Sperry Marine Rudder Angle Indicator System, Руководство по эксплуатации, установке и обслуживанию

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056357/B RAIS
6-12 In- and Output Calibration
6.3 In- and Output Calibration
To attain the calibration accuracy required to comply with ISO 20673 for
all RAIs connected, the RAC applies calibration to the input signal as
well as to all analogue outputs separately.
Before the system may be taken into operation, the feedback input and
all used outputs are to be calibrated. The RAC application’s calibration
page provides the required controls for these tasks:
WARNING
Risk of personal injury
To calibrate the feedback input, the rudder has to be moved over its
entire range. Always make sure that the steering gear is operative and
that the rudder may be actuated safely without any risk of personal
injury or damage to equipment, especially when the vessel is drydocked
and works are carried out by shipyard personnel.
Always inform the shipboard or shipyard personnel in charge of your
intention to actuate the rudder and obtain permission to operate the
steering gear for calibration purposes, before moving the rudder.
Note
The calibration procedures require that tasks are carried out at different
locations on the vessel.
If possible, use voice communication to instruct one or more helpers to
report the actual rudder angle indications as read from the rudder stock
scale and indicated at the RAIs respectively.