Panametrics Sentinel LCT, Руководство пользователя

Страница: 69 / 248

Sentinel LNG User’s Manual 57
Chapter 4. Advanced Programming
Chapter 4. Advanced Programming
Note: The Advanced Program is accessible only to persons with Field Service, Factory or Engineering status.
The Advanced Program enables the entry of parameters in the following categories:
•
Transducer - enter data for preprogrammed or special clamp-on transducers
• K Factor - enter the Meter Correction (K) Factor as a single value or as a table of values
• Pipe - enter pipe parameters
• Weight Factors - enter the appropriate weight parameter.
To measure flow rate with the
Sentinel LNG
, activate the channel/path(s) and enter the transducer, pipe and fluid
parameters. Appendix A includes a complete set of menu maps for the
User Program
, including Figure 231 on page 212
for the
PROG
menu.
4.1 Entering Transducer Parameters
To enter parameters for preprogrammed or special clamp-on transducers, use the
Transducer
menu. Remember to
record all programmed data in Appendix C, Data Records.
To access the
Transducer
submenu, from the main screen:
1. Press [ESC] . The
Sentinel LNG
enters the
User Program
.
2. Press the [

] key until PROG is bracketed in the top left corner and press [ENT] .
3. Use the [

] and [

] keys to scroll to the desired Channel and press [ENT] .
4. Scroll to the
Transducer
submenu and press [ENT]. Clamp-on and Wetted options appear.
4.1.1 Clamp-On Transducers
1. To set up
Clamp-on
transducers, scroll to
Clamp-on
and press [ENT].
2. Scroll to either
Preprogrammed
(for the standard transducers) or
Other
(for special transducers), and press [ENT].
3. The program also calls for the Wedge Temperature . Scroll to the
Wedge TMP
option and press [ENT]. Then use the
[

] and [

] keys to enter the temperature, and press [ENT].
Note: The wedge temperature of the transducer can be approximated by inputting an average value for the
surface temperature of the outside pipe wall.
4. Do one of the following:
• For preprogrammed transducers, scroll to the desired Transducer Number (407 [2 MHz], 408 [4 MHz], 409
[500 kHz] or 410 [1 MHz]) and press [ENT]. Then press [ESC] three times to return to the
PROG
menu.
• For other
Clamp-on
transducers, proceed to Other Transducers on the next page.
IMPORTANT: Other (special) transducers have no engraved number on the housing and are rarely used. Examine the
transducer housing carefully for a number.
4.1.2 Other Transducers
1. The first required parameter is the Frequency. Press [ENT] to open the
Frequency
window. Then scroll to the
frequency of your transducer (from 0.25 to 4.00 MHz) and press [ENT] .
2. The meter next asks for the Time Delay
(Tw)
. Scroll to the
Tw
option and press [ENT]. Then use the arrow keys to
enter the time provided by Panametrics Sensing (in microseconds), and press [ENT].
3. The next parameter is the Wedge Angle, the angle of the transducer’s ultrasonic transmission in the transducer
wedge. Scroll to the
Wedge Ang
option and press [ENT]. Use the arrow keys to enter the provided angle (in
degrees), and press [ENT].
4. To enter the Wedge Soundspeed, scroll to the
Wedge SS
option and press [ENT] . Use the arrow keys to enter the
provided soundspeed (in m/s or ft/s), and press [ENT].
5. The final parameter is the Temperature Coefficient. Scroll to the
TempCo
option and press [ENT]. Use the arrow
keys to enter the provided coefficient, and press [ENT]. Set the coefficient to 0 if you are unsure of the value.