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6. INTERNAL COMPONENTS AND FUNCTIONS
6.1 Front Panel
6.1.1 Display
The display is a 128 X 128-dot multiple function display capable of showing the data, units of measure,
error messages, and other information at the same time. (The display is backlighted.)
6.1.2 On-Screen Menu Items
The units of measurement vary with configuration. Their selection is made in the SET mode. Available
menu items are:
(1) Uncorrected total flow (TOTAL COUNT)
Incoming flow pulses are calibrated for meter error, integrated before correction for temperature,
and the obtained totalized flow is indicated. Resolution, or the minimum unit of measurement, which
varies with customer specifications, is set up with front-panel keys. This unit automatically becomes
identical with the output pulse unit.
While the total flow is retained irrespective of power cycling, it is resettable to zero following a power
cycle if so configured in the SYS mode.
(2) Corrected total flow (TOTAL COUNT(C))
The reading calibrated for meter error and temperature is integrated. Other specifications remain
the same as (1).
(3) Uncorrected instant flowrate (FLOW RATE)
The instant flowrate calibrated for meter error is indicated before temperature correction.
(4) Corrected Instant flowrate (FLOW RATE(C))
The instant flowrate calibrated for meter error and corrected for temperature is indicated.
(5) Temperature (TEMPERATURE)
The temperature value currently fed to the instrument is indicated. If a problem arises in the course
of temperature conversion, such as out-of-scale, a default fallback value is indicated.
(6) Meter error correction factor (METER ERROR)
Meter error correction factor corresponding to the flowrate currently fed to the instrument is
indicated.
Based on this reading, the total before correction is calibrated for meter error.
[Indicated reading] = 1 +
−−−
(7) Temperature correction factor (TEMP. COMPEN.)
The temperature correction factor calculated based on the temperature currently fed to the
instrument is indicated. The corrected total flow is compensated based on this reading.
(See Section 7.2 "Implementation of Temperature Correction".)
NOTE: For more information about menu items and options, see "KEY OPERATION MANUAL".
6.1.3 Error Messages
When an erratic condition arises, an error message automatically appears on the display. (The
information represented by error messages are listed on page 15.)
If two or more concurrent errors are involved, individual messages will be scrolled at intervals of
approximately 3 seconds. When an error condition disappears, an error message automatically goes out
and the normal display is resumed.
NOTE: An error logging function can store a maximum of 20 events each of which consists of year,
month, day, hour and minutes of error occurrence and recovery. (Complete details are
covered in the Key Operation Manual.)
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