Xylem 6-Series Multiparameter - Manual (Page 43)

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-37
Table 6 6600V2-4 Sonde with Standard Long Calibration Cup****
Probe to Calibrate Upright Inverted
Conductivity 525ml 150ml
pH/ORP 500ml 150ml
All Optical Sensors 425ml DO NOT CALIBRATE***
Table 7 600 OMS V2-1 Sonde* *
Probe to Calibrate Upright Inverted
Conductivity 375ml N/A
Turbidity, Chlorophyll, Rhodamine WT 350ml N/A
Table 8 600R and 600QS Sondes
Probe to Calibrate Upright Inverted
Conductivity 350ml N/A
pH/ORP 120ml N/A
* See section below for special instructions dealing with calibration of 6136 turbidity sensor.
** See section below for special instructions dealing with calibration of the conductivity sensor for the 600
OMS V2-1.
*** Optical Sensors CANNOT be calibrated with the sonde in the Upside-Down position because of
interference from the meniscus of the calibration standard.
**** An extended length calibration cup is supplied with the 6600V2-4, 6600V2-2, and 6600EDSV2-2 to
facilitate calibration of the 6136 turbidity sensor. This cup requires the use of larger volumes of other
calibration solutions. Users may choose to purchase the shorter calibration cup sleeve for calibration of
sensors other than the 6136 to reduce the volumes of calibrant. The shorter cal cup sleeve is YSI Item
Number 066267 and can be obtained by contacting YSI Technical Support.
CALIBRATION OF THE 6136 TURBIDITY SENSOR
The 6136 can be calibrated using either the calibration cup supplied with the sonde or with an extended length
calibration cup which can be purchased as an option for the 6820V2-1 and 6920V2-1. An extended cup is
supplied as a standard item with the 6820V2-2, 6920V2-2, 6600V2-4, 6600V2-2, and 6600EDSV2-2 sondes.
If you choose to calibrate with the short calibration cup, you also MUST first make certain that the vessel is
equipped with a BLACK bottom. In addition, you should engage only ONE THREAD when screwing the
calibration cup onto the sonde in order to keep the turbidity probe face as far as possible from the calibration
cup bottom to avoid interference. Even with these techniques, there will still be a small interference from the
bottom of the calibration cup that will cause your field turbidity readings to be approximately 0.5 NTU lower
than the actual reading. This small error is usually only evident when the sonde is deployed in very clear water
where the readings might appear as slightly negative values, e.g., a turbidity of 0.1 NTU would appear as –0.4
NTU.
Use of the extended length cup will require the use of significantly more standard solutions for 6820V2-1/
6920V2-1 sondes (additional 180 mL) if calibration is done in the upright position. To minimize
calibration solution volumes for sensors other than turbidity, users may wish to purchase the shorter
calibration cup sleeve which is supplied as standard with the 6820V2-1 and 6920V2-1. The shorter cal cup
sleeve for any 6600 is Item Number 066267, and the shorter cal cup sleeve for any 6820/6920 is Item
Number 069286. These can be ordered from YSI Technical Support.