GF UD2100 Betriebsanleitung Seite 18

UD2100 Ultrasonic Doppler Flow Meter
-- Calibration --------
Mode
20mA 500 USG/m
4mA 0 USG/m
Min Flow 5.00 USG/m
Signal Cutoff
Damping
Mode
Percent
Window 1.0 ft/s
PipeID
Cal Constant
18
Calibration (cont.)
Flow
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 re-
10 %
10 % duce the damping average so that a fast response can be made to the sudden change in flow
FIR
rate.
10 %
The LOW PASS filter will ignore measured flow rates outside the Window, while holding the
4.03 in
running average, until there are enough data points outside the Window to cause a step-re-
1.000
sponse 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.
Damping Percent
Higher percentages increase the number of measurements which are averaged together to
produce a stable flow reading. Higher percentages also increase the time it takes for the
meter to make a step-response to the measured flow rate outside the Window in the LOW
PASS Mode.
Damping Window
Defines the Window around the running average, in units of Velocity set in the Units/Mode
menu. Measurements made inside the Window are added to the running average, and mea-
surements outside the Window effect the response of the meter as described in the Mode
section.
Pipe ID
Place the cursor under the digits and then
Pipe ID should be entered as the exact inside diameter of the pipe where the sensor is
mounted. Refer to the Pipe Charts Appendix in this manual for inside diameter of common
pipe types and sizes.
Cal Constant
Scales the velocity reading. Factory value is close to 1.000 for a SE4-A sensor.
Press to return to Menu Selections screen.
Operating Instructions
or to change the numbers and decimal point.