8. Never use the instrument when it is wet or with wet hands.
9. Never attempt repair or modification, except for battery
10. Perform start-up inspection and inspect the instrument at least
once a year.
11. This instrument is for indoor use only.
12.Do not use the instrument in a method other than specified.
Otherwise, the protection function may be spoiled.
4-5 Backlight and LED light
The LCD green backlight and the LED light light when the instrument
is turned ON. The backlight color changes to orange when the input
is AC or DC and 20 V or more, or when the AC live wire is detected in
the EF mode.
* The light cannot be turned OFF except by turning the instrument OFF.
3-1 Main unit and test leads
EF detection antenna
LED light
Backlit LCD
Lead hook
1.Accurate measurement may be impossible near a source of
strong magnetic field such as a transformer or large-current
line, near a source of electromagnetic wave such as a wireless
device or near a charged object.
2.This instrument may malfunction or the measurement result
may become abnormal if this instrument is used with a special
waveform such as that of an inverter circuit.
voltage measurement
Buzzer LED
Lead reel
Max. rated input
Max. overload
protection input
Strap hole
AC/ DC 1000 V
1050 V rms,
1450 V peak
TL-36: Test lead (black), approx. 1.5 m
TL-A01: Test probe (black)
Test pins
Φ4 plug
Electric field detection
Φ4 plug
Test pins
2-1 Applications
Dempa Bldg., 4-4 Sotokanda 2-Chome
Chiyoda-ku, Tokyo, Japan
01-1410 2040 6010
Before use, read the following safety precautions.
Thank you for purchasing our voltage tester equipped with the electric
field detection facility model KP1.
Before use, please read this manual thoroughly to ensure correct
and safe use. After reading it, keep it together with the product for
reference to it when necessary.
Using the product in a manner not specified in this manual may cause
damage to the protection function of the product.
The instructions given under the headings of “ WARNING” and
“ CAUTION” must be followed to prevent accidental burn and
electric shock.
1-1 Explanation of warning symbols
The meanings of the symbols used in this manual and attached to the
product are as follows:
: Very important instructions for safe use.
•The warning messages are intended to prevent accidents to
operating personnel such as burn and electric shock.
•T he caution messages are intended to prevent incorrect
handling which may damage the product.
: Refer to Instruction Manual before use
: Double or reinforced insulation
: Ground
: Circuit continuity buzzer
: Backlight
1-2 Warning instructions for safe use
This instrument is a voltage tester of the RMS value response type
equipped with the electric field detection facility. It is designed for
measurements in the ranges specified by IEC 61010-1 CAT. IV 600 V
and CAT. III 1000 V.
Recent multiinstruments have been increasing the facilities and
becoming capable of measuring a larger variety of items in simpler
ways. Nevertheless, this trend also means that the risk of operation
mistake is increasing because of the presence of facilities that are not
required by all of the users.
This instrument has been designed to meet the actual needs of the fields
of electrical equipment maintenance by prioritizing the usage without
operation mistakes, reducing the size for higher portability and limiting
the facilities to voltage measurement and electric field detection while
complying with safety standards. It is suitable for voltage measurement
and electric field detection of low-voltage lines and equipment.
TL-35: Test probe (red)
DC Voltage
Data Hold
Low battery
Live wire alarm
When the probe is separated from the measurement target during
auto-identifying voltage measurement or when the input drops below
about 5 V, the instrument automatically holds the last measurement
value displayed on the LCD. During auto hold,
appears on the
LCD and the displayed value flashes.
* A numeric value other than the measured value may appear momentarily
before the held value is displayed, but this is not malfunction.
4-9 EF (Electric Field) detection: EF button
3-2 Display
AC Voltage
4-8 Auto hold
This EF detection identifies the presence of voltage in a simple
manner by detecting an electric field generated by an AC voltage.
For details, see 5-4 EF (Electric Field) detection.
Φ4 plug
4-10 AC detection method
This instrument employs the RMS (Root-Mean-Square) method and
indicates the magnitude of AC current as the same amount of work as
DC. RMS values of sinusoidal waves and such non-sinusoidal waves
as square and chopping waves can be measured by the true RMS
circuit. (The input signal measurement value is used as the scale of the
actual input signal power so it is therefore measured as a more
effective value than the value obtained by average detection.)
4-11 CF (Crest Factor)
Minus sign
Numeric value
and decimal
The CF (Crest Factor) indicates the peak value of a signal divided by
its RMS value. With most common waveforms such as sinusoidal and
chopping waves, the CF is relatively low.
With waveforms similar to pulse trains with low duty cycle, the CF is high.
For the voltages and CFs of typical waveforms, see the table below.
The CR of measurements should be 2 or less.
2-2 Features
• Safe use with low-voltage equipment – IEC61010 CAT. IV 600 V
and CAT. III 1000 V compatibility.
• Single-button system – Easy operation for preventing operation
• Auto identification of AC or DC voltage – AC measurement in true
RMS value.
• Easy identification of 24 V type FA control panel voltage – The
backlight color changes at 20 V or more.
• Auto hold – The result of the last measurement is held
• Self-test – Checking failures of the LCD or disconnection of a
lead wire.
• AC electric field detection – Both contact and noncontact
methods are available.
• Designed to fit the chest pocket of the working uniform.
• LED light for illuminating the working site.
Measurement Category (Overvoltage Category)
­ easurement Category II (CAT. II):
Line on the primary side of equipment with power cord to be
connected to the receptacle.
Measurement Category III (CAT. III):
Line from the primary side or branch of equipment which directly
takes in electricity from a distribution board to the receptacle.
Measurement Category IV (CAT. IV):
Line from the service conductor to the distribution board.
The following instructions are intended to prevent injury such as burn
and electric shock. Be sure to follow them when using the instrument:
Input Waveform
4-1 Changing the measuring probe angle
The angle of the
measuring probe can
be changed by
removing it from the
main body, positioning
it in the desired angle
and inserting it straight
into the main body.
Be sure to insert the
measuring probe all
the way until it is fixed.
4-2 Power/Select button
The function of the Power/Select button varies depending on the period
it is pressed. In this manual, we use the term “push” for the action of
pressing the button temporarily and the term “hold” for the action of
pressing and holding the button for more than one second.
Hold this button to turn the instrument ON/OFF. Note that the instrument
cannot be turned OFF while it is accepting an input.
Push the button while the instrument is ON to switch the measurement
The instrument is in the self-test mode (
displayed) when it is
turned ON. Thereafter, each press of this button switches the modes
in the following cycle. (For the description of each mode, see [5]
displayed) ⇒
Auto-identifying voltage measurement mode (
EF mode (
displayed) ⇒ Auto-identifying voltage measurement
mode ⇒ … (repeat)
1.This instrument is a voltage tester equipped with the electric
field detection facility. Do not use it with an electric circuit
exceeding 1000 V.
2. Voltages over DC 70 V or AC 33 V rms (46.7 V peak) are
hazardous to human body. Take care so as not to touch them.
3. Never input signals exceeding the maximum rated input value
(see 1-3).
4.Never use the instrument for measuring a line connected to
equipment that may generate induced or surge voltage (such
as a motor) because an input exceeding the maximum
allowable overload input may be applied.
5.Never use the instrument if the instrument or test leads are
damaged or broken.
6. Never use the instrument with the case or battery lid removed.
7. During measurement, do not hold the instrument by a position
on the test pin side of the barrier on the test probe.
− 1 −
When an input of 5 V or more is applied in the self-test or auto-identifying
voltage measurement mode, the instrument automatically identifies
whether the input is an AC or DC voltage and displays the measured value.
Power/Select button
This manual emplys soy ink.
This self-test checks disconnection of the test lead wires, lack of
display segments and failure of the buzzer and buzzer LED light.
For details, see 5-2 Self-test mode.
4-7 AC/DC auto-identifying voltage measurement
Probe holder
1-3 Overload protection
Lead holder
Test probe
4-6 Self-test
p p
=0.577 Vp =0.5 Vp =1.732
-・Vp -・Vp
4-12 Storage of lead
Lead hook
Lead holder
Lead holder: After winding the lead
around the lead reel for storage,
tuck the remaining section of the
lead in this space to prevent
spontaneous unwinding.
Lead hook: Hook the lead on these
parts when the lead is used
without unwinding fully.
Strap hole: Use this hole when attaching
a strap or like to the instrument.
Strap hole
4-4 Low battery alarm
− 2 −
Voltages of Various Waveforms
4-3 Auto power OFF
When the instrument is left without input for about one minute since the
last operation, Auto power OFF turns automatically the display and the
power of the instrument OFF. To recover from the auto power OFF, hold
the Power/Select button for more than one second.
Mean Average Crest
0 to PEAK Root
Factor Factor
Square Value Value
Vavg Vp/Vrms Vrms/Vavg
2 Vp
- -
=0.707 Vp =0.637 Vp =1.414 =1.111
When the built-in batteries have been discharged and the battery voltage
has dropped to below about 2.5 V,
mark appears on the display.
When this mark appears, replace both of the two batteries with new ones.
If the battery voltage drops below about 2.2 V,
appears on the
LCD and the instrument becomes unable to continue measurement.
1. Do not apply an input signal exceeding the maximum rated input value.
2. During measurement, do not hold the instrument by a position on the
test pin side of the barrier on the test probe.
3. Use test leads matching the measurement category of the measured
− 3 −
− 4 −
5-1 Start-up inspection
Be sure to perform the start-up inspection before proceeding to
• Exterior check: Check the external view for irregularity caused by
dropping, etc.
indicator is not lit. If it is lit, replace the batteries
• Check that the
with new ones.
• Accessories: Check that the test leads are free of irregularity such
as wire disconnection or crack.
• Make sure that the main unit and hand are not wet with water, etc.
* If the display shows nothing, the batteries may be exhausted completely.
5-2 Self-test mode
① The LCD shows
when the instrument is
turned ON.
② Short-circuit the test pins.
③ All of the numeric value segments and marks
are displayed on the LCD and the backlight
changes color between green and orange
alternately. Confirm that the buzzer beeps and
that the buzzer LED lights up.
* The instrument does not enter the self-test mode
if the wire of a test lead is disconnected.
④ When the test pins are disconnected, the
instrument enters the auto-detecting voltage
measurement mode, in which the LCD displays
Backlight: Alternates between green and orange
Backlight: Green
Backlight: Green
5-4 EF (Electric Field) detection
6-4 Battery replacement
1. Before proceeding to the EF detection, check the proper
operation of this instrument using a known power source.
2. During EF detection, do not hold the instrument by a position
on the test pin side of the barrier on the probe.
3. Do not touch the power line because it is not always voltagefree but there may be a voltage below the detectable voltage.
① EF detection identifies the presence of AC voltage in a simplified
manner, by detecting the electric field generated by it.
The standard detection level is from about 60 to 1000 V AC. When
an electric field is detected, the LCD backlight changes color from
green to orange, and the number of bars, the intervals of buzzer
beeps and the flashing interval of the buzzer LED vary in five steps.
in the
② Push the Power/Select button so that the LCD shows
main numerical value display area.
③ Check method
• Noncontact type measurement: Position the antenna as shown in
the illustration (on the right side of the light when the instrument is
viewed from the front).
• Contact type measurement: Bring the test pin (either the black or
red one) in contact with the target. More accurate EF detection is
possible so that the buzzer does not beep and the display
in the grounding phase.
* In certain cases in which the wiring is long, for example,
sometimes become “-” even on the grounding side.
* Due to the high sensitivity, the EF sensing may be activated near
an inverter generating high frequencies, even when it is as apart as
more than some tens of centimeters from the instrument.
Disconnect test
pins for voltage
test pins
Buzzer beep generated, buzzer LED lit
5.0 ~ 999.9 V
5.0 ~ 999.9 V
Threshold 20 k ~ 500 kΩ or less
when there is no input.
② When a voltage of 5 V or more is input, the instrument automatically
detects whether it is an AC voltage (ACV) or DC voltage (DCV) and
displays the corresponding mark together with the measurement
When a voltage of 20 V or more is input,
appears on the LCD
and the backlight color changes from green to orange.
③ When the probe is removed from the measurement target or
the input drops below about 5 V, the last measurement value is
automatically held displayed on the LCD (data hold). In the data
hold status, the
mark appears and the held numerical value
* The data hold status continues until the next time a voltage is input
or auto power OFF is activated.
Backlight: Orange
Backlight: Green
voltage input
Backlight: Green
No input
Automatic data hold
of voltage value
Backlight: Green
Voltage value display
Green: Input voltage < 20 V
Orange: Input voltage ≥ 20 V
Backlight: Orange
No input
voltage input
Voltage value display
Buzzer generated, buzzer LED lit
* When there is an input voltage between
about 1.5 to 4.9 V,
displayed and the instrument does not
work even when the resistance is below
the threshold.
* Due to the high threshold value, the
resistance may be as high as max. 500 kΩ
even when the buzzer beep is generated.
− 5 −
Backlight: Green
Backlight: Orange
Undetected status
Detected status
(Contact type)
Backlight: Orange
Detected status
(Noncontact type)
1.The following instructions are very important for safety.
Read this manual thoroughly to ensure correct maintenance.
2.Calibrate and inspect the instrument at least once a year to
ensure safety and maintain its accuracy.
6-1 Maintenance and inspection
1) Appearance: Is the instrument not damaged due to falling or
other cause?
2) Test leads:
• Is a plug loose when it is inserted into the measured terminal?
• Is the cord of a test lead damaged?
• Is white coating exposed from the coating of a test lead?
If any of the above problems exists, stop using the instrument and
contact us for repair or part replacement.
6-2 Calibration and inspection
Automatic data hold of
voltage value
④ When the voltage input is below about 1.5 V and the resistance
is below the threshold value, the continuity buzzer beeps and the
buzzer LED lights up. All of the numeric value segments and marks
are displayed on the LCD and the backlight changes color between
green and orange alternately.
Backlight: Alternately green and orange
① Unwind the test lead (black) from
the lead reel so that the screws are
a Phillips screwdriver, remove
the two battery cover retaining
③ Replace both of the two batteries in
the battery holder with new ones by
taking care of the polarity.
④ Attach the battery cover and retaining
screws in the original positions.
* The battery cover incorporates a
magnet so care is required when
closing it.
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
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 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.
5-3 Auto-detecting voltage measurement
① The LCD displays
1. To avoid electric shock, do not remove the battery cover while
an input is applied to the measured terminal or during
2. Make sure that the instrument is set to OFF before replacing the
7-1 Warranty and provision
* When a voltage of 5 V or more is input while
appears on the
LCD, the instrument enters the auto-detecting voltage measurement
mode and displays the value of the input voltage.
Function (Auto detection)
ACV (45 ~ 400 Hz)
Circuit continuity
Batteries when the instrument is shipped:
A battery for monitoring has been installed prior to shipment
from the factory. It may be discharged before the expiration of
the described battery life.
*The battery for monitoring is a battery used to check the
functions and performance of the product.
For more information, please contact Sanwa’s authorized agent /
distribute service provider, listed in our website.
See section 7-2-4.
6-3 Cleaning and storage
1.The panel and case are not resistant to volatile solvent and
must not be cleaned with thinner or alcohol.
If the instrument gets dirty, wipe with a soft cloth moistened
with a small amount of water.
2.The panel and case are not resistant to heat. Do not place the
instrument near heat-generating devices.
3. Do not store the instrument in a place where it may be
subjected to vibration or where it may fall.
4.Do not store the instrument in places under direct sunlight, or
hot, cold or humid places or places where condensation is
5.If the instrument will not be used for a long time, remove the
− 6 −
8-1 General Specifications
Operation method
Δ-Σ method
AC detection method
True RMS
Numerical value: Max. 9999 counts. With backlight
Sampling rate
ACV: Approx. 6 times/sec. DCV: Approx. 5 times/sec.
Over-range display
"OL" is displayed
Polarity switching
Auto (Only “-” is displayed.)
indicator lights on the display when the
supply voltage from the batteries drops below about
2.5 V.
Low battery indication
If the battery voltage drops below about 2.2 V,
appears on the LCD and the instrument becomes
unable to continue measurement.
Operating environmental Altitude no more than 2000 m, indoor use,
environmental pollution degree II
Operating temperature/
humidity ranges
Temperature: 5 to 40 °C
Humidity is as follows (without condensation).
5 to 31 °C: Max. 80 %RH
31 to 40 °C: Linearly decreases from 80 %RH to 50 %RH.
Temperature -10 to +40 °C: No more than 80 %RH,
without condensation
Storage temperature/ Temperature +40 to +50 °C: No more than 70 %RH,
without condensation
humidity ranges
(Remove the batteries when the instrument is not to be
used for long time.)
At below 18 °C or above 28 °C, multiply accuracy by
x0.15 per 1 °C.
Power supply
LR03 (“AAA”-size alkaline battery), 1.5 V x 2
Auto power off
The instrument power is turned OFF in about 1 min.
after the last operation. Standby current: Approx. 5 µA
Current consumption
Approx. 20 mA (standby)
Battery life
Approx. 20 hours (continuous measurement of 40 V DC)
130(H)×90(W)×30(D) mm /
approx. 205 g (including batteries)
Safety standards
IEC61010-1, IEC61010-2-030 CAT. IV 600 V / CAT. Ⅲ
1000 V, IEC61010-2-33, IEC61010-31
EMC directive
Instruction manual, test leads (TL-35: Test probe (red),
TL-36: Test lead (black); approx, 1.5 m, TL-A01: Test
probe (black))
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.
8-2 Measuring ranges and accuracies
7-2 Repair
rdg: Reading
Customers are asked to provide the following information when
requesting services:
1. Customer name, address, and contact information
2. Description of the problem
3. Description of the product configuration
4. Model Number
5. Product Serial Number
6. Proof of Date-of-Purchase
7. Where you purchased the product
Please contact Sanwa authorized agent / distributor / service
provider, listed in our website, in your country with above information.
An instrument sent to Sanwa / agent / distributor without above
information will be returned to the customer.
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 instrument will be repaired in accordance with the
conditions stipulated in 7-1 Warranty and provision.
3) Repair after the warranty period has expired:
• If it is expected that servicing can restore the original functioning of the
product, we will service it for a price upon request of the user.
• The service charge or transport freight could sometimes become higher
than the product price. Please consult us before asking for servicing.
• The minimum retention period of the servicing performance parts of this
product is six (6) years after the discontinuation of production. This
period is equal to the servicing available period. However, the retention
period of a part may be reduced if it becomes unavailable due to
discontinuation of production of the part manufacturer, etc.
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.
Accuracy-guaranteed temperature/humidity ranges:
23 ±5 °C, no more than 80 %RH, (without condensation).
should not be displayed.
Crest factor (CF): < 2
dgt: Lowest digit
ACV (AC voltage)
Measurement range: 5.0 ~ 999.9 V. Accuracy: ±(1.7 %rdg + 5dgt).
Note: Input impedance approx. 1.7 MΩ at 160 nF, frequency range
45 ~ 400 Hz
DCV (DC voltage)
Measurement range: 5.0 ~ 999.9 V. Accuracy: ±(0.7 %rdg + 5dgt).
Note: Input impedance approx. 1.7 MΩ at 160 nF
Circuit continuity
Open voltage: Approx. 0.6 V DC. Buzzer threshold: 20 ~ 500 kΩ
EF (Electric Field) detection
A voltage or electric field of about 60 V or more is detected.
The bar graph and intermittent buzzer beeps change in five steps
according to the field intensity.
Detection frequency: 50/60 Hz
Detection antenna: Top of the instrument body
(on the right of the LED light)
Contact type EF detection: + terminal test pins
Accuracy calculation method
Example: ACV (AC voltage) measurement
Displayed value: 100.0 V
Range and accuracy: 999.9 V range, ±(1.7 %rdg + 5dgt)
Error: ±(100.0 V x 1.7 % + 5dgt) = ±2.2 V
True value: 100.0 V ±2.2 V (97.8 to 102.2 V)
* In the 999.9 V range, the 5 digit corresponds to 0.5 V.
The product specifications described in this manual and its
appearance are subject to change without notice for
improvement or other reasons.
7-3 SANWA web site
E-mail: [email protected]
− 7 −
− 8 −
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