Xylem YSI TruLine ORP 50 Instrucciones De Operación página 7

TruLine
Conversion to the
standard hydrogen
electrode potential
T 814241 04/2014
 Make sure the immersion depth is correct. The junction must be complete-
ly submersed in the solution. The junction is in the area of the bottom end
of the shaft (see arrow).
The level of the reference electrolyte must be at least 2 cm above the level
of the solution.
U = U + U
H Meas Ref
where: U = ORP voltage, relative to the
H
U = measured ORP voltage
Meas
U = voltage of the reference system relative to the
Ref
U is temperature dependent and can be taken from the following table
Ref
(also refer to DIN 38404-6):
T (°C)
U [mV]
Ref
TruLine ORP 50
0 +224
5 +221
10 +217
15 +214
20 +211
25 +207
30 +203
standard hydrogen electrode
standard hydrogen electrode
T (°C)
35
40
45
50
55
60
Commissioning, measuring, testing
U [mV]
Ref
TruLine ORP 50
+200
+196
+192
+188
+184
+180
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