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產(chǎn)品描述：

4000-count LCD display

Basic accuracy 0.1% V DC

Voltage measurement up to 1000V DC, 750V AC

Current measurement up to 20A

Resistance measurement up to 40Mohms

Frequency and capacitance measurement

Temperature measurement

RS-232 interface

Safety: IEC 1010 600V CAT III

Specifications	Model 390A
Volts
DC Ranges	400 mV, 4V, 40V, 400V, 1000V
AC Ranges	400 mV, 4V, 40V, 400V, 750V
Resolution	100uV, 1 mV, 10 mV, 100 mV, 1 V
DC Accuracy	+-(0.1% rdg + 2 dgt)
AC Accuracy	400 mV: +- (1.2% rdg + 5 dgt)
	50 Hz - 100 Hz
	+-(1.0% rdg + 3 dgt) 50 Hz - 500 Hz
Overload Protection	1100 VDC or AC rms
Input Impedance	400mV: > 100MΩ, 4V: 10 MOhm
Current
Ranges	400 uA, 4 mA, 40 mA, 400 mA, 20A*
Resolution	0.1 uA, 1 uA, 10 uA, 100 uA, 10 uA
DC Accuracy	400 uA - 400 mA: +-(1% rdg + 5 dgt) 20 A: +- (2% rdg + 3 dgt)
AC Accuracy	400 uA to 400 mA: +-(1.5% rdg + 4 dgt) 20A: +-(2.5% rdg + 4 dgt.)
Input Protection	uA/mA Input: 0.5A/500V fast blow ceramic fuse 20A input: 20A/600A fast blow ceramic fuse
Max. Burden Voltage	500mV (2V on 4mA, 400mA ranges)
Resistance
Ranges	400 Ω, 4 kOhm, 40 kOhm, 400 kOhm, 4 MOhm, 40 MOhm
Resolution	100 mΩ, 1 Ohm, 10 Ohm, 100 Ohm, 1 kOhm, 10 kOhm
Accuracy	400 Ω to 400 kOhm: +-(0.5% rdg + 4 dgt.) 4 MΩ: +-(1% rdg + 5 dgt.) 40 MΩ: +-(2% rdg + 5 dgt.)
Open Circuit Voltage	-0.45 VDC typ. (-1.2 VDC on 400 Ω range)
Overload Protection	500 VDC or AC rms
Diode Test	Tested at 1.2 mA, 3.0 VDC max. typ. +-(1.5% rdg + 3 dgt.) accuracy
Transistor Test (hFE)	Does not apply
Capacitance
Ranges	4 nF, 40 nF, 400 nF, 4 uF, 40 uF, 400 uF, 4 mF, 40 mF
Resolution	1 pF, 10 pF, 100 pF, 1 nF, 10 nF, 100 nF, 1 uF, 10 uF
Accuracy	4 nF: +-(3% rdg + 20 dgt.) 4 nF to 40 uF: +-(3% rdg + 5 dgt.) 400uF to 40 mF: +-(5% rdg + 10 dgt.)
Test Voltage	< 1V
Overload Protection	500 VDC or AC rms
Frequency
Ranges	4 kHz, 40 kHz, 400 kHz, 4 MHz, 40 MHz
Resolution	1 Hz, 10 Hz, 100 Hz, 10 kHz, 100 kHz
Accuracy	+-(0.1% rdg + 3 dgt.)
Sensitivity	1 Hz - 4 MHz: 1V rms 4 MHz-40MHz: > 2V rms, <5V rms
Minimum Pulse Width	> 25 ns
Duty Cycle Limits	> 30% & <70%
Minimum Input Range
Overload Protection	500 VDC or AC rms
Logic Test
Logic Threshold	Does not apply
Frequency Response
Pulse Width
Pulse Limits
Indication
Overload Protection
Temperature
Range, Resolution	-58 0 to +2372 0 F, 1 0 F (-50 0 to +1300 0 C)
Accuracy	+-(0.8% rdg + 2 0 C) -50 0 - 400 0 C +-(1% rdg + 2 0 C) 400 0 - 1300 0 C)
Duty Cycle
Range, Resolution	Does not apply
Accuracy (5V logic)
Minimum Pulse Width
Frequency Range
Overload Protection
General
Display	4000 count, 3 3/4 digit LCD with 41 segment analog bar graph
Polarity	Automatic, positive implied, negative polarity indication
Operating Temperature	32 0 to 122 0 (0 0 to 50 0 C), 0 to 70% R.H.
Dimensions (HxWxD)	7.8x3.5x1.57 (198x90x40 mm)
Weight	11.3 oz. (320g)
Three Year Warranty
Accessories
SUPPLIED: 9V Battery, Test Leads, Instruction Manual, Thermocouple Probe (Model 390) OPTIONAL: TL-2A Deluxe Test Leads, TL-3 Accessory Tip Kit (for TL-2A), PR-28A High Voltage Probe (40kVDC), TL-130A General Purpose DMM Kit Carrying Case (not included): LC-29B
*10 A continuous, 20A for 30 seconds max.