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
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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 —
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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