B-320-2-E
7
3.2 Features and Functions
(1) Long life
Absence of mechanically sliding components except for oval rotors, solenoid valve and control buttons
contributes to long service life. Small wetted parts count and pocketless design makes this meter ideally
suited for flow measurement of chemical liquids.
(2) Electronic register saves time and effort in metering operations.
1) Figures in the LCD display are 12.7mm high for easy readability.
2) Batch setpoint (6-digit) and cumulative total count (8-digit) are selectable with a switch for management
of totals.
3) Front pushbuttons select the desired batch setpoint.
4) Add or subtract counter in the batch process is selectable (subtract counter is standard).
5) Advance signal can be set at any point in a range from 0 to 999 counts.
6) The duration of missing flow signal pulses can be set at any point from 0 to 15 seconds.
7) An overshoot (overmeasurement) can be set at any point from 0 to 99 counts.
8) Can resume a metering cycle for the remainder of a batch that has been interrupted by an emergency
stop.
9) Can review the batch setpoint upon depression of
START
▲
button while a batch cycle is in progress.
(3) Installation location
The register is of waterproof construction (JIS C 0920 Weathertight) for installation outdoors. Its intrinsically
safe explosionproof construction (Exia II BT3) permits installation in hazardous locations (Divisions 0, 1, and
2 area) (explosionproof models only).
(4) Field work required
1) Battery powered, it eliminates the need for an external power source (field wiring not required). The
built-in battery is good for four years (battery life may vary according to the operating conditions). (A
low battery alarm "BATT" flickers in the front LCD when the battery is near to its end.)
2) Replacing the existing OVAL register (LW76) with this new model does not require another air source;
the existing shutoff valve remains serviceable.
(5) Affords adequate protection in batch processes
1) In the model equipped with LW76E register, the shutoff valve opens and closes moderately by the initial
and final flowrate control signals: the arrangement eliminates static electricity buildup in the piping
assembly and in the tank at startup, and prevents hydraulic shock at valve closure.
2) If something erratic (missing flowrate signal, for example) occurs in the batch process, a shutoff valve
closure signal is automatically generated.
3) The operator can monitor shutoff valve operation signals, alarmed conditions, and other status with
front LCD illumination in its 1st and 8th digit segment.
4) In the event the battery has run down during the batch process, safety is maintained by shutting off the
valve automatically. Parameters and variables are retained in the E
2
PROM (nonvolatile memory): you will
not be required of setting them up all over again after battery pack replacement.
(6) Simplified maintenance
The electronics is of modular and printed circuit board construction, housed in a plastic casing; pneumatic
circuitry (solenoid valve assembly), control buttons, and battery pack are of independent units for maximum
ease of maintenance.
⇨
NOTE:
With the use over an extended period of time, meter error will deviate more or less
from that in initial factory calibration. Upon request, we may conduct an instrumental
error testing once again and establish a "new meter factor" in the scaler when your
Ultra OVAL is returned to the factory for periodic inspection or for other reason.
