YSI 600DW-B Sonde - Manual (Page 34)

Sondes Section 2
9 Insure that all sensors are immersed in calibration solutions. Many of the calibrations factor in
readings from other probes (e.g., temperature probe). The top vent hole of the conductivity sensor must
also be immersed during calibrations.
CALIBRATION TIPS
1. The key to successful calibration is to insure that the sensors are completely
submersed when calibration values are entered. Use recommended volumes
when performing calibrations.
2.
For maximum accuracy, use a small amount of previously used calibration
solution to pre-rinse the sonde. You may wish to save old calibration
standards for this purpose.
3.
Fill a bucket with ambient temperature water to rinse the sonde between
calibration solutions or perform the calibration near a sink where the probes
can be rinsed from the tap.
4.
Have several clean, absorbent paper towels or cotton cloths available to dry
the sonde between rinses and calibration solutions. Shake the excess rinse
water off of the sonde, especially when the probe guard is installed. Dry off
the outside of the sonde and probe guard. Making sure that the sonde is dry
reduces carry-over contamination of calibrator solutions and increases the
accuracy of the calibration.
5.
If you are using laboratory glassware for calibration, you do not need to
remove the probe guard to rinse and dry the probes between calibration
solutions. The inaccuracy resulting from simply rinsing the probe
compartment and drying the outside of the sonde is minimal.
6. Make certain that port plugs are installed in all ports where probes are not
installed. It is extremely important to keep these electrical connectors dry.
USING THE CALIBRATION CUP
Follow these instructions to use the calibration cup for calibration procedures with the 6920DW and
600DW-B sondes..
9 Ensure that a gasket is installed in the gasket groove of the calibration cup bottom cap, and that the
bottom cap is securely tightened. Note: Do not over-tighten as this could cause damage to the threaded
portions of the bottom cap and tube.
9 Remove the probe guard, if it is installed.
9 Inspect the installed gasket on the sonde for obvious defects and if necessary, replace it with the extra
gasket supplied.
9 Screw cup assembly into place on the threaded end of sonde and securely tighten. Note: Do not over
tighten as this could cause damage to the threaded portions of the bottom cap and tube.
9 Sonde calibration can be accomplished with the sonde upright or upside down. A separate clamp and
stand, such as a ring stand, is required to support the sonde in the inverted position.
YSI Incorporated Drinking Water Monitoring Systems Operations Manual 2-27