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270

Digital Clamp-on
Meter

Instruction Manual

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Summary of Contents for 270

Page 1: ...270 Digital Clamp on Meter Instruction Manual ...

Page 2: ...mity 4 B SAFETY CONSIDERATIONS 5 C TECHNICAL DATA 1 Features and Benefits 6 2 Product Applications 7 3 Specifications 8 D MEASUREMENT TECHNIQUES 1 Controls and Functions 12 2 Step by Step Procedures 14 E OTHER FEATURES 24 F APPLICATION NOTES 29 G TROUBLE SHOOTING GUIDE 34 H MAINTENANCE 35 I ACCESSORIES 36 2 ...

Page 3: ...ign 270 is a hand held autoranging clamp on DMM Extra large numerals min max capaci tance DC microamps and duty cycle are just a few of the features of the 270 An affordable choice the 270 offers measurements in all basic electrical functions with addi tional advanced features like non contact voltage The 270 comes complete with the following accessories Carrying Pouch Test Lead Set Temperature Pr...

Page 4: ...ed in accordance with the instruc tions and specifications given in this manual CAUTION Even though this instrument complies with the immunity standards it s accuracy can be affected by strong radio emissions not covered in the above standards Sources such as hand held radio trans ceivers radio and TV transmitters vehicle radios and cellular phones generate electromagnetic radiation that could be ...

Page 5: ...s or shorts Double check all connections before testing Have someone check on you periodically if working alone Have a complete understanding of the circuit being measured Disconnect power to circuit then connect test leads to the 270 then to circuit being measured NEVER Attempt to measure unknown high voltages Attempt to measure DC microamps with the meter in parallel to the circuit Connect the t...

Page 6: ... rapidly changing input Graph signals NCV Non contact voltage detection Detect the presence of voltage without con tacting the circuit P H Captures min max peak MAX MIN Records Min Max readings for all functions and ranges REL Measurements made are displayed relative to a stored value Auto Off Automatically powers off after 30 minutes of inactivity 2 Perf the HVA DCm ACA ACV ACV DCm OHM OHM CAP AC...

Page 7: ...ontinuity of wiring CAP Motor start and run capacitors ACA Motor and compressor start up current Hz Frequency on controls and line voltage TEMP Air duct temperatures ALL Bar graph to indicate rapid fluctuations ELECTRICAL ACV Measure line voltage ACA Measure line current OHMS Continuity of circuit breakers DCV Voltage of direct drive DC motors ACA Start up current of motors relays contactors and t...

Page 8: ... Frequency Response All Other Ranges Range Res Accuracy 400mV 0 1mV 1 2 of reading 5 digits Impedance 4V 0 001V 1 2 of reading 3 digits 10MW 40V 0 01V Overload Protection 400V 0 1V 1 5 of reading 3 digits 600VDC or AC RMS 600V 1V 8 DC M Range 40uA 400uA DC mic the circu OHM Range 400W 4kW 40kW 400kW 4MW 40MW Frequ Range 4 000kHz 40 00kHz 400 0kHz 4 000MH 40 00MH 400 0MH UL 3111 Pending 45Hz to 100...

Page 9: ...reading 5 digits 4kW 0 001kW 1 of reading 2 digits Overload Protection 40kW 0 01kW 250VDC or AC RMS 400kW 0 1kW 4MW 0 001MW 3 of reading 5 digits 40MW 0 01MW 3 of reading 10 digits Frequency Hz Range Res Accuracy 4 000kHz 0 001kHz 1 of reading 2 digits 40 00kHz 0 01kHz 400 0kHz 0 1kHz Overload Protection 4 000MHz 0 001MHz 250VDC or AC RMS 40 00MHz 0 01MHz 400 0MHz 0 1MHz nding 400A 0A Warning Use ...

Page 10: ...to 120 0ºF 1 1 5ºF 4 0ºF to 31 9ºF 1 1 5ºF 120 1ºF to 399 9ºF 2 4ºF 40 0ºF to 3 9ºF 40ºF to 1000ºF 1ºF 2ºF 32 0ºF to 120ºF 1 2ºF 3ºF to 749ºF 2 1 5ºF 750ºF to 1000ºF 2 4ºF 40ºF to 4ºF Overload Protection 60VDC or 30VAC RMS Celsius version of the 270 is available 10 Ca Ran 4nF 40nF 400n 4mF 40m 400m 4mF 40m nF Ge Max inpu Fuse Disp Ope Stor Rela Pow Batt Size Wei Warning Use only correct type and o...

Page 11: ...t and ground Fuse Protection m mA range 0 5A 600V Display Type 4000 Count 41 seg bargraph Operating Temperature 32ºF to 104ºF 0ºC to 40ºC Storage Temperature 14ºF to 122ºF 10ºC to 50ºC Relative Humidity 80 non condensing Power Supply 9V MN1604 Battery Life 80 hrs typical Size H x L x W 32 5mm x 255mm x 65mm 1 3in x 10in x 2 5in Weight 363g 0 8lbs e e st Warning Use only correct type and overvoltag...

Page 12: ... time R H Activates manual ranging Press and hold for 2 seconds to return to auto ranging MAX MIN Activates record mode Press to cycle between maximum and min imum recorded reading Press and hold for 2 seconds to return to normal mode P H Activates peak hold mode Used to capture in rush current NCV Activates the non contact voltage detection feature Press and hold while holding the jaw close to el...

Page 13: ...ction Selects capacitance test function Hz Selects frequency test function mA Selects DC microamp function Used to measure AC amperage TEMP Selects the temperature function Input Jacks COM Black test lead connection for all tests except temperature non con tact voltage and AC Amps V W mA Red test lead connection for all tests except temperature non con tact voltage and AC Amps cti ay s rn o min an...

Page 14: ...t set up FUNC BLACK RED MIN MAXI TEST LEAD TEST LEAD READING READING COM V W 0 1mV 600V Measurement Procedure 1 Disconnect power to circuit to be measured 2 Plug black test lead into the COM input jack 3 Plug red test lead into the V W input jack 4 Set rotary switch to the V range 5 Connect test leads to circuit to be measured 6 Reconnect power to circuit to be measured 7 Read the voltage on the 2...

Page 15: ...0V Measurement Procedure 1 Disconnect power to circuit to be measured 2 Plug black test lead into the COM input jack 3 Plug red test lead into the V W input jack 4 Set rotary switch to the V range 5 Connect test leads to circuit to be measured 6 Reconnect power to circuit to be measured 7 Read the voltage on the 270 Optional Modes See Other Features Section D H Freezes the reading on the LCD MAX M...

Page 16: ...ss the REL button to store the reading This will deduct the stored value from subsequent measurements eliminating the test lead resistance from the reading Instrument set up FUNC BLACK RED MIN MAX TEST LEAD TEST LEAD READING READING W COM V W 0 1W 40 00MW Measurement Procedure 1 Disconnect power to circuit to be measured 2 Plug black test lead into the COM input jack 3 Plug red test lead into V W ...

Page 17: ...ST LEAD TEST LEAD READING READING NOT USED NOT USED 0 01A 400A Measurement Procedure 1 Disconnect power to circuit to be measured 2 Set rotary switch to function 3 Clamp the jaws around one conductor of the circuit to be measured For best results center the wire in the jaw 4 Reconnect power to circuit to be measured 5 Read the current on the 270 Optional Modes See Other Features Section D H Freeze...

Page 18: ...ring this test Instrument set up FUNC BLACK RED TEST LEAD TEST LEAD COM V W Measurement Procedure 1 Disconnect power to circuit to be measured 2 Plug black test lead into the COM input jack 3 Plug red test lead into V W input jack 4 Set the rotary switch to the position 5 Connect test leads to circuit to be measured 6 The 270 will beep and the LED will illuminate at resistances of 35W or lower Opt...

Page 19: ...Plug black test lead into the COM input jack 3 Plug red test lead into V W input jack 4 Set the rotary switch to the 5 Connect the black test lead to the banded end of the diode cathode and the red test lead to the non banded end of the diode anode 6 For a good diode the reading on the display should be between 0 5V and 0 8V The reading will be lower for a germanium diode 7 Reverse the leads on th...

Page 20: ...AD COM V W mA Measurement Procedure 1 Disconnect power to circuit to be measured 2 Plug black test lead into the COM input jack 3 Plug red test lead into V W input jack 4 Set the rotary switch to the 5 Remove the capacitor from the circuit and discharge it 6 Connect test leads to the capacitor to be measured Observe polarity on polarity sensitive capacitors 7 Read the capacitor value on the LCD Op...

Page 21: ...ed in during this test Instrument set up FUNC BLACK RED TEST LEAD TEST LEAD Hz COM V W mA Measurement Procedure 1 Disconnect power to the circuit to be measured 2 Plug black test lead into the COM input jack 3 Plug red test lead into V W input jack 4 Set the rotary switch to the Hz position 5 Reconnect power to the circuit to be measured 6 Read the frequency on the LCD Optional Modes See Other Fea...

Page 22: ...ED MINIMUM MAXIMUM TEST LEAD TEST LEAD READING READING COM V W mA 0 01mA 400 0mA Measurement Procedure 1 Disconnect power to circuit to be measured 2 Plug black test lead into the COM input jack 3 Plug red test lead into the V W W m mA input jack 4 Set the rotary switch to the m mA function 5 Connect the test leads in series to the circuit to be measured 6 Reconnect power to circuit to be measured...

Page 23: ... Procedure 1 Remove the test leads from the input jacks 2 Observing polarity insert the temperature probe into the Type K input jack 3 Set the rotary switch to the appropriate function for the temperature being measured 4 Touch the temperature probe to the item to be measured 5 Read the temperature on the LCD Note The 270 will beep when no probe is connected to the temperature input Optional Modes...

Page 24: ...Make sure the test leads and temperature probe are disconnected while using the NCV fea ture Instrument set up FUNC BLACK RED TEST LEAD TEST LEAD NCV N A N A Measurement Procedure Remove the test leads and temperature probe prior to using the NCV feature 1 Turn the meter on to any range 2 Press and hold the NCV button 3 Put the arrow marked on the jaw close to the wire under test 4 If voltage is p...

Page 25: ... con firming the 270 is in relative mode 3 Now when making a measurement the value stored will be deducted from the actual reading 4 To see what the stored value is depress the REL button again and the REL indicator will flash and the reading on the display will show the stored value Depress the REL button again to return to REL mode 5 To clear or exit relative mode press and hold the REL button f...

Page 26: ...ding record ed Press the MAX MIN button again and the display will show MIN and the minimum reading recorded 3 Press the MAX MIN button again and MAX MIN will blink and the 270 will display the measured value in real time Steps 2 and 3 can be repeated to read the maximum and minimum recorded values If REL was activated and is being used with MAX MIN REL and MAX MIN will blink and the dis play will...

Page 27: ...ally select the range for the function and set the meter up to perform a measurement as outlined earlier in this manual 2 Depress and hold the P H button until CAL is dis played Once CAL clears from the display you may make a measurement Press P H repeatedly to cycle through the maximum and minimum peak readings Press and hold the P H button for two seconds to return to normal operation For inrush...

Page 28: ...ress the D H button at any time to freeze the reading on the LCD display This function is useful when measuring in locations where the display is difficult to read LED Indicators The 270 is equipped with three LED indicators at the top near the jaw HI V This indicator flashes and the 270 beeps when the test leads are in contact with a voltage of 30V AC DC or more NCV This indicator illuminates whe...

Page 29: ...est lead to the hot side of the block and the black lead to the neutral side of the block Reconnect power to the block and read the voltage on the meter The reading should be approximately 110V to 130V Disconnect power from the block and move the red wire to ground Reconnect power to the block and read the voltage on the meter Typically less than 20V should exist from neutral to ground If 110V or ...

Page 30: ...ignal conditioning When measuring DC Voltage of a bat tery the most accurate reading can be attained by testing the battery under load To accomplish this follow steps 1 through 4 shown on page 14 and the following with the battery in holder and device turned on Connect the red test lead from the meter to the positive terminal of the battery Connect the black test lead to the negative terminal of t...

Page 31: ... input line of the motor and the black test lead to the other power input line of the motor In most applications if the reading is OFL the motor winding is open Connect the red test lead to the frame of the motor and the black test lead to the winding In most applications if a reading of 0 Ohms is displayed the winding is shorted to the motor frame ground ges like es even filtering at be r ps he l...

Page 32: ...gher than running current Set up the meter following the steps under Measurement Procedure on page 17 and then proceed with the following Clamp the meter around a single wire and reconnect power to the device Read the current displayed on the meter This is the running current of the motor Disconnect power to the motor and put the meter in PEAK HOLD mode Reconnect the power and read the current dis...

Page 33: ...ert the K type thermocouple probe into the input jack on the 270 Set the 270 to the desired TEMP function Touch the temperature probe sensor to the device under test T1 When the reading stabilizes press the REL but ton The display will read 0 and T1 will be stored as the reference value that the next mea surement will be made relative to Touch the temperature probe sensor to the device under test ...

Page 34: ...y indicator on the LCD AC Volts do not read Very weak battery that will not turn on the low battery indicator on the LCD Non Contact Voltage The non contact voltage feature does not work works best when used to test a single wire Make sure the arrow on the jaw is pointed at the wire The meter beeps when This is a reminder to remove the set on TEMP test leads and insert the temper ature probe If a ...

Page 35: ...270 b Loosen the screw from the back of the 270 battery fuse cover c Remove the battery fuse compartment cover d Remove old battery or fuse and replace with new battery or fuse Observe the correct polarity on the battery Only install the correct value fuse 0 5A 600V Failure to do so can result in instru ment damage e Reassemble the instrument in reverse order from above 2 Cleaning your 270 Use a m...

Page 36: ... Volt Alkaline Battery A009A Test Lead Set 1000V CATIII 10A A085 0 5A 600V Fuse A107 Soft Carrying Pouch A270 Optional Accessories Part Number Fused Test Lead Kit FTLK3 Deluxe Test Lead Set TLS2000RB Carbon Monoxide Adapter A771 Pressure Adapter A620 ...

Page 37: ...37 mber mber 0RB ...

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Page 40: ...0 01kW 400kW 0 1kW 4MW 0 001MW 40MW 0 01MW DCuA 40uA 0 01uA 400uA 0 1uA TEMP 40ºF to 1000ºF 0 1ºF 1ºF 270 SPECIFICATIONS PARTIAL LIST 0 5 Basic DCV Accuracy also see pages 8 11 Test Products International Inc 9615 SW Allen Blvd Ste 104 Beaverton OR USA 97005 503 520 9197 Fax 503 520 1225 info tpi thevalueleader com L270M 1 25 05 copyright 2005 Test Products International Inc ...

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