TVT-322 Dual Channel Milivoltmeter Double Needle Millivoltmeter New Design High Quality Pointer voltage measuring instruments

Features:
--Dual needle, solely and tracing measurement.
--Frequency: 5Hz--1MHz.
--AC Voltage: 300uV--100V, Max. (DC+AC300V).
--dB measurement:-70dB--+40dB.
--3600 revolving switch
--10Mohm input impedance.
--Internal grounding
--Observation of internal output.

Specifications:

Measuring range
Voltage:300µV-100V in 12 steps

dB:-70dB to +40dB

dBm:-80 to +52dBm (0dB=1Vrms, 0dBm=0.755V)

Measuring mode
traceable

Error
Within 3% at 1KHz, full scale

Frequency response
5Hz~1MHz:±10%

10Hz~500KHz::±5%

20Hz~200KHz::±3%

30Hz~100KHz::±2%

Readout at 1KHz as reference

Input impedance
10Mohm:±5%, 45pF

Max input voltage
500V(DC+AC peak) (within in 3V-100V)

300V(DC+AC peak)( within 300µV-1V)

Stability
±5% of full scale, at 10% variety of line voltage

Survival voltage
Less than 200µV at 1mV range and short-circuit of input

Cross-talk
Independent less than 80dB connecting 600ohm load

Consistent:less than 50dB connecting 600ohm load

Gain
60dB

Output voltage
0.1Vms±20% ai full scale without load

Output resistance
600ohm±20% at 1KHz

Distortion
Less than 1% at full scale

Signal to noise ratio
More than 30dB at 0.3mV range

Frequency response
5Hz~500KHz: within ±3%

ambient
10C~40C85% RH

Power supply
220V/110V±10% 50Hz/60Hz

Dimension
239*140*200mm

weight
About 3Kg