GRAPHTEC WR300 - 6.3 Plug-in Amplifier Specifications

6-6
Specifications
6.3 Plug-in Amplifier Specifications
WR3-V Amplifier (for voltage measurement) Specifications
Item Details
No. of channels 2 channels per unit
Input configuration Independent unbalanced input for each channel (floating ground)
Input resistance 1 MΩ ±1%
Input coupling AC, DC, GND, CAL, (1/2 F.S.), OFF
Measurement range 50, 100, 200, 500 mV/F.S.
1, 2, 5, 10, 20, 50, 100, 200 V/F.S.
Input filters Line: 1.5 Hz (–3 dB) at –6 dB/oct
Low-pass : 5 Hz, 10 Hz, 50 Hz, 500 Hz, 5 kHz, 50 kHz (–3 dB) at –6 dB/oct
Accuracy (23±3°C) ±0.25% of F.S.
Temperature coefficients Zero point: 0.02% of F.S. /°C
Gain: 0.02% of F.S. /°C
Insulation resistance 100 MΩ (at 500 V DC)
Isolation voltage Between input terminal and casing: 1 minute at 1,000 V AC
Permissible signal source resistance Max. 1 kΩ
A/D converter Sampling interval: 1 µs
A/D resolution: 12 bits
Common mode rejection ratio 80 dB (typ) (50/60 Hz, Signal source resistance: max. 500Ω)
Signal/noise ratio –46 dB (typ) 200(Vp-p at 50 mV range (with +/– shorted)
Frequency response DC coupling: DC to 200 kHz (+/–3 dB Typ.)
AC coupling: 10 Hz to 200 kHz (+1/–4.5 dB Typ.)
Max permissible input voltage Between +/– terminals: 5 V to 200 V range : 200 V DC (DC + ACp-p)
50 mV to 2 V range: 30 V DC (DC + ACp-p)
Between input terminals and GND: 33 V AC rms
Input terminal type BNC