Checks and Preparation
2-7
2.6 Amplifier Part Names and Functions
This section describes the various amplifiers that can be installed in the WR300/310, with details of the
signal input cable connections.
The following five different amplifier types are available.
• V amplifier: for voltage measurement (WR3-V AMP)
• M amplifier: for voltage and temperature measurement (WR3-M AMP)
• DCB amplifier: for strain measurement (WR3-DCB AMP)
• FV amplifier: for frequency measurement (WR3-FV AMP)
• Logic amplifier: for logic measurement
V amplifier
This section describes the V amplifier and how to connect the input signal cable. The V amplifier is used for
voltage measurement.
33VACrms
(70Vp-p max.)
200Vp-p max.
Ranges
Up to 2V:
30Vp-p max.
V
CAT I
High- potential input terminal
Low-potential input terminal
High- potential input terminal
Low-potential input terminal
Signal source
Signal source
High- potential input terminal ........ Terminal for connecting the high- potential input signal
Low- potential input terminal ......... Terminal for connecting the low- potential input signal
CHECKPOINT
• When measuring, connect the WR300/310 GND terminal to the signal source GND terminal. Noise will occur at the
input terminal if the GND terminals are not connected.
• Do not connect the cables with high voltage present (more than 42.4 Vp-p). There is a risk of electric shock or short
circuit if accidentally touched.
• Do not alter the adjustment knobs next to the V amplifier input terminals.
Item Description
Input format Independent unbalanced input for each channel
Measurement range 50 mV to 200 V FS
Max sampling interval 1 µs
Frequency response DC coupling: DC to 200 kHz
AC coupling: 10 Hz to 200 kHz
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 and GND terminals] 33 V AC rms
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