GRAPHTEC GL820 - Safety Precautions

Tf a voltage exceeding the specified value is input, the semiconductor relay in the
input
section
will
be
damaged.
Never
input
a
voltage
exceeding
the
specified
value
even for a moment.
<Between +/—terminals (A) >
*Maximum input voltage : 60Vp-p
<Between input terminal/input terminal (B) >
-Maximum input voltage : 60Vp-p
Withstand voltage : 350 Vp-p at 1 minute
<Between input terminal/GND (C) >
Maximum input voltage : 60Vp-p
-Withstand voltage : 350 Vp-p at 1 minute
Warmin
GL820 requests to have approximately 30 minutes warm-up in order to have the
The analog input section has high impedance.
If it is open, measured value may vary due to noise.
In
such
a
case,
set
to
"Off"
unused
channels
in
the
AMP
setting
menu
or
short
the
+
and
—
terminals.
If measured values fluctuate due to extraneous noise, conduct the following
countermeasures.
(Results may differ according to noise type.)
Ex 1 ; Connect the GL820's GND to ground.
Ex 2 : Connect GL820's GND to measurement object's GND.
Ex 3 : In the AMP settings menu, set filter to any setting other than "OFF".
Ex 4: Operate GL820 with batteries (Option: B-517).
Ex
5:
Set the
sampling
interval
which
enables
GL820’s
digital
filter
(see
table
below).
Number of Measuring ‘Allowed Sampling Interval ‘Sampling Interval which
ranne's* enables Digital Filter
1 chahnnel or less 10 msec or slower=* | 50 msec or slower
2 chahnnels or less 20 msec or slower | 125 msec or slower
5 chahnnels or less | 50 msec or slower | 250 msecor slower |
10 chahnnels or less! 100 msec or slower 500 msec or slower
11 to
20
chahnnels
200
msec
or
slower
1
sec
or
slower
21 to 50 chahnnels 500 msec or slower 2 sec or slower
51 to 100 chahnnels 1 sec or slower 5 sec or slower
101 to 200 chahnnels| 2 sec or slower | 10 sec or slower
‘*Number of Measuring Channels” is the number of channels in which
input settings are NOT set to “OFF”.
**Temperature cannot be measured when the sampling interval is set to 10, 20, or 50 ms.
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