DO700-en-GB_v2.3 3/15
7
Testing the pH of a Sample
1. Perform the pH Calibratoin as described above
2. Rinse and dry the pH Probe and submerge it in a sample liquid
3. Stir the solution briefly with the probe and allow it to stand until the display stabilizes
4. Note that the closer the temperature of the sample solution to the calibration solution, the more
accurate readings
Programming pH Parameters
The Table below shows the available programming menu items P1 ~ P7. Each parameter is
explained in detail in the subsequent sections.
Parameters Code Selections
P1 pH buffer solution series selection
s ol
USA (Europe &
U.S.A)
NIS (NIST)
CH (China)
P2
Distilled water pH temperature
compensation setting (see notes
below this Table)
OFF / ON
P3
Distilled water with Ammonia pH
temperature compensation setting
(see Notes below this Table)
OFF / ON
P4 Temperature unit setting
℃ / ℉
P5 Back light display time setting
0-1-3-6min
P6 Auto power off setting
0-10-20min
P7 Restore to default factory settings OFF / ON
Notes on P2 and P3 Parameters: Measurements of distilled water and distilled water mixed with
ammonia affect the temperature compensation and the slope linearity of the pH probe. Such
measurements are sometimes used in the electrical power and petrochemical industries. Set these
parameters to ON only if necessary, otherwise leave these parameters in the OFF state.
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