- calibration
To calibrate the production system, a number of functions have to be
found that can be used to estimate the heating temperature
that corresponds to a given temperature sensor voltage, and
the heating current that results in the heating temperature
reaching, but not exceeding, a given target temperature.
These estimation functions are found during the calibration
procedure, which consists of a number of heating stages that
use different heating currents. At the end of a stage, when the
temperature sensor voltage has become reasonably stable, the user
is asked to take a temperature measurement, which is recorded
along with the heating current used and the temperature sensor
voltage at the time of the measurement. After a reasonable number
of heating stages, which may take several hours to complete, the
estimation functions are fitted to these data.
- calibration procedure
- The operation that is performed to calibrate the production system.
See calibration.
- calibration stage
- TODO
- client
- The clients of a class or function are the classes or functions that
use the functionality it provides. A sapient entity that uses the
application is a user, not a client.
- device
- The FCI-7011 fiber coupler production system controlled by the
application. Used when that term production system
could be misunderstood as referring to an instance of
ops.system.ProductionSystem.
- estimation function
- One of the functions that need to be fitted for the production system
to be calibrated. See calibration.
- heater
- The part of the production system used to heat the fiber. The heater
can be moved forewards and backwards, and can be operated with a range
of heating currents. It’s heating
temperature is measured by the temperature sensor.
- heating current
- The current, always expressed in mA, that is used to operate the
production system’s heater. In most cases, heating the system
to a given target temperature will be more convenient than
explicitly setting a heating current.
- heating stage
- TODO
- heating temperature
The temperature, always expressed in °C, that the production system’s
heater is heating with. The system does not directly report
its heating temperature, however. Instead, its temperature
sensor reports its voltage, which can be linked to an estimated
temperature if the system is calibrated.
Under some circumstances, the temperature sensor voltage – and
consequently the reported heating temperature – may not be an accurate
reflection of the actual heating temperature. See temperature
sensor.
If the system is calibrated, it is also possible to heat the system
to a given temperature. See target temperature.
- heating unit
- The heater.
- production system
- The FCI-7011 fiber coupler production system controlled by the
application, or an instance of ops.system.ProductionSystem.
In contexts where it might be ambiguous which one is meant, the term
device is used to refer to the physical production system,
and the term production system instance is used to refer to an
instance of the class.
- safe mode
- In order to prevent damage to the production system, the application
monitors its heating temperature and temperature sensor
voltage. If either exceeds its safe limits, the system is switched
into its safe mode, where its heating current is lowered to
a value that is known to be safe. The current may then be changed
again, at which point the system leaves its safe mode.
- system
- Short for production system.
- target temperature
- A temprature, always expressed in °C, the production system’s
heater is supposed to reach, but not exceed. In order to set
a target temperature, the system needs to be calibrated.
- temperature measurement
- A measurement of the heating temperature that has been taken
by the user. A number of temperature measurements are necessary to
calibrate the production system.
- temperature sensor
A sensor that measures the temperature of production system’s
heater. The application receives its measurements in the
form of the temperature sensor voltage, however, and in order
to determine which heating temperature a given voltage corresponds
to, the system needs to be calibrated.
If the heater is not in its foremost position, the reported voltage
will not be an accurate reflection of the heater’s temperature. Also,
the temperature sensor can be moved aside by the user for easier
access to the production system. If it is, the temperature sensor
voltage will be unrelated to the actual heating temperature.
- temperature sensor voltage
- The voltage, always expressed in V, the application receives from
the production system’s temperature sensor. Used to estimate
the heating temperature if the system is calibrated.