Hach POCKET COLORIMETER II Instruction Manual page 72

User-Entered Calibration,
3. Insert the reagent blank or deionized water into the meter and cover with the
cap. Press the
"0.000". This initializes (zeroes) the meter.
4. Press the
MENU
by "CAL". Press
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
ZERO/SCROLL
press
READ/ENTER,
READ/ENTER
7. Press the
READ/ENTER
Note: Press the
change the number.
8. After completing entry of the blank value, press the
display will show "A0".
key. The meter will display "- - - -", followed by
ZERO/SCROLL
key and hold it down until the display shows "USER", followed
to enter the calibration mode.
READ/ENTER
to review the current resolution (decimal placement). Press
again to accept the current resolution. To change the resolution,
then
ZERO/SCROLL
to accept the new resolution. "S0" will appear on the display.
key again, then enter the blank value.
key to move from digit to digit. Use the
READ/ENTER
continued
to change the resolution. Press
2—18
ZERO/SCROLL
key. The
READ/ENTER
key to