63
13 Eliminating faults and malfunctions
Example 2
The measuring transmitter is to show 500 mS:
To achieve a display of 500 mS/cm, the resistance loop (with 3 turns) must
have a resistance of 112.5 Ohm.
Precalculated
values
Test
sequence
✱
Calculate the test resistance.
✱
Wire up the device, see Chapter 7 "Installation", Page 25.
✱
Select the corresponding measurement range, see Chapter 10.6.1
"CONDUCTIVITY IN (Conductivity input)", Page 37 -> RANGE 1 — 4
✱
Set TC to 0%/°C, see Chapter 10.6.1 "CONDUCTIVITY IN (Conductivity
input)", Page 37 -> TEMPCO
✱
Fit the resistance loop as shown in the diagram.
R =
3
2
·6.25 1/cm
= 112.5
Ω
500·10
-3
S/cm
Required display
Number of
turns
Required resistance
0 µS/cm
0
no resistance
625 µS/cm
1
10000
Ω
1000 µS/cm
1
6250
Ω
2000 µS/cm
1
3125
Ω
5000 µS/cm
1
1250
Ω
10 mS/cm
1
625
Ω
20 mS/cm
1
312.5
Ω
50 mS/cm
3
1125
Ω
100 mS/cm
3
562.5
Ω
200 mS/cm
3
281.3
Ω
500 mS/cm
3
112.5
Ω
1000 mS/cm
3
56.3
Ω
2000 mS/cm
3
28.1
Ω
Содержание 202755/20
Страница 19: ...19 6 Mounting 6 2 Head mounted transmitter Installation variations...
Страница 20: ...6 Mounting 20 6 3 Split version separate sensor Transmitter head Drilling jig for wall mounting...
Страница 21: ...21 6 Mounting Sensor component...
Страница 35: ...35 10 Operation 10 4 Principle of operation Operation in levels...
Страница 71: ......