GW Instek GDM-8040 - Instek 3 3/4 Digit AC True RMS Digital Multimeter

• 0.5 LCD display with 42 segment Bar graph and back lighting
• Auto and Manu range operation
• 500V fuse rating on current ranges (20A range Option)
• Relative, MAX./MIN., Memory read and Data Hold
• Multi-functions, ACV, DCV, ACA, DCA, R, C, Hz, Continuity Beeper and Diode Test
• Auto power off function at battery mode
• Built-in charger with NI-CAD batteries (Option BP-01)
• AC True RMS

• 0.5 LCD display with 42 segment Bar graph and back lighting
• Auto and Manu range operation
• 500V fuse rating on current ranges (20A range Option)
• Relative, MAX./MIN., Memory read and Data Hold
• Multi-functions, ACV, DCV, ACA, DCA, R, C, Hz, Continuity Beeper and Diode Test
• Auto power off function at battery mode
• Built-in charger with NI-CAD batteries (Option BP-01)
• AC True RMS

DC Volts

Range	Resolution	Accuracy
± 400mV	100uV	±(0.1% of reading + 2 digits)
± 4V	1mV	±(0.1% of reading + 1 digits)
± 40V	10mV	±(0.1% of reading + 1 digits)
± 400V	100mV	±(0.1% of reading + 1 digits)
± 1000V	1V	±(0.1% of reading + 2 digits)

• Normal mode rejection ratio : >50db at 60hz or 50hz.
• Common mode rejection ratio : >90db at dc, 50hz or 60hz (1k° unbalanced)
• response time to rated accuracy : 1 second maximum.
• Maximum input : 1000v dc or peak ac continuous.
• Ranging : auto / manu

 

AC Volts

Range	Resolution	Accuracy ±(% of reading + no. of digit)
		40Hz	70Hz	500Hz	5KHz	10KHz	20KHz	50KHz
400mV	100µV	1%+5d**		--
4V	1µV	0.5% + 3				2% + 10**		5% + 20 **
40V	10µV
400V	100µV					2% + 10**	--
750V	1V	0.5% + 3			--

 

DC Current

Range	Resolution	Accuracy	Burdon Voltage
4mA	1µA	±(0.2% of reading + 2d)	0.5V max
40mA	10µA
400mA	100µA
2A	lmA	±(0.7% of reading + 3d)	1.2V max
20A	10mA

 

• Maximum Input
  • ma : 4ma, 40ma, 400ma, 2a 4 ranges with a 2a 250v and a 4a 500v  fuse protection. 
  • 20a : 10a dc or ac rms continuous, 20a dc or ac rms for 15 seconds  maximum. Protected with a 20a 500v fuse.(option) 
• ranging : auto / manu

AC Current

Range*	Resolution	Accuracy			Burdon Voltage
		40Hz	1KHz	5KHz
4mA	1µA	0.7% + 3d	2% + 5d		0.5V max
40mA	10µA	0.7% + 3d	2% + 5d		0.5V max
400mA	100µA	0.7% + 3d	2% + 5d		0.5V max
2A	1mA	1% + 5d	--		1.2V max
20A	10mA	1% + 5d	--		1.2V max

• Maximum Input
• mA : 4mA, 40mA, 400mA, 2A 4 ranges with a 2A 250V and a 4A 500V fuse protection.
• 20A : 10A do or ac rms continuous, 20A dc or ac rms for 15 seconds maximum. Protected with a 20A 500V fuse.(option)
• RANGING : AUTO / MANU

* : Accuracy are specify above 10% of full scale reading.

 

Resistance

Range	Resolution	Accuracy	Maximum Open Voltage Through The Unknown
400Ω	100mΩ	±(0.5%+ 3d)	0.5 Volts maximum
4KΩ	1Ω	4--(0.5%+ 2d)
40KΩ	10Ω
400KΩ	100Ω
4MΩ	1KΩ	±( 1% + 2d)
40MΩ	10KΩ	±( 2% + 3d)

• Input Protection: 500V DC or peak AC on all ranges.
• Ranging: Auto/Manu

 

Capacitance

Range	Resolution	Accuracy for 1-year(note 2)
4nF*	1pF	±(5% of reading + 5 digits)
40nF*	10pF	±(2% of reading + 2 digits)
400nF	100pF
4µF	1nF
40µF	10nF

• Input Protection : 500V dc or peak on all ranges.
• Ranging    : AUTO / MANU

note 2: 4nF and 40nF must be using relative.
* : Specify for without test lead.

 

Frequency

Range	Resolution	Accuracy*	Sensitivity
100Hz	.01Hz	±(0.1% + 2d)	100mV
1KHz	.1Hz		100mV
10KHz	1Hz		100mV
100KHz	10Hz		200mV
> 100KHz	100Hz		500mV

• Frequency Range : > 5Hz to < 1MHz
• Input Protection : 500V dc or peak ac on all ranges.
• Ranging : AUTO ONLY.

* : The accuracy are not specify with trigger error. 

 

Diode Test

Test Current

Approximately 0.7mA measuring a forward-biased junction.

Continuity Test

Sound Indication	<40Ω
Response Time	60mS Approx.
Open Loop Voltage	< 3 Volts

General

Other Functions	Temperature test, Minimum Hold, Maximum Hold, Data Hold, Relative, Function-Range-Data Memory/Read(recall).
Display	0.5" LCD display and 42 Segement BAR with back lighting.
Back Lighting	Push the " BL " button to turn on the back light.
Temperature Coefficient	< 0.1 times the applicable accuracy specification per °C for O°C to 18°C and 28°C to 50°C.
Operating Temperature	0°C to 50°C
Storing Temperature	-20°C to 65°C
Relative Humiity	Up to 90%, 0°C to 35°C, Up to 75%, 35°C to 50°C.
Auto Range	Range up : FREQ > 9999 counts, other function > 3999 counts Range down : FREQ < 900 counts, other function < 380 counts
Maximum Common Mode Voltage	500VDC or peak AC.
Sample Rate	2 sample/second for digital display. 20 sample/second for bar display.
Power Requirements	AC 110V,220V±15%,50/60Hz NI-CD(1.3V 2/3AA x 6) :200 hours (options)
Dimensions & Weight	230(W) x 95(H) x 280(D), 1.8Kg approx.
Accessories	Test Lead GTL-106, Instruction Manual, 2A Spare Fuse x 1.

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