Hioki RM3545, Instruction Manual, Page: 20 / 364

Operating Precautions
12
Before Connecting Data Cables (USB, RS-232C, GP-IB)
Failure to fasten the connectors properly may result in sub-specifica-
tion performance or damage to the equipment.
Always turn both devices OFF when connecting and disconnecting an
interface (except USB) connector. Otherwise, an electric shock acci-
dent may occur.
Observe the following precautions when connecting the instrument and a
controller:
•
To avoid faults, do not disconnect or reconnect the USB cable during instru-
ment operation.
•
The USB, RS-232C, and GP-IB interfaces are not isolated from the ground
circuit. Connect the instrument and the controller to a common earth
ground. Using different grounds could result in potential difference between
the instrument and the controller. Potential difference on the data cable can
result in malfunctions and faults.
Before Connecting the Printer
Because electric shock and instrument damage hazards are present,
always follow the steps below when connecting the printer.
•
Always turn off the instrument and the printer before connecting.
•
A serious hazard can occur if a wire becomes dislocated and contacts
another conductor during operation. Make certain connections are
secure.
Before Switching between Current Sink (NPN) and Current Source (PNP)
•
Configure the NPN/PNP setting to accommodate externally connected
equipment.
•
Do not operate the NPN/PNP switch while the instrument is on.