YSI 5200 - Manual (Page 68)

YSI Incorporated 66 5200 Recirculating System Monitor
6.2.3 Conductivity Calibration
This procedure calibrates conductivity and salinity. Note that the 5200 is calibrated at the factory and,
with proper sensor maintenance, calibration is rarely required. However, from time to time it is wise to
check the conductivity calibration and recalibrate when necessary.
Calibration
Display Actual Value " " Current T emp Value
Scrolling T ext*
Calibration
Complete
G et UserValue
Figure 6-2 Conductivity Calibration Menu
1. Go to the Conductivity calibrate screen as described in Section 6.2.1 Accessing the Calibrate
Screen. The current conductivity and temperature are displayed, along with a message on the
bottom line of the screen.
1 1 2 6 u S * T = 2 5 . 4 °
W a i t t i l S t a b l e
Figure 6-3 Conductivity Calibration Screen
NOTE: An asterisk next to the conductivity value indicates temperature compensation.
2. Place the correct amount of conductivity standard (see Table 6-1 Calibration Volumes) into a
clean, dry or pre-rinsed calibration/storage cup.
WARNING: Calibration reagents may be hazardous to your health. See Section 18 Health and
Safety for more information.
NOTE: Before proceeding, ensure that the sensor is as dry as possible. Ideally, rinse the
conductivity sensor with a small amount of standard that can be discarded. Be certain that you
avoid cross-contamination of solutions. Make certain that there are no salt deposits around the
oxygen or pH/ORP sensors, particularly if you are employing standards of low conductivity.
3. Carefully immerse the sensor end of the probe module into the solution.
4. Gently rotate and/or move the probe module up and down to remove any bubbles from the
conductivity cell.
Indicates temperature compensation