Hach sensION+ pH3 - Recognized Buffers; Maintenance; Cleaning the Instrument

6. Maintenance
6.1. Clean the instrument
Important note: Never use cleaning such as turpentine, acetone
or similar products to clean the instrument including the display
and accessories.
Only clean the housing and accessories using a soft, damp cloth.
Mild soap solution may also be used. Dry the cleaned parts care-
fully with a soft cotton cloth.
CAUTION
When using chemicals or solvents, comply with the instruc-
tions of the producer and all local safety regulations.
6.2. Sensor cleaning
See the manual of the sensor in use.
4.7. Recognized buffers
Buffer solutions
The sensION
™
+ PH 3 has in memory the following data (pH
values as a function of the temperature).
Technical buffers (DIN 19267)
4. Operation
9
ENGLISH
ºC ºF pH mV
0 32 2.01 4.01 7.12 9.52 11.45 --
10 50 2.01 4.00 7.06 9.38 11.20 245
20 68 2.00 4.00 7.02 9.26 11.00 228
25 77 2.00 4.01 7.00 9.21 10.90 220
30 86 2.00 4.01 6.99 9.16 10.81 212
40 104 2.00 4.03 6.97 9.06 10.64 195
50 122 2.00 4.06 6.97 8.99 10.48 178
60 140 2.00 4.10 6.98 8.93 10.23 160
70 158 2.01 4.16 7.00 8.88 10.19 142
80 176 2.01 4.22 7.04 8.83 10.06 --
90 194 2.01 4.30 7.09 8.79 9.93 --