Xylem 6-Series Multiparameter - Manual (Page 41)

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-35
6. 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.
7. 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 all of the instruments
except the 600R, 600QS, and 600 OMS V2-1. For these sondes, the over-the-guard bottle that comes with
your sonde, must be used.
 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.
 Remove the probe guard, if it is installed.
 Inspect the installed gasket on the sonde for obvious defects and if necessary, replace it with the extra
gasket supplied.
 Screw the 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.
 Sonde calibration can be accomplished with the sonde upright– i.e. the cable connector end of the
sonde is oriented above the probe end, or inverted where the orientation is reversed. A separate clamp
and stand, such as a ring stand, is required to support the sonde in the inverted position.
 When using the Calibration Cup for dissolved oxygen calibration in water-saturated air, make certain
that the vessel is vented to the atmosphere by loosening the bottom cap or cup assembly, depending on
orientation, and that approximately 1/8” of water is present in the cup.
NOTE CAREFULLY: If you are calibrating a 6136 turbidity sensor for use with a 6820V2-1 or 6920V2-1,
you can use either the calibration cup supplied with your sonde or an optional extended length cup for the
calibration. Please see the section below which describes the special calibration recommendations for this
sensor.