Safety Guide for using GL240
Maximum input voltage
If a voltage exceeding the specified value goes into the instrument, the electrical
relay in the input will be damaged. Never input a voltage exceeding the specified
value at any moment.
< Between +/– terminals(A) >
• Maximum input voltage: 60Vp-p (Range of 20mV to 1V)
110Vp-p (Range of 2V to 100V)
< Between Channel to channel (B) >
• Maximum input voltage: 60Vp-p
• Withstand voltage: 350 Vp-p at 1 minute
< Between Channel to GND (C) >
• Maximum input voltage: 60Vp-p
• Withstand voltage: 350 Vp-p at 1 minute
Warm-up
GL240 requires approximately 30 minutes warm-up time to deliver the optimum
performance.
Unused channels
The analog input section can frequently have cases of impedance.
Left open, measured value may fluctuate due to noise.
To rectify, set unused channels to "Off" in the AMP setting menu
or short the + and – terminals for better result.
Noise countermeasures
If measured values fluctuate due to extraneous noise, run the following
countermeasures.(Results may vary according to noise type.)
Ex 1 : Connect the GL240's GND input to ground.
Ex 2 : Connect GL240's GND input to measurement object's GND.
Ex 3 : Operate GL240 with batteries (Option: B-569).
Ex 4 : In the AMP settings menu, set filter to any setting other than "Off".
Ex 5: Set the sampling interval which enables GL240’s digital filter
(see table below).
Number of Measuring
Channels
*1
1 Channel or less
5 Channels or less
2 Channels or less
10 Channels or less
10 msec or slower
*2
50 msec or slower
*2
20 msec or slower
*2
100 msec or slower
50 msec or slower
250 msec or slower
125 msec or slower
500 msec or slower
Allowed Sampling
Interval
Sampling Interval which
enables Digital Filter
*1 Number of Measuring Channels is the number of active channels in which input settings
are NOT set to “Off” .
*2
Temperature cannot be set when the active sampling interval is set to 10 ms, 20 ms or 50 ms.
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