Xylem 6-Series Multiparameter - Manual (Page 44)

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-38
NOTE CAREFULLY: All optical sensors MUST be calibrated in the upright position no matter which type
of calibration cup is employed. In the upside-down position, the meniscus of the standard causes a great
deal of interference and this interference is likely to result in calibration errors and/or erroneous field
readings.
CALIBRATION OF 600 OMS V2-1 CONDUCTIVITY SENSOR
In order to conserve calibration solution, the 600 OMS V2-1conductivity sensor should be calibrated with
the optical probe removed and the optical port plug securely tightened. The volume of conductivity
solution provided in Table 7 above reflects this special condition. In addition, it is recommended that the
sonde be shaken vigorously after immersion in the conductivity reagent to assure that bubbles are expelled
from the cell.
An instruction sheet dealing in greater detail with the special requirements for calibration of 600 OMS V2-
1sensors is included with the sonde. Be sure to read the instructions carefully before using the sonde.
2.6.2 CALIBRATION PROCEDURES
The following calibration procedures are the most commonly used methods for the 6-series sensors. For
detailed information on all calibration procedures, refer to Section 2.9.2, Calibrate.
To ensure more accurate results, you can rinse the calibration cup with water, and then rinse with a small
amount of the calibration solution for the sensor that you are going to calibrate. Discard the rinse solution
and add fresh calibrator solution. Use tables 1-8 to find the correct amount of calibrator solution.
1. Carefully immerse the probes into the solution and rotate the calibration cup to engage several
threads. YSI recommends supporting the sonde with a ring stand and clamp to prevent the sonde
from falling over.
2. With the proper cable, connect the sonde to a PC, access EcoWatch for Windows and proceed to
the Main menu (for information on how to run EcoWatch for Windows software, see Section
2.4.2, Running EcoWatch Software). From the sonde Main menu, select 2-Calibrate.
---------------Calibrate--------------
1-Conductivity 6-ISE3 NH4+
2-Dissolved Oxy 7-ISE4 NO3-
3-Pressure-Abs 8-Optic T-Turbidity-6026
4-ISE1 pH 9-Optic C-Chlorophyll
5-ISE2 ORP
Select option (0 for previous menu):