SAFETY PRECAUTIONSPRECAUTION

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.

1 Avoid giving the tester any excessive shock or vibration byloading 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 hightemperatrue (higher than 55 ℃ ) a high humidity (higherthan 80 %), and dew condensation.
4 The meter cover is treated with antistatic coating. Do notwipe it hard or clean it with volatile solvent. Use a softbrush to remove dust.

Warning Instruction for Safe Use

WARNINGTo ensure that the meter is used safely, be sure to observe theinstruction when using the instrument.
Please be careful that the protection circuit may be undermined byunjustifiable usage that does not follow the guidelines in the instruction manual.
11. Never use the meter on the electric circuits that exceed 6 kVA.
12. Pay special attention when measuring the voltage of AC 33 Vrms
(46.7 V peak) or DC 70 V or more to avoid injury.
13. Never apply an input signals exceeding the maximum rating input
value.
14. Never use the 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.
15. Never use the meter if the meter or test leads are damaged or broken.
16. Never use uncased meter.
17. Be sure to use a fuse of the specified rating or type. Never use asubstitute of the fuse or never make a short circuit of the fuse.
18. Always keep your fingers behind the finger guards on the probe
when making measurements.
19. 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 andrange 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 thetester at least once a year.
14. Indoor use.

Thank you for purchasing a SANWA tester, Model SP-18D. You arekindly requested to thoroughly read this manual before use forsafety. Especially, "SAFETY INFORMATION" and "MEASURING
PROCEDURE" are important. Keep this manual together with thetester not to lose it.

MAXIMUM OVERLOAD PROTECTION INPUT
Maximu rating
input value

Function (Range)
DCV 120～600

Maximum overload
protection input

SP-18DDC 1000 V, AC 750 V
or PEAK MAX 1100 V

ACV 120～600
Full scalevalue atthe ranges

DCV 0.3～30
ACV 12～30
DCA 30 m/0.3

MULTITESTER*DC, AC 200 V
or PEAK MAX 250 V

DCA 60 µ
Voltage and current
input prohibitedΩDC 2 V

1.5V

Note : AC voltage is regulated by rms value of sinusoidal wave.
”*” is within 5 second.

Dempa Bldg., 4-4 Sotokanda 2-Chome
Chiyoda-ku, Tokyo, Japan

INSTRUCTION MANUALMEASURING PROCEDUREWARNING
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 alignright to the zero position.
2 Range selection:
Select a range proper for the item to be measured set therange selector knob accordingly.
NOTE
When determining a measuring range, select such one forhigher 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 casethe extent of value to be measured can not be predicted.
Measuring DCV
1 Set the range selector knob toan appropriate DCV range.
2 Apply the black test pin to theminus potential of measured
circuit and the red test pin tothe plus potential.
3 Read the move of the pointerby V and A scale.

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 12 V
scale for 12 V 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 DCAWARNING
Connect the meter in series with the load.
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 measured circuit and the red test
pin to the plus potential.
3 Read the move of the pointerby V and A scale.

Measuring ΩWARNING
Do not measure a resistance in a circuit where avoltage is present.
1 Turn the range selector knob to an appropriate Ω range.
2 Short the red and black test pins and turn the 0 Ω adjuster sothat the pointer may align exactly to 0 Ω. (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.)
3 Apply the test pin to measured
resistance.
4 Read the move of the pointer byΩ scale.
Note: The polarity of + and - turns
reverse to that of the test pins
when measurement is done inΩ range.
Note: Be sure to use the same rated fuse. In case a fuse otherthan the same rated one (see “SPECIFICATIONS“) isused, error in indication occurs and/or circuit protection
is made unable.
Note: Operating voltage of Ω range for this tester is 3 V and,accordingly, operator can make lighting test of LED.
X10 range is optimum for the test.

Cut off.

SCALE READINGNAMES OF COMPONENTS

Battery Test,
1 Set the selector knob toor.
2 Apply the black test pin to the (-)
battery terminal and red test pin tothe (+) battery terminal.
3 Read the move of the pointerorscale.
•range: 20 Ω load
For measure the cylindrical typebattery (R03, R6, R14, R20, LR03,LR6, LR14, LR20, etc.)•range: 60 kΩ 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 orµF X100.
2 Measure capacitance by applying thetest pin to the capacitor to be measured
after 0 Ω adjustment made in thesame manner as in the resistancemeasurement.
3 The pointer moves full scale by the charge current to thecapacitor. However, the pointer starts gradual returning from acertain point. Read the indicated maximum value on µF scale.
Note: Be sure to short circuit the both ends of the capacitor fordischarge prior to the initial measurement or in such caseto measure after the measurement was once made.
Note: Pay due attention to the polarity (+ and -) of the capacitor.
(Connect + side of the capacitor to black test pin of thetester.)

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 sideor use it as a stand as illustrated.

MAINTENANCE
How to Replace Battery
1 Loosen the screw fixing the rearcase 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 100 V) is applied to DCA
and Ω ranges, the fuse is blown toprotect the circuit.

Ω X 100 k

X 100 kDCV 120

ΩX1k

X1k

DCV 12X1Ω X 10

X 10

ACV 120

X 10ΩX1X1

ACV 12

X1

DCV 30X 0.1µF X 100

X 100

DCV 3

X 0.01µF X 1

X1

DCV 0.3

X 0.001

1.5V

X1

ACV 300

X11.5VX1

ACV 30

X 0.1

DCA 0.3

X 0.001

DCA 30 m

X 0.1

DCV 600

X 10

ACV 600

X 10

DCA 60 µ

X1

X 10Store of Test Leads
When placing the test leads in thestoring space, roll it 3 times, then put
in the test pin side first for store inthe place (test lead store space) asillustrated.

Measurement Range and AccuracyAccuracy assurance range : 23±2 ℃ 75 %RH max.
No condensation
Attitude: Horizontal (±5°)
ACV accuracy in the case of sine wave AC.

DCVCV

ACV ～DCACVΩ
Batteryload
voltage
Capacity(µF)

Full scale value

Accuracy

Remarks0.3±3 %
againstfull scale

Input impedance 5 kΩ

3-12-30-120-600
12-30-120-300-600±3 %againstfull scale

Input impedance 20 kΩ/V
Input impedance 9 kΩ/V
Freq. (within ±3 % f.s.)
30 Hz-70 kHz (12 V range)
30 Hz-20 kHz (30 V range)±3 %againstfull scale

Voltage drop 0.3 VNot including the resistance of the fuse2 k-20 k-2 M(X1) (X10) (X1 k)±3 % of arc

200 M(X100 k)±5 % of arc

Center value 20 ΩMax. value 2 kΩRelease voltage 3 V60 µ-30 m-0.3

AFTER-SALE SERVICE

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 250 V is impressed on each range for 5 seconds.

Internal battery

R6 (IEC) or UM-3 1.5 V X 2Internal fuse

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

Accuracy assurance
Temperature/Humidity range

23±2 ℃, 75 %RH max. no condensation

Operating temperatureand humidity range

0 ~ 43 ℃, 80 %RH max. no condensation

Withstand voltage

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

Dimensions and Mass

159.5 X 129 X 41.5 mm/ approx. 320 g

Accessories

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

Optional Accessories
Alligator clip CL-14 IC test clip TL-9IC

2.0 V

Load resistance 20 Ω

APPLICATION AND FEATURE

2.0 VLoad resistance 60 kΩ

Application
This instrument is portable multitester designated for measurement of weak current circuits.
Feature• Our technology has made it possible to measure highresistance (up to maximum 200 MΩ) with low voltage.
• Band meter of drop shock type with high sensitivity has
been employed.

10-1000

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

Attachment of Hand Strap
1 Loosen the screw fixing the rearcase and remove it.
2 Hand strap is attached to connecting point.
3 Put back the rear case was andfix it with the screw.

SPECIFICATIONSFunction

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).

Pointer indication of themaximum move by
charged current in thecapacitor.

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 theinstruction manual.
The ”battery for monitoring” is a battery to inspect the functions
and specifications of the product.

The specifications described in this manual are subject tochage without notice.

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 inworkmanship or material under normal use for the period ofone (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 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, test leads, 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 deviatesfrom 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 productsuch 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.
RepairCustomers 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 product1) Prior to requesting repair,please check the following:
Capacity of the built-in battery, polarity of installation anddiscontinuity of the test leads.
2) Repair during the warranty period:
The failed meter will be repaired in accordance with theconditions 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. Thisretention period is the repair warranty period. Please
note, however, if such functional parts become unavailable 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 transportation, place the product in a box that is larger than theproduct 5 times or more in volume and fill cushion materials fully and then clearly mark ”Repair ProductEnclosed” on the box surface. The cost of sending andreturning the product shall be borne by the customer.
SANWA web site
https://www.sanwa-meter.co.jp
E-mail: exp_sales@sanwa-meter.co.jp