Sensor Technology 2016
Page 7
RWT3745V (Rev 2)
Built In Test (BIT)
When the RWT series transducer is switched on it will carry out its Built In Test (BIT)
procedure. While the BIT procedure is taking place there will be a series of green flashes
from the LED, this is followed by a steady green or an intermittent green flash depending
upon the mode of operation.
If the transducer fails its BIT procedure the transducer will display an error sequence
identifying the results of each system test. The sequence will repeat until the transducer is
powered off.
The error sequence is prefixed with quick succession of red flashes, identifying the LED
sequence as an error condition
After a pause a sequence of green and red flashes will indicate the results of each system
test. The following table lists the tests and there test order, for each test the transducer will
output either a GREEN for PASS or RED for FAIL.
Test/Sequence Number
System Checks
1
Firmware Version 3/4: Head Connected Check
Firmware Version 5: Electronics Check
2
SAW Device Check
3
Temperature Sensor Check
4
Internal Voltage Check
5
Data Configuration Check
6
Calibration Check
7
SAW Parameters Check
8
ORT Parameters Check
If a failure condition exists try power cycling the transducer. Contact the factory if the problem
continues.
If an error occurs during operation (solid RED LED) and is not present on power on, the BIT
procedure may not identify the fault. If the Zero Input has been wired it is possible to display
the Built In Test output, to do this switch the Zero Input ON until the transducer starts flashing
RED.
Summary of Contents for RWT420
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Page 31: ...Transducer Control 5 User Manual Revision 5 December 2016...
