SenTix
®
HW-T 900(-P)
Technical data
9
ba77090s02
01/2017
If you want to clean and rinse the ground junction, you can open it as follows:
completely unscrew the ground stopper (see figure on page 5).
After cleaning
Rinse the electrode with deionized water and condition it in reference elec-
trolyte solution for at least 1 hour. Then recalibrate the electrode.
6
Technical data
Contamination
Cleaning procedure
Fat and oil
Rinse with water containing household
washing-up liquid
Lime and hydroxide depos-
its
Rinse with citric acid (10 % by weight)
Proteins
Immerse in pepsin cleaning solution PEP/pH
for approx. 1 hour.
Note: Make sure the level of the reference
electrolyte is above that of the cleaning solu-
tion.
Hydrofluoric acid, hot phosphoric acid and strong alkaline solu-
tions destroy the glass membrane.
Measurement
pH measuring range
0.000 ... 14.000
Allowed temperature range
0 ... 60 °C
Accuracy of the
IDS measuring
technique
Measured parameter
Accuracy (± 1 digit)
pH
± 0.004
U [mV]
± 0.2
T [°C]
± 0.1
General features
Reference electrolyte
KCl 3 mol/L, Ag
+
free
Junction
Ground
Temperature sensor
Integrated NTC 30
(30 k
at 25 °C / 77 °F)
Connection cable
Lengths
SenTix
®
HW-T 900: 1,5
SenTix
®
HW-T 900-P:
1,5 / 3 / 6 / 10 / 15 / 25 / 40 / 60 / 100 m
Diameter
4.3 mm
Smallest allowed
bend radius
Fixed installation:20 mm
Flexible use:60 mm
Summary of Contents for WTW SenTix ORP-T 900-P
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