eutech-instruments waterproof c401 colorimeter Manual Do Utilizador

Calibration: pH

 

 

C401/301/201/102/101 

 

 

 

30

1. 

Ensure at least 10 ml of clear pH7.0 buffer is available. 

2. 

Ensure the meter is switched off. 

3.  Press and hold the ZERO key while switching the meter on by 

pressing the ON/OFF key. The meter will momentarily flash the 
model number and then display the CAL annunciator at the top left 
corner of the screen indicating the instrument is in calibration mode. 

4. 

Press the MODE key repeatedly until [PH] is displayed. 

OFF

ON

ZERO

MODE

Press Mode 
to select test 
parameter of  

“PH”   

 

5. 

Press the READ/ENTER key to confirm the selected test. The meter 
will display [bLNK] indicating it is waiting for a 
blanking sample.  

6. 

Select a clean vial, un-screw the cap and fill with de-ionised water to 
the line on the vial.  Replace the cap, ensuring it is screwed on finger 
tight to the vial. 

7. 

Ensure the outside of the vial is clean, dry and absent of any marks 
or finger-prints. Gently push the vial fully into sample well of the 
instrument, whilst aligning the ▼ mark on the vial with the ▲ mark on 
the meter. 

8.  Press the ZERO key to blank the meter to that vial; the meter will 

read [ZERo] whilst this is taking place. 

9. 

Remove the blanking vial from the meter.  

10.  The meter displays 7.0 pH, with the CAL annunciator on the top left 

corner. 

ZERO

pH