Chapter 1. Programming Site Data
18
DigitalFlow™ XMT868i Programming Manual
1.3.5.2
The AVRG 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, scroll to the
AVRG
option and press
[Enter]
.
2.
Scroll to the desired
Response Time
(from 1 to 60 sec, or
STATS
(statistics)) and press
[Enter]
.
For best results, select the
STATS
(statistics) option, as this increases the response time under steady flow conditions
while still allowing a rapid response to changes in flow rate.
After responding to the above prompt, the meter returns to the
SET UP
option window.
1.3.5.3
The INIT Option
Use this option to initialize (reset) all of the parameters within the
SIGNL
menu back to their default values. Complete
the following steps to reset all of the parameters:
1.
From the
SET UP
option menu, scroll to
INIT
in the center pane.
2.
Scroll to
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
SET UP
window.
1.3.5.4
The ADVAN Option
This option enables you to enable the more advanced features of the meter. In this option you can do the following:
• calculate the kinematic viscosity (KV) based on signal strength or on soundspeed
• enter a table of K-factors (based on velocity or reynolds number) that compensates for non-linear flow rates
• enable mass flow (calculated for static fluid density)
• select the size of the transducer transmission signal.
1.3.5.5
The KV/xx Option
Note:
To select either signal strength or soundspeed for kinematic viscosity calculations, go to Reynolds
Correction in the
PIPE
submenu on page 13.
Use this option to calculate the kinematic viscosity (KV) based on signal strength (SS) or on soundspeed, as selected
in the
KV Input Selection
option of the
PIPE
option. To use this option, you must enter the KV vs. SS pairs in descending
order of KV and ascending order of SS or soundspeed. For example, if pair 1 is KV = 10 centistrokes and SS = 62, then
pair 2 must be KV
10 centistrokes and SS
62. The XMT868i accepts 2 to 20 pairs. Complete the following steps to
enter KV and signal or soundspeed values:
1.
From the
ADVAN
option menu, scroll to
KV/xx
and press
[Enter].
2.
Press
[Enter]
to accept the current
# of KV/SS Pairs
or enter a new value (2 to 20) and press
[Enter]
.
3.
Press
[Enter]
to accept the current
Sig Strength (
or
Soundspeed) #01
value or enter a new value and press
[Enter]
.
Enter the signal strength values in ascending order.
Note:
For signal strength, the acceptable range is 50.0 to 85.0. For soundspeed, the acceptable range is 125 to
9000.
4.
Press
[Enter]
to accept the current
Kinematic Viscosity
value or enter a new value (0.050 to 500) and press
[Enter]
. Enter the kinematic viscosity values in descending order.
The
Sig Strength (or Soundspeed)
and
Kin Viscosity
prompts repeat for each pair. After entering all the pairs, the
meter returns to the
ADVAN
option.
Summary of Contents for DigitalFlow XMT868i
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