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XTP601 User's Manual
2.7.9
Light Guide Option
The light guide is an optional accessory fitted, ideally, to the left hand cable entry and
has a red and green LED to display the status.
•
Green On - indicates instrument power is on.
•
Red LED flashing - indicates when external compensation input or
external sensor is out of range (if either is selected to
is <3.6 mA or >21 mA (see Status Message Table in Section 2.5.1).
•
Red LED On – indicates an internal sensor error or instrument cell
temperature not yet stabilized (see Status Message Table in Section 2.5.1)
– for LED indication this takes priority over external errors.
These have been designed to follow the NAMUR NE44 standard.
Michell Instruments
OPERATION
). Out of range
ON
21
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