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2.10 Notes on Measurement
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DANGER
Maximum input voltage ratings for the input unit and the input terminals
of the unit 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 input unit (voltage
between input terminals and main unit frame ground, and between
inputs of other analog 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 with the 8936 or 8938, always
connect the probe to the secondary side of the circuit breaker.
Connection to the primary side involves the risk of electric shock
and damage to the unit.
Input/output terminal Maximum input voltage Maximum rated voltage to earth
8936 (input) 400 VDC max. 370 VAC/DC
8937 (input) 30 Vrms or 60 VDC 30 Vrms or 60 VDC
8938 (input) 400 VDC max. 370 VAC/DC
8939 (input) 10 VDC max. 30 Vrms or 60 VDC
8940 (input) 30 Vrms or 60 VDC
(BNC/sensor connector
terminal)
30 Vrms or 60 VDC (BNC
terminal) Not insulated
(
Sensor
connector terminal)
8946 (input) 30 Vrms or 60 VDC 30 Vrms or 60 VDC
8947 (input)
*1
30 Vrms or 60 VDC
(BNC terminal)
30 Vrms or 60 VDC (BNC
terminal)
9322
2000 VDC, 1000 VAC (CAT II)
600 VAC/DC (CAT III)
When using grabber clips
1500 VAC/DC (CAT II)
600 VAC/DC (CAT III)
When using alligator clips
1000 VAC/DC (CAT II)
600 VAC/DC (CAT III)
EXT TRIG/ START
・
STOP/ PRINT/
EXT SMPL
-5 to +10 VDC
Not insulated
TRIG OUT/ GO/ NG
-20 V to +30 VDC
500 mA max./ 200 mW max.
The maximum allowable charge that can be applied to the miniature connection
terminals is 500 pC at the most sensitive of the six ranges, and 50,000 pC at the least
In order to avoid accidents from electric shock, before removing or
replacing an input unit, check that the connector cables and
thermocouple are disconnected, turn off the power, and remove the
power cable.
Normally keep all two input units installed permanently. If a unit is
not fitted, it must be replaced by a blanking panel. If the unit is
operated with an input unit not in place it poses a shock hazard.
2.10 Notes on Measurement
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