eutech-instruments waterproof c401 colorimeter Benutzerhandbuch

Calibration: Chlorine, Free & Total

 

 

C401/301/201/102/101 

 

 

 

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10.  Select another clean vial, un-screw the cap and fill it with 10 ml of 

the prepared Chlorine standard (fill up to the line on the vial).   

11.  Select a DPD Free sachet, or a DPD Total sachet, depending on 

the selected test.  Open the sachet and tip the contents into the vial 
containing the calibration standard. 

12.  Replace the cap, ensuring it is screwed on finger tight to 

the vial.  Invert the vial repeatedly for approximately 20 
seconds, until the powder has dissolved.  

13.  Insert the vial fully into the sample well of the meter, whilst again 

aligning the ▼ mark on the vial with the ▲ mark on the meter. 

14.  For Free Chlorine calibration, press the READ/ENTER key within 

two minutes from the time the sachet was added to the vial. As for 
Total Chlorine calibration, wait for two minutes before pressing the 
READ/ENTER key and this has to be done within five minutes from 
the time the sachet was added to the vial.  

15.  The meter will display [--Rd--] whilst the calibration standard is 

being measured and then displays [SAVE] to prompt for calibration 
acceptance and saving of calibration data. 

ppm

READ

ENTER

 

16.  Press the READ/ENTER key. The meter now accept the calibration 

value and momentarily display [HoLD] and CAL annunciator before 
returning to the beginning of the calibration as in step 4. 

17.  To continue with another calibration, press the MODE key to select 

the desired calibration mode. 

18.  To exit calibration mode, press ZERO key to return to the 

measurement mode. 

MODE

READ

ENTER

Press Mode to select 
another calibration test

ZERO

Press ZERO to return 
to measurement mode