1
BEFORE USE
Precautions to Observe When Performing Measurement
ZR-RX40 Start Up Guide
21
Precautions to Observe When Performing Measurement
Unused channels
Capacitors have been incorporated into the analog input circuit to increase the noise elimination capability.
Therefore, if input terminal is open, or signals are not input to the terminal, measured results may be influenced
by signals from other channels. In such a case, set input setting to “Off” or short circuit the + and – terminals.
If signals are input correctly, measured results are not influenced by other channels.
Noise countermeasures
If measured values fluctuate due to extraneous noise, conduct the following countermeasures.
(Results may differ according to noise type.)
Connect the ZR-RX40’s GND to ground.
Connect ZR-RX40’s GND to measurement object's GND.
Measure using batteries (sold separately: ZR-XRB1). Battery pack ZR-XRB1 (Option) is required.
In the AMP settings menu, filter is used.
Set the sampling interval which enables ZR-RX40’s digital filter (see table below).
*“Number of Measuring Channels” is the number of channels in which input settings are NOT set to “OFF”.
Number of Measuring Channels*
Sampling Interval which enables Digital Filter
10 channels or less
500 msec or above
11 to 20 channels
1 sec or above
21 to 50 channels
2 sec or above
51 to 100 channels
5 sec or above
101 to 200 channels
10 sec or above
50
Ω
50
Ω
500k
Ω
500k
Ω
0.05
μ
F
0.05
μ
F
㧗
㧙
Channel switching relay