Toshiba LF494 - Manual (Page 37)

TOSHIBA
6 F 8 A 0 7 7 4
1 3
Itasic operations
How measurement in the mcasuicinent mode, checking or changing configuration
parameters in the setting mode and a converter unit check in the calibration mode arc
the basic operations of the LF404 converter
7J,1 Mode Change
The Lr404 converter has three operation modes: measurement, setting and calibration.
The system stays in the measurement mode after the power is turned on. To change the
mode to the selling or calibration mode, press [SET] and select the desired item using
( ► ] and [ A. ] keys. To return to the measurement mode, scJect “tP (MliASURH
MODE) for the number column of configuration items (such as AO or BO), Sec 7.4,
“Configuration Items Selection Table.”
■ Measurement mode
: measures the process flow and displays and outputs the measured process values, The
flowmeter can measure the flow velocity, flow rates, or totalised How, The flowmeter
first goes into this mode when power is turned on.
Setting mode
r used Lo check or change various configuration parameters used in the measurement
mode. These parameter values are displayed while checking or changing these values
hut the flowmeter outputs the measured process values as in the measurement mode.
See 7.4, "Configuration items Selection Table” and S.2, “Checking or Changing
Parameters” for details. Configuration items are from A1, A2, A3 to Ml.
Cnlibration mode
: used to check the converter internal circuits. The intemally generated simulation signal
is used to check the measurin| span and excitation current value. The current output of
the flowmeter changes in accordance with the simulation signal. The status of each
digital output is held to the value just before the .system moved into the calibration
mode. See 7,4, ^'Configuration Items Selection Table” and Chapter 9, “Calibration” for
details. Configuration items are from M lo N4,
-
3 6
-