YSI TruLine ORP 51 - Manual (Page 7)

7 T 814246 04/2014
TruLine Commissioning, measuring, testing
Conversion to the
standard hydrogen
electrode potential U
H
= U
Meas
+ U
Ref
where: U
H
= ORP voltage, relative to the
standard hydrogen electrode
U
Meas
= measured ORP voltage
U
Ref
= voltage of the reference system relative to the
standard hydrogen electrode
U
Ref
is temperature dependent and can be taken from the following table
(also refer to DIN 38404-6):
T (°C) U
Ref
[mV]
TruLine ORP 51
T (°C) U
Ref
[mV]
TruLine ORP 51
0 +221 35 +187
5 +216 40 +181
10 +212 45 +176
15 +207 50 +171
20 +202 55 +165
25 +197 60 +160
30 +192