Measuring Accuracy - Honeywell RM640 Handbook

RM640

8.3 Measuring accuracy

Use these graphs to find the measuring accuracy for a given distance from the transmitter.
4
3
2
1
0
-1
-2
-3
-4
Figure 8-2: Measuring accuracy (graph of measuring accuracy in mm against measuring distance in m)
X: Measuring distance from the thread stop or flange facing of the process connection [m]
Y: Measuring accuracy [+yy mm / -yy mm]
1 Minimum recommended blocking distance = antenna extension length + antenna length + 300 mm
0.2
0.1
0
-0.1
-0.2
Figure 8-3: Measuring accuracy (graph of measuring accuracy in inches against measuring distance in ft)
X: Measuring distance from the thread stop or flange facing of the process connection [ft]
Y: Measuring accuracy [+yy inches / -yy inches]
1 Minimum recommended blocking distance = antenna extension length + antenna length + 11.81¨
INFORMATION!
To calculate the accuracy at a given distance from the antenna, refer to Technical data on page
131
(measuring accuracy).
34-VF-25-131 iss.1 GLO Feb 2019 US
1
20
0.98
www.honeywellprocess.com
10
30 40 50
TECHNICAL DATA
20
15
60 70 80
8
137