Sanwa SP-18D Manual Download Page 2

Measurement Range and Accuracy

Accuracy assurance range : 23±2ºC 75%RH max.

No condensation

Attitude

: Horizontal (±5º)

ACV accuracy in the case of sine wave AC.

Function

Full scale value

Accuracy

Remarks

DCV

CV

0.3

3-12-30-120-600

±3%
against
full scale

Input impedance 5k

Input impedance 20k

/V

ACV 

12-30-120-300-600

±3%
against
full scale

Input impedance 9k

/V

Freq. (within ±3% f.s.)
30 Hz-70kHz (12V range)
30 Hz-20kHz (30V range)

60µ-30m-0.3

±3%
against
full scale

DCA

CV

Voltage drop 0.3V
Not including the resist-
ance of the fuse

2k-20k-2M

(X1) (X10) (X1k)

200M

(X100k)

±3% of arc

±5% of arc

Center value 20

Max. value 2k

Release voltage 3V

Battery

load

voltage

2.0V

2.0V

Load resistance 20

Load resistance 60k

Capacity

(µF)

10-1000

Pointer indication of the
maximum move by
charged current in the
capacitor.

Factory-preinstalled built-in battery 
A battery for monitoring is preinstalled before shipping, therefore
it may run down sooner than the battery life specified in the
instruction manual.
The ”battery for monitoring” is a battery to inspect the functions
and specifications of the product.

Accessories

Instruction manual 1, Hand strap 1,
Spare fuse 1 (contained in the rear case)

General Specification

Items

Specification

Drop shock proof

Taut-band structure is adopted in the meter section.
The meter section is designed to withstand shock.

Cricuit protection

The circuit is proected by fuse even when voltage of up
to AC 250V is impressed on each range for 5 seconds.

Internal battery

Internal fuse

R6 (IEC) or UM-3  1.5V X 2

0.5A/250V  Ø5 X 20mm  Fast acting fuse

Accuracy assurance
Temperature/Humidity range

23±2ºC, 75%RH max. no condensation

Operating temperature
and humidity range

0 ~ 43ºC, 80%RH max. no condensation

Withstand voltage

Dimensions and weight

3kV AC (1min.) between input test pin and case

159.5 X 129 X 41.5 mm/ approx. 320g

Optional Accessories

Alligator clip CL-11     IC test clip TL-8IC

APPLICATION AND FEATURE

Application

This instrument is portable multitester designated for meas-
urement of weak current circuits.

Feature

• Our technology has made it possible to measure high

resistance (up to maximum 200M

) with low voltage.

• Band meter of drop shock type with high sensitivity has

been employed.

The specifications described in this manual are subject to
chage without notice.

Repair test leads

TL-61Tc

Thank you for purchasing a SANWA tester, Model SP-18D. You are

kindly requested to thoroughly read this manual before use for

safety. Especially, "SAFETY INFORMATION" and "MEASURING

PROCEDURE" are important. Keep this manual together with the

tester not to lose it.

SANWA ELECTRIC

INSTRUMENT CO.,LTD.

Dempa Bldg.,Sotokanda2-Chome

Chiyoda-Ku,Tokyo,Japan

SAFETY PRECAUTIONS

This instruction manual explains how to use your multitester SP-18D,
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.

Warning Instruction for Safe Use

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

instruction when using the instrument.
Please be careful that the protection circuit may be undermined by
unjustifiable usage that does not follow the guidelines in the instruc-
tion manual.

1

1. Never use the meter on the electric circuits that exceed 6kVA.

1

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

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

1

3. Never apply an input signals exceeding the maximum rating input

value.

1

4. Never use the 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.

1

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

1

6. Never use uncased meter.

1

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.

1

8. Always keep your fingers behind the finger guards on the probe

when making measurements.

1

9. Be sure to disconnect the test pins from the circuit when changing

the function or range.

10. Before starting measurement, make sure that the function and

range are properly set in accordance with the measurement.

11. Never use the meter with wet hands or in a damp environment.
12. Never open rear case except when replacing batteries or fuse. Do

not attempt any alteration of original specifications.

13. To ensure safety and maintain accuracy, calibrate and check the

tester at least once a year.

14. Indoor use.

WARNING

PRECAUTION

1 Avoid giving the tester any excessive shock or vibration by

loading it on the motorbike and the like.

2 Keep off dust and moisture from the tester.

3 Do not leave the tester for a long time in places of a high

temperatrue (higher than 55ºC) a high humidity (higher
than 80%), and dew condensation.

4 The meter cover is treated with antistatic coating. Do not

wipe it hard or clean it with volatile solvent. Use a soft
brush to remove dust.

MAXIMUM OVERLOAD PROTECTION INPUT

Function (Range)

Maximu rating

input value

DC1000V, AC750V
or PEAK MAX 1100V

*DC, AC200V

or PEAK MAX 250V

Maximum overload

protection input

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

”*” is within 5 second.

1.5V

DCV120

600

ACV120

600

DCV0.3

30

ACV12

30

DCA30m/0.3

DCA60µ

Full scale
value at
the ranges

Voltage and current
input prohibited

DC2V

Measuring DCV

1 Set the range selector knob to

an appropriate DCV range.

2 Apply the black test pin to the

minus potential of measured
circuit and the red test pin to
the plus potential.

3 Read the move of the pointer

by V and A scale.

MEASURING PROCEDURE

WARNING

Confirm the range to use before measurement.

Preparation for Measurement

1 Adjustment of meter zero position:

Turn the zero position adjuster so that the pointer may align
right to the zero position.

2 Range selection:

Select a range proper for the item to be measured set the
range selector knob accordingly.

When determining a measuring range, select such one for
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.

NOTE

Measuring ACV 

1 Turn the range selector knob to an appropriate ACV range.

2 Apply the test pin to the measured circuit.

3 Read the move of the pointer by V and A scale. (Use AC

12V scale for 12V range only.)

• Since this instrument employs

the means value system for its
AC voltage measurement circuit,
AC waveform other than sine
wave may cause error.

• There occurs error under such

frequencies other than specified
in the specification.

Measuring DCA

1 Turn the range selector knob to an appropriate DCA range.

2 Take out measured circuit and apply the black test pin to

the minus potential of meas-
ured circuit and the red test
pin to the plus potential.

3 Read the move of the pointer

by V and A scale. 

WARNING

Connect the meter in series with the load.

Cut off.

Measuring 

1 Turn the range selector knob to an appropriate 

range.

2 Short the red and black test pins and turn the 0

adjuster so

that the pointer may align exactly to 0

. (If the pointer fails

to swing up to 0

even when the 0

adjuster is turned

clockwise fully, replace the internal battery with a fresh one.)

3 Apply the test pin to measured

resistance.

4 Read the move of the pointer by

scale.

Note

: The polarity of + and - turns

reverse to that of the test pins
when measurement is done in

range.

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.

Note

: Operating voltage of 

range for this tester is 3V and,

accordingly, operator can make lighting test of LED.
X10 range is optimum for the test.

WARNING

Do not measure a resistance in a circuit where a
voltage is present.

Battery Test         ,        

1 Set the selector knob to         or      .
2 Apply the black test pin to the (-)

battery terminal and red test pin to
the (+) battery terminal.

3 Read the move of the pointer

or      scale. 

range: 20

load

For measure the cylindrical type
battery (R03, R6, R14, R20, LR03,
LR6, LR14, LR20, etc.)

range: 60k

load

For measure the button type battery (SR43, SR44, LR43,
LR44, PR41, PR44, etc.)

Measuring Capacity µF        

1 Set the range selector knob to µF X1 or

µF X100.

2 Measure capacitance by applying the

test pin to the capacitor to be measured
after 0

adjustment made in the

same manner as in the resistance
measurement.

3 The pointer moves full scale by the charge current to the

capacitor. However, the pointer starts gradual returning from a
certain point. Read the indicated maximum value on µF scale.

Note

: Be sure to short circuit the both ends of the capacitor for

discharge prior to the initial measurement or in such case
to measure after the measurement was once made.

Note

: Pay due attention to the polarity (+ and -) of the capacitor.

(C side of the capacitor to black test pin of the
tester.)

SCALE READING

X 100k

X 100k

X 1k

X 1k

X 10

X 10

X 1

X 1

DCV 30

X 0.1

DCV 3

X 0.01

DCV 0.3

X 0.001

ACV 300

X 1

ACV 30

X 0.1

DCA 0.3

X 0.001

DCA 30m

X 0.1

DCV 600

X 10

ACV 600

X 10

DCA 60 µ

X 1

DCV 120

X 10

DCV 12

X 1

ACV 120

X 10

ACV 12

X 1

µF X 100

X 100

µF X 1

X 1

X 1

X 1


 

1.5V

1.5V

NAMES OF COMPONENTS

BODY COVER, TEST LEADS, HAND STRAP

Use of Cover 

(example for the body cover)

When this tester is out of use:
Attach the cover to the panel face for safekeeping.

When measuring:
Attach it either to the rear case side
or use it as a stand as illustrated.

Store of Test Leads

When placing the test leads in the
storing space, roll it 3 times, then put
in the test pin side first for store in
the place (test lead store space) as
illustrated.

Attachment of Hand Strap

1 Loosen the screw fixing the rear

case and remove it.

2 Hand strap is attached to con-

necting point.

3 Put back the rear case was and

fix it with the screw.

MAINTENANCE

How to Replace Battery

1 Loosen the screw fixing the rear

case and remove it.

2 Replace R6 (UM-3) dry battery.

3 Put back the rear case where it

was and fix it with the screw.

How to Replace Fuse

If an overload above lighting voltage
(about 100V) is applied to DCA and

ranges, the fuse is blown to

protect the circuit.

1 Loosen the screws fixing the rear case and remove it.

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

3 Put back the rear case where it was and tighten the screws.

4 Check and see whether or not indications of respective

ranges are normal (check other parts for any failures).

WARNING

• Be sure to use the fuse in same rating (0.5A/250V)

so as to ensure safety and performance of tester.

• Do not absolutely use the fuse in different rating or

short-circuit fuse holder terminals with copper wire.

• When operator removes the rear case, do not touch

the internal parts or wire with hand.

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.
This warranty policy is valid within the country of purchase only,
and applied only to the product purchased from Sanwa author-
ized agent or distributor.
Sanwa reserves the right to inspect all warranty claims to deter-
mine the extent to which the warranty policy shall apply. This
warranty shall not apply to fuses, test leads, disposables batter-
ies, 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 peo-

ple 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.

Repair

Customers are asked to provide the following information
when requesting services:
1. Customer name, address, and contact information
2. Description of problem
3. Description of product configuration

4. Model Number
5. Product Serial Number
6. Proof of Date-of-Purchase
7. Where you purchased the product
1) Prior to requesting repair,please check the following:

Capacity of the built-in battery, polarity of installation and
discontinuity of the test leads.

2) Repair during the warranty period:

The failed meter will be repaired in accordance with the
conditions stipulated in Warranty and Provision.

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. This
retention period is the repair warranty period. Please
note, however, if such functional  parts become unavail-
able for reasons of discontinuation of manufacture, etc.,
the retention period may become shorter accordingly.

4) Precautions when sending the product to be repaired

To ensure the safety of the product during transporta-
tion, place the product in a box that is larger than the
product 5 times or more in volume and fill cushion mate-
rials 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.

SANWA web site

http://www.sanwa-meter.co.jp
E-mail: [email protected]

SPECIFICATIONS

AFTER-SALE SERVICE

MEASURING PROCEDURE

SP-18D

MULTITESTER

INSTRUCTION MANUAL

Summary of Contents for SP-18D

Page 1: ...などを加えますと ヒューズが切れ て回路を保護します Ωレンジでメータを振らせる操作をしても 5頁参照 メータがまった く振れない原因は ヒューズの切れがほとんどです 1 5V 警告 ヒューズは安全や性能を維持するため 同定格のもの 0 5A 250V をご使用ください 入手しにくい場合は 当社へご注文ください また 別定格のヒューズを用いたりヒューズホルダ端子 間を銅線などで短絡することは絶対にしてはいけません リヤケースをはずしたとき ヒューズおよび電池以外の 内部の部品や配線に手を触れないでください 1 ヒューズの交換は リヤケースをはずし 回路基板上のホルダか ら熔断したヒューズを抜きとり 新品ヒューズと差換えます 2 リヤケースを元どおりねじ止めしてから 各レンジの指示が正常 かどうかをチェックします 内蔵電池左側の予備ヒューズをご使用ください 上図参照 10 お取扱い上の一般的...

Page 2: ...te DCA range 2 Take out measured circuit and apply the black test pin to the minus potential of meas ured circuit and the red test pin to the plus potential 3 Read the move of the pointer by V and A scale WARNING Connect the meter in series with the load Cut off Measuring Ω 1 Turn the range selector knob to an appropriate Ω range 2 Short the red and black test pins and turn the 0Ω adjuster so that...

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