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Maintenance and inspection ………………………………042 Calibration ……………………………………………………042 ………………………043 How to Replace Battery and Fuse Cleaning and Storage ………………………………………044 【7】SPECIFICATIONS Measurement Range and Accuracy ………………………045 General Specifications………………………………………046 Optional accessories General Specifications ……………047 【8】After-Sales Service Warranty and Provision ……………………………………047 Repair …………………………………………………………048 SANWA web site ……………………………………………048...
ます。 DC 20 A → 0.1 倍 AC 20 A → 100 倍 DC 200 A → 1 倍 AC 200 A → 1000 倍 ⑧測定後は電流プローブの鉄心を開き、被測定導体から電流 プローブをはずします。 ⑨本器 (CD731a) とプローブ (CL-22AD) のスイッチをOFFに戻 します。 ⑦ ③ ⑥⑧ ④ ② ⑤ ⑨...
【1】 SAFETY PRECAUTIONS : Before use, read the following safety precautions This instruction manual explains how to use your multimeter CD731a safely. Before use, please read this manual thoroughly. After reading it, keep it together with the product for reference to it when necessary.
05. Never use meter if the meter or test leads are damaged or broken. 06. Never use uncased meter. 07. Be sure to use a fuse of the specified rating or type. Never use a substitute of the fuse or never make a short circuit of the fuse. 08.
【2】APPLICATION AND FEATURES 2-1 Application This instrument is portable multimeter designated for measurement of weak current circuit. 2-2 Features ・4000 counts disply. ・Auto power save 30 min. ・With the capacity measurement function. ・The current function is the semi auto ranges. ・Main unit case and the circuit board is made of fire retarding materials.
3-2 Multimeter, Test leads Holster Test lead Display Data hold Range hold switch switch Select Power switch switch and function Stand switch Safety cover 4・20 A input terminal COM − input terminal Ω,● , ●, ●,μA, mA + input terminal Removable test pin covers When not covered:CAT.
【4】Description of Functions 4-1 Switch and description ○Power switch and function switch Turn this switch to turn on and off the power and to select the , μA, mA, A. functions of V, /● /●,● ○Range hold switch Pressing this switch once sets the manual mode and the range is fixed.
○Auto power off, Auto powersave This device incorporates auto-power-off function that turns off the display in about 30 minutes to save battery draining. There is a little battery draining even if the auto power save function is activated, therefore be sure to return the Power/Function knob to OFF after measurement.
【5】MEASUREMENT PROCEDURE 5-1 Start-up Inspection WARNING 1. Never use meter if the meter or test leads are damaged or broken. 2. Make sure that the test leads are not cut or otherwise damaged. ④ ③ ① ② 〔Fig 4〕 − 33 −...
●In the AC4 V range, a figure of about 3~9 counts will stay on even if no input signal is present. But it is not malfunction. ●In the manual mode of the ACV function, the CD731a can be set to the 400 mV range and shows an approximate value. But its accuracy is not guaranteed.
5-3 Resistance Measurement ( ) WARNING Never apply voltage to the input terminals. 1) Application Resistance of resistors and circuits are measured. 2) Measuring ranges ∼40 M (6 ranges) 3) Measurement procedure (See Fig 7, page 10) ①Connect the black plug of the test lead to the COM − input terminal and the red plug to the +...
③Select the select switch at " ". ④Apply the black test pin to the cathode of the diode and the red test pin to the anode. ⑤Make sure that the display shows a diode forward voltage drop. ⑥Replace the red and black test pins, make sure that the display is the same as that when the test leads are released.
It is therefore recommended that an object to measure (capacitor) be directly connected between the (+) and (−) measuring terminals of the CD731a. ●As the capacitance increases, the measuring time becomes longer. Example: 2 to 4 seconds at 10 μF 5 to 8 seconds at 50 μF...
5-7 Current Measurement (μA, mA, A) WARNING 1. Never apply voltage to the input terminals. 2. Be sure to make a series connection via load. (please see to above drawing) 3. Do not apply an input exceeding the maximum rated current to the input terminals.
DCA: 4・20 A (2 ranges), ACA: 4・20 A (2 ranges) 3) Measurement procedure (See Fig 13, page 16) ①Slide the safety cover of the CD731a to the left and insert the red plug of the test leads to the 4・20 A measuring terminal and the black plug to the COM (−) terminal.
⑤Select either 20 A or 200 A with selector knob of clamp probe. probe to make the display of the CD731a show "000.0". ⑥Open the clamp part, have electric wire (one line) clamped. − 40 −...
⑦Read the value on the display as follows. DC 20 A : multiplying by 0.1 AC 20 A : multiplying by 100 DC 200 A : multiplying by 1 AC 200 A : multiplying by 1000 ⑧After measurement, open the clamp part and release clamp probe from the electric wire.
1) Measurement item Anode voltage of cathode ray tube, high focusing voltage, and voltage of high-impedance circuit 2) Measurement range : DC1000 V range (Set manually in the manual mode) 3) Measuring method ①Insert the red plug of the high-voltage probe into the V input terminal and the black plug into the COM terminal.
6-3 How to Replace Battery and Fuse (See Fig 18, page 22) WARNING 1. If the rear case is removed with input applied to the input terminals, you may get electrical shock. Before starting the work, always make ure that no inputs is applied. 2.
6-4 Cleaning and 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).
【7】SPECIFICATIONS 7-1 Measurement Range and Accuracy Accuracy assurance range : 23±5 ˚C 80 %RH MAX. No condensaition. Input Resistance Remarks Function ≧100 M ±(0.5 %rdg+2 dgt) 400.0 mV 4.000 V Approx. 11 M ±(0.9 %rdg+2 dgt) 40.00 V Approx. 10 M 400.0 V ±(1.0 %rdg+2 dgt) 1000 V...
7-2 General Specifications Measuring Method : △Σmethod Display : 4000 counts Range selection : Auto and manual ranges Over display : "O.L" is displayed (except DC/AC 20 A, DC 1000 V, AC 750 V ranges) Polarity : Automatic selection (only "−" is displayed) Battery discharge display : If the internal battery has been consumed and the voltage drops, the display shows.
・Corrent probe CL-20D, CL-22AD, CL33DC・Carrying case C-SP 【8】After-Sales Service 8-1 Warranty and Provision Sanwa offers comprehensive warranty services to its end-users and to its product resellers. Under Sanwa's general warranty policy, each instrument is warranted to be free from defects in workmanship or material under normal use for the period of one (1) year from the date of purchase.
3) 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.
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