Pv Damping- Adjusting Damping Time; Table 24 Adjusting Damping Time - Honeywell ST 3000 User Manual

6— Configuration - PV damping— Adjusting Damping Time
PV damping— Adjusting Damping Time
You can adjust the damping time to reduce the output noise. We suggest that you set the damping to the
smallest value that the system can accept.
ATTENTION
The electrical noise effect on the output signal is partially related to the turndown ratio of the
transmitter. As the turndown ratio increases, the peak-to-peak noise on the output signal
increases. You can use this formula to find the turndown ratio using the range information for
your transmitter.
EXAMPLE:
The procedure in Table 24 outlines how to adjust the damping time.
Step
1 From "Online" menu, select "Device setup" and press right arrow key.
2 Scroll down to "Basic setup" and press right arrow key.
3 Scroll down to "PV Damp" and press right arrow key.
4 At "PV Damping" display, use the [ ⇑ ] and [ ⇓ ] keys to scroll through selections until desired
value is highlighted. Press ENTER.
The damping values are set at:
If you do not want to change the damping value, press ABORT.
5 Either:
• press SEND to download change to transmitter, or
go to another procedure and continue making changes.
•
62
Turndown Ratio =
(Upper Range Value – Lower Range Value)
The turndown ratio for a 400 inH 2 O transmitter with a range of 0 to 50 inH 2 O would be:
400
Turndown Ratio = (50 – 0) =

Table 24 Adjusting Damping Time

0.00 s, 0.16 s, 0.32 s,
2.00 s, 4.00 s, 8.00 s, 16.0 s, 32.0 seconds.
ST 3000 HART Transmitter Release 300 User Manual
Upper Range Limit
8
1 or 8:1
Action
0.48 s, 1.00 s,
10/05