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GDM-400 & GDM-300

FEATURES:

GDM-452/357/350B
-  4 1/2 Digits 19999 counts (GDM-452), 3 1/2 Digits 1999 counts (GDM-357/350B)
- Manual Ranging, Continuity Beeper/Diode Test, Data Hold
- hFE Test (GDM-350B)
- Temperature Measurement (GDM-357/350B)
- Capacitance (GDM-452/357)
- Frequency Measurement (GDM-452)

GDM-461/397/360/398
- 22000 Counts Auto/Manual Ranging (GDM-461)
- 4000 Counts Auto/Manual Ranging (GDM-397/398)
- 6000 Counts Auto/Manual Ranging (GDM-360)
- Capacitance, Frequency Measurement
- Continuity Beeper/Diode Test
- High Energy Fuse for 10A Range
- Data Hold/Relative Mode
- True RMS (GDM-461/360)
- RS232C (GDM-461/397/360)

DESCRIPTION

The GDM-300/400 Series Hand Held DMM are a compact, high precision, battery operated multimeter series designed to meet most of the daily needs for design engineers as well as service engineers. The GDM-300/400 series design is driven by mobile-oriented features, such as automatic power down to preserve battery life, a large backlight display for crisp viewing, a rotary selector switch and clear-cut push buttons to ease operation. The basic functions match the depth of bench-top multimeters: fuse-protected current input, true RMS for accurate AC measurements, Auto ranging, Duty cycle, and Relative mode. These compact, reliable, and economical devices are ideal for any engineer.

SELECTION GUIDE

 

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MODEL

GDM-461

GDM-452

GDM-397

GDM-360

GDM-398

GDM-357

GDM-350B

Max. Display

22000

19999

4000

6000

4000

1999

1999

Auto Ranging

v

 

v

v

v

 

 

Analog Bar

v

 

v

v

v

 

 

True RMS

v

 

 

v

 

 

 

Display Backlight

 

 

v

v

v

 

 

Fused 10A Range

v

v

v

v

v

 

v

Auto Power off

 

v

v

v

v

v

 

DC Voltage

1000V

600V

1000V

1000V

1000V

600V

250V

AC Voltage

750V

600V

750V

750V

750V

600V

250V

DC Current

10A

10A

10A

10A

10A

10A

10A

AC Current

10A

10A

10A

10A

10A

10A

 

Resistance

220MO

20MO

40MO

60MO

40MO

20MO

20MO

Capacitance

220mF

20µF

4000µF

4000µF

4000µF

200µF

 

Frequency

220MHz

20kHz

10MHz

10MHz

10MHz

 

 

Diode

v

v

v

v

v

v

v

Continuity

v

v

v

v

v

v

v

Temperature

 

 

v

 

 

v

v

Duty Cycle(%)

v

 

v

v

v

 

 

Transistor (hFE)

 

 

 

 

v

 

v

EF Function

 

 

 

 

v

 

 

REL

v

 

v

v

v

 

 

Data Hold

v

v

v

v

v

v

v

Peak Hold

v

 

 

 

 

 

 

MAX MIN

 

 

v

v

v

 

 

RS232C

v

 

v

v

 

 

 

 

FEATURES

SPECIFICATIONS
DC VOLTAGE
Range 220mV, 2.2V, 22V, 220V, 1000V(GDM-461); 200mV, 2V, 20V, 200V, 600V(GDM-452) 40mV, 400mV, 4V, 40V, 400V, 1000V(GDM-397); 60mV, 600mV, 6V, 60V, 600V, 1000V(GDM-360) 400mV, 4V, 40V, 400V, 1000V(GDM-398) 200mV, 2V, 20V, 200V, 600V(GDM-357) 200mV, 2000mV, 20V, 200V, 250V(GDM-350B)
Best Accuracy ±(0.1%rdg + 2 digits) for GDM-461; ±(0.05%rdg + 3 digits) for GDM-452 ±(0.5%rdg + 1 digit) for GDM-397/360/398/357; ±(0.5%rdg + 2 digits) for GDM-350B
Input Impedance 10 MΩ (3000MΩ for mV range of GDM-461/397/360/398)
AC VOLTAGE
Range 220mV, 2.2V, 22V, 220V, 750V(GDM-461); 200mV, 2V, 20V, 200V, 600V(GDM-452) 40mV, 400mV, 4V, 40V, 400V, 750V(GDM-397); 400mV, 4V, 40V, 400V, 750V(GDM-398) 60mV, 600mV, 6V, 60V, 600V, 750V(GDM-360); 2V, 20V, 200V, 600V(GDM-357) 200V, 250V(GDM-350B)
Best Accuracy ±(0.8%rdg + 10 digits) for GDM-461; ±(0.5%rdg + 10 digits) for GDM-452 ±(1.0%rdg + 3 digits) for GDM-397/360/398; ±(0.8%rdg + 3 digits) for GDM-357 ±(1.2%rdg + 3 digits) for GDM-350B
Input Impedance 10 MΩ (3000MΩ for mV range of GDM-461/397/360/398; 4.5MΩ for GDM-350B)
DC CURRENT
Range 220µA, 2200µA, 22mA, 220mA, 10A(GDM-461); 2mA, 20mA, 200mA, 10A(GDM-452) 400µA, 4000µA, 40mA, 400mA, 4A, 10A(GDM-397/398) 600μA, 6000μA, 60mA, 600mA, 6A, 10A(GDM-360) 2mA, 20mA, 200mA, 10A(GDM-357); 2000µA, 20mA, 200mA, 10A(GDM-350B)
Best Accuracy ±(0.5%rdg + 10 digits) for GDM-461; ±(0.5%rdg + 5 digits) for GDM-452 ±(1.0%rdg + 2 digits) for GDM-397/398/350B; ±(1.0%rdg + 3 digits) for GDM-360 ±(0.8%rdg + 1 digit) for GDM-357
AC CURRENT
Range 220µA, 2200µA, 22mA, 220mA, 10A(GDM-461); 2mA, 20mA, 200mA, 10A(GDM-452) 400µA, 4000µA, 40mA, 400mA, 4A, 10A(GDM-397/398) 600μA, 6000μA, 60mA, 600mA, 6A, 10A(GDM-360); 20mA, 200mA, 10A(GDM-357)
Best Accuracy ±(0.8%rdg + 10 digits) for GDM-461/452; ±(1.0%+3) for GDM-357 ±(1.2%rdg + 5 digits) for GDM-397/360/398
RESISTANCE
Range 220Ω ~ 220MΩ 7 ranges(GDM-461); 200Ω ~ 20MΩ 6 ranges(GDM-452/357/350B) 400Ω ~ 40MΩ 6 ranges(GDM-397/398); 600Ω ~ 60MΩ 6 ranges(GDM-360)
Best Accuracy ±(0.5%rdg + 10 digits) for GDM-461; ±(0.3%rdg + 1 digit) for GDM-452 ±(1.0%rdg + 2 digits) for GDM-397/360/398/357; ±(0.8%rdg + 5 digits) for GDM-350B
CAPACITANCE
Range 22nF, 220nF, 2.2µF, 22µF, 220µF, 2.2mF, 22mF, 220mF(GDM-461) 20nF, 200nF, 2μF, 20μF(GDM-452); 2nF, 20nF, 200nF, 2μF, 200μF(GDM-357) 40nF, 400nF, 4µF, 40µF, 400µF, 4000µF (GDM-397/360/398)
Best Accuracy ±(3.0%rdg + 5 digits) for GDM-461; ±(4.0%rdg + 20 digits) for GDM-452 ±(3.0%rdg + 5 digits) for GDM-397/360/398; ±(4.0%+3) for GDM-357
FREQUENCY
Range 10Hz ~ 220MHz(GDM-461); 1Hz ~ 20kHz(GDM-452) 10Hz ~ 10MHz(GDM-397/360/398);
Best Accuracy ±(0.01%rdg + 5 digits) for GDM-461; ±(1.5%rdg + 5 digits) for GDM-452 ±(0.1%rdg + 4 digits) for GDM-397/360/398
DIODE TEST
Open Circuit Voltage GDM-461/452/397/360/398/357/350B : 2.8V (Approx.) GDM-350B : 2.3V (Approx.)
CONTINUITY BEEPER
Buzzer sounds if conductance less than 10Ω for GDM-461/397/357/360/398/350B Buzzer sounds if conductance less than 30Ω for GDM-452
TEMPERATURE
Range -40ºC ~ 1000ºC
Best Accuracy ±(1.2%rdg + 4 digits) for GDM-397; ±(1.0%rdg + 7 digits) for GDM-357 ±(1.0%rdg + 3 digits) for GDM-350B
SPECIAL FUNCTION
Auto Ranging (GDM-461/397/360); True RMS (GDM-461/360); RS-232C (GDM-461/397/360) hFE Test (GDM-398/350B); Display Backlight (GDM-397/360/398); EF Function (GDM-398) Analog Bar (GDM-461/397/360/398); Auto Power Off (GDM-452/397/357/360/398)
LCD DISPLAY
22000 counts (GDM-461), 4 1/2 digits (GDM-452), 6000 counts (GDM-360) 3 3/4 digits (GDM-397/398), 3 1/2 digits (GDM-357/350B)
POWER SOURCE
Single 9V Battery (6F22)
DIMENSIONS & WEIGHT
87(W) x 180(H) x 47(D) mm, Approx. 370g (GDM-461/397/360/398) 91(W) x 186(H) x 39(D) mm, Approx. 300g (GDM-452/357) 72(W) x 137(H) x 35(D) mm, Approx. 200g (GDM-350B)

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