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  Home > Sanwa Products > Digital Multimeter > CD721, CD731, CD751
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More info:
Sanwa website
 
Digital Multimeter
CD721, CD731, CD751
Standard DMM with a large and easy-to-use LCD
* CD751 - True RMS


     
CD751 CD731 CD721

 
Standard Accessory:

Test lead ( TL-21 )
Holster ( H-70 )
Instruction manual
 
 
Optional Accessory:

Optional accessories
Clamp-on DC Current Probe ( 30/300A )
CL33DC with carrying case
Clamp-on AC-DC Current Probe ( 20/200A )
CL-22AD with carrying case
Clamp-on AC Current Probe ( 20/200A )
CL-20D Optional carrying case : C-CL
Carrying case : C-C7
High voltage probe ( HV-60 )
 
 
Features:







The holster to secure test leads comes as standard
The holster is made of tough elastomer and is thick enough to withstand shock in the roughest environments.  Secure the test lead in the holder provided on the left side to take measurements in locations where the unit cannot be put in place.  The holster is also designed for safety as it acts as a cover when storing the sharp, pointed pins.

Gold-plated test pin lead
Gold-plated test pin leads Gold-plated test pins remain strong despite changes over the years, which is why they are used.  While other types of metal plating may generate an insulating film due to corrosion, etc. during long term storage, gold plating has a low contact resistance and thereby gurantees stable contact.

Optional test lead : TL-21M
A 0.7-mm pin tip diameter enables contact with narrow parts such as a connector.
The sharp memory alloy returns to its original shape even after being bent.  The pin top is a screw replacement-type and includes a standard 2-mm diameter  gold -plated pin.

The reclining stand is convenient for desktop use
Provided with CD751 and CD731.




To prevent mishandling safety cover and cap
The 20A and 12A large current measurement terminals have and internal resistance of 0.005 ohm, so extremely low voltage placement must be avoided.  As a precaution, CD751 and CD731 come equipped with rotating covers.  Normally, the large current measurement terminal remains covered by means of a spring.  CD721 comes equipped with a cap instead.


 
 
General Specification:

Measuring method Dual integration
Display Counter approx. 3200 counts : Bar graph : 32 segments max.
Range selection Auto and manual ranges
Over display "O.L" mark indication
Polarity Automatic selection ( only "-" is displayed. )
Battery discharge If the internal battery has been consumed and the voltage drops, the display shows.
Sampling rate Approx. 2 times/sec ( numeral display )
Approx. 12 times/sec ( bar graph )
Accuracy assurance temperature / humidity range 18~28 oC 80% RH max. No condensation.
Operating temperature / humidity range 0~40 oC 80% RH max. No condensation.
Storage temperature / humidity range 10~50 oC 70% RH max. No condensation.
Power supply R6 * 2
Power consumption
CD751: Approx. 8mohm TYP ( at DCV )
CD731:
CD721:
Approx. 1.8mohm TYP ( at DCV )
Internal fuse
CD751:
CD731:
0.5A/250V Ф5.2 * 20mm Blowout capacity 300A
20A/250V Ф6.35 * 31.8mm Blowout capacity 1000A
CD721: 0.5A/250V Ф5.2 * 20mm Blowout capacity 300A
12A/250V Ф6.3 * 30mm Blowout capacity 500A
Dimension
CD751:
CD731:
CD721:
165.5(H) * 78(W) * 41.5(D)mm ( with holster )
157.5(H) * 70(W) * 32.5(D)mm ( without holster )
Weight
CD751: Approx. 315g  ( with holster )
CD731: Approx. 310g  ( with holster )
CD721: Approx. 290g  ( with holster )
Safety IEC 1010-1 overvoltage category III ( max. DC.AC 600V )
( EN61010-1 )
( Max. DC 1000V, AC750V overvoltage category II )
Accessories Instruction manual, Test lead ( TL-21 ), Holster ( H-70 )
 
 
Measurement Range And Accuracy:

DCV
Range

Accuracy

Input Resistance

320mV
(0.5%rdg+2dgt)

Approx. 100Mohm

3.2V
(0.9%rdg+2dgt)

Approx. 11Mohm

32V

Approx. 10Mohm

320V
1000V
ACV
Range
Accuracy
Input Resistance
Accuracy in the case of sine wave AC
3.2V
CD751:
(1.2%rdg+8dgt)
CD731/CD721:
(1.2%rdg+5dgt)
Approx. 11Mohm
CD751:
3.2V range:
40~500Hz
32V range up:
40~1kHz
CD731/CD721:
40~400Hz
32V

Approx. 10Mohm

320V
750V
 
 
Ohm
Range

Accuracy

Open Voltage

320ohm
(1.2%rdg+2dgt)
Approx. 1.3V
The measuring current changes according to the resistance of the resistance measure.
3.2kohm
32kohm
320kohm
3.2Mohm
(2.0%rdg+2dgt)
30Mohm
(5.0%rdg+2dgt)
DCA - CD751/CD731
Range

Accuracy

Input Resistance

32uA

(1.4%rdg+2dgt)
Approx. 5kohm

320uA

Approx. 500ohm

3200uA

32mA
Approx. 5ohm
320mA
20A*
(2.0%rdg+2dgt)
Approx. 0.005ohm
DCA - CD721
Range

Accuracy

Input Resistance

32mA
(1.4%rdg+2dgt)
Approx. 5ohm
320mA
12A*
(2.0%rdg+2dgt)*
Approx. 0.005ohm
ACA - CD751/CD731
Range

Accuracy

Input Resistance

Accuracy in the case of sine wave AC

32uA
CD751:
(1.8%rdg+10dgt)
CD731/CD721:
(1.8%rdg+5dgt)
Approx. 5kohm
CD751:
40~1kHz
CD731:
40~400Hz
320uA
Approx. 500ohm
3200uA
32mA
Approx. 5ohm
320mA
20A*
CD751:
(2.5%rdg+10dgt)
CD731/CD721:
(2.5%rdg+5dgt)
Approx. 0.005ohm
ACA - CD721
Range Accuracy Input Resistance Accuracy in the case of sine wave AC
32mA
(1.8%rdg+5dgt)
Approx. 5ohm
40~400Hz
320mA
12A*
(2.5%rdg+5dgt)
Approx. 0.005ohm
Continuity
Buzzer

Sounds at approx. 20ohm max.

  Open voltage : Approx. 1.3V
Diode Test
Open voltage: Approx. 3V
Battery Check - CD721 only


CD751/CD731 Maximum Overload Protection Input 
Function Input Max. rating input voltage Max. overload protection
DCV
ACV

V/Ohm/Continuity/Diode
uA/mA/COM

DC1000V
AC750V
DC1000V, AC750V
or PEAK MAX.1000V
Ohm/Continuity/Diode
Voltage and current input prohibited
DC, AC500V
or PEAK MAX.700V

DC/AC
32uA
DC/AC
32A
0.5A/250V
Fuse protected

DC/AC
320uA/3200uA

DC/AC
3200A

0.5A/250V
Fuse protected
DC/AC
32mA/320mA
DC/AC
320mA

0.5A/250V
Fuse protected
DC/AC20A
20A/COM
DC/AC20A
10sec.

20A/250V
Fuse protected
CD721 Maximum Overload Protection Input 
Function Input Max. rating input voltage Max. overload protection
DCV
ACV
V/Ohm/Continuity/Diode
uA/mA/COM
DC1000V
AC750V
DC1000V,AC750V
or PEAK MAX.1000V
Ohm/Continuity/Diode

Voltage and current input voltage

DC,AC500V
or PEAK MAX.700V
1.5V
DC2V

0.5A/250V
Fuse protected
DC/AC
32mA/320mA
DC/AC
320mA

0.5A/250V
Fuse protected
DC/AC12A
12A/COM
DC/AC12A
30sec.
12A/250V
Fuse protected
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