Xylem Sentix ORP 900 User Manual
Page 5
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SenTix
Commissioning, measuring, checking
15
ba75845e01
08/2009
At the same time, the level of the reference electrolyte must be at least 2
cm above the level of the solution.
Conversion to
normal hydrogen
electrode
U
H
= U
Meas
+ U
Ref
U
Ref
is temperature dependent and can be taken from the following table (see
also DIN 38404-6):
SenTix
®
ORP 900
with:
U
H
= ORP, referring to the normal hydrogen electrode
U
Meas
= Measured ORP
U
Ref
= Voltage of the reference system compared to the normal
hydrogen electrode
T (°C)
T (°F)
U
Ref
[mV]
T (°C)
T (°F)
U
Ref
[mV]
SenTix
®
ORP 900
SenTix
®
ORP 900
0
32
+224
35
95
+200
5
41
+221
40
104
+196
10
50
+217
45
113
+192
15
59
+214
50
122
+188
20
68
+211
55
131
+184
25
77
+207
60
140
+180
30
86
+203
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