Endress+Hauser promag 31, Руководство по эксплуатации

Страница: 34 / 60

For each nominal diameter is a choice of eight pulse values (in decadic steps).
A definite frequency value (f
max
= 400 Hz at v = 10 m/s, pulse width = 1 ms) is only
available for a single switch position.
Example:
A maximum permissible pulse frequency f
max
= 20 Hz (input frequency of electronic
counter) should not be exceeded. The nominal diameter is assumed to be 25 mm;
the rate of flow Q = 10.8 m
3
/h
Pulse value =
Q
=
10.8 m
3
/h
=
3 dm
3
/s
= 0.15 dm
3
f
max
20 s
-1
20 s
-1
At DN 25 select the switch position for the next higher pulse value
⇒
1 dm
3
per pulse. Conversely, when the flow rate Q is known and a
pulse value has been selected, the exact pulse frequency can be
calculated.
Table
A
Pulse value
⇒
SI units [dm
3
/pulse, m
3
/pulse]
Switch No. 5, 6 and 7
DN
[mm]
ON
OFF
15
25
32
40
50
65
80
100
125
150
200
250
300
350
400
450
500
600
700
800
900
1000
1200
1400
1600
1800
2000
0.01 dm
3
0.1 dm
3
0.1 dm
3
0.1 dm
3
0.1 dm
3
0.1 dm
3
1 dm
3
1 dm
3
1 dm
3
1 dm
3
1 dm
3
10 dm
3
10 dm
3
10 dm
3
10 dm
3
10 dm
3
10 dm
3
10 dm
3
100 dm
3
100 dm
3
100 dm
3
100 dm
3
100 dm
3
100 dm
3
100 dm
3
100 dm
3
100 dm
3
0.1 dm
3
1 dm
3
1 dm
3
1 dm
3
1 dm
3
1 dm
3
10 dm
3
10 dm
3
10 dm
3
10 dm
3
10 dm
3
100 dm
3
100 dm
3
100 dm
3
100 dm
3
100 dm
3
100 dm
3
100 m
3
1 m
3
1 m
3
1 m
3
1 m
3
1 m
3
1 m
3
1 m
3
1 m
3
1 m
3
1 dm
3
10 dm
3
10 dm
3
10 dm
3
10 dm
3
10 dm
3
100 dm
3
100 dm
3
100 dm
3
100 dm
3
100 dm
3
1 m
3
1 m
3
1 m
3
1 m
3
1 m
3
1 m
3
1 m
3
10 m
3
10 m
3
10 m
3
10 m
3
10 m
3
10 m
3
10 m
3
10 m
3
10 m
3
10 dm
3
100 dm
3
100 dm
3
100 dm
3
100 dm
3
100 dm
3
1 m
3
1 m
3
1 m
3
1 m
3
1 m
3
10 m
3
10 m
3
10 m
3
10 m
3
10 m
3
10 m
3
10 m
3
100 m
3
100 m
3
100 m
3
100 m
3
100 m
3
100 m
3
100 m
3
100 m
3
100 m
3
100 dm
3
1 m
3
1 m
3
1 m
3
1 m
3
1 m
3
10 m
3
10 m
3
10 m
3
10 m
3
10 m
3
100 m
3
100 m
3
100 m
3
100 m
3
100 m
3
100 m
3
100 m
3
1000 m
3
1000 m
3
1000 m
3
1000 m
3
1000 m
3
1000 m
3
1000 m
3
1000 m
3
1000 m
3
1 m
3
10 m
3
10 m
3
10 m
3
10 m
3
10 m
3
100 m
3
100 m
3
100 m
3
100 m
3
100 m
3
1000 m
3
1000 m
3
1000 m
3
1000 m
3
1000 m
3
1000 m
3
1000 m
3
10000 m
3
10000 m
3
10000 m
3
10000 m
3
10000 m
3
10000 m
3
10000 m
3
10000 m
3
10000 m
3
10 m
3
100 m
3
100 m
3
100 m
3
100 m
3
100 m
3
1000 m
3
1000 m
3
1000 m
3
1000 m
3
1000 m
3
10000 m
3
10000 m
3
10000 m
3
10000 m
3
10000 m
3
10000 m
3
10000 m
3
100000 m
3
100000 m
3
100000 m
3
100000 m
3
100000 m
3
100000 m
3
100000 m
3
100000 m
3
100000 m
3
0.004418 dm
3
0.012272 dm
3
0.020106 dm
3
0.031416 dm
3
0.049087 dm
3
0.082958 dm
3
0.125664 dm
3
0.196350 dm
3
0.306796 dm
3
0.441786 dm
3
0.785398 dm
3
1.22718 dm
3
1.76715 dm
3
2.40528 dm
3
3.14159 dm
3
3.97608 dm
3
4.90874 dm
3
7.06858 dm
3
9.62113 dm
3
12.5664 dm
3
15.9043 dm
3
19.6350 dm
3
28.2743 dm
3
38.4845 dm
3
50.2655 dm
3
63.6173 dm
3
78.5398 dm
3
Caution!
Work with this table only when you have turned switch No. 3 to “OFF” (SI units).
(f
max
= 400 Hz
at v = 10 m/s)
b
a
028y
t4
4. Operation and Commissioning Promag 31
34 Hauser