CD721 - Sanwa Electric Instrument Co., Ltd.
Contents
1. This warranty is valid only within Japan OF OM OO 1 SAFETY PRECAUTIONS Before use read the following safety precautions This instruction manual explains how to use your multimeter CD721 sately Before use please read this manual thoroughly After reading it keep it together with the product for reference to it when necessary The instruction given under the heading ZAWARNING A CAUTION must be followed to prevent accidental burn or electrical shock 1 1 Explanation of Warning Symbols The meaning of the symbols used in this manual and attached to the product is as follows AN Very important instruction for safe use The warning messages are intended to prevent accidents to operating personnel such as burn and electrical shock The caution messages are intended to prevent damage to the instrument DC Q Resistance gt Diode Buzzer AC Glaund2. lt gt gt gt lt gt 5 2X20mm 0 5A 250V 42 40 2 120 10 FO0301 300A 6 3X32mm 12A 250V 200 190 10 120 10 FOO23 500A 7 3 TEL 03 3253 4871 FAX 03 3251 7022 8 8 1 Byr RIX N I ot FS TK Gt HS SF E TEL 06 6631 7361 FAX 06 6644 3249 BE 0120 51 3930 9 30 12 00 13 00 17 00 http www sanwa meter co jp WN S dK XS WHS RERE FESS gt HA J Z SHE vx y ene at ty iq Bll RRRS AEE
3. 1 3V COM 5 1 2 COM 9 gt F 3200 1 3V 200 Extension cord 5 5 A
4. 2 3 A 8 7 7 1 3 1 7 2 1
5. DC 0 epi ZAC O O Ehia E edee Tora ikta 1 2 Il Oe e ne 1 6kVA 2 AC30Vrms 42 4Vpeak DC60V 3 4 5 6 7 8
6. me fe A 1 2 ML COM 9 3V Anode Cathode 5 6 1 5V 1 1 R20 2 R14 3 R6
7. 2 1 1 6 1 1 2 51 6 2 6 3 amp 1 2 3 e am lt
8. 8 2 3200 32 OL 2 12 23 5C 80 RH 0 40 80 RH 10 50C 70 RH 2000m 3 R6 2 1 8mW TYP DCV 10 5 2X20mm 0 5A 250V 300A 6 3X30mm 12A 250V 500A gt 165 5 H X78 W X41 5 D mm 290g 1 L 21 1 70 IEC 1010 MRE FZ EN 61010 1 DC1000V AC750V gt EN50082 1 EN55022 EN50082 1 EN61000 4 2 EN50082 1 EN61000 4 3 EN50082 ENV50204
9. an i 7 UL a SR ee COM STROH OTT H PEVW ETD 3 Fig 3 5 2 V DC1000V AC750V lt A 1 2 3 1 DCV ACV 4 2 DCV 320mV 1000V 5 ACV 3 2V 750V 4 COM
10. 9 10 11 12 ee 13 14 1 15 1 3 12A 12A 12A IV 0 e gt mA 1 4 DC1000V DC1000V AC750V AC750V PEAK MAX 1000V AEE DC AC500V PEAK MAX 700V 0 5A 250V 0 5A 250V 12A DC AC12A ee DC AC 12A BORGER me
11. R H DH ID H D H 10 D HI OFF Fig 2 3 5 5 1 gt ie 1 2
12. 2 3 0 6 4 5 205 8604 4 7 15 TEL 042 554 0113 FAX 042 555 9046 5
13. DCV ACV ACV Fig 4 DCV Fig 5 ACV 5 3 Bin 9 30MO 1 2 3 3200 30M 6 0 COM 0Q
14. CL 22AD DC AC200A DCV ACV DCV 320mV ACV 3 2V COM V A DC20A 0 1 AC20A 100 DC200A 1 AC200A 1000 5 8 4 CL 33DC DC300A DCV 320mV COM V Ze 0 5 0 1 300A 1 A 6 A 1 Fo
15. gt OP 9 3 R6 ee 12A 250V Fig 13 gt 0 5A 250V 245 2X20mm 300A 12A 250V 46 3X30mm 500A 6 4 A it 1
16. BT mn I P 4 ON OFF V Q A H E5 mA 12A SHIFT 1 A A 1 F R H mA lt
17. HV 60 DC30kV A DCV 1000V COM V 0 1 kV 5 8 2 CL 20D AC200A ACV 3 2V COM V 20A 100 200A 1000 A 5 8 3
18. DC AC 3 mA COM mA DC AC 8 mA 32mA 320mA DC AC12A 1 2 30 3
19. LR20 LR14 LR6 300 2 1 5V 3 5vh COM YE 7 5 7 A AB amp 1 2 3 5 7 1 DC ACm A DC AC320mA 1 2 32mA 320mA 2
20. 2 2 1 amp AU 2 2 IEC1010 3200 10 mA 3 OO 3 1 FN aka ees eae BRAC FR Sane 12A PEE TEIN Rt Fig 1 Ve Q s 15Vh mA 2 3 2 Os Gy ae my lt i PELL V K a a wr m lt IR i aN ELI LILI ae ot an o A
21. CL11 HV 60 C SP CL20D CL22AD CL33DC 8 3 HEHA h EOE 2345C 80 RH MOROZE DCA 320 0mV 12 00A 32 00mA 320 0mA We E 0 5 rdg 2dgt 0 9 rdg 2dgt x 1 2 rdg 5dgt 1 2 rdg 2dgt 2 0 rdg 2degt 1 8 rdg 5det 100MQO 411M 0 10MQ 11M Q 10M Q 1 AC 40 400Hz 3V 32 00mA S 3200mA 1 4 rdg 2dgt 50 0 0050 AC 40 400Hz ACA OA 25 rdg 5dgt 200 ia 1 3V 3V PRE 300 rdg reading det digits DCmV 100
22. CD721 DIGITAL MULTIMETER INSTRUCTION MANUAL 2 4 4 101 0021 03 3253 4871 2 7 2 556 0003 06 6631 7361 SANWA ELECTRIC INSTRUMENT CO LTD Dempa Bldg 4 4 Sotokanda2 Chome Chiyoda Ku Tokyo Japan 1 CD721 ea ee ANE 1 1 A
23. agent distributor without those information will be returned to the customer NOoRWN gt Note 1 Prior to requesting repair please check the following Capacity of the built in battery polarity of installation and disconti nuity of the test leads Repair during the warranty period The failed meter will be repaired in accordance with the condi tions stipulated in 7 1 Warranty and Provision Repair after the warranty period has expired In some cases repair and transportation cost may become higher than the price of the product Please contact Sanwa authorized agent service provider in advance The minimum retention period of service functional parts is 6 years after the discontinuation of manufacture This retention period is the repair warranty period Please note however if such functional parts become unavailable for reasons of discontinua tion of manufacture etc the retention period may become short er accordingly Precautions when sending the product to be repaired To ensure the safety of the product during transportation place the product in a box that is larger than the product 5 times or more in volume and fill cushion materials fully and then clearly mark Repair Product Enclosed on the box surface The cost of sending and returning the product shall be borne by the customer Ue 2 7 3 SANWA Website http www sanwa meter co jp E mail exp_sales sanwa meter co p 8 SPECIFICATIONS 8 1 Ge
24. 3 4 1 12A 2 12A 1 DC AC 3 12A COM 12A DC AC Oe iii AC 40Hz 400Hz 12A 9 5A Fig 12 5 8 1
25. Appliances Portable Equipment Installation category Overvoltage category Il Distribution level Fixed Installation 8 2 Optional Accessories Current prode CL 22AD CL 20D CL33DC High voltage probe HV 60 Soft case C SP 8 3 Measurement Range and Accuracy Accuracy assurance range 23 5C 80 RH MAX No condensaition Range Accuracy Input Resistance 320 0mV 0 5 rdg 2dgt 100MQ Approx 11MQ DCV O 0 9 rdg 2dgt Approx 10M9 m E aS Accuracy in the ACV 1 2 rdg 5dgt case of sine wave Approx 10MQ ac 40 400Hz 3 200k Q O 0 pen voltage Approx 1 3V a 32 00kQ 7 1 2 rdg 2dgt The measurering current changes 320 0k according to the resistance mea 3 200MQ 2 0 rdg 2dgt SUE 30 00M 5 0 rdg 2dgt 32 00mA DCA 3200mA 1 4 rdg 2dgt Approx 50 ACA 12 00A 32 00mA A 50 Accuracy in the 320 0mA 1 8 rdg 5dgt Ph case of sine wave 2 5 rdg 5dgt Approx 0 005 AC 40 400Hz Buzzer sounds at approx 20Q Max Open voltage Approx 1 3V Open voltage Approx 3V BT Check Outline Value When 30Q Load 2 0 rdg 2dgt Approx 0 005Q rdg reading dgt digits Accuracy in the case of sine wave AC Do not use the tester near places where strong electromagnetic waves and trance are generated or strong electrical voltages are generated Specifcations and external appearance of the product described a
26. Set the function switch at 12A function and select either DC or AC with the shift switch Apply the black test pin to the negative potential side of the cir cuit to measure and the red test pin to the positive potential side 4 Read the value on the display After measurement remove the red and black test pins from the circuit measured if the display will not change when an input signal is applied measurement is not possible a probable cause is a blown fuse Since this instrument employs the means value system for its AC voltage measurement circuit AC waveform other than sine wave may Cause error 5 8 How to use optional products 5 8 1 HV Probe HV 60 Maximum measurement valus DC30kV A WARNING The probe is designed for the measurement of very small DC cir cuit Never use the probe to measure high voltage in power lines such as transmission and distribution lines it is very dangerous Measurement procedure DSet the function at DVC and set the 1000V range with the range hold switch Connect the HV probe of the black plug to the COM terminal and the red plug to the V terminal First Cconnect the black clip of the probe to the earth line in the circuit to be measured and then apply the measuring pin on the probe the measuring point 4 Read the value on the display in kV unit after multiplying indicat ed value by 0 1 5 8 2 AC Clamp Probe CL 20D Maximum measurement value AC200A
27. o Double insulation Plus Minus Fuse 1 2 Warning Instruction for safe use WARNING To ensure that the meter is used safely Be sure to observe the instruction when using the instrument Never use meter on the electric circuit that exceed 6k VA Pay special attention when measuring the voltage of AC 30Vrms 42 4 Vpeak or DC 60V or more to avoid injury Never apply an input signals exceeding the maximum rating input value Never use meter for measuring the line connected with equip ment i e motors that generates induced or surge voltage since it may exceed the maximum allowable voltage Never use meter if the meter or test leads are damaged or bro ken Never use uncased meter Be sure to use a fuse of the spesified rating or type Never use a substitute of the fuse or never make a short circuit of the fuse Always keep your fingers behind the finger guards on the probe when making measurements 9 Be sure to disconnect the test pins from the circuit when changing the function or range 10 Be sure to disconnect the test pins from the circuit when changing the function or range 11 Never use meter with wet hands or in a damp environment 12 Never open tester case except when replacing batteries or fuse Do not attempt any alteration of original specifications 13 Do not use the device near an item of strong electromagnetic generation or a charged item 1
28. Measurement procedure DSet the function at ACV and set the 3 2V range with the range hold switch Connect the current probe of the black plug to the COM termi nal and the red plug to the V terminal Open the clamp part have eiectric line one line clamped Read the value on the display in A unit and when current probe of the 20A range after multiplying indicated value by 10 and the 200A range after multiplying indicated value by 100 5 8 3 DC AC Clamp Probe CL 22AD Maximum measurement value DC AC200A DSet the function at DCV or ACV Set the range is 320mV with range hold switch at DC measurement Set the range is 3 2V with range hold switch at AC measurement Connect the current probe of the black plug to the COM termi nal and the red plug to the V terminal 3 Open the clamp part have electric wire one line clamped Read the value on the display as follows DC20A gt multiplying by 0 1 AC20A multiplying by 10 DC200A multiplying by 1 AC200A multiplying by 100 5 8 4 DC Clamp Probe CL33DC Maximum measurement value DC300A Measurement procedure DSet the function at DCV and set the 320mV range with the range hold switch Connect the current probe of the black plug to the COM termi nal and the red plug to the V terminal Open the clamp part have electric line one line clamped Read the value on the display in A unit and when current probe of the 30A range after multiplying indicated value by 0 1 and the 300A range a
29. No play display my Ty caw Minus polarity display for e n V numeral data a E TE m 0 Data hold display DH J J MkQ unit display J se OT ULL 2 Mng Hight speed bar graph AC measurement display Testing diode display Minus polarity display for bar graph data Decimal point Bar graph scale Fig 2 4 DESCRIPTION OF FUNCTIONS Power switch and function switch Turn this switch to turn on and off the power and select the functions of V Q L5 mA 12A Shift switch When this switch is pressed the modes change as follows In the case of mA A the mode change as gt gt In the case of the mode change as gt ORange hold switch Pressing this switch once sets the manual mode and the range is fixed Once the manual mode is set the range moves each time this switch is pressed Checking the unit on the display and the place of the decimal point select a desired range To return to the auto mode keep pressing this switch until on the display disappears Data hold switch When this switch is pressed the data display at that time continues DH lights on the display When the measuring input changes the display will not change When this switch is pressed again the hold status is canceled you can return to the measuring status DH on the display disppears Auto power off This equipment incorporates an auto power off which turns off th
30. 0V 4 ranges 3 Measurement procedure See fig4 5 paged Connect the test lead of the black plug to the COM input termi nal and the red plug to the V input terminal 2 Set the function switch at DCV or AVC function 3 Apply the black test pin to the negative potential side of the circuit to measure and the red test pin to the positive potential side 4 Read the value on the display After measurement remove the red and black test pins from the circuit measured Since this instrument employs the means value system for its AC voltage measurement circuit AC waveform other than sine wave may cause error 5 3 Resistance Measurement Q A WARNING Never apply voltage to the input terminals 1 Application Resistance of resistors and circuits are measured 2 Measuring ranges 3200 30MQ 6 range 3 Measurement procedure See fig6 page6 Connect the test lead of the black plug to the COM input termi nal and the red plug to the Q input terminal Set the function switch at Q function Apply the black and red test pin to measured circuit 4 Read the value on the display After measurement remove the red and black test pins from the circuit measured f measurement is likely to be influenced by noise shield the object to measure with negative potential test lead black if a test pin is touched by a finger during measurement measure ment will be influenced by the resistance in the human body to re
31. 0mV 320mV 0 5 rdg 2dgt 100 0 mV X0 5 2 dgt 0 7 mV K 100 0 mV 0 7 mV 99 3 100 7mV ee 06 07 sanla CD721 No 8 HLHLLLHUHL TEL 2 4 4 3 101 0021 03 32534871 1
32. 4 To ensure safety and maintain accuracy calibrate and check the tester at least once a year 15 Indoor use 1 3 Maximum Overload Protection Input l Maximum rating Maximum overload Function Input Input value protection Input DCV DC1000V DC1000V AC750V ACV AC750V or PEAK MAX 1000V or A Voltage and current DC AC500V O 9 or input prohibited or PEAK MAX 700V _ 0 5A 250V DC AC 0 5A 250V 12A DC AC 12A 12A 250V 2 APPLICATION AND FEATURES 2 1 Application This instrument is portable multimeter designated for measure maent of week current circuit 2 2 Features The instrument has been designed in accordance with the safety standard IEC 1010 1 3200 counts and circular bar graph avaliable Data hold and range hold has adhered The mA range is the auto range 32mA to 320mA Auto power off 10min Main unit case and the circuit board is made of fire retarding materi als 3 NAME OF COMPONENT UNITS 3 1 Multimeter Test leads Test leod fix Plug Data hold switch Range hold Shift switch switch Finger guards Power switch and function switch Test probe Red Test probe Black COM input terminal 12A input terminal with safety cap Test lead TL 21 V oD ia ma Fig 1 input terminal 3 2 Display DC mearsurement display Numeral data display i R hold displa Checking countinuity ange
33. bove may be revised for modification without prior notice
34. e display in about 10 minutes to save power Just before the auto power off is activated a warning sound Is issued If you want to continue to use the equipment press the DH switch If you will not use the equipment for long hours keep the function switch at OFF 5 MEASUREMENT PROCEDURE 5 1 Start up Inspection A WARNING 1 Never use meter if the meter or test leads are damaged or bro ken 2 Make sure that the test leads are not cut or otherwise damaged START Main unit and test leads damaged No damage Check continuity of test leads Connect the test lead of black plug to the COM terminal Connect the test lead of red plug to the terminal Set the function switch at Damaged Stop using it and have it repaired Short the red and black test pins Display shows No 00 0 1 0 Yes No problem Start measurement Fig 3 5 2 Voltage measurement Maximum rating input value 1000VDC or 750VAC value ing the function N WARNING 1 Never apply an input signals exceeding the maximum rating input 2 Be sure to disconnect the test pins from the circuit when chang 3 Always keep your fingers behind the finger guards on the probe when making measurements 1 Applications DCV Measures batteries and DC circuits ACV Measures sine wave AC voltage as lighting voltages 2 Measuring ranges DVC 320mV 1000V 5 ranges ACV 3 2 75
35. fter multiplying indicated value by 1 6 MAINTENANCE A WARNING 1 This section is very important for safety Read and understand the following Instruction fully and maintain your instrument prop erly 2 The instrument must be calibrated and inspected at least once a year to maintain the safety and accuracy 6 1 Maintenance and inspection 1 Appearance Is the appearance not damaged by falling 2 Testleads ls the cord of the test leads not damaged Is the core wire not exposed at any place of the test leads If your instrument falls in any of the above items do not use it and have it repaired or replace it with a new one Make sure that the test leads are not cut referring to the section 6 2 Calibration The calibration and inspection may be conducted by the dealer For more Information please contact the dealer 6 3 How to Replace Battery and Fuse A WARNING 1 If the rear case is removed with input applied to the input termi nals you may get electrical shock Before starting the work always make ure that no inputs is applied 2 Be sure to use the fuse is same rating so as to ensure safety and performance of tester 3 When operator remove the read case do not touch the internal parts or wire with hand How to replace the battery Remove the rear case screw with a screwdriver 2 Remove the rear case 3 Take out the battery and replace it with a new one Attach the rear case and fix it wi
36. he red plug to the mA input terminal Select either current function and select either DC or AC with the shift switch Apply the black test pin to the negative potential side of the cir cuit to measure and the red test pin to the positive potential side Read the value on the display After measurement remove the red and black test pins from the circuit measured if the display will not change when an input signal is applied measurement is not possible a probable cause is a blown fuse The current ranges of 32mA to 320mA of this equipment are the auto ranges The ranges can also be fixed using the range hold switch Since this instrument employs the means value system for its AC voltage measurement circuit AC waveform other than sine wave may cause error For the mA range no unit symbol will be indicated 5 7 2 Current Measurement Maximum rating input value DC AC 12A A WARNING 1 Never apply voltage to the input terminals 2 Finish measurement with in 30 seconds to prevent heat genera tion 3 Provide intervals 3 minutes or longer between measurements to prevent heat generation 4 Perform measurement with the leads kept straight to prevent overheat 1 Applications Current in DC and AC circuit is measured 2 Measuring ranges 12A 1 range 3 Measurement procedure See fig12 page10 Connect the testlead of the black plug to the COM input termi nal and the red plug to the 12A input terminal
37. neral Specifications Measuring Method Dual integration Display Counter approx 3200counts Bar graph 32 segments max Range Selection Auto and Manual ranges Over Display O L mark indication Polarity Automatic selection only is displayed Battery Discharge _ If the internal battery has been consumed Display and the voltage drops the display shows Sampling Rate Approx 2times sec numeral display Approx 12times sec bar graph Accuracy Assurance Temperature Humidity Range 23 5C 80 RH max No condensation Operating Temperature Humidity Range 0 40C 80 RH max No condensation Storage Temperature Humidity Range 10 50 C 70 RH max No condensation Environmental Condition Operating altitude lt 2000m Pollution degree I Power Supply ROG IEC dry battery 2 pieces Power Consumption Approx 1 8mW TPY at DCV Battery Life 10 min auto power off Fuse protection 0 5A 250V 5 2X 20mm Blowout capacity 300A 12A 250V 6 3X30mm Blowout capacity 500A Dimension and Weight 165 5 H X78 W X41 5 D mm approx 290g Accessories Instruction manual 1 Test lead TL 21 1 Holster H 70 Safety Designed to protection Class I requirement of IEC 1010 1 EN61010 1 Max DC AC600V overvoltage category Ill Max DC1000V AC750V overvoltage category I EMC EN50082 1 EN55022 EN50082 1 EN61000 4 2 EN50082 1 EN61000 4 3 EN50082 ENV50204 Installation category Overvoltage category Local level
38. same as that when the test leads are released MAfter measurement release the red and black test pins from the object measured Judgement When the items and are normal the diode is good The input terminals release voltage is about 3V 5 6 Battery check A WARNING Never apply an input signals exceeding the battery voltage approx 1 5V to the input terminals 1 Application Measured battery voltage 2 Measuring ranges 5VE 3 Measurement procedure See fig9 pages Connect the testlead of the black plug to the COM input termi nal and the red plug to the 5Vh input terminal 2 Set the function switch at function Apply the black test pin to the negative potential side of the bat tery to measure and the red test pin to the positive potential side Read the value on the display After measurement remove the red and black test pins from the battery 5 7 Current Measurement WARNING 1 Never apply voltage to the input terminals 2 Be sure to make a series connection via load Please See to Fig 10 3 Do not apply an input exceeding the maximum rated current to the input terminals Fig 10 5 7 1 DC AC mA Measurement Maximum rating input value DC AC 320mA 1 Applications Current in DC and Ac circuit is measured 2 Measuring ranges 32mA 320mA 2 range 3 Measurement procedure See fig11 page9 Connect the testlead of the black plug to the COM input termi nal and t
39. sult in measurement error The input terminals release voltage is about 1 3V 5 4 Checking Continuity A WARNING Never apply voltage to the input terminals 1 Application Checking the continuity of wiring and selecting wires 2 Measurement procedure See fig7 page6 Connect the test lead of the black plug to the COM input termi nal and the red plug to the input terminal Set the function switch at function Apply the red and black test pins to a circuit or conductor to measure The continuity can be judged by whether the buzzer sounds or not After measurement release the red and black test pinsfrom the object measured The buzzer sounds when the resistance in a circuit to measure is less than about 200 The input terminals release voltage is about 1 3V 5 5 Testing Diode p A WARNING Never apply voltage to the input terminals 1 Application The quality of diodes is tested 2 Measurement procedure See fig8 page 7 Connect the test lead of the black plug to the COM input termi nal and the red plug to the input terminal Set the function switch at gt function and push the shift switch Apply the black test pin to the cathode of the diode and the red test pin to the anode 4 Make sure that the display shows a diode forward voltage drop Apply the red test pin to the cathode of the diode and the black test pin to the anode Make sure that the display is the
40. ted to be free from defects in workmanship or material under normal use for the period of one 1 year from the date of pur chase This warranty policy is valid within the country of purchase only and applied only to the product purchased from Sanwa authorized agent or distributor Sanwa reserves the right to inspect all warranty claims to determine the extent to which the warranty policy shall apply This warranty shall not apply to fuses disposables batteries or any product or parts which have been subject to one of the following causes 1 A failure due to improper handling or use that deviates from the instruction manual 2 A failure due to inadequate repair or modification by people other than Sanwa service personnel 3 A failure due to causes not attributable to this product such as fire flood and other natural disaster 4 Non operation due to a discharged battery 5 A failure or damage due to transportation relocation or dropping after the purchase 7 2 Repair Customers are asked to provide the following information when requesting services Customer name address and contact information Description of problem Description of product configuration Model Number Product Serial Number Proof of Date of Purchase Where you purchased the product Please contact Sanwa authorized agent distributor service provider listed in our website in your country with above informa tion An instrument sent to Sanwa
41. th the screw lt How to replace the fuse gt Fuse of the Specified Rating and Type 0 5A 250V 45 2 X 20mm Blowout capacity 300A 12A 250V 46 3 30mm Blowout capacity 500A Remove the rear case screw with a screwdriver Remove the rear case Pull out the fuse out of holder on the circuit board and replace it Put back the rearcase where it was and tighten the screw Check and see whether or not indications of respective ranges are normal Battery R6 1 5VX2 There is a inside of rear case Screw 12A 250V Fuse 0 5A 250V Fuse Fig 13 6 4 Storage CAUTION 1 The panel and the case are not resistant to volatile solvent and must not be cleaned with thinner or alcohol For cleaning use dry soft cloth and wipe it lightly 2 The panel and the case are not resistant to heat Do not place the instrument near heat generating devices such as a soldering iron 3 Do not store the instrument in a place where it may be subjected to vibration or from where It may fall 4 For storing the instrument avoid hot cold or humid places or places under direct sunlight or where condensation is anticipat ed Following the above instructions store the instrument in good environ ment 7 AFTER SALES SERVICE 7 1 Warranty and Provision Sanwa offers comprehensive warranty services to its end users and to its product resellers Under Sanwa s general warranty policy each instru ment is warran
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