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This instruction manual explains how to use your multitester SP-18D,
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 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.
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 instruction manual.
11. Never use the meter on the electric circuits that exceed 6kVA.
12. Pay special attention when measuring the voltage of AC 33 Vrms
(46.7V peak) or DC 70V or more to avoid injury.
13. Never apply an input signals exceeding the maximum rating input
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 a
substitute 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 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.
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.
Maximu rating
input value
Function (Range)
Maximum overload
protection input
DC1000V, AC750V
or PEAK MAX 1100V
Full scale
value at
the ranges
*DC, AC200V
or PEAK MAX 250V
Voltage and current
input prohibited
Note : AC voltage is regulated by rms value of sinusoidal wave.
”*” is within 5 second.
Dempa Bldg.,Sotokanda2-Chome
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.
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
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 pointer
by V and A scale.
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 Ω
Do not measure a resistance in a circuit where a
voltage is present.
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 the pointer may align exactly to 0Ω. (If the pointer fails
to swing up to 0Ω even when the 0Ω adjuster is turned
clockwise fully, replace the internal battery with a fresh one.)
3 Apply the test pin to measured
4 Read the move of the pointer by
Ω scale.
Note: The polarity of + and - turns
reverse to that of the test pins
when measurement is done in
Ω 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 Ω range for this tester is 3V and,
accordingly, operator can make lighting test of LED.
X10 range is optimum for the test.
Cut off.
Battery Test
1 Set the selector knob to
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
range: 20Ω load
For measure the cylindrical type
battery (R03, R6, R14, R20, LR03,
LR6, LR14, LR20, etc.)
range: 60kΩ 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 0Ω adjustment made in the
same manner as in the resistance
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.
(Connect + side of the capacitor to black test pin of the
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.
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
Ω ranges, the fuse is blown to
protect the circuit.
Ω X 100k
X 100k
Ω X 1k
X 1k
Ω X 10
X 10
DCV 120
X 10
DCV 12
ACV 120
X 10
ACV 12
µF X 100
X 100
µF X 1
DCV 30
X 0.1
X 0.01
DCV 0.3
X 0.001
ACV 300
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
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
Measurement Range and Accuracy
Accuracy assurance range : 23±2ºC 75%RH max.
No condensation
: Horizontal (±5º)
ACV accuracy in the case of sine wave AC.
Full scale value
full scale
full scale
full scale
(X1) (X10) (X1k)
±3% of arc
±5% of arc
Input impedance 20kΩ/V
Input impedance 9kΩ/V
Freq. (within ±3% f.s.)
30 Hz-70kHz (12V range)
30 Hz-20kHz (30V range)
Voltage drop 0.3V
Not including the resistance of the fuse
Center value 20Ω
Max. value 2kΩ
Release voltage 3V
Load resistance 20Ω
Load resistance 60kΩ
General 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.
Input impedance 5kΩ
Pointer indication of the
maximum move by
charged current in the
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.
Loosen the screws fixing the rear case and remove it.
Pull out the fuse out of holder on the circuit board and replace it.
Put back the rear case where it was and tighten the screws.
Check and see whether or not indications of respective
ranges are normal (check other parts for any failures).
• 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.
Attachment of Hand Strap
1 Loosen the screw fixing the rear
case and remove it.
2 Hand strap is attached to connecting point.
3 Put back the rear case was and
fix it with the screw.
Internal battery
R6 (IEC) or UM-3 1.5V X 2
Internal fuse
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
3kV AC (1min.) between input test pin and case
Dimensions and weight
159.5 X 129 X 41.5 mm/ approx. 320g
Instruction manual 1, Hand strap 1,
Spare fuse 1 (contained in the rear case)
Repair test leads
Optional Accessories
Alligator clip CL-11 IC test clip TL-8IC
This instrument is portable multitester designated for measurement of weak current circuits.
• Our technology has made it possible to measure high
resistance (up to maximum 200MΩ) 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.
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 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 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.
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
Model Number
Product Serial Number
Proof of Date-of-Purchase
Where you purchased the product
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 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 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.
SANWA web site
E-mail: [email protected]
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