YSI 3100 - Manual (Page 15)

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4. Gently tap the cell to remove any air bubbles and dip the cell in the solution 2 or 3 times to
ensure proper wetting. If using a flow through or fill cell, be certain it is completely full.
5. Allow at least 60 seconds for the temperature reading to become stable.
6. Press the [MODE] key until the instrument is in the conductivity mode that you want to
calibrate in as follows:
Temperature compensated conductivity (°C symbol flashing): This mode will
automatically compensate the calibration value to
25°C using a coefficient of 1.91%/°C.
Conductivity (°C symbol NOT flashing): This mode does NOT use temperature
compensation.
7. Press and release both the [UP ARROW] and [DOWN ARROW] keys at the same time.
10.12
mS
24.3 °C
CAL
The CAL symbol will appear at the bottom left of the display to indicate that the instrument is now
in Calibration mode.
8. Use the [UP ARROW] or [DOWN ARROW] key to adjust the reading on the display until
it matches the value of the calibration solution you are using. If you are calibrating in
temperature compensated conductivity mode, enter the value at 25°C. If you are calibrating in
conductivity mode (not temperature compensated), enter the value the calibration solution
should read at the current temperature (see Appendix B).
10.00
mS
24.3
°C
CAL
9. Once the display reads the exact value of the calibration solution being used, press the
[ENTER] key. The word “SAVE” will flash across the display for a second indicating that
the calibration has been accepted.
The YSI Model 3100 is designed to retain its last calibration permanently. Therefore, there is no
need to calibrate the instrument after power down.
CAL symbol
Calibration solution value