2—18
User-Entered Calibration, continued
2. Follow the procedure for the chemical method to be calibrated. Prepare a
reagent blank (if needed) and a standard solution. Allow the color to
develop fully.
3. Insert the reagent blank or deionized water into the meter and cover with
the cap. Press the
ZERO/SCROLL key. The meter will display “- - - -”,
followed by “0.000”. This initializes (zeroes) the meter.
4. Press the
MENU key and hold it down until the display shows “USER”,
followed by “CAL”. Press
READ/ENTER to enter the calibration mode.
5. In factory-calibrated meters, S0 will appear in the display.
Note: When recalibrating a factory-calibrated meter or range, RES (resolution)
cannot be changed.
6. In uncalibrated meters or meters with ranges labeled Abs, “RES” will
appear. Press
ZERO/SCROLL to review the current resolution (decimal
placement). Press
ZERO/SCROLL again to accept the current resolution. To
change the resolution, press
READ/ENTER, then ZERO/SCROLL to change the
resolution. Press
READ/ENTER to accept the new resolution. “S0” will
appear on the display.
7. Press the
READ/ENTER key again, then enter the blank value.
5957088.book Page 18 Friday, March 22, 2013 3:54 PM
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