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1. 119 99 mA 1 count 200 mA 199 9 mA 2000 mA 1999 mA 0 3 of reading 119 99 A 1 count 20A through 20 A input jack Maximum burden voltage 0 3 V at 200 mA with supplied 1 V at 2000 mA test leads 2 5 V 0 25 V across 20A jacks at 20 A Response time 1 second Overload protection 2 A 250 V fuse in series on mA input jack 20 A range unfused AC CURRENT TRUE RMS FROM 10 to 100 OF RANGE MAXIMUM MAXIMUM RANGE NDICATION FREQUENCY ACCURACY INPUT 200 pA 199 9 nA 40Hz to 10KHz 40196 ofrdg 4cnts 10KHz to 20KHz 2 ofrdg 4cnts 2mA 1999mA 40Hzto 10KHz 1 ofrdg 4cnts 10KHz to 20KHz 2 of rig 4onts 20mA 1999mA 40Hzto10KHz H1 ofrdg 4onts 10KHz to 20KHz 200 mA 199 9mA 40Hz to 10KHz 10KHz to 20KHz 2000 mA 1999mA_ 40Hz to 2KHz 19 99A 40Hz to 2KHz 2 of rdg 4cnts 3 196 of rdg 4cnts 2 of rdg 4cnts 1 of 1 of rdg 4ents 20 A through 20A input jack 0 3 V at 200 mA 1 V at 2000 mA 2 5 V 0 25 V across 20A jacks at 20 A Maximum burden voltage with supplied test leads Response time 3 second 2 A 250 V fuse in series on m input jack 20 A range unfused Overload protection SPECIFICATIONS RESISTANCE GENERAL SPECIFICATIONS MAXIMUM OVERLOAD Temperature range 2000 199 90 0 2 of rdg 2cnts Storage 20 C to 602. Normal mode rejection Common mode rejection Response time Input Impedance 0 1 of reading 1 count All ranges dc ac peak 50 dB minimum at 50 60 Hz 120 dB minimum at dc and 50 60 Hz with 1 kQ unbalance second 10 MQ AC VOLTAGE TRUE RMS FROM 10 to 100 OF RANGE MAX INPUT VOLTAGE MAXIMUM RANGE INDICATION FREQENCY ACCRACY 1999mV 40Hzto 1KHz 0 5 of rdg 4cnts 2 of rdg 4cnts 5 of rdg 4cnts 20 KHz to 40 KHz 10 of rdg 4cnts 40 Hzto 1 KHz 0 5 of rdg 4cnts 1 KHz to 10 KHz 2 of rdg 4cnts 10 KHz to 20 KHz 5 of rdg 4cnts 20 KHz to 40 KHz 10 of rdg 4cnts 40 Hzto 1 KHz 0 5 of rdg Acnts 1 KHz to 10 KHz 2 of rdg 4cnts 10 KHz to 20 KHz 5 of rdg 4cnts 20 KHz to 40KHz 14 10 of rdg 4cnts 1999V 40Hzto 1 KHz 0 5 of rdg 4cnts 1 KHz to 10 KHz 294 of rdg 4cnts 200mV 750 V ms 2V 1 999V 1000 V rms 200V 1000 V 1000 V 40 Hzto 1 KHz 0 596 of rdg 4cnts Max Input Not to exceed the Volt Hertz product of 10 Input impedance 10 MQ in parallel with 100 pF Common mode rejection 60 dB minimum at 50 60 Hz Response time 3 seconds maximum SPECIFICATIONS DC CURRENT MAXIMUM INPUT MAXIMUM INDICATION ACCURACY 1199 9 LA 1 999 mA 0 2 of reading
3. 8 INTRODUCTION The B amp K Precision Model 2831B bench type 3 1 2 The unit is housed in a rugged attractive plastic case and the digit multimeter is a highly versatile instrument offering carrying handle doubles as a sturdy tilt stand The tilt stand can standard functions of voltage current with a 20 A range be folded on top of the instrument to allow stacking with your and resistance measurements In addition it also includes other instrument diode test and continuity functions Safety features include safety jacks safety test leads and extensive overload protection including a high energy fuse The instrument is easy to use as all functions are selected from a panel of very logically laid out and identified B amp K Precision offers a full line of optional accessories pushbuttons The 3 1 2 digit LED display features 0 43 for the Model 2831B which can further expand the capabilities digits with automatic minus sign and auto zero capability and usefulness of the instrument Please contact your local B amp K Precision distributor or B amp K Precision for more information on the latest accessories SPECIFICATIONS All accuracies specified at 23 C 5 C 75 maximum relative humidity DC VOLTAGE MAXIMUM MAX RANGE INDICATION ACCURACY Input 200 mV 199 9 mV 2 ET V 20V 19 99 V 200 V 199 9 V 1200 V 1200 V Max Input
4. C 2KO 1 999KQ 450 V 20KQ 19 99KO 0 2 of rdg tent A de ac rms Humidity range 90 maximum to 35 C except 200KQ 199 9KQ All ranges 80 maximum on 2000 k Q and E 000 ko ases 20 M Q range 70 maximum to 40 C non condensing 20 MQ 19 99 wo 0 5 of rdg cns n f Maximum common 500 V Open circuit volage 5 V maximum loaded with mode voltage 10MQ Display LED 0 43 character height Response time 3 second 20 seconds on 20 MQ range Power requirements 100 120 220 240 V 50 60 Hz SW PIODESTESI Dimeensions WxHxD 261 x 71 x 211 mm Tested on 2 KQ range 1 mA test current 10 27 x 2 79 x 8 3 in CONTINUITY Weight 1 63 Kg 3 6 Ibs Audio tone sounds when resistance is less than 10 ohms o typical Accessories supplied Test leads 2 Instruction manual 1 Spare 2 A fuse 2 OPTIONAL ACCESSORIES Model PR 21 Model PR 23 Model PR 28A Isolation Direct Probe Demodulator Probe High voltage Probe Additional Accessories See your local TL 2A Replacement Test Leads B amp K Precision distributor for more details Model TP 30B Temperature Probe CONTROLS AND INDICATORS on A V Q Jack Input jack for voltage measurement resistance measurement Diode test and continuity test COMmon Jack Input for common test lead for all measurements mA Jack Input for 200 LA to 2 A dc or ac current ranges 20 A Jack Input for 20 am
5. K Precision Corp 1031 Segovia Circle Placentia CA 92870 within fifteen 15 days from proof of purchase Exclusions This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alternations or repairs It is void if the serial number is alternated defaced or removed B amp K Precision Corp shall not be liable for any consequential damages including without limitation damages resulting from loss of use Some states do not allow limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you This warranty gives you specific rights and you may have other rights which vary from state to state TEST INSTRUMENT SAFETY 9 continued from inside front cover Keep one hand in the pocket while handing an instrument probe Be particularly careful to avoid contacting a nearby metal object that could provide a good ground return path When using a probe touch only the insulated portion Never touch the exposed tip portion 10 Some equipment with a two wire ac power cord including some with polarized power plugs is the hot chassis type This includes most recent television receivers and audio equipment A plastic or wooden cabinet insulates the chassis to protect the customer When the cabinet is removed for servicing a serious shock hazard exists if the chassis is touched Not only does this present a dangerous shock hazard but dama
6. BK PRECISION Instruction Manual Model 2831C 3 1 2 Digit Bench Type Digital Multimeter TEST INSTRUMENT SAFETY An electrical shock causing 10 milliamps of current to pass through the heart will stop most human heartbeats Voltage as low as 35 volts dc or ac rms should be considered dangerous and hazardo s since it can produce a fatal current under certain conditions Higher voltages are even more dangerous Observe the following safety precautions 1 Do not exceed the following input ratings Personal injury or daniage to the instrument may result DC VOLTS Range 2V Ikv 1200 V dc ac peak DC VOLTS Range 200mv 750V dc ac pk AC VOLTS Range 2V Ikv 1000 V rms AC VOLTS Range 200mv 750V rms OHMS 450 V dc or ac rms 20014 2 A 2 A fuse protected 20A 20 A unfused COM Do not float more than 500 volts from earth ground 2 Remove test leads from the instrument and point of measurement before replacing fuses or performing any servicing on the multimeter 3 Use only shrouded safety type test leads like those supplied Periodically inspect insulation for any burns cuts or breaks Never use test leads with exposed bare wires or poor insulation 4 Turn off equipment while making test connections in high voltag circuits Discharge high voltage capacitors after removing power 5 For voltage or current measurements in high voltage equipment do not touch equipment meter or test leads while power is applied 6 If possib
7. RATING INSTRUCTIONS CONTINUITY TESTING 1 Remove power from the equipment under test 2 Press the Q switch WA Select both 200 Q and 2 KA resistance ranges press both 200 and 2 K switches simultaneously Connect the red test lead to the V jack and the black test lead to the COM jack The red lead is polarity tn Connect the test leads to the desired measurement points If the resistance between the two points is less than 10 ohms typical the continuity tone will sound Disengaging one of the two switches 200 Q and 2 KO switch at out position will disable the continuity tone The instrument will then be operating in standard ohms mode DIODE TESTING vo ma U gt ua a Press the Q switch Press the 2 K switch Connect the red test lead to the V Q jack and the black test lead to the COM jack The red lead is polarity The meter uses conventional current lead polarity for diode testing i e current flow assumed from positive to negative To check diode forward voltage V connect the red test lead to the anode and the black test lead to the cathode Diodes and semiconductor junctions with normal V of less than 2 0 V can be checked The display indicates diode forward voltage Normal diode voltages are approximately 0 3 V for germanium diodes 0 6 V for silicon devices and 1 6 V for light emitting diode LED s An overrange indicates an open diod
8. ac dc current functions and 2000 KQ 2 MQ range for resistance function 15 16 20 A 20 MO Switch Selects 20A range for ac dc current func tions Used in conjunction with 20 A jack 4 Also selects 20 MQ range for resistance function POWER Switch Tums instrument ON and OFF Power on ind icated by presence of characters on display Display 3 1 2 digit LED display with automatic decimal point and minus sign Indicates to 1999 counts Over range indicated by a 1 displayed at the leftmost digit while all other digits remain blank E SERESICHSHOII 2831D DIGITAL MULTIMETER 200 UNFASED i WA u IR O O V 0 di gm sg 12 Fig 1 Controls and indicators 7 OPERATING INSTRUCTIONS Use of test equipment may expose the operator to electric shock hazards Observe all instructions contained in the TEST INSTRUMENT SAFETY section of this manual Before using this instrument CAUTION The TEST INSTRUMENT SAFETY section of this manual lists maximum voltage and current input limits which must be observed Failure to adhere to these limits may result in damage to the instrument PRELIMINARY Plug the unit into an ac outlet of the appropriate voltage and turn it on by depressing the POWER switch VOLTAGE MEASUREMENTS N Es Press the V function switch Select ac or dc measurement using the AC DC switch Set for dc measurement by
9. e A shorted diode reads near 0 V To check the reverse bias condition of a diode reverse the test lead connections to the device The reading should be the same as with open test leads an overrange A lower reading indicates a leakydiode MAINTENANCE WARNING The following instructions are for use by qualified service personnel only To avoid electrical shock do not perform servicing other than contained in the operating instru ctions unless you are qualified to do so Remember that ac line voltage is present on line voltage input circuits any time the instr ument is plugged into an ac outlet even if turned off Always unplug the unit before performing servicing procedures FUSE REPLACEMENT There are two fuses in the unit one for the mA current range and one for the main power supply If your unit continues to operate digits lit but fails to measure current check the two current fuses Current Range Fuse Note The fuse most likely to open first can be inspected and changed without case removal It is located on the rear panel of the unit Simply use a flat blade screwdriver to rotate the terminal counterclockwise Then remove the entire assembly including the fuse If this fuse is blown replace it with the appropriate 2 A 250 V 5 x 20 mm fast blow fuse Part number 196 300 2 000 Then replace the fuseholder Power Supply Fuse If your unit does not operate at all no digits lit check
10. ge to test instruments or the equipment under test may result To make measurements in hot chassis equipment always connect an isolation transformer between the ac outlet and the equipment under test The B amp K Precision Model TR 110 or 1604 Isolation Transformer or Model 1653 or 1655AC Power Supply is suitable for most applications To be on the safe hide all two wire ac powered equipment as hot chassis unless you are sure it has an isolated chassis or an earth ground chassis 11 B amp K Precision products are not authorized for use in any application involving direct contact between our product and the human body or for use as critical component inia life support device or system Here direct contact refers to any connection from or to our equipment via any cabling or switching means A critical component of a life support device or system whose failure to perform can be reasonably expected to cause failure of that device or system or to affect its safety or effectiveness i 12 When testing ac powered equipment remember that ac line voltage is usually present on some power input circuits such as on off switch fuses power transformer etc any time the equipment is connected to an ac outlet even if the equipment is turned off 13 Never work alone Someone should be nearby to render aid if necessary Training in CPR cardio pulmonary resuscitation first aid is highly recommended BK PRECISION 1031 Segovia C
11. ircle Placentia CA 92870 7137 USA TEL 714 237 9220 FAX 714 237 9214 P N 481 316 9 001 www bkprecision com Printed in Taiwan 1999B amp K Precision Corp
12. le familiarize yourself with the equipment being tested and the location of its high voltage points However remember that high voltage may appear at unexpected points in d fective equipment 7 Use an insulated floor material or floor mat to stand on and an insulated work bench surface make certain such surfaces are not damp or wet continued on inside back cover Instruction Manual for Model 2831C Bench Type 3 1 2 Digit MULTIMETER ICAA BK REL Ww 1031 Segovia Circle Placentia CA 92870 TABLE OF CONTENTS Page Page TEST INSTRUMENT SAFETY Inside Front Cover Current Measurements 9 Resistance Measurements 9 INTRODUCTION 1 Continuity Testing 10 Diode Testing 10 SPECIFICATIONS 0 000 000 cece eee eee 2 MAINTENANCE 11 OPTIONAL ACCESSORIES 5 Fuse Replacement US SRI ERN RE ERA HE 11 Line Voltage Selection 12 CONTROLS AND INDICATORS 6 Test BG ads ilaele A 12 Instrument Repair Service 12 CONTROLS AND INDICATORS 7 WARRANTY SERVICE INSTRUCTIONS 14 OPERATING INSTRUCTIONS 8 Preliminary parapetto iaia whos See Be 8 LIMITED ONE YEAR WARRANTY 15 Voltage Measurements
13. om the circuit under measurement and open the normal circuit path where the measurement is to be taken Connect the meter in series with the circuit meter or equipment under test or cause 6 Apply power to the circuit and read the measured value on the personal injury display For current measurements greater than 2 A high current test leads should be used High RESISTANCE MEASUREMENTS current measurements with standard test 1 Remove power from the equipment under test leads could cause the leads to heat up This 2 Press the Q function switch not only affects the accuracy of the measurement but could result in injury to the operator 3 Connect the red test lead to the V Q jack and black test lead to the COM jack The red lead is polarity 4 Connect the test leads to the desired point of measurement Tab ress ne a UD En and observe the reading on the display 2 Select ac or dc measurement using the AC DC switch Set for dc measurement by setting switch to out position Push 5 If the expected resistance range is unknown start with the switch in for ac measurement lowest range If an overrange is indicated continue 3 If the current to be measured is unknown start with the meter selecting higher ranges until the overrange indication in the 20 A range using the 20 A jack If the expected current ceases At this range greatest resolution is achieved might exceed 2 A use high current test leads 9 OPE
14. on open account must include payment in the form of a money order or credit card For the most current repair charges contact the factory before shipping the product Contact B amp K Precision to obtain a R turn Authorization number before shipping the product to B amp K The RA number must appear on the address label Return all merchandise to B amp K Precision Corp with pre paid shipping The flat rate repair charge includes return shipping to locations in North America For overnight shipments and non North America shipping fees contact B amp K Precision Corp B amp K Precision Corp Phone 714 237 9220 1031 Segovia Circle Facsimile 714 237 9214 Placentia CA 92870 Email service bkprecision com www bkprecision com Include with the instrument your complete return shipping address contact name phone number and description of problem LIMITED ONE YEAR WARRANTY B amp K Precision Corp warrants to the original purchaser that its product and the component parts thereof will be free from defects in workmanship and materials for a period of one year from the date of purchase B amp K Precision Corp will without charge repair or replace at its option defective product or component parts Returned product must be accompanied by proof of the purchase date in the form a sales receipt To obtain warranty coverage in the U S A this product must be registered by completing and mailing the enclosed warranty card to B amp
15. p dc or ac current range AC DC Switch Selects ac or dc in voltage and current functions Engage switch set to in position for ac disengage set to out position for dc VSwitch Selects voltage function A amp Switch Selects current function H Q Switch Selects diode test function resistance functions and continuity test function When both 200 Q and 2 K resistance function are selected this switch enables audible continuity test Continuity tone is enabled when switches are engaged 200 mV 200 pA 200 Q e Switch Selects 200 mV range for ac dc voltage functions 200A range for ac dc current functions and 200 Q range for resistance function Enables continuity test in conjunction with switch 8 and 10 10 2 V 2 mA KQ DE Switch Selects 2 V range for ac dc voltage erent functions 2 mA range for ac dc current functions and 2 KQ range for resistance function Also selects diode test function 20 V 20 mA 20 KO Switch Selects 20 V range for ac dc voltage functions 20 mA range for ac dc current functions and 20 KO range for resistance function 12 200 V 200 mA 200 KQ Switch Selects 200 V range for ac dc voltage functions 200 mA range for ac dc current functions and 200 KQ range for resistance function 1200 VDC 1000 VAC 2000 mA 2000 KO Switch Selects 1200 V range for dc voltage function 1000 V range for ac voltage function 2000 mA 2 A range for
16. power supply fuse See Fig 2 Note This fuse should not open unless some defect occurs in the instrument Replace it only after investigation of the reason for its opening Use the appropriate value 0 25 A 250 V fast blow part number 196 300 0 250 for 100 120V operation or 125 mA 250 V fast blow part number 196 300 0 125 for 220 240 V operation MAINTENANCE LINE VOLTAGE SELECTION This instrument is the universal line operation 100V 120V 220V and 240V The below is explaining the user how to charge fuse 1 Extract the fuse drawer from the AC socket with the aid of a screwdrive The extra safe fuse drawer can only be extracted with the aid of a flat blade screwdriver 2 Pullout the fuse from the fuse holder and charge the fuse rating in accordance with specific required 3 Plugging fuse holder into the Line voltage indication shown on the fuse drawer is correct Rotating the fuse holder before insert fuse drawer to have correct voltage indication 4 Install the fuse drawer into AC sollect TEST LEADS Periodically examine the test leads to ensure that the conductors are not intermittent or broken Also make sure that good contact pressure exists at the test lead receptacles Keep these areas free from dirt and corrosion Use shrouded safety type replacement test leads INSTRUMENT REPAIR SERVICE Because of the specialized skills and test equipment required for instrument repair and calibration many cu
17. setting switch to disengaged out position Push switch in for ac measurement If the voltage to be measured is unknown start with the 1200 VDC 1000 VAC range If an approximate voltage range is known simply press the switch for the range desired Greatest resolution is attained using the range closest to an over range for the voltage being measured Connect the red test lead to the V Q jack and the black test lead to the COM jack Connect the test leads across the circuit points to be measured Read the measured value from the display OPERATING INSTRUCTIONS CURRENT MEASUREMENTS 4 If an approximate current range is known simply press the switch for the range desired Greatest resolution is attained using CAUTION the range closest to an overrange for the current being measured a For current measurements of 2 A or less connect the red test For current measurements the meter must lead to the 2 A jack and the black test lead to the COM jack be connected in series with the load If b For current measurements greater than 2 A connect a red high incorrectly connected in parallel with the current test lead to the 20 A jack and connect a black high load the meter presents a very low current test lead to the COM jack impedance almost a short which may blow the fuse or damage the meter or equipment under test The 20 A range has on fuse protection and may severely damage the un Remove power fr
18. stomers prefer to rely upon B amp K Precision for this service We maintain a network of B amp K Precision authorized service agencies for this purpose To use this service even if the instrument is no longer under warranty follow the instructions given in the WARRANTY SERVICE INSTRUCTIONS section of this manual There is a nominal charge for instruments out of warranty REPLACE FUSE CAUTION AS SPECIFIED ALWAYS DISCONNECT POWER CORD BEFORE REMOVING COVER CURRENT REFER TO QUALIFIED SERVICE PERSONNEL eee THS EQUIPMENT MUST BE EARTHED TI So As Bak PRECIION gt na CORP Piaceniio CA 97670 8931 REPLACE FUSE 2A 250V AS SPECIFIED 3 D Fuse link Change fuse Change AC Power Source 24 B Fuse drower 13 WARRANTY SERVICE INSTRUCTIONS Warranty Service Please return the product in the original packaging with proof of purchase to the below address Clearly state in writing the performance problem and return any leads connectors and accessories that you are using with the device Contact B amp K Precision to obtain a Return Authorization number before shipping the product to B amp K The RA number must appear on the address label Non Warranty Service Return the product in the original packaging to the below address Clearly state in writing the performance problem and return any leads connectors and accessories that you are using with the device Customers not
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