GE DigitalFlow XGS868i Programming Manual page 118

Appendix C. Programming the XGS868i Using PanaView™
Transducer
Signal
Parameters Range
M>S Switch 0 to 250 μsec
# Shifts 0 to 10
A Divisor 0.1 to 10
# Transmit
1 to 16
Pulses
T Window
0 to 1000
(cycles)
R Window
10 to 128
(cycles)
After responding to the above prompt, the meter returns to the
C.5.5b The Default Setup Option
Use this option to initialize (reset) all of the parameters within the
Complete the following steps to reset all of the parameters:
1. From the Set Up option menu, highlight and double-click on Default Setup in the center pane.
2. Double-click on No to keep the current values or on Yes to reset all values to their default settings.
After responding to the above prompt, the meter returns to the
C.5.5c The V Averaging Option
Use this option to specify the number of readings that occur before the meter will respond to a step change in flow rate.
In general, the smaller the number of readings, the less steady the display will appear. Complete the following steps to
set the response time:
1. From the Set Up option menu, highlight and double-click on V Averaging in the center pane.
2. Double-click on the desired Response Time (from 1 to 60 sec).
For best results, select the
while still allowing a rapid response to changes in flow rate.
After responding to the above prompt, the meter returns to the
108
Table 20: Transducer Signal Settings (cont.)
Default
Value
If the burst mode is set to Skan/Measure (S/M), the meter switches from
50 μsec Skan to Measure Mode when Delta T is less than the M>S_Switch value.
DO NOT change this value unless advised to do so by the factory.
The number of shifts corresponds to the actual number of transmits per
cycle (number of signals added together in one direction to produce an
3
averaged signal for one interrogation of the fluid) and need only be
changed if the environment is very noisy or the acoustic signal is weak.
A Divisor is used to calculate the Measure Mode integrated threshold
2.5
level and is not normally changed.
# Transmit Pulses specifies the number of pulses in a burst. For difficult
4 conditions (i.e. long paths, high velocity or high temperature), settings as
high as 16 may be necessary.
The XGS868i calculates the size of the transmit window based on pipe
0
size and fluid sound speed. However, for diagnostic purposes, the
window size may be reset.
The XGS868i calculates the size of the receive window based on pipe
10
size and fluid soundspeed. However, for diagnostic purposes, the
window size may be reset.
STATS
(statistics) option, as this increases the response time under steady flow conditions
Description
SET UP
option window.
Signal menu back to their default values.
Set Up
Set Up
option window.
Set Up
option window.
DigitalFlow™ XGS868i Programming Manual