Triplett 310
Contents
1. connections or other live parts of an electrical circuit If in doubt check the circuit first for voltage before touching it Turn off the power to a circuit before connecting test probes to it Be sure there is no voltage present be fore you touch the circuit Do not use cracked or bro ken test leads HIGH VOLTAGE IS DANGEROUS Always start with the power off Be sure there is no voltage present before making connections to the cir cuit Don t touch the tester its test leads or any part of the circuit while it is on Before disconnecting the tester turn the circuit off and wait for the meter to return to zero DISTRIBUTION CIRCUITS PACK A PUNCH In high energy circuits such as distribution transform ers and bus bars dangerous arcs of explosive nature can occur if the circuit is shorted If the tester is con nected across a high energy circuit when set to a low resistance range a current range or any other low impedance range the circuit is virtually shorted Special equipment designed for use with these circuits is available Contact a qualified person for assistance before attempting to make measurements on any high energy circuit SAFETY IS NO ACCIDENT 8 INTRODUCTION The Triplett Model 310 TEL is a handy hand sized VOM With all the versatility and performance of larger more expensive bench size models It offers diode over load protection against damage to the meter move ment caused by acciden2. DIAL SCALE INDICATOR NEEDLE POLARITY REVERSING SWITCH ZERO ADJUSTMENT SCREW BLACK RED TEST LEAD TEST LEAD INPUT INPUT JACK JACK RANGE SELECTOR SWITCH OHMS ADJUST CONTROL VARIOUS RANGE SETTINGS 15 DC VOLTAGE MEASUREMENTS 0 3 through 0 300 Volts 1 DURA Co N Insert the test leads into the appropriate jacks Red to VeOeM Black to COM Set Range Switch to appropriate DCV range Set the Polarity Switch to desired polarity Connect probes across circuit to be measured Energize circuit Read voltage on the black AC DC scale DO NOT TOUCH THE VOM while it is connected to high voltage 16 DC VOLTAGE MEASUREMENTS POLARITY REVERSING SWITCH AC VOLTAGE MEASUREMENTS 0 3 through 0 300 Volts 1 Insert the test leads into the appropriate jacks Red to VeOeM Black to COM Set Range Switch to appropriate ACV range Connect probes across circuit to be measured Energize circuit Read voltages above 3 Volts on the Black AC DC Scale Read voltages below 3 Volts on the Red 3AC Scale with the VOM set to 3ACV DA o DO NOT TOUCH THE VOM while it is connected to high voltage 18 AC VOLTAGE MEASUREMENTS POLARITY REVERSING SWITCH OHMS ADJUST CONTROL Set Range to 300 ACV TV SAFETY FIRST 19 RESISTANCE MEASUREMENTS X1 through X1K Ohms 1 A Co N
3. Do not use the meter if it may have been damaged in transport Do not attempt immediate use of the meter when bringing if from a cold environment to a warm environment Condensation of water inside and outside of the meter may produce dangerous measuring conditions Allow the meter to warm to room temperature before using Do not use meter in condensing atmospheres That is do not use meter in conditions where ambient temperature and humidity could cause condensation of water inside of meter Doing so may cause injury to the user Use caution when attempting to evaluate if a dangerous voltage is present The meter will not read AC voltage if it is set to DC For example if the meter is set to 300VDC it will not measure a dangerous AC voltage even if the probes are inserted into a household AC wall outlet Do not touch the metallic portion of one test lead if the other test lead is connected to a live circuit The current from the live circuit may pass through the meter and appear on the unconnected test lead Failure to observe this warning may result in user injury Remove the battery when the meter may be left unused for longer than 1 month Chemical leakage from the battery could damage the meter leading to user injury Do not use the meter if there is evidence of chemical leakage from the battery Leakage could damage meter and lead to injury of user Do not modify the meter Changing the design may make the meter uns
4. IX SWHO 000 0 0 suuo HOA G 00 00 AOV 00 0 HOA L 09 09 09 0 HOA Sz 91 SL 91 0 HOA SO Ove AN 0 SHOA Ov HOA G 00 00 0 00 0 HOA L 09 09 09 0 HOA SZ SL st 0 6L 0 30A SO 001 00 Add 0 SHOA 90 sjenb3 88 ol obuey 8 8 835 53 UO peau ya ms 19S ol LUVHO NOILVH3dO 131 01 26 ACCESSORIES Carrying Cases Model 369 Model 369 S Cat No 10 1258 Cat No 10 1791 Model 369 T Case w Belt Loop Cat No 10 1608 Cat No 10 1269 Model 369 V Cat No 10 2959 27 Test Leads 78 133 42 Test leads w Screw on Alligator Clips 78 206 48 Test leads with Alligator Clips no probes 79 695 Test leads with Pin Cushion Clips 79 722 Test leads with Spike Clips MAINTENANCE FOR MODEL 310 TEL Battery Replacement If the pointer cannot be adjusted to full scale on the X1 X10 or X100 OHMS ranges replace the 1 5V bat tery Replace the 12V battery if the X1K OHMS range cannot be adjusted for full scale 1 5V Battery NEDA 910F or 910M PN 37 21 12V Battery A23 PN 37 60 Fuse Replacement If none of the OHMS ranges work replace the fuse Use a 1 16 AMP 5 mm x 20 mm fuse PN 3207 112 Cleaning Plastic Window The plastic window has been treated at the factory to dissipate static charges If cleaning is necessary use cotton dipped in a solution of common household detergent and water After cleaning allow the solu tion to dry wi
5. N Insert the test leads into the appropriate jacks Red to VeOeM Black to COM Set Range Switch to appropriate OHMS range Short test probes together Adjust OHMS ADJUST CONTROL until meter reads zero ohms Connect probes to the circuit or component to be measured Read ohms on OHMS scale multiply value read by multiplier indicated by the switch Operate Polarity Switch to observe forward and reverse resistance of the circuit or component If appropriate observe the capacitive kick of the circuit or component as the Polarity Switch is operated A fuse protects the X1 range against accidental over loads If the fuse should blow all OHMS ranges will not operate DO NOT TOUCH circuitry while making measurements DISCONNECT or ISOLATE the device being tested from other circuitry NOTE 1K equals 1000 20 RESISTANCE MEASUREMENTS POLARITY REVERSING SWITCH OHMS ADJUST CONTROL SAFETY FIRST 21 DC CURRENT MEASUREMENTS 0 6 through 0 600 Milliamperes 1 2 3 Insert the test leads into the appropriate jacks Red to VeOeM Black to COM Set Range Switch to appropriate mA range Connect the probes in series with the circuit to be measured use alligator clips 4 Set the Polarity Switch to desired polarity 5 6 Read current on appropriate black AC DC scale Turn circuit on The approximate voltage drop burden voltage acr
6. ROVISIONS OF THE WARRANTY ARE EXPRESSLY IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED The purchaser agrees to assume all liability for any damages and bodily injury which may result from the use or misuse of the product by the purchaser his employees or others and the remedies provided for in this warranty are expressly in lieu of any other liability Triplett Corporation may have including incidental or consequential damages Some states USA ONLY do not allow the exclusion or limitation of incidental or conse quential damages so the above limitation or exclusion may not apply to you No represen tative of Triplett Corporation or any other person is authorized to extend the liability of Trip lett Corporation in connection with the sale of its products beyond the terms hereof Triplett Corporation reserves the right to discontinue models at any time or change specifi cations price or design without notice and without incurring any obligation This warranty gives you specific legal rights and you may have other rights which vary from state to state TRIPLETT CORPORATION BLUFFTON OHIO 1 800 874 7538 www triplett com 30 TRIPLETT Triplett Corporation One Triplett Drive Bluffton OH 45817 800 TRIPLETT FAX 419 358 7956 www triplett com Triplett Corporation All Rights Reserved
7. TRIPLETT _ Model 310 TEL Type 3 Hand Sized VOM Instruction Manual amp TRIPLETT TABLE OF CONTENTS SAFETY RULES INTRODUCTION SPECIFICATIONS GENERAL INSTRUCTIONS 12 Test Leads Range Selection Scale Selection Polarity Selection Changing Settings Zero Adjustment Other Considerations CONTROL LOCATION DIAGRAM DC VOLTAGE MEASUREMENTS AC VOLTAGE MEASUREMENTS RESISTANCE MEASUREMENTS DC CURRENT MEASUREMENTS MEASURING OUTPUT VOLTS dB OPERATION CHART ACCESSORIES MAINTENANCE 84 871 11 06 SAFETY RULES WARNING This tester has been designed with your safety in mind However no design can completely protect against in correct use Electrical circuits can be dangerous and or lethal when lack of caution or poor safety practices are used A WARNING A This meter is NOT to be used to measure High Energy circuits power circuitry fused at greater than 4KW such as distribution circuits power entrance circuits etc or circuits classified by CE as CATEGORY III CAT III SAFETY RULES AND WARNINGS Read all instructions in this manual before using this meter Prior to using this meter in any situation which could result in injury to the user in order to verify that the meter is functional and producing a valid reading test the meter on a circui
8. afe and may result in injury to the user Do not mistake a downscale reading as an indication that no potential is present Dangerous potentials may be present that may result in user injury When replacing the battery dispose of the depleted battery in accordance with any prevailing safety or environmental regulations A static charge on the face of the meter may cause the meter to produce inaccurate readings which could lead to user injury This condition is usually observed in dry climates when the face of the meter is rubbed with a cloth Apply Antistat solution or mild detergent to the face of the meter to dissipate the static charge READ THE MANUAL Read this Instruction Manual carefully and completely Voltages and currents within the capability of this test equipment can be hazardous Follow the instructions in this manual for every measurement Read and un derstand the general instructions before attempting to use this tester Do not exceed the limits of the tester SAFETY CHECK Double check the switch setting and lead connections before making measurements Are you following all of the instructions Disconnect the tester or turn off the power before changing switch positions Do not connect to circuits with voltage present when switch is in any ohms or current position When replacing fuses use only specified type fuses and insert in correct fuse holder 7 DO NOT TOUCH Do not touch exposed wiring
9. et the meter to the appropriate range mode or polarity before connecting it to the circuitry to be tested Never attempt to make voltage measurements with the Function switch set to any of the OHMS or MA ranges Doing so may damage the meter and or injure the user Do not rotate the Range switch or move the Polarity switch with the test leads connected to the circuitry to be tested Doing so may damage the meter and or injure the user Before using the meter examine both the meter and the test leads for damage Do not use the meter if damage damaged insulation exposed metal cracked case burnt smell etc is evident Do not use this meter to make measurements in adverse environments such as rain snow fog or locations with steam explosive gases or dusts Doing so may damage the meter and or injure the user 4 Make sure both test leads are fully inserted into their respec tive input jacks Black lead into COM and Red lead into Ve0eM A loose test lead may cause the user to misinter pret the dangers present the meter may read Zero when dangerous voltage is present or the loose lead may accidentally short to other circuitry or shock the user Do not use the meter if either the meter or the test leads are wet either from exposure to the weather or after cleaning the case of the meter Doing so may cause injury to the user Avoid usage near strong magnetic fields magnets loudspeakers transformers motors co
10. hut off before the Range Switch or Polarity Reversing Switch position is changed This practice will result in an increased life and reliability for the tester as well as establishing a good safety practice Zero Adjustiment____________ The Meter Zero Adjust Screw is located near the cen ter of the tester It should be periodically adjusted so the meter pointer is on zero with no input into the tester 13 Other Considerations Readings on the sensitive voltage current and resis tance ranges may sometimes be different than calcu lated values Thermo electric or electro chemical re actions can sometimes generate voltage and current in a circuit due to elevated temperatures contact of dissimilar metals chemical fumes or moisture Also the user s fingers should never touch the metal parts of the test probes since body resistance can cause erroneous readings particularly on the high ohmme ter ranges Care Although this instrument is portable and rugged it Should be treated with care Do not drop it or handle it roughly Avoid placing it on a bench where machine tools are used or severe vibration is encountered When possible keep it in a place of moderate tem perature Avoid subjecting it to extreme temperatures and severe temperature changes If the tester has not been used for a long period of time rotate the switch in both directions several times to clean the switch contacts 14 CONTROL LOCATION DIAGRAM
11. ils relays contactors electromagnets etc The meter may display readings that are in error causing the user to misinterpret the hazards present For example the meter may indicate a low voltage when high voltages are actually present Avoid usage near strong electrostatic fields high voltage power lines televisions computer monitors etc The meter may display readings that are in error causing the user to misinterpret the hazards present For example the meter may indicate a low voltage when high voltages are actually present Avoid usage near strong RF fields radio or television trans mitters etc The meter may display readings that are in error causing the user to misinterpret the hazards present For example the meter may indicate a low voltage when high voltages are actually present Do not touch the tips of the test leads when making a meas urement Do not touch live circuitry when making a measurement Do not apply more than 1200 volts DC AC rms sine between the test leads and the earth ground Doing so may damage the meter and or injure the user If there is any doubt about the condition of the meter i e safe vs unsafe remove the meter from service and secure it in a location that will prevent its unintentional use Do not use the meter if it does not appear to work correctly on all ranges and in all modes Do not use the meter if it has undergone long term storage under unfavorable conditions
12. oss the Model 310 TEL is shown in the specifications Generally this drop will not affect the circuit But in low voltage circuits it may be necessary to compen sate for this drop DISCONNECT POWER before connecting the Model 310 TEL into the circuit 22 DC CURRENT MEASUREMENTS POLARITY REVERSING SWITCH OHMS ADJUST CONTROL LOAD SAFETY FIRST 23 MEASURING OUTPUT VOLTS dB POLARITY REVERSING SWITCH OHMS ADJUST CONTROL AUDIO AMPLIFIER son SAFETY FIRST To read Output Voltage use the same procedure as shown on page 18 for AC Voltage and convert readings to dB using the chart on page 25 24 MEASURING OUTPUT VOLTS dB Ber 96 PEt 08 80 92 Het Set 02 8 91 pkt Oct 8 91 vbt ZF 0 8 9 e 0 z v 9 ux D Lal T gt ra o ZI FI 9 8I 0 2 ve 1 1 1 1 1 1 TET L OR sq ELL KA gt 0JF0 25 HILF 0 pea 1581 pay pue 132 WOI 01 pea 1881 13818 au 199UU00 ILON OL OLX 09 009 VIN 009 0 vu 09 09 VIN 09 0 yu p 01 09 9 VIN 9 0 Lor 001 09 9 VIN 9 0 vu 0001 X XOZ 0 XIX SINHO Bal 07 0 00L X XOZ 0 001X SINHO Ban Z 0 0LXX0Z 0 01X SINHO 000002 0 02 0
13. place such products which under normal use and service disclose the defect to be the fault of our manufactur ing with no charge within three years of the date of original purchase for parts and labor If we are unable to repair or replace the product we will make a refund of the purchase price Consult the Instruction Manual for instructions regarding the proper use and servicing of instruments and test equipment Our obligation under this warranty is limited to repairing replacing or making refund on any instrument or test equipment which proves to be defec tive within three years one year on calibration from the date of original purchase This warranty does not apply to any of our products which have been repaired or altered by unauthorized persons in any way so as in our sole judgment to injure their stability or reliability or which have been subject to misuse abuse misapplication negligence acci dent or which have had the serial numbers altered defaced or removed Accessories including batteries and fuses not of our manufacture used with this product are not covered by this warranty To register a claim under the provisions of this warranty return the instrument or test equip ment to Triplett Corporation Bluffton Ohio 45817 transportation prepaid Upon our inspec tion of the product we will advise you as to the disposition of your claim ALL WARRANTIES IMPLIED BY LAW ARE HEREBY LIMITED TO A PERIOD OF ONE YEAR AND THE P
14. t s known to have potentials equivalent to the potential that is to be measured For example before using the meter to determine if an AC power line is energized with 120VAC test the meter on a line known to be energized with 120VAC Do not exceed the maximum voltage limitations of this meter see product specifications Doing so may damage the meter and or injure the user When using this meter in schools and workshops responsible teachers or skilled personnel must control the usage of this meter Follow the recommendations of any Trade Organizations or Regulatory Agencies whose scope encompasses the use of this meter 3 Do not use this meter with its battery cover open its rear case open or with parts removed Do not open this meter for maintenance without first disconnecting the test leads from all external circuitry Repairs and maintenance must only be carried out by qualified service personnel or qualified electricians technicians who know the dangers of and the safety rules applicable to this type of equipment Use caution when measuring circuits containing capacitors Capacitors can store dangerous levels of electricity even when the circuitry which they are in has been disconnected from its power source Use caution when working with voltages above 25 volts AC or 35 volts DC Such voltages may cause a life threatening electrical shock e This meter is not for use by children Always s
15. tal overloads A fuse is used to protect the RX1 range The fuse and batteries can be easily replaced by removing the back cover Small enough to be carried in your tool box glove com partment brief case or shirt pocket the Model 310 TEL allows you to have 20 000 ohms per volt DC and 5 000 ohms per volt AC sensitivity wherever you need it A convenient Polarity Reversing Switch electrically reverses the test lead connections correcting acciden tal downscale readings and permitting capacitive kick readings on the Ohmeter ranges Versatility and readability have not been sacrificed in order to provide a portable VOM The Model 310 TEL offers 16 different ranges that can be easily read on only 3 clearly defined scale areas A single selector switch allows you to switch easily from range to range and function to function SPECIFICATIONS DC Volts Ranges 0 3 15 60 300 20 000 ohms per volt Accuracy 3 of full scale value AC Volts Ranges 0 3 15 60 300 5 000 ohms per volt Accuracy 4 of full scale value on 60Hz sine wave at 77 F Ohms Ranges 0 20 200K 2 Meg 20 Meg 200 2K 20K 200K center scale Accuracy 3 of DC scale length with fully charged battery Ohmmeter Specifications Range X1 X10 X100 X1K Max Voltage Volts 1 6 1 6 1 6 14 0 Max Current mA 8 0 0 8 08 07 Max Power mw 3 2 32 032 245 DC Milliamperes Ranges 0 6 6 60 600 Accuracy 3 of full scale value B
16. thout rubbing the resultant detergent film will effectively dissipate static charges CAUTION Solvents and liquids used in radio and TV shop work may craze or scar the plastic window if applied to it 28 Calibration____________ With normal use readjustment of this VOM should not be necessary An occasional check of the VOM against a known reference voltage or another VOM is good practice If there is a question about the accu racy of the VOM it should be returned to the factory oran authorized service center for a calibration check TRIPLETT PRODUCT RETURN INSTRUCTIONS In the unlikely event that you must return your Triplett equipment for repair the following steps must be taken 1 Call 1 800 TRIPLETT to obtain a Return Material Authorization RMA number from Customer Service 2 Enclose a copy of the original sales receipt showing date of purchase 3 Clearly print the RMA number on the outside of the shipping container 4 Return to Triplett Corporation One Triplett Drive Bluffton OH 45817 ATTN Repair Dept Be sure to include a full description of the problem and a tele phone number street address or email address where you can be contacted and a return address where the meter can be shipped to upon repair 29 TRIPLETT LIMITED WARRANTY The Triplett Corporation warrants instruments and test equipment manufactured by it to be free from defective material or workmanship and agrees to repair or re
17. urden Voltage full scale Approx 330mV on 600mA range Approx 250mV on other ranges 10 Meter 50 yA 250 mV Pivot and Jewel Overload Protection Meter movement protected by diodes RX1 range protected by fuse Voltage ranges protected by high impedance Polarity Reversal The Polarity Switch reverses the polarity of the jacks on all ranges Test Lead Polarity DC Voltage Lead connected to VeOeM jack is positive with polarity reversal switch in position DC Current Lead connected to VeOeM jack is positive with polarity reversal switch in position Ohms Positive battery of Ohmmeter is connected to the V O M jack with polarity reversal switch posi tion Batteries One 1 5 volt N cell NEDA 910 PN 37 21 One 12 volt Eveready A23 PN 37 60 Fuse 1 16A PN 3207 112 Weight Approximately 14 oz Accessories supplied with Model 310 TEL 1 Test leads w Screw on Alligator clips PN 79 153 2 Batteries One 1 5V and One 12V 3 Instruction Manual PN 84 871 11 GENERAL INSTRUCTIONS Control Locations _ For a diagram of the Model 310 TEL please refer to page 15 Test Leads Check the test leads periodically Leads that are worn have damaged insulation damaged plugs damaged probes or loose parts should be replaced The following section should be read carefully It con tains instructions and precautions to be observed in making measurements with the tester The alligator clips pro
18. vided with the tester fit over the end of the test probes When measuring high volt age these alligator clips allow measurement without handling the test probes ALWAYS SHUT OFF THE POWER source before attempting to connect alligator clips Range Selection When the approximate value of the quantity being mea sured is not known ALWAYS START ON THE HIGH EST RANGE For greater accuracy choose the range which will allow readings to be taken in the upper right hand portion of the scale See Operation Chart on page 26 12 Scale Selection Readings are taken on the scale having the appropri ate significant figures both 3 and 300 volts are read on the 0 300 scale by multiplying or dividing by a factor of 10 or 100 as indicated by the range scale ratio i e on the 3 volt range divide the scale read ings by 100 See Operation Chart on page 26 Polarity Selection The Polarity Reversing Switch allows the user to elec trically reverse the test lead connections That is when the user mistakenly connects the test leads to a cir cuit and obtains a downscale reading the Polarity Reversing Switch may be operated to obtain an up scale reading The Switch may also be operated in the Ohms ranges to observe forward and reverse resistance of a cir cuit or to observe the capacitive kick of a circuit Changing Settings __ The test probes should be disconnected from the volt age source or the source s
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