YSI 900 Chlorine Colorimeter - Manual (Page 19)

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ENGLISH
FaCtOrY CaliBratiOn reset
cAL
SEL
SEL
CAL
CAL
SEL
Resetting the user calibration to the original factory calibration will reset all meth-
ods and ranges.
A user calibrated method is indicated by a "Cal" symbol while the test result is
displayed.
To reset the calibration press both the [MODE] and [ZERO/TEST] key
and hold.
Turn the unit on using the [ON/OFF] key.
Release the [MODE] and [ZERO/TEST] keys after approx. 1 second.
The following messages will appear will flash on the display:
The factory setting is active.
(SEL stands for Select)
or:
Calibration has been set by the user.
(If the user calibration is to be retained, turn the unit off using the
[ON/OFF] key).
Calibration is reset to the factory setting by pressing the [MODE] key.
The following messages will appear in turn on the display:
CAL for factory calibration; cAL for user calibration.
Turn the unit off using the [ON/OFF] key.
Mode
On
Off
Mode
On
Off
Zero
Test
RESULT Cal
Store Date
Print Time