YSI 9500 Photometer - Manual (Page 16)

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The format of the user calibration file is as follows :-
• The file must start with ‘USER CALIBRATION’ and end with ‘END’.
• Test Number must be between 900-929 (30 tests).
• Test name, up to 18 characters.
• Units. Must be one of the following - mg/l, ppm, mmol/l, µmol/l or g/l.
• Wavelength. Choose one –
450 nm, 500 nm, 550 nm, 570 nm, 600 nm or 650 nm .
• Chemical symbols: up to 8 characters.
• Data pairs. Up to 10 pairs of data in the form :-
ABSORBANCE x.xxx, CONCENTRATION (Concentration may be up to five digits).
An example is shown below :-
USER CALIBRATION
900
Chlorine
mmol/l
500nm
Cl2
0,0
0.174,0.50
0.481,1.50
0.733,2.50
0.854,3.00
1.022,4.00
1.086,4.50
1.187,5.00
END
CARE AND MAINTENANCE
The photometer is designed to give long and trouble-free operation. Spills and
moisture should be wiped off immediately with a dry cloth. Avoid solvents or
abrasive materials be used to clean the instrument. Care should be taken to
keep the test chamber clean.
Cleaning the Optics
Any build-up of dirt or deposits may interrupt light transmission and affect
readings. To clean the optics, undo the two screws on the bottom of the
instrument and set aside to remove the optics base plate. Gently clean the
internal surfaces of the optics with a soft, non-abrasive cloth. Deposits may be
removed with a slightly dampened cotton ball. Replace the optics base plate
and tighten the screws.