eutech-instruments waterproof c401 colorimeter Manuel D’Utilisation

Measurement: pH

 

 

C401/301/201/102/101 

 

 

 

20

Invert several 
times to mix. 

Add 20 drops of pH Indicator
(Phenol Red) reagent 

     pH
Indicator
  Phenol
    Red

 

9. 

Gently push the vial back fully into the sample well of the instrument, 
whilst again aligning the ▼ mark on the vial with the ▲ mark on the 
meter. 

10.  Wait for 1 minute and then press the READ/ENTER key within 3 

minutes from when the time the reagent was added to the vial. 

11.  The meter will flash [PH] whilst the measurement is taken.  It will then 

display the pH of the solution in pH units. 

READ

ENTER

pH