Thermo Fisher Scientific CyberScan CON 10/CON 100/CON 200 User Manual

Page 19

8. Use

the

key for CyberScan CON 10, or MI/

or MR/

key for CyberScan 200 to

scroll up or down respectively to the value of the standard solution at 25

Press the ENTER/RANGE key to confirm the calibration. The CAL indicator will stop

flashing and remains on the screen for 3 seconds. Then the meter switches back into the

measurement mode and the calibrated value, compensated to the current temperature, is

shown on the display.

The display will now show 706 ppm that is the correct value of the standard solution at 27

C. Measurements can be performed now.

10. To exit from this process without confirming the calibration, press the CAL/MEAS key.

For calibration in the other ranges (maximum: 5 ranges for CON 200 only) repeat steps of the

procedure as outlined in Method 1, this time using a solution with a TDS of a different range.

Error upon confirmation

If an ERR error message appears, it probably means that the meter does not allow the slope

adjustment that has been made via the calibration procedure given the value of the

conductivity-to-TDS conversion factor currently in the memory.

If you are using CyberScan CON 200 meter, consider Method 2 of the TDS calibration. Press

the CAL/MEAS key to escape the ERR message and abort the calibration attempt.

Inaccuracies after calibration

If the TDS value is not within 2 digits of the TDS standard solution value at 25

C or 20

(depending upon which value was selected in the SETUP), an adjustment of either of the

following is required.

•

Temperature coefficient

•

Calibration

•

Conductivity-to-TDS conversion factor (see Method 2)