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Figure 58 Calibrate PC RFU
8. Rinse the sensors, calibration cup, and sensor guard 2-3 times with
a small amount of standard #2. Discard the standard after each
rinse. Blot the sensor dry with a lint-free cloth.
NOTE: For standard #2, use the 0.625 mg/L Rhodamine WT
solution when calibrating chlorophyll (RFU or µg/L) on
either TAL sensor, or when completing a PC (RFU or µg/L)
calibration on a TAL-PC sensor. Use the 0.025 mg/L
Rhodamine WT solution when completing a PE (RFU or
µg/L) calibration on a TAL-PE sensor.
9. Fill the calibration cup to the appropriate level with standard #2.
Immerse the sensors in the second calibration standard.
10. Observe the temperature reading on the calibration display
(Figure 58). Use the table in the
preparation section on page 46
for the calibration standard.
11. Select Calibration Value and enter the value of the second
calibration standard.
12. Observe the actual measurement readings for stability (white line
on graph shows no significant change for 40 seconds), then select
Accept Calibration. The procedure will automatically finish after
calibrating using the second standard.
Calibration
Rhodamine WT dye solution
to identify the appropriate value
49
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