PULSAR MEASUREMENT
15
CALIBRATION (cont.)
LOE Time
Should the level reading be lost because of air or
debris in the system, the LOE Time will cause the meter
to hold the last valid level reading until the LOE Time is
expired, at which point the meter will produce a Loss of
Echo alarm message. Having a LOE Time in the meter
means that intermittent air or debris issues in the
system will not cause the meter to lose flow reading. If
you desire that the meter respond quickly to a Loss of
Echo, set the LOE Time to a low value.
Level Damping
Mode
Choose between OFF, FIR (Default), or LOW PASS.
When measured flows are outside the Window of the
running average, the FIR filter will reduce the damping
average so that a fast response can be made to the
sudden change in flow rate.
The LOW PASS filter will ignore measured flow rates
outside the Window, while holding the running
average, until there are enough data points outside the
Window to cause a step-response to the new
measured value.
While measured flows are within the Window of the
running average, both the FIR and LOW PASS filter
behave the same.
Percent
Set the damping value for level reading. Lower values
provide fast response to changing levels, and higher
values provide a slower response. Factory default value
is 10%.
Window
The Window sets a boundary around the running
average, where if the measured value falls outside the
window, the meter will make a more rapid response to
the new value (FIR), or will hold the last reading until
enough values are outside the window and then make
a step response to the new value (LOW PASS).
Velocity
Min
Only shown when Mode = Velocity in the Units/Mode
menu. When measured velocity is less than the Min
Velocity, the reading on the LCD display and output
signals will report 0.
--Calibration-------
Range
Max
180.00 in
Min
8.00 in
Level
Max
180.00 in
Min
1.00 in
20mA
180.00 in
4mA
0.00 in
Lvl Offset
0.00 in
LOE Time
30 sec
Level Damping
Mode
FIR
Percent
10%
Window
1.00 in
Velocity
20mA
10.00 ft/s
4mA
0.00 ft/s
Signal Cutoff
10 %
Velocity Damping
Mode
FIR
Percent
10%
Window
1.00 ft/s
Flow
Min
0.00
/m
USG
20mA
USG
500.00
/m
4mA
0.00 USG/m
Cal Constant
1.000
