CD800b - Sanwa Electric Instrument Co., Ltd.

CD800b - Sanwa Electric Instrument Co., Ltd.
1. Correct measurement may not be performed when using the meter in a
ferromagnetic/intense electric field such as a place near a transformer,
high-current circuit or a radio.
2. The meter may malfunction or correct measurement may not be performed
when measuring a special waveform such as that from an inverter circuit.
1-3 Overload protections
Max. rated input value
AC 600 V
DC 600 V
Input terminals
+ (Red)
- (Black)
Max. overload protection input
AC/DC 660 V
AC/DC 600 V
Voltage input prohibited
0.6 A/600 V fuse
breaking capacity 10 kA
2-1 Applications
This instrument is a digital multimeter with rms value response, designed for
measurements within the range specified as CAT.IV 300 V / CAT.III 600 V in
2-2 Features
• Safety design compliant to IEC61010.
• AC measurements with True RMS conversion.
• High portability thanks to the case-integrated design.
• Backlight.
Measurement categories (Overvoltage categories)
CAT. II : Primary circuit of equipment with a power cord to be connected to a
mains socket.
CAT. III : Primary circuit of equipment that inputs power directly from the
distributor and the circuit from the distributor to the mains socket.
CAT. IV : Circuit from the leading wire to the distributor.
Dempa Bldg., 4-4 Sotokanda 2-Chome
Chiyoda-ku, Tokyo 101-0021, Japan
01-1611 2040 6006
Before use, read the following safety precautions.
This instruction manual explains how to use your new digital multimeter CD800b
safely. Before use, please read this manual thoroughly. After reading it, keep it
The meaning of the symbols used in this manual and attached to the product is
as follows.
: Very important instructions 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.
Symbols attached to the product
: Symbol soliciting reference to this manual before use
: Double or enhanced insulation
: Ground : Resistance
: Diode
: Buzzer
: Capacitance
: Backlight
: Fuse
3-1 Multimeter and test leads
Test pins
Removable test pin covers
View when not attached
HOLD button
△ REL button
Finger guards
Removable test pin covers
When covered: CAT.IV 300 V
When uncovered: CAT.II 600 V
Test probe (red)
SELECT button
RANGE button
Test probe (black)
Power/function switch
3-2 Display
0.000 - 3.000 V
Open voltage across input terminals: About 3.2 V
“OL” is displayed at 3.000 V or more.
Forward test
: Voltage alarm
: Data Hold indicator
: Auto Range indicator
: Low battery indication
: Auto Power Save indicator
: Relative operation indicator
: Continuity check : Diode
: Capacitor
: Alternative Current : Direct Current : MAX/MIN mode indicator
3-3 Attaching the strap
Hand strap
1. This section is very important for safety. Read and understand the
following instruction fully and maintain your instrument properly.
2. The instrument must be calibrated and inspected at least once a year to
maintain the safety and accuracy.
Example of Good item:
“OL” display
Example of NG item:
Other display
6-1 Maintenance and inspection
1) Appearance
• Is the appearance not damaged by falling?
2) Test leads
• Is the cord of the test leads not damaged or the core wire not exposed at
any place of the test leads?
0.0 - 600.0 Ω
Open voltage across input terminals: About 1.0 V
If any of the above is found with the appearance, do not use the equipment
and have it repaired.
The buzzer beeps at 10 to 50 Ω or less.
6-2 Calibration
The manufacturer may conduct the calibration and inspection. For more
information, please contact the dealers.
6-3 Cleaning and storage
1. The main unit is not resistant to volatile solvent and must not be cleaned
with lacquer thinner or alcohol. If it gets dirty, wipe lightly with a soft cloth
moistened with a small amount of water.
2. The main unit is not resistant to heat. Do not place it near a source of high
3. Do not store the instrument in a place where it may be subjected to
excessive vibrations or from where it may fall.
4. For storing the instrument, avoid hot, cold or humid places or placed
under direct sunlight or where condensation is anticipated.
5. When the instrument is not to be used for a long period, be sure to
remove batteries from it.
0.00 - 600.0 μF
60.00 n/600.0 n/6.000 μ/60.00 μ/600.0 μ
6-4 Battery and fuse replacement
Discharge the capacitor before
It takes a while to measure large
This measurement is not suitable for
measurement of a capacitor with a
high leak current such as an
electrolytic capacitor.
5-5 AC current measurement/DC current measurement (ACmA/DCmA)
1. Never apply voltage to the input terminals.
2. Do not apply an input exceeding the maximum rated current to the input
3. Be sure to connect the meter in a series connection via the load.
Power source
Power source
7-1 Warranty and provision
0.00 - 600.0 mA
60.00/600.0 mA
0.00 - 600.0 mA
60.00/600.0 mA
Input resistance: About 1 Ω (excluding fuse resistance). ACmA accuracyassured frequencies: 45 Hz to 1 kHz.
− 5 −
① Using a Phillips screwdriver, turn
the battery lid retaining screw
(x1) until it becomes loose.
② Press the position marked PUSH
to lift the battery lid, and then
remove it.
③ Replace the batteries by taking
care of the polarity. Alternatively,
replace the fuse if required.
④ Attach the battery lid and tighten
the retaining screw.
Incorrect measurement
When the SELECT button is held depressed (for more than 2 sec.), the backlight
of the LCD turns on. Holding the same button depressed again turns it off. The
backlight also turns of automatically in about 30 seconds.
4-6 Range Hold : RANGE button
5-2 AC voltage measurement (ACV), frequency measurement (Hz)
0.005 ~ 600.0
10.00 ~ 99.99 k
6.000/60.00/600.0 V
99.99/999.9/9.999 k/99.99 kHz
The accuracy-assured frequencies of the ACV measurement are 45 Hz to 500
Hz (sine wave AC).
Hz input sensitivity : 10.00 to 9.999 kHz: ≥1 Vrms. 10.00 kHz or more: ≥5 Vrms.
Press the RANGE button momentary to set the manual range mode (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 and hold the button for 1
sec. or more (then ‘AUTO’ is shown).
Manual range hold mode is not available in the Hz, , and functions.
When the △ REL button is held depressed, the meter enters the MAX/MIN
mode, in which the measurement range is fixed and the Auto Power Save and
Relative value measurement functions are canceled.
• Every time the SELECT button is pressed, the displayed information changes
as follows : Current measurement display (MAX MIN displayed) → MAX value
display (MAX displayed) → MIN value display (MIN displayed) → Current
measurement display (MAX MIN displayed) → …
• Current measurement display : The meter stores the maximum and minimum
values while displaying the current measurement value. The buzzer beeps
every time a value is updated. The maximum and minimum values can be
checked by pressing the button to view the MAX value display and MIN value
display. To cancel the MAX/MIN mode, press the button for 1 sec. or more.
• MAX value display : Maximum value measured since the entry in MAX/MIN
• MIN value display : Minimum value measured since the entry in MAX/MIN
The MAX/MIN mode can also be entered when the relative value measurement
function is active ( △ displayed). In this case, the MAX/MIN mode displays the
relative values assuming that the value at the moment the button is pressed is 0
(reference value).
MAX/MIN memory mode is not available in the Hz, , and functions.
* The MAX/MIN mode is canceled when the function or range is switched.
When the HOLD button is pressed, the current display is hold (
on the display). The display will not be changed even when the input varies
thereafter. Press the button again to cancel the Data Hold mode (
on the
display disappears).
* The Data Hold mode is also canceled when the function switch is switched or
the RANGE or SELECT button is pressed.
Set the function switch to ACV.
Each press of the SELECT button
alternates ACV and Hz.
appears on the display when a
voltage of 20 V or more is input.
At the moment the input exceeds 20 V,
the buzzer beeps and the backlight
flashes to indicate it.
5-3 DC voltage measurement (DCV)
0.0 m ~ 600.0
600.0 m/6.000/60.00/600.0 V
Set the function switch to DCV.
appears on the display when a
voltage of 20 V or more is input.
At the moment the input exceeds 20 V,
the buzzer beeps and the backlight
flashes to indicate it.
5-4 Resistance ( ), diode (
), continuity (
Set the function switch to
Each press of the SELECT button switches the function in order of
→ → …
5-4-1 Resistance measurement (
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,
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
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
− 6 −
1) Prior to requesting repair, please check the following:
• Capacity of the built-in batteries and polarity of installation.
• Discontinuity of the test leads.
• Functioning of the fuse (if it is now blown).
2) Repair during the warranty period:
The failed meter will be repaired in accordance with the conditions stipulated
in 7-1, Warranty and provision.
3) Repair after the warranty period has expired:
• When the original functionality is expected to be restored by repair, we will
repair the product upon request and payment by the customer.
• 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 six (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.
• Clearly mark “Repair Product Enclosed” on the box surface.
• The cost of sending and returning the product shall be borne by the customer.
600.0/6.000 k/60.00 k/600.0 k/6.000 M/60.00 MΩ
The open voltage across the measurement terminals is about DC 1.2 V.
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, and that results in
measurement error.
− 4 −
Safety standards
IEC61010-1, IEC61010-2-030, IEC61010-2-33, IEC61010-31
CAT.IV 300 V/ CAT.III 600 V
EMC Directive, RoHS
IEC61326 (EMC), EN50581 (RoHS)
Instruction manual, “AAA”-size alkaline battery x 2, hand strap
8-2 Optional accessory
Hanger magnet: HM-1
8-3 Measurement ranges and accuracies
Accuracy-assured temperature/humidity ranges: 23±5 ºC, ≤ 80 %RH, no
rdg: reading.
dgt: digits (lowest digits)
As the ACV and ACmA measurements employ the rms value response, the
accuracy-assured ranges and crest factor become as follows.
Accuracy range: 1 % to 100 % of measurement range.
Crest factor CF: Full scale CF < 1.8, half scale CF < 3.6.
AC voltage
6.000 V
± (1.2 %rdg+9 dgt)
60.00 V
600.0 V
± (1.2 %rdg+5 dgt)
DC voltage
99.99 kHz
600.0 mV
Input resistance: About 10 MΩ
999.9 Hz
9.999 kHz
6.000 V
60.00 V
± (0.5 %rdg+3 dgt)
± (0.8 %rdg+3 dgt)
600.0 V
600.0 Ω
6.000 kΩ
60.00 kΩ
± (1.2 %rdg+5 dgt)
600.0 kΩ
6.000 MΩ
± (2.0 %rdg+ 5 dgt)
60.00 MΩ
± (4.0 %rdg+ 5 dgt)
△ - Σ method
Open voltage: About DC 1.0 V
Buzzer beep generated at 10 to
50 Ω or less.
60.00 nF
600.0 nF
AC detection method
True RMS method (AC coupling)
Max. 6000 counts
60.00 μF
Sampling rate
Max. approx. 5 times/sec.
600.0 μF
Over load indication
“ OL” mark indication on digital display
Auto and Manual
Polarity switching
Auto (“-” indicated when negative voltage is input)
Low battery indication
mark displayed when battery voltage drops at 2.3 V or less.
Operating environmental
Altitude ≤2000 m, indoor use, pollution degree II
Operating temperature/
humidity ranges
-10 ºC to 40 ºC.
Humidity range is as follows (without condensation):
Max. 80 %RH at 5 ºC to 31 ºC, decreasing linearly to 50 %RH at
40 ºC.
Storage temperature/
humidity range
-20 ºC to 40 ºC: ≤80 %RH (without condensation).
40 ºC to 50 ºC: ≤70 %RH (without condensation).
(Batteries should be removed when the instrument is not to be
used for a long period.)
Temperature coefficient
Below 18 ºC and above 28 ºC: Accuracy x 0.15 should be added
per ºC. (Accuracy x 0.25 should be added in the
Power supply
LR03 (“AAA”-size alkaline battery)1.5 V × 2
Auto Power Save
Power Save in about 15 minutes after last operation. Typ. 20 µA
Current drain
About 1.5 mA (backlight off). max. about 38 mA
Battery life
About 600 hours (backlight off)
600 mA/600 V, φ 6.3 x 32 mm
Breaking capacity 10 kA (ceramic tube fuse)
(part number : F0325)
Dimensions & mass
166 (H) x 100 (W) x 43 (D) mm, about 360 grams (incl. batteries)
Test lead length
About 0.8 m
− 7 −
AC current
DC current
• Open voltage: About DC 1.8 V
• Measurement current varies
depending on the resistance
value of the object measured.
Open voltage: About DC 3.2 V
“OL” displayed at 3.000 V or
Diode test
Continuity check
Range selection
Input resistance: About 10 MΩ
• Accuracy-assured
frequencies: 45 Hz – 500 Hz
Input resistance: About 10 MΩ
• Accuracy not assured below
10 Hz.
• Sensitivity 10 Hz: ≥ 1 Vrms
10 kHz: ≥5 Vrms
99.99 Hz
8-1 General specifications
Operation method
0.0 ~ 60.00 MΩ
7-3 SANWA web site
E-mail: [email protected]
When the meter is switched on while holding the △ REL button displayed, the
display shows
for 2 seconds and the buzzer beep is canceled. Even when
the buzzer is canceled, it still beeps in the case of OL alarm, in the continuity
check, when the meter is turned on and before Auto Power Save. To enable all
of the buzzer sounds, turn the meter off then on again.
* This mode cannot be used when the Auto Power Save function is canceled.
Customers are asked to provide the following information when requesting
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 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 those information will be returned to the
7-2 Repair
) , capacitance (
• Never apply voltage to the input terminals.
4-10 Disable Buzzer
1.If the rear case or the battery lid is removed with input applied to the input
terminals, you may get electrical shock. Before starting the work, always
make sure that no input is applied.
2.Before starting the work, be sure to turn OFF the main unit power and
release the test leads from the circuit.
3. 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.
Correct measurement
4-5 Backlight : SELECT ( ) button
Check the following items before starting the daily measurement work.
• Appearance check : Check the appearance of the meter to see if it is free
from damage caused by falling, etc.
• Accessory : Check that the test leads are free from irregularities such as
wire disconnection and crack.
• Battery: Install the battery before using the meter for the first time. Ensure
low battery indication is not displayed and, if it is displayed,
that the
replace the battery with new one. If nothing is displayed, the battery may be
exhausted totally (see 6-4).
• Test lead wire disconnection can be checked by setting the function switch
to and shorting the test pins.
• Also check that the meter and your hands are not moistened by water, etc.
− 3 −
Note : As the internal resistance of the current range comes in series, the current
measured in the current measurement drops accordingly. This influence
becomes important in a circuit with low resistance.
Reverse test
Example of Good item:
Forward voltage
drop display
Example of NG item:
0.000 V display,
“OL” display
5-4-4 Capacitance measurement (
When the SELECT button is pressed, the functions change as follows.
ACV position : ACV → Hz → ACV → …
position : → → → → → …
mA position : AC mA → DC mA → AC mA → …
5-1 Start-up inspection
Insert the hand strap into the strap hole as
shown in the figure.
4-4 Measurement function selection : SELECT button
4-9 Data Hold : HOLD button
Set the function switch to mA.
Each press of the SELECT button alternates ACmA and DCmA.
5-4-3 Continuity check (
4-3 Low battery indication
− 2 −
The Auto Power Save function turns the display off automatically in about 15
minutes after the last operation or after an input of 20 V or higher was applied to
save the power consumption. To return from this status, press the SELECT or
RANGE button or turn the power switch to OFF then to another position.
To disable the Auto Power Save function, switch the meter on by turning the
function switch while holding the SELECT button depressed. A short buzzer
beep is generated, “
” is displayed for 2 seconds, and the
* A small current flows inside the meter even in the Auto Power Save status.
After measurement, always turn the function switch to the OFF position.
4-8 MAX/MIN memory : △ REL (MAX/MIN) button
Strap hole
− 1 −
5-4-2 Diode test (
4-2 Auto Power Save
1. Never apply an input signal exceeding the maximum rating input value of
each function.
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.
4. After measurement, release the red and black test pins from the object
measured and set the function switch to the OFF position.
When the △ REL button is pressed, △ appears on the display, the measuring
range is fixed and the display shows the relative values assuming that the value
at the moment the button is pressed is 0 (reference value). When the button is
pressed again, △ disappears and the relative value measurement is canceled.
Relative value measurement mode is not available in the Hz,
1-1 Explanation of Warning Symbols
To ensure the instrument is used safely, be sure to observe the instruction
when using the instrument.
1.This instrument is a digital multimeter for metering low voltages. Never
use it on electric circuits that exceed CAT.IV 300 V or CAT.III 600 V.
2.Pay special attention when measuring the voltage of AC 33 Vrms (46.7 V
peak) or DC 70 V or more to avoid injury.
3.Never apply an input signal exceeding the maximum rating input value (see 1-3).
4.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.
5.Never use meter if the meter or test leads are damaged or broken.
6.Never use uncased meter or the meter without the lid.
7.Always keep your fingers behind the finger guards on the probe when
making measurements.
8.Be sure to disconnect the test pins from the circuit when changing the function.
9.Before starting measurement, make sure that the function and range are
properly set in accordance with the measurement.
10.Never use meter with wet hands or in a damp environment.
11.Never open tester case except when replacing batteries or fuse.
Do not attempt any alteration of original specifications.
12.To ensure safety and maintain accuracy, check the meter in the start-up inspection
as well as in the inspection/calibration to be performed at least once a year.
13.The meter is for indoor use only.
14.Wear insulating protective gear when using the meter with equipment containing a
hazardous live part. Also be sure to observe your local and national safety rules.
15.Always use the meter in a specified method to prevent the protective
function from being imperiled.
Turn this switch to turn on and off the power and to switch the measuring
4-7 Relative value measurement : △ REL button
together with the product for reference to it when necessary.
If you use the product in a method not specified in this manual, the protection
function of the product may be imperiled.
The instruction given under the heading of “ WARNING” and “ CAUTION” must be
followed to prevent accidental burn or electrical shock.
1-2 Warning Instructions for Safe Use
4-1 Power/Function switch
When the batteries are exhausted until the supply voltage drops below about
2.3 V, the
indicator lights on the display. Replace the batteries when this
indicator appears.
± (3.0 %rdg+10 dgt)
6.000 μF
± (5.0 %rdg+10 dgt)
60.00 mA
600.0 mA
60.00 mA
600.0 mA
± (1.6 %rdg+5 dgt)
± (1.2 %rdg+5 dgt)
Auto range only.
Accuracy with a capacitor with
low leak current such as a film
capacitor or equivalent.
Less than 10 nF add +15 dgt to
the accuracy.
Input resistance: About 1 Ω
(excluding fuse resistance)
Accuracy-assured frequencies:
45 Hz to 1 kHz
Input resistance: About 1 Ω
(excluding fuse resistance)
Accuracy calculation method
Example) AC voltage measurement (ACV)
Displayed value: 100.0 V
Range accuracy: 600.0 V range ± (1.2 %rdg + 5 dgt) added to accuracy above.
Error: ±(100.0 V x 1.2 %rdg + 5 dgt) = ±1.7 V
True value: 100.0 V ±1.7 V (between 98.3 - 101.7 V)
* In the 600.0 V range, 5 dgt corresponds to 0.5 V.
Specifications and external appearance of the product described
above may be revised for modification without prior notice.
− 8 −
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