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7.2.29 Verifying Operation Of Sensors
Before you start calibrating the RCI-1550, make sure that the
sensors are working correctly and their signals reach the RCI-1550.
The RCI-1550 'sees' the crane and its surroundings through sensors. The signals from these
sensors are represented as numbers inside the RCI-1550. The range of possible numbers is 0
to 1023 when an 8 bit analogue to digital converter is used (which is the most common type).
The RCI-1550 allows the user to view both the UNCALIBRATED or the CALIBRATED
signal from a given sensor
( refer to function code listing at the back of this manual )
.
When viewing the UNCALIBRATED signal from a sensor, make sure the number displayed
is less than 999 and is more than 32 as you work the sensor through its working range. This is
the correct operating range. Also make sure that the numbers displayed in the window are
changing in a nice, smooth manner. If you find that the number is too unstable, that is changes
by more than 10, then you should check the connections to the RCI-1550
( refer to
troubleshooting at the end of this manual )
.
If the signal is less than 32, suspect a short circuit somewhere on that input channel. Eg. the
cable to the RCI-1550 has been crushed and has an internal short circuit in it. Moisture inside
the plugs can look like short circuit too.
If the count displayed in the window is more than 1,000, look for an open circuit on that input
channel. Eg. disconnected lead. If the sensors check out then you can continue on and start
with the calibration procedure. If you find any problems, check the troubleshooting guide at
the end of this manual or seek help from your nearest ROBWAY distributor.
7.3
Tools Required for Calibration
To ensure correct calibration, you will require the following;
•
an accurate 100’ measuring tape
•
an accurate boom angle finder tool
•
a Robway RCI simulator tool is recommended
•
a notepad to record results
•
the correct Robway system manual for the crane
File : 1550-Telescopic-HRT.DOC
Issue Date: - 01/08/05
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