Hioki 8835-01 - Notes on Measurement

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2.9 Notes on Measurement
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DANGE
R
Maximum input voltage ratings for the 8936 ANALOG UNIT, 8937
VOLTAGE/TEMP UNIT, 8938 FFT ANALOG UNIT, 8939 STRAIN UNIT 8940
F/V UNIT, 8946 4ch ANALOG UNIT, 8947 CHARGE UNIT and input
terminals of the 8835-01 are shown below. To avoid the risk of electric
shock and damage to the unit, take care not to exceed these ratings.
The maximum rated voltage to earth of the 8936, 8937, 8938, 8939, 8940,
8946 and 8947 (voltage between input terminals and 8835-01 frame
ground, and between inputs of other input units) is shown below. To
avoid the risk of electric shock and damage to the unit, take care that
voltage between channels and between a channel and ground does not
exceed these ratings.
The maximum rated voltage to earth rating applies also if an input
attenuator or similar is used. Ensure that voltage does not exceed these
ratings.
When measuring power line voltages, 8936 or 8938 should only be
connected to the secondary side of a breaker, so the breaker can
prevent an accident if a short circuit occurs. Connections should never
be made to the primary side of a breaker, because unrestricted current
flow could cause a serious accident if a short circuit occurs.
Input/output termina
l
Maximum input voltage
Maximum rated voltage
to earth
8936 inputs
400 VDC max. 370 V AC/DC
8937 inputs
30 V rms or 60 VDC 30 V rms or 60 VDC
8938 inputs
400 VDC max. 370 V AC/DC
8939 inputs
10 VDC max. 30 Vrms or 60 VDC
8940 inputs
30 V rms or 60 VDC
(BNC and sensor
connector terminals)
30 V rms or 60 VDC
(BNC terminal)
Not insulated
(Sensor connector termina
l)
8946 inputs
30 V rms or 60 VDC 30 V rms or 60 VDC
8947 inputs
30 V rms or 60 VDC 30 V rms or 60 VDC
EXT TRIG
-5 to +10 VDC
Not insulated
START/STOP
PRINT/EXT SMPL
TRIG OUT
-20 V to +30 VDC
100 mA max.
200 mW max.
GO
NG
The external I/O terminal and the 8835-01 have a common GND.
2
.9 Notes on Measurement