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95
Service Manual
Third edition, June 1997
9.6 Transmitters
9.6.1 Ullage indication not updated close to empty tank.
Too weak radar echo due to inclined bottom or sludge on tank bottom.
• Ullage indication will be resumed when the tank is loaded again.
9.7 Local Display
9.7.1 Local Display blank
Setting of display mode may be incorrect.
• Check setting either on Backup Display in Level Unit, see chapter
5.9.4, or from the Transmitter Data-window in the Service part of the
Work Station, see chapter 3.9.
Cabling between Local Display and Transmitter may be faulty.
• Restart Transmitter and Local Display by disconnecting the
connector for that Transmitter on the LI, and then connect it again.
Check if the Local Display starts working.
• Check cabling, and repair if necessary.
Saab TankRadar system may be starting up.
• Wait approximately 15 min and then check if the Local Display
works.
Communication failure to Transmitter.
• Check for CFAIL status on Transmitter. See chapter 9.3.5.
9.8 Temperature Measurement
9.8.1 Incorrect temperature values on one tank
Incorrect setting of temperature range
• Check temperature range in Cargo Tank Sensors-window in
Configuration part of Work Station software. If necessary, change to
correct range and restart Transmitter by disconnecting and
connecting its cable at the LI in the Level Unit.
9.9 Inert Gas Pressure Measurement
9.9.1 Incorrect reading of the IG pressure
IG Pressure sensor not correctly zero adjusted.
• If, or when, conditions allow it, do a zero adjustment of the IG
pressure sensor. See chapter 6.4.
Venting hose of the sensor may be clogged or squeezed.
• Check that the venting hose ventilates to the outside of the
Transmitter housing. See chapter 6.4.
IG pressure sensor may have been subjected to a too high pressure (more
than twice the maximum range).
• Zero adjust sensor. See chapter 6.4.
• If it is not possible to adjust, replace it. See chapter 6.4.