Precautions To Observe When Taking Measurement - GRAPHTEC midi LOGGER HV User Manual

CHAPTER 2 Checks and Preparation

2 . 1 4 Precautions to Observe When Taking Measurement

To avoid break-downs or short-circuiting accidents, please make sure to follow warnings written below.
•
Use only the AC adapter provided as a standard accessory . The rated power supply range for the adapter
is 100 to 240 VAC, and the rated frequency is 50/60 Hz . Do not use any other voltages .
•
Do not input the voltage that exceeds the specification of this device.
· If 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. It will cause fire.
· Have enough margin from the specification of withstanding voltage when using this device, it has to
consider a noise and change of the measurement voltage .
· Confirm this device is not broken before the input cable is connected to the input terminal.
· Please take care of the static electricity when connecting the input cables or the thermocouples .
· Do not touch the tip of thermocouples with bare hand after the thermocouples are connected to the
terminal of this device when the tip is not insulated .
The static electricity from a human body will cause damage to the device .
· Do not put the tip of thermocouples to an object which contains static electricity when the tip is not
insulated . The static electricity from object will cause damage to the device .
· Do not put the tip of thermocouples to the object which contains leaked high voltage from chassis or
metal etc . when the tip is not insulated .
The leaked high voltage from object will cause damage to this device .
· We recommend that an insulation tape is placed on the tip of thermocouples before connecting it to the
input terminals .
This will protect the device from the static electricity and the leaked high voltage .
•
To prevent electric shock and short circuit accident, do not connect to BNC terminal and screw terminal at
the same time .
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