Safety Guide For Using Gl840 - GRAPHTEC GL840 Quick Start Manual

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Safety Guide for using GL840

Maximum input voltage of standard terminal (B-564)
If a voltage exceeding the specified value goes into the instrument, the electrical
relay in the input will be damaged. Never input voltage level exceeding the
specified value at any moment.
< Between +/– terminals(A) >
• Maximum input voltage: 60Vp-p (Ranges set in 20mV to 2V)
110Vp-p (Ranges set in 5V 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
Maximum input voltage of Withstand High Voltage high-precision terminal (B-565)
If a voltage exceeding the specified value goes into the instrument, the electrical
relay in the input will be damaged.
Never input voltage level exceeding the specified value at any moment.
< Between +/– terminals(A) >
• Maximum input voltage: 60Vp-p (Ranges set in 20mV to 2V)
110Vp-p (Ranges set in 5V to 100V)
< Between Channel to channel (B) >
• Maximum input voltage: 600Vp-p
• Withstand voltage: 600Vp-p
< Between Channel to GND (C) >
• Maximum input voltage: 300Vp-p
• Withstand voltage: 2300 VACrms at 1 minute
Warm-up
GL840 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.
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