Thermo Fisher Scientific C101 Colorimeter - Manual (Page 48)

Calibration: Cyanuric Acid
C401/102 Colorimeter
44
Shake for
1 minute
Cyanuric
Acid
Sample
70 ppm
ppm
READ
ENTER CAL
CAL
MODE
READ
ENTER
Press Mode to
select another
calibration test
ZERO
Press ZERO to
return to
measurement
mode
CAL
11. Select another clean vial, un-screw the cap and fill it with 10 ml of the
prepared Cyanuric Acid standard solution (fill up to the line on the
vial).
12. Select a Cyanuric Acid Reagent Sachet. Open the sachet and tip the
contents into the vial containing the calibration standard.
13. Replace the cap, ensuring it is screwed on finger tight
to the vial. Shake the vial for approximately one
minute, until the powder has dissolved.
Note: a small amount of the powder may remain un-dissolved in the vial, but
this will not affect the measurement.
14. 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.
15. Wait for two minutes, then press the READ/ENTER key within five
minutes from the time the Cyanuric Acid reagent was added to the
vial.
16. 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.
17. Press the READ/ENTER key. The meter will now accepts the
calibration value and momentarily display [HoLD] and CAL
annunciator before returning to the beginning of the calibration as in
step 3.
18. To continue with another calibration, press the MODE key to select
the desired calibration mode (for multi-parameter colorimeter).
19. To exit the calibration mode, press the ZERO key to return to the
measurement mode.