User`s Manual
Contents
1. DC AC Q and the measuring range select switch to the DC 0 012 mA range voltage drop 220 mV Then read out the indication on the DC scale Fig 4 3 Clip On Current Transformer 1 By use of this transformer currents to the commercial frequencies can be measured without opening the circuit 2 Connect the red lead of the transformer to the v A Q terminal and the black lead to the terminal 3 Set the polarity select switch to DC AC Q and the measuring range select switch to the AC 3 V range Then read out the indication on the AC scale 4 The transformer provides 5 ranges of current 12 30 60 120 300 A These ranges can be selected by the selector switch attached to the transformer Read out the indication on the AC scale based on full scale values appropriate to the selected range IM 3201 E gt em 5 1 Adjustment In case of the accuracy of the tester becomes doubtful as the result that an excessive load of shock is applied to the tester the tester must be tested using other calibrated instrument If the accuracy is observed to be over the specified value the tester must be readjusted In case the resistor is burnt it must be replaced according to the circuit diagram and parts list in Section 3 8 and further the sensitivity of the tester must be adjusted in the following manner 1 Set the polarity select switch to and the2. instrument and in this manual or damage to the instrument n O Measurement lead This symbol indicates alternating current AC Use the lead supplied by Yokogawa for the instrument concerned Do not use a deteriorated or damaged lead Do not attach detach the lead to from the instrument prior to releasing the lead from the measured object This symbol indicates direct current DC RE This symbol indicates a fuse O Protection This symbol indicates a grounding line If there are any cracks or other damage in the case because of being drop ped or struck the instrument may not be safely insulated Do not use the in strument before any remedial measures are taken Indicates a hazard that may result in the loss of life N WARNING serious injury of the user unless the described in O Battery Fuse Replacement Prior to detaching the cover for replacing the battery or fuse release the truction i i l i E SINN SED measurement lead from the measured object and turn off the switch O Operating Environment Do not operate the instrument in a flammable or explosive atmosphere user and or physical damage to the product or other E CAUTION l nu odd Do not use the instrument when there is condensation on it equipment unless the described instruction is abided Do not operate the instrument with wet hands by Indicates a hazard that may result in an injury to the O Disassembly Disassemblement of the instrum
3. measuring range select switch to the DC 0 3 V range Apply DC 0 3 V and turn the semifixed resistor VR as indicated on the print board so that the pointer may indicate the full scale value correctly 2 Set the measuring range select switch to the AC 120 V range Apply AC 120 V and turn the semifixed resistor VR so that the pointer may indicate the full scale value correctly Above procedures make a complete adjustment on the DC AC and Ocircuits E a es 5 2 Fuse Replacement A CAUTION There is a risk of electrical shock to persons Prior to replacing the fuse disconnect the instrument from the circuit to be measured if connected to prevent an electrical shock hazard Do not operate the instrument when the case is left open Use only the specified fuse In case the fuse has blown remove the screw of the center of the bottom case Then replace the blown fuse with a new one of specified rating that is provided on the side surface of the case After Services When the instrument does not operate properly and needs repair please contact Yokogawa or the store where you bought the product IM 3201 E 6 Specifications 6 1 Specifications c Voltage 0 3 1 2 3 12 30 120 300 1 200 V 1 2 of full scale value Input Resistance 100 kQ V 3 of scale length 3 Central Scale Mark 10 Q for full scale value of 2 KQ 3 of full scale value Input Impedance 10 kQ V IE Accuracy in 12
4. the coil due to overcurrent nor bend the pointer arm 5 The measuring range select switch determines the duration of life of the instrument It employs a printed wiring switch which has low contact resistance and substantial stability and durability in both mechanical and electrical aspects 6 A convenient polarity select switch is provided for DC measurements 7 The instrument requires only one piece of R20P SUM 1 Battery replacement is easily conducted 8 Shock resistance plastic ABS resin is used for the case of the tester It is compact light and convenient to carry about IM 3201 E 2 Parts Identification 1 Scale 2 Knife edge 12 Case Pointer 3 Meter Cover 4 Cover Fixing Screw 5 Zero Adjust Screw 7 Zero ohm Adjust Knob 14 Bottom Case Fixing Screw N 6 Polarity Select Switch 8 Measuring Range Select Switch 13 Rubber Leg 11 OUTPUT Terminal 9 Common Terminal 10 V A Q Terminal Fig 2 1 Parts Identification 15 Measuring Probe Fig 2 2 Measuring Probe IM 3201 E 1 Scale 2 Knife edge Pointer 3 Meter Cover 4 Cover Fixing Screw 5 Zero Adjust Screw 6 Polarity Select Switch The scale has a built in mirror to avoid parallax in reading Look at the scale so that you can see the pointer is accurately aligned with the pointer reflected on the mirror and then read the value This is made of acrylic resin This is to set the pointer to zero with a screw
5. to the oo position This phenomenon appears more markedly as greater the capacity of a capacitor becomes Degraded capacitors will not deflect the pointer And shorted capacitors will not return the pointer in the oo direction These are defective capacitors In case of resistance measurement polarity of the self contained battery is positive at the terminal and negative at the V A Q terminal Take this relation into consideration when diodes or transistors are to be tested 3 7 Checking Battery Amount and Battery Replacement lt Checking the Remaining Amount of Battery gt The condition where the pointer does not come to zero even when the zero ohm adjust knob is turned clockwise to the extreme position is to indicate that the built in battery is worn out Replace the battery R20P 1 5 V one piece lt Battery Replacement gt A CAUTION Before starting the replacement of the battery disconnect the instrument from the circuit to be measured to prevent an electrical shock hazard Check polarity before installing the battery properly To replace the battery remove the screw of the center of the bottom case For battery installation follow the indication of polarity noted on the battery holder case IM 3201 E 3 8 Circuit Diagram Parts List Parts List rm DEmA DEV mAy ra Wire wound resistor 0 19 9 1200 120 12 1 2 12 012 3 1 2 3 12 30 120 300 1200 1200 300 120 3
6. 0 12 3 x 1x 100 x 10 KOFF Wire wound resistor 180 A V Q E R9 RD1PX 18 OF Ci y E RD1 2PX 180 OF RD1 4PX 110 kQF R2 R3 R4 R5 Rs R R1o R11R12 R13 R14 R1s R16 R17 R18 Ri9 R7 Ras RD1 4PX 8 kQF RosRos RD1 4PX 90 kQF Ri R7 R20 R24 RD1 4PX 180 kQF COM O e RD 4PX 900 kQF E ACQ SW RGO8V2K 1 8 MOF 2A S M1301 20 vm PS DC RGO8V3C 9 MOF Cole M ya A RGO8V3C 18 MOF am 5X sw VR3 RGO8V3C 90 MOF Ds x DX amp RGO8V3C 9 MOF VRo 1 RGO8V3C 1 8 MQF Ros RD1 2PX 900 kQF RD1 4PX 180 kQF ll PTH FRso TEES RD1 4PX 90 kQF RD1 4PX 11 3 KOF RD1 4PX 10 kQF ae RD APX 10 kOF Fig 3 3 Circuit Diagram RD1 4PX 50 kQF Wire wound resistor 8Q RD1 4PX 792 QF RD 4PX 79 2 kQF RD 4PX 203 OF RD 4PX 73 3 kOF RD1 2PX 1 45 OF RD 4PX 27 kQF Semifixed resistor approx 10 kQ Semifixed resistor approx 10 kQ Semifixed resistor 40 kQ Indicator 10 uA 9 kQ Germanium diode Germanium diode Silicon diode 1GZ61 Silicon diode 1GZ61 Silicon diode 1GZ61 Silicon diode 1GZ61 Film capacitor 0 22 uF 400 V Film capacitor 0 68 uF 200 V S M1301 20 2 A Dry Cell SUM 1 1 5 V Measuring Range Select Switch Polarity Select Switch Positive temperature coefficient resistor 602M IM 3201 E 1 This probe is intended to be used in the adjustment of high voltage electronic equipments such as television However the high voltage measurement on power lines is 4 1 Model 320310 12 kV DC High Tension Probe dangerous and must
7. 00 V range is 3 for DC or 4 for AC 2 The tolerance for the low frequency output has been expressed as a percentage of the value obtained by converting the maximum scale value dB to a voltage 3 The scale length of resistance measurement OHM is 110 millimeters Insulation Resistance DC 500 V 100 MO Withstand Voltage Between the electric circuits and case up to AC 50 Hz 3 400 V for 1 minute Battery R20P SUM 1 1 pc Dimensions Approx 190 x 124 x 71 mm Weight Approx 870 g Accessories The following items are supplied with each instrument at no extra cost Leadwires with probe and plug RDO31 1 pair Dry Cell JIS C 8501 Types SUM 1 1 5 V built in 1 pc Clip Adapter 1 pc Carrying Case 1 pc User s Manual 1 copy IM 3201 E ga 6 2 Accessory Specifications Model 320310 12 kV DC High Tension Probe Rating Voltage DC 12 kV Accuracy 5 of rating when connected to the tester 320110 Current Loss approximately 20 yA Allowable Input Voltage DC 15 kV Model 320410 12A DC Shunt Rating Current DC 12A Rated Voltage Drop 220 mV Accuracy 3 of rating when connected to the tester 320110 Model 320510 Clip On Current Transformer Order Discontinued Item Rating Current AC 12 30 60 120 300 A AC Accuracy 3 of rating when connected to the tester 320110 Frequency Characteristics less than x196 of indication value at 50 and 60 Hz IM 3201 E lt MEMO gt IM 3201 E ar YOKOGAW
8. A 4 Yokogawa Meters amp Instruments Corporation Yokogawa Meters 8 Instruments Corporation International Sales Dept Tachihi Bld No 2 6 1 3 Sakaecho Tachikawa shi Tokyo 190 8586 Japan Phone 81 42 534 1413 Facsimile 81 42 534 1426 YOKOGAWA CORPORATION OF AMERICA U S A Phone 1 770 253 7000 Facsimile 1 770 251 2088 YOKOGAWA EUROPE B V THE NETHERLANDS Phone 31 334 64 1611 Facsimile 31 334 64 1610 YOKOGAWA ENGINEERING ASIA PTE LTD SINGAPORE Phone 65 6241 9933 Facsimile 65 624 1 2606 YOKOGAWA AMERICA DO SUL S A BRAZIL Phone 55 11 5681 2400 Facsimile 55 11 5681 1274 YOKOGAWA MEASURING INSTRUMENTS KOREA CORPORATION KOREA Phone 82 2 551 0660 to 0664 Facsimile 82 2 551 0665 YOKOGAWA AUSTRALIA PTY LTD AUSTRALIA Phone 61 2 9805 0699 Facsimile 61 2 9888 1844 YOKOGAWA INDIA LTD INDIA Phone 91 80 4158 6000 Facsimile 91 80 2852 1441 YOKOGAWA SHANGHAI TRADING CO LTD CHINA Phone 86 21 6880 8107 Facsimile 86 21 6880 4987 YOKOGAWA MIDDLE EASTE C BAHRAIN Phone 973 358100 Facsimile 973 336100 LTD YOKOGAWA ELECTRIC RUSSIAN FEDERATION Phone 7 095 737 7868 Facsimile 7 095 737 7869 IM3E 2006 2
9. User s Model 320110 Manual Circuit Tester YOKOGAWA 4 IM 3201 E Yokogawa Meters amp Instruments Corporation 12th Edition Dec 2007 KP Thank you for purchasing this Model 320110 Circuit Tester To fully exploit and properly operate the instrument read this manual carefully prior to using the product Precautions for Safe Use E To avoid the risk of injury to personnel including electrical shock or even fatalities carefully observe and follow the warnings listed below When operating the instrument be sure to observe the cautionary notes given below to ensure correct and safe use of the instrument Yokogawa is by no means liable for N WARNING any damage resulting from use of the instrument in contradiction to these cautionary notes O Measurement This tester is designed for measurement of light electrical circuits For safe use do not use this instrument for the circuit exceeding 250 V including pow er lines Such strong electrical circuits may contain a surge voltage which is Danger Handle with Care several times stronger than that of circuit voltage thus creating a very dan This symbol indicates that the operator must refer to an explanation in gerous situation the User s Manual in order to avoid risk of injury or death of personnel Do not touch the I O terminals during the measurement of voltage because a high voltage may be generated on the measurement lead BI The following safety symbols are used on the
10. asurement with if the pointer points at zero Q when the maximum range provided and then continue to lower range shorting the V A Q terminal until proper range is obtained Do not select the switch while The pointer does not deflect when the fuse is burned out the pointer is still deflecting At the start of measurement always be sure to check it 3 Do not place the tester in strong magnetic fields or on steel Never use the instrument when the fuse is burned out plates to avoid possible pointing errors to avoid electrification lt happens when the instrument 4 When storing or carrying the tester turn off the measuring range falsely recognizes voltage applied measured objects as being select switch and set the polarity select switch to its center inactive position to avoid any possible damage Checking Measurement Range Make sure that the measuring range select switch is set properly and that the measurement lead and the measurement input terminal are connected appropriately Measuring high voltages erroneously while the range is in DC mA may cause personnel injury or damage to the instrument Prior to turning on off the measuring range select switch disconnect the measurement lead from the measured object Installation Location Be sure to place the instrument on a flat stable surface in a stable environment The measurement lead may get disconnected from the measurement terminals due to overturn or fall of the instrument If it
11. be avoided 2 Firmly connect the Protective Resistance Box of the high voltage probe to the terminal of the tester so that the probe may come to the V A Q terminal side of the tester and the clip adapter to the COM terminal side 3 Set the polarity select switch to DC AC Q and the measuring range select switch to the DC 1 2 V range qT Then read the value on the DC scale 4 Use of Accessories Additional Specifications y y Tester terminals gt QO cov van O Fig 4 1 12 kV DC High Tension Probe IN CAUTION When measuring high voltage observe the following safety precautions to avoid potential risks Make sure that the grounded leads are firmly connected Check the probes must not be wet or contaminated with foreign materials prior to measurement to avoid possible risks Wear a pair of gloves e g rubber gloves to ensure safety Avoid measuring high voltage on the power line to prevent possible hazards IM 3201 E 4 4 2 Model 320410 12A DC Shunt 4 3 Model 320510 Clip On Current Transformer Order Discontinued Item Fig 4 2 12A DC Shunt 1 This shut is best suited for the current measurement in power transistors or SCR circuits 2 Connect the banana plug of the terminal of the shunt to the v A Q terminal of the tester and the banana plug of the terminal to the terminal 3 Set the polarity select switch to
12. ce DC mA DC V AC V Q This is a common terminal for measurement The black lead which is one of accessories is connected here The red lead which is one of accessories is connected here This is to measure AC voltage including DC components The red lead is connected here This is made of shock resistance plastic ABS resin When replacing batteries remove this screw to open the back cover This instrument provides two lead wires i e one black and one red The clip adaptor can be used conveniently by being connected to the tip end of the black lead probe Table 1 Measuring Range IM 3201 E DC V 100 ko V ACV 10kQ V Fig 2 3 Scale 300 1200 1200 300 120 12 1 Measuring Range Select Switch OFF V 12 120 1200 DC ma Make sure to read and observe all the following cautions before 3 Operation starting measurement to ensure safety 3 1 Instruction for Use A o 1 Make sure prior to measurement that the pointer rests at the Checking Fuse zero position of the scale If not turn the zero adjust screw to Make sure prior to measurement that the fuse is not burned set it to zero Look at the scale so that you can see the pointer out is accurately aligned with the pointer reflected on the mirror and lt Checking Method gt Set the measuring range select switch then read the value to Q range The fuse operates normally 2 When the measuring value is unknown start me
13. driver if it does not rest at zero prior to measurement In the case of DC voltage or DC current measurement the polarity select switch is set to the DCj or DC position according to the polarity of the measuring circuit While in the case of AC voltage or low frequency output level or resistance measurement it is turned to DC AC Q This switch has a 3 contact switch to make deflecting angles of the pointer wider to clarify the polarity selection lt Center Position gt When the switch is rested at the center position the circuit is opened and the pointer coil is shorted thus the pointer does not deflect Set it to this position when carrying the instrument around 7 Zero ohm Adjust Knob 8 Measuring Range Select Switch When measuring resistance this is to adjust the pointer to zero of the OHM scale by shorting the tip ends of the measuring probes of the leads lt Checking batteries gt This is also used when checking the remaining amount of built in battery Refer to 3 7 Checking Battery Amount and Battery Replacement This is a switch to select an object to be measured and its measuring range depending on the purpose of measurement It consists of a printed wiring switch IM 3201 E 9 Common Terminal 10 V A Q Terminal 11 OUTPUT Terminal 12 Case 13 Rubber Leg 14 Bottom Case Fixing Screw 15 Measuring Probe x1 x100 x10 k Resistan
14. e polarity select switch to the Set the measuring range select switch to a desired position on 3 4 AC Voltage Measurement AC V Connect the red lead to the V A Q terminal and the black lead to the terminal DC AC Q position the AC V range Then read out the indication on the AC scale This voltmeter of the tester is a rectifier type meter in which germanium diodes are incorporated with the moving coil type meter and the scale is calibrated in term of RMS value of pure sine wave alternating current For this reason note that application of nonsinusoidal AC will cause errors in indication When it is desired to measure a voltage of high frequency connect the com terminal to the ground side of the measuring circuit This arrangement prevents indication errors caused by the stray capacitance between the tester and the ground Refer to Fig 3 1 Frequency Characteristics in which an example of the frequency characteristics is shown When measuring AC voltage in the circuit where a DC component is included connect the leads respectively to the OUTPUT terminal and terminal For further procedures follow instructions described in the paragraph AC Voltage Measurement To the OUTPUT terminal a 0 2 pF capacitor 400 W V is internally provided in series so that the DC component is impeded and only the AC voltage is indicated In case of low frequency voltage drop acr
15. ent should be conducted only by our service engineers IM 3201 E ll To avoid the risk of injury to personnel including electrical shock or damage to the instrument carefully observe and follow the instructions listed below A O Measurement Do not apply a voltage or current over the allowable limits between the termi nals Do not apply a voltage to the measuring terminals when measuring DC cur rents DC mA O Power source of measured objects A voltage may be applied to metals or wires that are connected to electrical equipments Connect the measuring terminals after confirming that a voltage has not been applied and the same applied to the grounding systems O Battery If the instrument is not used for a long period store it with the battery removed Otherwise any leakage from the battery may damage the instrument Ax CAUTION To avoid deterioration or damage to the circuit components keep out of direct sunlight and do not use or store the instrument in locations subject to high temperature and high humidity including inside vehicles Both sides of the front cover of the tester have been treated with antistatic coating Use of a wet cloth for wiping the cover shall be avoided since it degrades the coating Wipe softly with a dry sheet if the cover gets dirty Use of volatile solutions such as thinner benzine or other chemicals shall also be avoided The case and the tester cover are made of thermoplastic res
16. happens there is a possibility of electrical shock especially when a high voltage is measured IM 3201 E 3 2 DC Current Measurement DC mA AA CAUTION Set the polarity select switch to the Set the measuring range select switch to a desired position on There is a risk of damaging the instrument If a voltage is erroneously applied while the range is in DC mA the shunt resistor of the tester will be burned out Connect the red lead to the V A Q terminal and the black lead to the COM terminal DC AC Q position the DC mA range Check polarity and connect the tip end of the lead probes in series to the circuit to be measured Then read out the indication on the DC scale If the pointer deflects inversely change over the polarity select switch to the DC side Thus current can be measured without changing the lead connections 3 3 DC Voltage Measurement 1 Leads connections and the polarity select switch positioning are the same as in the case of the DC current measurement described above Set the measuring range select switch to a desired position on the DC V range Check polarity and connect the tip end of the lead probes in parallel to the circuit to be measured Then read out the indication on the DC scale If the pointer deflects inversely change over the polarity select switch to the DC side IM 3201 E Set th
17. in Keep the instrument away from any high temperature heat source e g a soldering iron IM 3201 E Notice Regarding This Instruction Manual 1 The contents of this instruction manual are subject to change without prior notice 2 All rights are reserved by Yokogawa No one is allowed to make copies of reprint any part or all the contents of this instruction manual without permission from Yo kogawa 3 If any questions arise or errors are found or if any information is missing out from this manual please inform us 4 Yokogawa is by no means liable for any damage resulting from the misuse of this product by the user Contents le ajo Pee iaa ee ee 1 2 Parnis EN aa 2 AP Ai 5 3 1 Instruction for Ui 5 3 2 DC Current Measurement DC mA sss 6 3 3 DC Voltage Measurement oooccccncccccccccnnononcoconnnonononnnnonanannannnnns 6 3 4 AC Voltage Measurement AC V ccccecsesseeeeeeeneesseeeneees 6 3 5 Measurement of Low Audio Frequency Output Level 8 3 6 Resistance MeaSureMent cccccecsesseeeseeeseeeseesseeseeeeeeseees 8 3 7 Checking Battery Amount and Battery Replacement 9 3 8 Circuit Diagram Parts US Ducado 10 4 Use of Accessories Additional Specifications 11 4 1 Model 320310 12 kV DC High Tension Probe 11 4 2 Model 320410 12 A DC ShUMt ooocnnnnccnnnnnccnncncnnnnccnncnnnnanconnos 12 4 3 Model 320510 C
18. ipment must be disconnected For the measurement of a circuit which includes capacitors the charged electricity must be discharged from the capacitor Note that the external voltage may burn the resistors of the tester IM 3201 E Connect the two measuring lead probes respectively to the Set the polarity select switch to the Set the measuring range select switch to a desired position on V A Q and coM terminals DC AC Q position the Q range Short the tip ends of the two measuring probes of the leads Turn the zero ohm adjust knob QADJ and set the pointer to zero of the OHM scale Note This zero adjustment must be repeated each time when the measuring range is changed over to another Connect the tip ends of the measuring probes respectively to the points across which the resistance is to be measured Take the reading on the OHM scale and multiply the value read by the multiplying factor of the applying measuring range Thus the resistance value is obtained 5 Current for each measuring range is as follows at zero position of resistance scale x 1 Q range approximately 150 mA x 100 Q range approximately 1 5 mA x 10 kQ range approximately 15 pA For checking quality of capacitors use the x 10 kQ range A good capacitor is charged by the battery voltage of the tester to cause a deflection of the pointer The pointer is then returned gradually
19. lip On Current Transformer Order Discontinued ltemM oooccccccccococcnnccnnonanconcnnnonanos 12 5 Mainlenances u 13 A A 13 5 2 Fuse Replacemeni u ie 13 Bo oe 14 5 1 SPecilCaloONS nuse tiesa 14 6 2 Accessory SpecifICations eec tenant sodann 15 IM 3201 E IM 3201 E Y 1 Introduction The Model 320110 is a handy and widely usable circuit tester designed with high reliability for the measurements of DC AC currents DC AC voltages DC resistances etc Through these measurements a variety of electronic and electrical equipment are readily adjusted tested or maintained lt Features gt 1 Employment of taut band suspension for the tester permits high sensitivity reproducibility of indications and long duration yet its mechanism is rugged against vibration or shock and has no friction 2 The tester features high input impedance The internal resistance of the voltage circuit is as high as 100 kQ V at DC or 10 kQ V at AC which is higher than that of any other conventional circuit testers as a tester without amplifier lt can also be used as an electronic voltmeter 3 Results of the measurement with 320110 are highly accurate with 2 for DC or 3 for AC The scale has a built in mirror 105 millimeter in scale length to eliminate parallax in reading 4 A solid state overcurrent protective circuit is provided with the tester so as not to burn
20. oss the capacitor causes an error in indication This error depends upon the measuring range Refer to Fig 3 2 Frequency Characteristics when OUTPUT Terminal is Used CHI 120V Range _ 30V Range HR TA Eee Eo 0 2 20 50 100 Ban T Fig 3 1 Frequency Characteristics Frequency Hz 20 W 100 200 500 1000 Resina Eme er I REIN ALL DET 3V Range e x Error Fig 3 2 Frequency Characteristics when OUTPUT Terminal is Used IM 3201 E 3 5 Measurement of Low Audio Frequency Output Level 1 The output level denotes the voltage in the audio frequency range being applied to a specific load impedance This output voltage is expressed in dB This instrument is calibrated for a O dB reference level when 1 mW of power is developed in a 600 2 load 0 775 AC V into 600 2 Measuring procedures are as described in the paragraph AC Voltage Measurement The indication is read out on the dB scale The dB values on the scale are the ones when the measure range select switch is set to the AC 3 V range Add dB value read from value indicated on dB chart shown below right on the scale panel 0 dB 1 mW 600 Q AC V RANGE 3 12 30 120 0 12 20 32 ADD dB 3 6 Resistance Measurement A CAUTION There is a risk of electrification or damaging the instrument Prior to measuring the resistance in the circuit of equipment the power source to the equ
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