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Notes on Use
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DANGER
Power Supply Connections
Before connecting the unit, make sure that the power supply
voltage matches the rated power supply voltage of the unit.
Probe Connection, Measurement Voltage Input
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.
Always use the supplied connector cables. Any exposed metal
sections in a connector cable consist a risk of electric shock.
The logic units all have and the unit have a common ground.
The external I/O terminal and the unit have a common GND.
Notes on Use
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)
*1: 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 sensitive range.
In order to ensure safe operation and to obtain maximum performance from
the unit, observe the cautions listed below.
Inspection before Use
Before using the product the first time, verify that it operates normally to
ensure that the no damage occurred during storage or shipping. If you find
any damage, contact your dealer or Hioki representative.
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