Ysi 556 MPS Bedienungsanleitung PDF herunterladen (Seite 39)

Calibrate Section 6

YSI Incorporated YSI 556 MPS

Page 33

6.1.2 Calibration Tips

1. If you use the Transport/Calibration Cup for dissolved oxygen

(DO) calibration, make certain to loosen the seal to allow

pressure equilibration before calibration. The DO calibration

is a water-saturated air calibration.

2. When calibrating pH, always calibrate with buffer 7 first,

regardless if performing a 1, 2, or 3 point calibration

3. The key to successful calibration is to ensure that the sensors

are completely submersed when calibration values are

entered. Use recommended volumes when performing

calibrations.

4. For maximum accuracy, use a small amount of previously

used calibration solution to pre-rinse the probe module. You

may wish to save old calibration standards for this purpose.

5. Fill a bucket with ambient temperature water to rinse the

probe module between calibration solutions.

6. Have several clean, absorbent paper towels or cotton cloths

available to dry the probe module between rinses and

calibration solutions. Shake the excess rinse water off of the

probe module, especially when the probe sensor guard is

installed. Dry off the outside of the probe module and probe

sensor guard. Making sure that the probe module is dry

reduces carry-over contamination of calibrator solutions and

increases the accuracy of the calibration.

7. If you are using laboratory glassware for calibration, you do

not need to remove the probe sensor guard to rinse and dry the

sensors between calibration solutions. The inaccuracy

resulting from simply rinsing the sensor compartment and

drying the outside of the guard is minimal.

8. If you are using laboratory glassware, remove the stainless

steel weight from the bottom of the probe sensor guard by

turning the weight counterclockwise. When the weight is

removed, the calibration solutions have access to the sensors

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Ysi 556 MPS Bedienungsanleitung Seite 39