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Revision 4
Figure 21: Ground connection on the main board
When the device is grounded properly, there is no change in the output signal level when you touch the
enclosure.
Signs of improper grounding
If the device is not grounded properly, it can show the following behavior:
•
Base value of the output signal is >3000 IEU when the process is not running.
•
The output signal level changes when you touch the enclosure.
•
The displays indicate “Err1” with the red status LEDs blinking. This means that the sensor probe is
grounded.
Subpar power supply can cause behavior similar to improper grounding. Only use
NEC Class 2 or equivalent power supply.
Connecting ground wire
To connect the device to ground, you need:
Protective gear for electric work
Pin wrench or
1
⁄
2
-inch ratcheting socket wrench
Phillips-head screwdriver (M5)
Wrench (20 mm [0.7874 in] or adjustable)
Suitable ground wire
