E-882-4-E
6. INTERNAL COMPONENTS AND FUNCTIONS
6.1 Front Panel
6.1.1 Display
The display is a 128
×
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
pressure, and the obtained totalized flow is indicated. Resolution, or the minimum unit of measure-
ment, 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 corrected for temperature and pressure is integrated.
Other specifications remain the same as (1).
(3) Uncorrected instant flowrate (FLOW RATE)
The instant flowrate calibrated for meter error without temperature and pressure correction is indi-
cated.
(4) Corrected instant flowrate (FLOW RATE(C))
The instant flowrate calibrated for meter error and corrected for temperature and pressure is indi-
cated.
(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. With a model
dedicated to pressure only, a default fixed temperature value is indicated.
(6) Pressure (PRESSURE)
The pressure value currently fed to the instrument is indicated. If a problem arises in the course of
pressure conversion, such as out-of-scale, a default fallback value is indicated
(7) Meter error correction factor (METER ERROR)
Meter error correction factor corresponding to the flowrate currently fed to the instrument is indi-
cated. Based on this reading, the total before correction is calibrated for meter error.
[Indicated reading] = 1 +
−−−
(8) 3
α
correction factor (3
α
COMPEN.)
Based on the temperature information currently fed to the instrument, the meter error correction factor
which is dependent on the volumetric expansion of meter body (3
α
) is indicated.
(9) Temperature/pressure correction factor (T/P COMPEN.)
The factor determined by the temperature and pressure currently fed to the instrument is indicated.
Based on this reading, correction of the corrected total is carried out.
[Indicated reading] =
(10) Quadratic correction factor (QUADRATIC COMPEN.)
Correction factor X of a quadratic function of temperature and pressure is indicated.
NOTE: For more information about menu items and options, see "KEY OPERATION MANUAL".
E
100
（
−−−
）
（
−−−
）
×
T
0
T
P
P
0
