Sanwa RD700 User manual

DRAWING No. RD700/701 06-1404 2040 6010
INSTRUCTION MANUAL
RD700
RD701
DIGITAL MULTIMETER

DRAWING No. RD700/701 06-1404 2040 6010
CONTENTS
[1] SAFETY PRECAUTIONS
*Before use, read the following safety precautions.
1-1 Explanation of Warning Symbols …………………………001
1-2 Warning Instruction for Safe Use …………………………001
1-3 Overload protections ………………………………………002
[2] APPLICATION AND FEATURES……………………………003
[3] NAME OF FUNCTION ………………………………………004
[4] DESCRIPTION OF FUNCTIONS
4-1 Function Switch ……………………………………………005
4-2 Auto Power Off ……………………………………………005
4-3 Low Battery Indication ……………………………………005
4-4 Measurement Function Select: SELECT ………………005
4-5 Range Hold: RANGE ………………………………………006
4-6 Data Hold: HOLD …………………………………………006
4-7 Max Hold: MAX …………………………………………006
4-8 Relative Mode: REL ……………………………………006
4-9 Mis-insertion alarm for current function: ALARM ………006
4-10 Words ………………………………………………………006
[5] MEASUREMENT PROCEDURE
5-1 Start-Up Inspection …………………………………………009
5-2 Voltage measurement / Frequency measurement ……010
5-3 Adapter measurement ……………………………………012
5-4 Resistance measurement and Capacitance measurement /
Testing Diode / Checking Continuity ……………………014
5-5 Temperature Measurement ………………………………018
5-6 Current Measurement ……………………………………019
[6] MAINTENANCE
6-1 Maintenance and Inspection ………………………………021
6-2 Calibration …………………………………………………021
6-3 Battery and Fuse Replacement …………………………021
6-4 Storage ………………………………………………………022
H

DRAWING No. RD700/701 06-1404 2040 6010
[7] AFTER-SALE SERVICE
7-1 Warranty and Provision ……………………………………023
7-2 Repair ………………………………………………………023
7-3 Sanwa web site ……………………………………………024
[8] SPECIFICATIONS
8-1 General Specification ………………………………………025
8-2 Measurement Range and Accuracy………………………028

DRAWING No. RD700/701 06-1404 2040 6010
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 6 kVA.
2. Never apply an input signal exceeding the maximum rating input
value.
3. Never use meter if the meter or test leads are damaged or broken.
4. Pay special attention when measuring the voltage of AC 33
Vrms (46.7 V peak) or DC 70 V or and over avoid injury.
—1 —
[1] SAFETY PRECAUTIONS
*Before use, read the following safety precautions.
This instruction manual explains how to use your new digital
multimeter RD700 or RD701 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 of “ WARNING” 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.
: Dangerous voltage (Take care not to get an electric shock
in voltage measurement.)
: Ground (Allowable applied voltage range between the input
terminal and earth.)
: Direct current (DC)
: Alternating current (AC)
: Fuse
: Double insulation (Protection Class )
1-2 Warning Instruction for Safe Use
WARNING

DRAWING No. RD700/701 06-1404 2040 6010
V/ ADP /Ω
/ / /
/TEMP
/Hz
•
COM
DC•AC 400 mA
—2 —
20 VAC rmsHz
µA•mA
Ω• •
• TEMP
0.63 A/500 VFuse
IR 50 kA
DC•AC 10 A
(10 A continuous)
A
V
ADP
Functions Input
terminals
Maximum rating
input value
Maximum overload
protection input
1-3 Overload protections
DC•AC 1000 V
DC•AC 400 mV
1050 Vrms, 1450 Vpeak
600 VDC/AC rms
Voltage and
Current input
prohibited
µA / mA
•
COM
A
•
COM
12.5 A/500 VFuse
IR 20 kA
15. 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.
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. When connect and disconnecting the test leads, connecting
the ground lead (black one) first. When disconnecting them,
theground leadmust be disconnected last.
19. Always keep your fingers below the finger guards on the
probe when making measurements.
10. Be sure to disconnect the test pins from the circuit when
changing the function.
11. Before starting measurement, make sure that the function and
range are properly set in accordance with the measurement.
12. Never use meter with wet hands or in a damp environment.
13. Do not use the device near an item of strong electromagnetic
generation or a charged item.
14. Never open tester case except when replacing batteries or
fuse. Do not attempt any alteration of original specifications.
15. To ensure safety and maintain accuracy, calibrate and check
the tester at least once a year.
16. The multimeter is restricted to indoor use only.

DRAWING No. RD700/701 06-1404 2040 6010
—3 —
[2] APPLICATION AND FEATURES
2-1 Applications
This instrument is portable digital multimeter designed for
measurement of weak current circuits. It plays an important role in
circuitry analysis by using additional functions as well as
measurements of small type communication equipment, electrical
home appliance, lighting voltage and batteries of various type.
2-2 Features
Fuse protects the current circuit and the terminals are mis-
insertion alarm.
It is the LCD that the value is able to read easily.
The function of the adapter probe is equipped.
The input impedance of the 400 mV range is 1000 M Ω.
It is possible to measure Frequency and Temperature. (K-type)
AC coupling True RMS (RD701)

DRAWING No. RD700/701 06-1404 2040 6010
[3] NAME OF FUNCTIONS
Holster
RELATIVE Button
LCD Display
Common Input Terminal
A measuring Terminal
SELECT Button
RANGE Hold
Button
V•Hz•ADP•Ω•
• • •TEMP
Measuring Terminal
µA•mA measuring
Terminal
POWER Switch and
FUNCTION Switch
DATA Hold Button /
MAX Hold Button
—4 —

DRAWING No. RD700/701 06-1404 2040 6010
[4] DESCRIPTION OF FUNCTIONS
4-1 Function Switch
Turn this switch to turn on and off the power and to select the
functions of ''V / V / Hz / ADP / Ω•••/ TEMP / µA /
mA / A''.
4-2 Auto Power Off
The meter will enter a low power consumption sleep mode
automatically to extend battery life after approximately 30 minutes
of no function switch or push button operations. To wake up the
meter from Auto Power Off, press any buttons momentarily or
turn the function switch to the OFF position. Then turn back on
again.To disable the Auto Power Off feature, press the SELECT
button while turning the function switch on.
Note: Always turn the function switch to the OFF position when
the meter is not in use.
4-3 Low Battery Indication
If the internal battery has been consumed and the internal battery
drops below approx. 2.6 V, Battery mark is shown in the display.
4-4 Measurement Function Select
When the SELECT button is pressed ( ), the functions change
as follows.
•In the case of ADP, µA, mA & A, the modes change as:
.
•In the case of Ω••• , the modes change as:
Ω Ω.
•In the case of TEMP, the modes change as:
.
—5 —

DRAWING No. RD700/701 06-1404 2040 6010
4-5 Range Hold : RANGE
Press the RANGE button momentarily to set the manual range
mode then ‘AUTO’ disappears in the display. In manual range
mode, press the button again to step through the ranges. To
return to the auto mode, press the button for 1 sec. or more then
AUTO is shown.
Note: Manual mode is not available in and Hz measurement.
4-6 Data Hold : HOLD
When the HOLD button is pressed, the display is hold (‘ ’ is
shown on the display). The display will not changed while the
function is active. Press the button again to cancel the
function. (‘ ’ on the display disappears.)
4-7 Max Hold: MAX
The max feature displays the measured maximum value as
fast as 30 ms in a single range, and with automatic up range
capability. This function is able to use it with voltage
measurement, current measurement and ADP measurement
function. Press the MAX button for 1 sec. or more to
activate or to exit the max feature in the voltage or current
functions.
4-8 Relative Mode : REL
Relative zero allows the user to offset the meter consecutive
measurements with the displaying reading as the reference value.
Press the REL button momentarily to activate and to exit
relative zero mode.
4-9 Mis-insertion alarm for current function : ALARM
The instrument beeps to warn the user against possible damage
to the instrument due to improper connections to the µA, mA, or A
input terminals when other function (like voltage measurement
function) is selected.
—6 —
H
H
H
H

DRAWING No. RD700/701 06-1404 2040 6010
—7 —
4-10 Words
AC Sensing
Average RMS: RD700
When measurement is taken by "average", no error is caused as the
input signal is shine wave with no distortion. However, if the input
waveform is distorted sine cave or non-sinusoidal wave, conversion to
root-mean-square values is very difficult, resulting in a large error.
AC coupling True RMS: RD701
When measurement is taken by true r.m.s., the measurement value of
input signal becomes the scales of the signal power and therefore
provide more effective values than those obtained by average value
detection. This multimeter imploys this true RMS circuit, which enables
measurement of sine wave and non-sinusoidal waves like square wave
and triangular wave in r.m.s.
Crest Factor
The crest factor (CF) is expressed by a value obtained by dividing the
peak value of the signal by its RMS value. Most common waveforms
such as sine wave and triangular wave have a relatively low crest
factor. The voltages and crest factors of typical waveforms are shown
in the table.
2π
――
τ
2π
――
τ
τ
2π
―― •Vp
Sine Wave
Square Wave
Triangular Wave
Puls
Input Waveform Peak
Vp
RMS
Vrms
Average
Vavg
CF
Vp/Vrms
Form Factor
Vrms/Vavg
VpVpVp 1 1
Vp
0
π2π
Vp
0π2π
Vp
0π2π
Vp
0τ2π
=1.414 Vrms =0.707 Vp=0.637 Vp =1.414 =1.111
=1.732 Vrms =0.577 Vp=0.5 Vp =1.732 =1.155
Vrms 2Vp
――
2
2 Vp
――
π2π
――
22
Vrms 3Vp
――
3
Vp
――
232
――
3
Vp
τ
2π
―― •Vp

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—8 —
NMRR (Normal Mode Rejection Ratio)
NMRR is the DMM's ability to reject unwanted AC noise effect,
which causes inaccurate DC measurements. NMRR is typically
specified in terms of dB (decibel). This series has a NMRR
specification of >60 dB at 50 and 60 Hz, which means a good
ability to reject the effect of AC noise in DC measurements.
CMRR (Common Mode Rejection Ratio)
Common mode voltage is voltage present on both the COM
and VOLTAGE input terminals of a DMM, with respect to
ground. CMRR is the DMM's ability to reject common mode
voltage effect, which causes digit rattle or offset in voltage
measurements. This series has a CMRR specifications of >60
dB at DC to 60 Hz in ACV function; and >120 dB at DC, 50 and
60 Hz in DCV function.

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The buzzer sounds?
Check continuty of test
leads
Main unit
and test leads
damaged?
Set the function to " ".
[5] MEASUREMENT PROCEDURE
5-1 Start-Up Inspection
START
Short the red and black
test pins.
No damaged
No problem.
Start measurement.
Yes
Stop using it and have
it repaired.
— 9 —
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.
CAUTION
Damaged
No

DRAWING No. RD700/701 06-1404 2040 6010
5-2-1 Voltage measurements
DC/ACV: Maximum rating input value 1000 VDC/AC
1) Applications
DCV: Voltage of the battery and DC circuit are measured.
ACV: Sine wave AC voltage such as lighting voltage is
measured.
2) Measuring ranges
DCV & ACV: 5 ranges from 400.0 mV to 1000 V
3) Measurement procedure
Connect the plug of black test lead to COM terminal and
plug of red test lead to V terminal.
Set the function switch to ' V ' or ' V '.
Apply the red and black test pins to the circuit to measure.
For measurement of DCV, 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.
For measurement of ACV, apply the red and black test
pins to the circuit to measure.
The reading of Voltage is shown in the display.
After measurement, release the red and black test pins from
the object measured.
Note:
1) AC 400.0 mV range selection is the manual operation
switching by RANGE button.
2) It may fluctuate the value when the input terminal is opened,
because the input impedance of DC/AC 400.0 mV range is
1000 M
Ω . But this is not malfunction and there is not
hindrance in measurement.
3) The accuracy is not specified from 0 to AC 10 mV (RD701:
0~AC 40 mV) when the function was set up to the ACmV
range.
4) The reading does not become 0 when the input terminal was
shorted. But this does not bring about the influence to
measurement.
—10 —
5-2 Voltage measurement / Frequency measurement
1. Never apply an input signal exceeding the maximum
rating input value.
2. Be sure to disconnect the test pins from the circuit when
changing the function.
3. Always keep your fingers behind the finger guards on the
probe when making measurements.
WARNING

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—11 —
5-2-2 Frequency measurement
1) Application
Frequency of an AC circuit is measured.
2) Measuring ranges
10.00 Hz to 1.000 MHz (Auto range)
3) Measurement procedure
Connect the plug of black test lead to COM measuring input
terminal and plug of red test lead to Hz measuring terminal.
Set the function switch to 'Hz'.
Apply the red and black test pins to an object to measure.
The reading of Voltage is shown in the display.
After measurement, release the red and black test pins from
the object measured.
Note: Operating input voltage: < 20 VAC rms.
Input Signal: Sine wave, or Square wave with duty cycle
40 %~70 %
Sensitivity : 10 Hz~20 kHz : > 0.9 Vrms
20 kHz~500 kHz : > 2.6 Vp or 1.9 Vrms
500 kHz~1 MHz : > 4.2 Vp or 3 Vrms
Update Rate: 2 per second nominal
[DCV Measurement]
[ACV Measurement]

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5-3 Adapter measurement
1) Applications
This function is to measure with optional clamp probe (CL-22
AD and CL33DC), and like.
It can measure with this function, if it is the probe like the
following.
Current clamp probe with 1 mV (Up to 400 mV) output per 1
A.
2) How to use
Connect the plug of black test lead or '-' to COM input
terminal and plug of red test lead or '+' to ADP input
terminal.
Set the function switch to 'ADP' and select either 'DC ' or
'AC ' by pressing the SELECT button.
Open the clamp part, have electric wire (one line) clamped,
and close the clamp part perfectly.
The reading is shown in the display. (1mV is indicated as 10
counts.)
In case of a current clamp probe with 1mV output per 1 A,
a display of '1000' counts on the display represents '100 A'.
After measurement, open the clamp part and release clamp
probe from the electric wire.
—12 —

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Clamp Probe Range Probe Output DMM Display Reading value
CL-22AD
CL33DC
DC 20 A*
DC 200 A
AC 20 A*
AC 200 A
DC 30 A*
DC 300 A
DC 15 mV
DC 150 mV
AC 15 mV
AC 150 mV
DC 25 mV
DC 250 mV
DC 0150
DC 1500
AC 0150
AC 1500
DC 0250
DC 2500
1.5 A
150 A
1.5 A
150 A
2.5 A
250 A
[Adapter (ADP) indication example]
*: This range is 1 mV output per 0.1 A.
—13 —

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5-4-1 Resistance Measurement
1) Applications
Resistance of resistors and circuits are measured.
2) Measuring ranges
6 ranges from 400.0 Ωto 40.00 M Ω.
3) Measurement procedure
Connect the plug of black test lead to COM input terminal
and plug of red test lead to Ωinput terminal.
Set the function switch to ' Ω///' and select 'Ω' by
pressing the SELECT button.
Apply the red and black test pins to an object to measure.
The reading is shown in the display.
After measurement, release the red and black test pins from
the object measured.
Note: If measurement is likely to be influenced by noise, shield
the object to measure with negative potential (COM).
If a finger touches a test pin during measurement,
measurement will be influenced by the resistance in the
human body to result in measurement error.
Open Circuit Voltage: <0.4 VDC typical
—14 —
5-4 Resistance measurement and Capacitance measurement /
Testing Diode / Checking Continuity
Never apply voltage to the input terminals.
WARNING

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—15 —
5-4-2 Checking Continuity
1) Application
Checking the continuity of wiring and selecting wires.
2) How to use
Connect the plug of black test lead to COM measuring input
terminal and plug of red test lead to measuring terminal.
Set the function switch at 'Ω///' and select ' ' with
the SELECT button.
Apply the red and black test pins to a circuit or conductor to
measure.
The continuity can be judged by whether the buzzer sounds
or not.
After measurement, release the red and black test pins from
the object measured.
Note: Threshold: between 20 Ωand 120 Ω.
Open Circuit Voltage: <0.4 VDC typical

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5-4-3 Testing Diode
1) Application
The quality of diodes is tested.
2) How to use
Connect the plug of black test lead to COM measuring input
terminal and plug of red test lead to measuring terminal.
Set the function switch at 'Ω///' and select ' ' with
the SELECT switch.
Apply the black test pins to the cathode of the diode and the
red test pin to the anode.
Check reading for judgment of good or defective.
A zero reading indicates a shorted diode (defective).
An 'OL' indicates an open diode (defective).
Apply the red test pins to the cathode of the diode and the
black test pin to the anode
The display shows 'OL', if diode is good. Any other
readings indicated the diode is resistive or shorted
(defective).
After measurement, release the red and black test pins from
the object measured.
Note: The input terminals release voltage is about <1.6 V.
—16 —

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1) Application
Measures capacitance of condensor.
2) Measuring ranges
5 ranges from 500.0 nF to 3000 µF (Auto range)
3) Measurement procedure
Connect the plug of black test lead to COM measuring input
terminal and plug of red test lead to measuring terminal.
Set the function switch to 'Ω///' and select ' ' by
pressing the SELECT button.
Apply the red and black test pins to an object to measure.
Read the value in the display.
After measurement, release the red and black test pins from
the object measured.
—17 —
5-4-4 Capacitance Measurement
1. Discharge the capacitance before measurement.
2. Due to the measurement method that this device pours the
current into a capacitor the measurement such as the big
electrolysis capacitor of a leakage current is not suited in order
that the error becomes big.
CAUTION