Dynasonics TFXM Series Ultrasonic Multi-Channel Flow Meter - Manual (Page 63)

Rev. 8/02
-3. 25- TFXM
SIG STR - Signal Strength
The measurement of Signal Strength assists service personnel
with troubleshooting the TFXM system. In general, expect the
signal strength readings to be greater than 5% on a full pipe
with the transducers properly mounted. Signal strength read-
ings that are less than 5% may indicate a need to chose an al-
ternative mounting method for the transducers or that an im-
proper pipe size has been entered.
Signal Strength readings in excess of 95% may indicate that a
mounting method with a longer path length may be required.
For example, if mounted on a 3 inch PVC pipe in V-mode
causes the measured Signal Strength value to exceed 95%,
change the mounting method to W-mode for greater stability in
readings.
PART 3 - KEYPAD CONFIGURATION
Deg. C Deg. F Vs (m/s) Vs (f/s)
0 32 1402 4600
10 50 1447 4747
20 68 1482 4862
30 86 1509 4951
40 104 1529 5016
50 122 1543 5062
60 140 1551 5089
70 158 1555 5102
80 176 1554 5098
90 194 1550 5085
100 212 1543 5062
110 230 1532 5026
120 248 1519 4984
130 266 1503 4931
140 284 1485 4872
150 302 1466 4810
160 320 1440 4724
170 338 1412 4633
180 356 1390 4560
190 374 1360 4462
200 392 1333 4373
220 428 1268 4160
240 464 1192 3911
260 500 1110 3642
TABLE 3.1
Sound Speed in
Liquid Water
Vs.
Temperature
Signal Strength