Sanwa SP20 Manual

Sanwa Multimeter SP20

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Side 1/1

Dempa Bldg., 4-4 Sotokanda 2-Chome

Chiyoda-Ku, Tokyo, Japan

INSTRUCTION MANUAL

SP20

MULTITESTER

START

Main unit and test

leads damaged?

Check continu ity of

test leads and fuse.

S t o p u s i n g i t a n d

have it repaired.

No damaged

Damaged

Yes

①

Set the range selector

knob at Ω ranges.

②

Short the red and

black test pins.

No p r o b l e m . S t a r t

mea surement.

Pointor swing at right?

Replace the battery

and fuse. and starting

to ① once more.

Meter cover

Panel

Pointer

Scale

＋input terminal

Range selector

Zero position

adjuster

－input terminal

0 Ω・

adjuster

Test lead (Red)

Test pin

Plug

Test lead (Black)

Test lead (TL-61)

Battery

Resistance

Battery

Battery lid

Screw

Fuse

（○）（×）

Power

Load

Power

Load

【1】



SAFETY PRECAUTIONS : Before use, read the following safety precautions

This instruction manual explains how to use your multitester

SP20 safely. 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 “ ” “WARNING 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.

: 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.

: Voltage 

: Glaund

: AC Voltage ＋

: Plus input

Ω : Resistance − : Minus input

: Fuse & Diode protection : Fuse

: Drop proof

1-2 Warning Instruction for safe use

To ensure that the meter is used safely, be sure to observe

the instruction when using the instrument.

1. Never use meter on the electric circuit that exceed 3 kVA.

2. Pay special attention when measuring the voltage of AC 33

Vrms (46.7 Vpeak) or DC 70 V or more to avoid injury.

3. Never apply an input signals exceeding the maximum rating

input value.

4. Never use meter for measuring the line connected with

equipment (i.e. motors) that generates induced or surge

voltage since it may exceed the maximum allowable voltage.

WARNING

5. Never use meter if the meter or test leads are damaged or

broken.

6. Never use uncased meter.

7. 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.

8. 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. Never use meter with wet hands or in a damp environment.

11. Never open tester case except when replacing batteries or

fuse. Do not attempt any alteration of original specifications.

12. To ensure safety and maintain accuracy, calibrate and check

the tester at least once a year.

13. Indoor use.

1-3 Maximum Overload Protection Input

Function (Range)

Input

Maximum rating

input value

Maximum overload

protection input

DCV 50 〜500

＋, −

Full scale value

at the ranges

DC 1000 V, AC 750 V or

PEAK MAX 1100 V

ACV 50 〜500

DCV 0.25〜10

✽

DC, AC 200 V or

PEAK MAX 250 V

ACV 10

DCA 2.5 m/25 m/0.25

✽

DC, AC 0.5 A

DCA 50 μ

✽

DC, AC 1 mA

Voltage and current

input prohibited

✽

DC, AC 200 V or

PEAK MAX 250 V

1.5

DC 2 V

Note: AC voltage is regulated by rms value of sinusoidal wave.

“✽” is within 5 second.

【2】

APPLICATION AND FEATURES

2-1 Application

This instr u me nt is por t able mu ltime t er desig nate d fo r

measurement of weak current circuit.

2-2 Features

∙ Taut-band structure is adopted in the meter part.

∙ A stand is equipped.

【3】

NAME OF COMPONENT UNITS 【4】

MEASUREMENT PROCEDURE

4-1 Start-up Inspection

4-2 How to Set up Range (Selection of appropriate range)

①When determining a measuring range, select a higher voltage

than the value to be measured as well as where the pointer of

a meter moves to a considerable extent. However, select the

maximum range and measure in case the extent of value to be

measured can not be predicted.

②Appropriate range for measuring a resistance (Ω) , select the

range that the pointer indicates approximately in the center.

4-3 Preparation for Measurement

Turn the zero position adjuster so that the pointer may align left

to zero position. Select a range proper for the item to be measured

and set the range selector accordingly.

4-4 Voltage Measurement

4-4-1

DCV Measurement ( ) Maximum rating input value500 VDC

1) Applications

Measures batteries and d. c. circuits.

2) Measuring ranges

0.25/2.5/5/10/50/100 (6ranges)

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.

WARNING

1. Never apply an input signals exceeding the maximum rating

input value.

2. Be sure to disconnect the test pins from the circuit when

changing the function.

3. Select the maximum range and measure in case the extent of

value to be measured can not be predicted.

4. Always keep your fingers behind the finger guards on the

probe when making measurements.

WARNING

Battery

4-4-2

ACV Measurement ( 〜) Maximum rating input value500 VAC

① Connect the black plug of the test lead to the −input terminal and

the red plug to the

＋input terminal.

② Set the range selector knob to an appropriate ACV range.

③ Apply the red and black test pin to measured circuit.

④ Read the move of the pointer by V. A scale.

⑤ After measurement, remove the red and black test pins from the

circuit measured.

• Since this instrument adopts the mean value system for its AC

voltage measurement circuit, AC waveform other than sine wave

may cause error.

• Errors occur under such frequencies other than specified

specification.

4-5

DCA Measurement ( ) Maximum rating input value0.25 ADC

① Connect the black plug of the test lead to the −input terminal and

the red plug to the ＋input terminal.

②

Set the range selector knob to an appropriate DCA range.

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 move of the pointer by V. A scale.

⑤

After measurement, remove the red and black test pins from the

circuit measured.

4-6 Resistance Measurement (Ω)

① Connect the black plug of the test lead to the −input terminal and

the red plug to the ＋input terminal.

② Set the range selector knob to an appropriate Ω range.

③ Short the red and black test pins and turn the 0 Ω adjuster so

that the pointer may align exactly to 0 Ω.

④ Apply the black and red test pin to the measured resistance.

⑤ Read the move of the pointer by Ω scale.

⑥ After measurement, remove the red and black test pins from the

resistor measured.

Note : Be sure to use the same rated fuse. In case a fuse other than the

same rated one (see "SPECIFICATIONS") is used, error in

indication occurs and/or circuit protection is made unable.

Caution : If the pointer fails to

swing up to 0 Ω

even when the 0 Ω

adjuster is turned

clockwise fully,

replace the internal

battery with a fresh

one.

4-7 Battery check

① Connect the black plug of the test lead to the −input terminal and

the red plug to the

＋input terminal.

②

Set the range selector knob to an appropriate

1.5V

range.

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 move of the pointer by

1.5V

4-8 Measuring Capacity (μF)

① Connect the black plug of the test lead to the −input terminal and

the red plug to the

＋input terminal.

② Set the range selector knob to an appropriate μF×1 range.

③ Short the red and black test pins and turn the 0 Ω adjuster so

that the pointer may align exactly to 0 Ω.

④

Apply the black and red test pin to the measured capacitor.

⑤

The pointer moves full scale by the charge current to the capacitor.

However, the point starts gradual returning from a certain point.

Read the indicated maximum value on μF scale.

4-9 DC High Voltage measurement (Optional HV Probe)

① Connect the black plug of the HV probe to the −input terminal and

the red plug to the ＋input terminal.

② Set the range selector knob to HV PROBE range.

③ First, connect the clip (black) of the probe to the earth line (−) in

the circuit to be measured, and then apply the measuring pin on

the probe body to your measuring point.

④ Read the move of the pointer by V. A scale, measured value in

terms of kV.

4-10 Optional Temperature Probe (T-THP) Max value +200 ℃

① Connect the pin of the temperature probe to the

＋input terminal

and the black plug to the −terminal.

② Set the range selector to

℃ PROBE range.

③ Adjust the pointer to the 0 Ω by the range selector. Remove

the pin of the temperature probe from the ＋terminal and then

connect the red plug.

④ Connect the measuring pin to a point to be measured. Read the

value on ℃ scale when the pointer is stabilized.

4-11 End of Measurement

Turn off the range to prevent voltage applied to resistance and

current ranges.

【5】

MAINTENANCE

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.

WARNING

Never apply voltage to the input terminals.

WARNING

Never apply an input signals exceeding the battery voltage

to the input terminals.

The probe is designed for the measurement of very small direct

current circuit. Never use the probe to measure high voltage in

power lines, such as transmission and distribution lines ; it is

very dangerous.

WARNING

1. Never apply voltage to the input terminals.

2. Do not measure as for a condenser of a

charged condition.

1. This section is very important for safety. Read and understand

the following instruction fully and maintain your instrument

properly.

2. The instrument must be calibrated and

inspected at least once a

year to maintain the safety and accuracy.

1. If the rear case or the battery lid is removed with input applied to

the input terminals, you may get electrical shock. Before starting

the work, always make sure that no input 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 battery lid, do

not touch the internal

parts or wire with hand.

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 instument, avoid hot, cold or humid places or

places under direct sunlight or where condensation is anticipated.

WARNING

CAUTION

5-1 Maintenance and Inspection

1. Appearance

• Is the appearance not damaged by falling?

2. Test leads and fuse

• Is 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.

5-2 Calibration

The calibration and inspection may be conducted by the dealer.

For more information, please contact the dealer.

5-3 How to Replace Battery and Fuse

① Remove the battery lid screw with a screwdriver.

② Remove the battery lid.

③ Take out the battery and replace it with a new one.

④ Attach the battery lid and fix it with the screw.

① Remove the battery lid screw with a screwdriver.

② Pull out the fuse out of holder on the circuit board and replace it.

③ Put back the battery lid where it was and tighten the screw.

④ Check and see whether or not indications of respective ranges are

normal.

●

Please use spare fuse of a battery lid back side.

5-4 Storage

Following the above instructions, store the instrument in good

environment.

【6】

AFTER-SALE SERVICE

6-1 Repair

If the multimeter fails during use, check the following items before

sending it for repair.

• Is the battery not exhausted?

• Are the test leads not disconnected?

• Is the fuse not blown?

We repair defective product at any cost. When mailing it to us for repair,

do not use the same cardboard box in which it was delivered to you

because it may receive damage in trasit. Please send it in a box at least

five times as large as the original box with enough cushioning material

stuffed around it.

6-2 For Information or Enquiries

If you need information regarding purchase of repair parts or if you

have any other sales related questions, please contact the dealer, selling

agent, or maker.

【7】

SPECIFICATIONS

7-1 General Speciﬁcations

AC Rectifier Form

: Half-wave rectifier form

Meter type : Internal magnet type, Taut band meter

Accuracy Assurance Temperature/Humidity Range

: 21 〜25

℃

75 %RH max. No condensation

Operating Temperature/Humidity Range

: 3 〜43

℃

80 %RH max. No condensation

Storage temperature/Humidity Range

: −10 〜50 ℃ 70 %RH max. No condensation

Internal Battery : R6 (IEC) or UM-3 1.5 V×2

internal fuse : φ 6.3×30 mm 0.5 A/250 V Fast fuse

Blowout capacity 500 A

Dimension and Mass

: 144(

)×99(

)×41(

)mm・approx. 270 g

Accessories : Instruction manual 1 Spare fuse 1

Test leads (TL-61)1

7-2 Optional Accessories

• Clip adapter CL-14 (Red, Black 1 set)

• HV probe HV-10

• Carrying Case C-SP

• Carrying Case C-SPH

• Clip adapter TL-9IC

7-3 Measurement Range and Accuracy

Accuracyassurance range : 23

℃±2 ℃ 45 〜75 %RH max.

　 

No condensation

Attitude : Horizontal (± 5 °)

ACV accuracy in the case of sine wave AC.

Function Accuracy Remarksfull scale value

DCV

( )

0.25/2.5/5/10/50/100 ±3 % against

full scale

Input impedance 20 kΩ/V

500

input impedance 9 kΩ/V

ACV

(〜)10/50/250/500 ±3 % against

full scale

Input impedance 9 kΩ/V

Frecquency

:40 Hz 〜100 kHz

(AC 10 V range ±3 %)

DCA

( ) 50 μ/2.5 m/25 m/0.25 ±3 % against

full scale

Voltage drop 0.25 V

Not including the

resistance of the fuse

Ω2 k/20 k/ 200 k/ 2 M

(×1)(×10)(×100)(×1 k) ±3 % of arc

Center value 20 Ω

Max. Value 2 kΩ

Release voltage 3 V

Battery

Check 2.0 V ―――

Load resistance 20 Ω

Capacity

(μF) 500 ―――

Pointer indication of

the maximum move

by charged current in

the capacitor.

HV DC 25 kV ±20 % with

probe Optional HV-10

Temp

℃

−20 〜＋ 200 ±3 % against

full scale Optional THP

Specifications and external appearance of the product described

above may be revised for modification without prior notice.

Fuse of the specified rating and type

0.5 A/250 V φ 6.3×30 mm Blowout capacity:500 A

Produkt Specifikationer

Mærke:	Sanwa
Kategori:	Multimeter
Model:	SP20

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