E-880-2N-E
0
6. INTERNAL COMPONENTS AND FUNCTIONS
6.1 Front Panel
6.1.1 Display
The display is a 28
×
28-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:
() Total mass flow (TOTAL COUNT)
Incoming flow pulses are calculated to read in mass units, integrated, and the obtained totalized mass
flow is indicated on the display. 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 mass flow is retained in a nonvolatile memory (E
2
PROM) irrespective of power cycling,
it is resettable to zero following a power cycle if so configured in the SYS mode.
(2) Total calorific flow (TOTAL COUNT2)
Total flow after conversion to calorific units is indicated on the display. Other specifications remain the
same as ().
() Instant mass flowrate (FLOW RATE)
Instant flowrate (hourly) after conversion to weight units is indicated on the display. Resolution, or the
minimum unit of measurement, varies with customer specifications.
() 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.
() Correction factor (COMP. FACTOR)
The value determined by correction factors and the relative density is indicated.
Correction factor = Meter error correction factor
×
Meter correction factor
×
Relative density
() Correction factor 2 (COMP. FACTOR2)
The value determined by correction factors, the relative density, and specific enthalpy is indicated.
Correction factor 2 = Meter error correction factor
×
Meter correction factor
×
Relative density
×
Specific enthalpy
() Meter error correction factor (METER ERROR)
Meter error correction factor corresponding to the flow rate currently fed to the instrument is indicated.
(8) Meter correction factor (Et)
Based on the temperature information currently fed to the instrument, the meter error correction factor
dependent on the volumetric expansion of meter body (
α
) is indicated.
() Relative density (specific weight) (SPEC. WEIGHT (SAT))
The relative density determined by the temperature and pressure values currently fed to the
instrument is indicated. If a problem arises in the temperature and pressure inputs, it is calculated
based on their default fallback values.
(0) Specific enthalpy (SPEC. ENTHALPY (SAT))
Similar to obtaining the relative density, the value determined by temperature and pressure is indicated.
Calorific conversion is carried out based on this reading in indicated unit and the reading in ().
Specific calorific value = Relative density
×
Specific enthalpy
NOTE: For more information about setup items and options, see "KEY OPERATION MANUAL".
