SERANA–Q Serial Analogous Indicators - Operating Manual
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4.3 Scale
The scale is divided into 4 regions:
•
Indication range with scale marks and figures
•
Two ranges for overscaling/underscaling
•
Overflow range - The size of the overflow range can vary depending on the used scale.
•
Zero position outside of the scale - The pointer is located here when powered off, and
when no valid data have been received.
•
Zero adjustment - By using the center aligned zero adjustment, the pointer can be
adjusted congruent with the scale zero line. Use a suitable screw driver for it.
Overflow range
The pointer is positioned in the overflow range as long as the value to be displayed
deceeds/exceeds the absolute display minimum/maximum. Then, the value will be cut off.
For example, on a rudder angle indicator, from ±81° to ±88° the pointer will be positioned
correctly. Only above ±88 °, the value will be cut off.
The overflow range can vary depending on the scale. For some values, there is only a
maximum overflow range (e.g. for depth indicators)
4.4 Status indication
The middle round LED is multi-color and, therefore, can signal various operating states.
LED
Trend
Trend
Meaning
OFF
The device is powered off or defective (including firmware
checksum error).
The pointer is in the zero position.
Green
The device is operational and receives valid, constant data
in the admissible range.
The pointer is positioned according to the received data.
Green
ON
OFF
Green
OFF
ON
The device is operational and receives valid data in the
admissible range. The pointer moves and the yellow arrow
of the trend indication signals the alteration direction. The
signalling takes place already before a pointer movement
can be seen.
Yellow
OFF
OFF
None or no valid data are received (e.g. cable break)
The pointer is in the zero position outside of the scale.
Yellow
ON
OFF
Yellow
OFF
ON
The maximum value has been exceeded. The pointer is
positioned in the overflow range. the yellow status LED
signals overflow.
Yellow
ON
ON
Fatal error, device is not operational.
Configuration error (Setup), selftest error, or over-
/undervoltage error. Only the voltage error could be fixed
on-board.
Summary of Contents for SERANA-Q 144
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