YSI 900 Chlorine Colorimeter - Manual (Page 18)

18
Calibration Mode
user CaliBratiOn (Cal)
CAL
METHOD
0.0.0
METHOD
METHOD
CAL
After confirming the selection with the [MODE] key the instrument will
show CAL/"Method".
Scroll through methods using the [MODE] key.
Fill a clean vial with the standard up to the 10 ml mark, screw the cap on and
place the vial in the sample chamber making sure that the marks are aligned.
Press the [ZERO/TEST] key to zero/blank the instrument.
The method symbol (Cl2, Cl6, Cl8 or Cl10) flashes for approx. 8 seconds.
The display shows the following in alternating mode:
Perform calibration with a standard of known concentration (see "Operation").
Press the [ZERO/TEST] key to measure known standard concentration.
The method symbol (Cl2, Cl6, Cl8 or Cl10) flashes for approx. 3 seconds.
The result is shown in the display, alternating with CAL.
If the reading corresponds with the value of the calibration standard (within the
specified tolerance), exit calibration mode by pressing the [ON/OFF] key.
Changing the displayed value to match calibration standard value:
Pressing the [MODE] key once increases the displayed value by 1 digit.
Pressing the [ZERO/TEST] key once decreases the displayed value by
1 digit.
Press the corresponding key until the reading equals the value of the calibration
standard.
By pressing the [ON/OFF] key, the new correction factor is calculated and stored
in the user calibration software.
Confirmation of calibration (3 seconds).
CAL
cAL
Zero
Test
Zero
Test
Cal
Store Date
Print Time
CAL
RESULT + x
CAL
Mode
Zero
Test
RESULT
user calibration (Display in calibration mode)
factory calibration (Display in calibration mode)