECT button and turn the function switc
5. User s Guide EXT INSTRUMENTS Pocket Multimeter 4000 Count Autoranging DMM Model DM110 AG Pocket MultiMeter DM110 O O O OQO SELECT REANVEDATAH LD Hz DUTY Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies on sensors and cables If it should become necessary to return the instrument 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 at www extech com for contact information A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied Copyright
6. h to the desired position and release the SELECT button after 3 seconds WARNING Disconnect the test leads from any source of voltage before removing the back cover or the battery fuse door Do not operate your meter until the rear housing is in place and fastened securely Replacing the Battery 1 Remove the rubber holster if in place 2 Remove Philips head screw and lift off the rear housing of the meter 3 Replace old battery with fresh CR2032 type button battery 4 Replace the rear cover and secure the screw a Support line 781 890 7440 Technical support Extension 200 E mail support extech com Repair amp Retums Extension 210 E mail repair extech com Product specifications subject to change without notice For the latest version of this User s Guide Software updates and other up to the minute product information visit our website wwww extech com Extech Instruments Corporation 285 Bear Hill Rd Waltham MA 02451
7. oltage Measurement 1 Set the function switch to the AC DCV position 2 Press the SELECT button to select AC or DC voltage measurement 3 Touch the test probe tips to the circuit under test Be sure to observe the correct polarity red lead to positive black lead to negative 4 Read the voltage on the display Resistance Continuity Measurement WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements Remove the batteries and unplug the line cords Never measure continuity on circuits or wires that have voltage on them Set the function switch to the Q Dt position Connect the test leads to the circuit to be measured Read the value on the display For Continuity tests press the SELECT button until the s symbol appears in the display If the resistance is less than 60 ohms an audible tone will sound OLN a Capacitance Measurement WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any capacitance measurements Remove the batteries and unplug the line cords Never measure continuity on circuits or wires that have voltage on them 1 Set the function switch to the Q S gt t F position 2 Press the SELECT button until nF appears in the display 3 Press the RELATIVE button to zero the display 4 Connect the test leads to the
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