《rrbysi600qscalproced&worksheets》由会员分享，可在线阅读，更多相关《rrbysi600qscalproced&worksheets（10页珍藏版）》请在金锄头文库上搜索。
1、Red River Basin Monitoring NetworkPage 1August 10, 2005Calibration of YSI QS 600 Series Sonde w/ 650 MDS HandheldGetting Ready To Calibrate Calibration Tips:1. If you use the calibration cup for dissolved oxygen (DO) calibration, make certain to loosen the seal to allow pressure equilibration before
2、 calibration. The DO calibration is a water-saturated air calibration.2. The key to successful calibration is to insure that the sensors are completely submersed when calibration values are entered. Set calibration standards out ahead of time in room where calibration is to occur for temperature sta
3、bility.3. For maximum accuracy, use previously used calibration solution to pre-rinse the sonde. You may wish to save used or expired calibration standards for this purpose.4. Fill a bucket or sink with ambient temperature tap water to rinse the sonde between calibration solutions.5. Have several cl
4、ean, absorbent paper towels or cotton cloths available to dry the sonde between rinses and calibration solutions. Shake excess rinse water off the sonde, especially when the probe guard is installed. Dry off the outside of the sonde and probe guard. Drying the sonde reduces carry- over contamination
5、 of calibrator solutions and increases calibration accuracy.6. Remove the stainless steel weight from the sonde bottom by turning the weight counterclockwise. When the weight is removed, the calibration solutions have access to the sensors without displacing a lot of fluid. This also reduces the amo
6、unt of liquid that is carried between calibrations.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.YSI handheld and sonde equipment set-up prior to calibration and sampling Once this set-up i
7、s initially done, it will not be necessary to go through these set-up procedures each time calibration is done: 1. Press the Power (Green “”) button to turn the YSI 650 MDS handheld on. 2. From the “650 Main Menu” select Sonde menu. 3. From the “Main” menu screen scroll down and select Advanced. 4.
8、From the “Advanced Menu” scroll down and select Setup. 5. From the “Advanced Setup” menu ensure that Auto sleep RS232 and Auto sleep SD112 are not enabled. It is also suggested that Power up to Run be selected in this screen. 6. Press Escape twice to return to “Main” menu and select Report. 7. From
9、the “Report setup” menu scroll through and minimally enable by selecting the following: Temp C; SpCond uS/cm; DOsat %; DO mg/l; DO Charge; pH; and pH mV. Enable other options as per your instrument capabilities and your monitoring program reporting needs. 8. While selecting SpCond in the “Report set
10、up” menu, select “SpCond uS/cm” as the unit to display. 9. Press Escape and turn power off or begin calibration process. The sonde is now set up for calibration and sampling.Red River Basin Monitoring NetworkPage 2August 10, 2005CALIBRATION TIPS - CONDUCTIVITYCalibrate conductivity first to avoid co
11、ntamination of the standard.For maximum accuracy, the conductivity standard you choose should be within the same conductivity range as the water you are preparing to sample. However, it is not recommended to calibrate with conductivity standards that are less than 1.0 millisiemens/cm (mS/cm) which i
12、s equal to 1,000 microsiemens (S/cm). These low standards are easily contaminated and can be interfered with by outside noise sources (RF, etc.)TIP: During calibration for conductivity and pH, you may remove the stainless steel weight from the bottom of the sonde by unscrewing the weight countercloc
13、kwise. When the weight is removed, the calibration solutions have access to the sensors while displacing less fluid. This also reduces the amount of liquid that is potentially carried between calibrations.1. Remove the sponge from the calibration bottle and pour 1-2 inches of conductivity calibratio
14、n solution into the bottle. If you have used conductivity solution saved from your last calibration, you can use it for this rinsing process. Put the sonde in the bottle, screw the cap on firmly and shake the solution around to rinse the sonde and bottle. Unscrew the bottle and pour out the solution
15、. Repeat this rinse process once more and then do a third rinse with fresh conductivity calibration solution. 2. Fill the calibration bottle about full with fresh conductivity calibration solution. Insert the sonde back in the bottle. Gently rotate and/or move the sonde up and down to remove any bub
16、bles from the conductivity cell. The conductivity port in the side of the sonde must be completely submerged in calibration solution and not have any trapped bubbles in the opening.3. Allow at least one minute for temperature equilibrium before proceeding.4. With the YSI 650 MDS Handheld on, scroll to “Sonde menu” and press the Enter key.5. The handheld will make a sound that indicates you are actively connected to the sonde and its menus. From the
