Myron-l PT1 User Manual download pdf (Page 5)

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IV. Calibration

The PT1 is designed to be very reliable and requires only infrequent

calibration. The Myron L Company recommends calibrating each

measurement mode you use once monthly. However, you should

check the calibration whenever measurements are not as expected.

The PT1 is programmed for 2 calibration options: Wet Calibration

or Factory Calibration. Wet calibration is most accurate. But if a

high quality standard KCl-1800 µS or 442-3000 ppm solution is not

available, the PT1 can be returned to factory settings.

A. Wet Calibration

Use calibration solution specied for measurement mode: Use KCL-

1800 for Cond KCl; Use 442-3000 for tdS 442, SALt 442, tdS NaCl,

and SALt NaCl. See Specications table for 442 solution ppm NaCl

equivalent value. Calibrating tdS simultaneously calibrates SALt for

the same value and vice versa.

1. Pour Myron L Company calibration solution into a clean container.

2. Rinse the pen 3 times by submerging the cell in fresh calibration

solution and swirling it around.

3. Remove pen from solution, then ll the container one more time.

4. Press and release the push button. The LCD will briey display the

rmware version then the current measurement mode. Ensure the

PT1 is in the correct solution mode.

5. Immediately push and hold the push button. The display will scroll

through “CAL”, “SOL SEL”, “FAC CAL”, “ºCºF TEMP”, and “ESC”. Release

the button when “CAL” displays.

6. Grasp the pen by its case with your ngers positioned between the

display and the pen cap to avoid sample contamination.

7. While the LED ashes rapidly, dip the pen in calibration solution so that the

cell is completely submerged. If you do not submerge the cell in solution

before the ashing slows, allow the pen to power off and start over.

8. While the LED ashes slowly, swirl the pen around to remove

bubbles, keeping the cell submerged. Keep pen at least 1 inch

(2½ cm) away from sides/bottom of container.

9. When the LED light stays on solid, remove the pen from the solution.

“CAL SAVED” will display indicating a successful calibration.

NOTE: If an incorrect solution is used or the measurement is NOT

within calibration limits for any other reason, “Error” displays alternately

with “CLEAn CEL/CHEC SOL”. Check to make sure you are using the

correct calibration solution. If the solution is correct, clean the cell by

submerging the cell in a 1:1 solution of Lime-A-Way® and water for 5

minutes. Rinse the cell and start over.

10. Small bubbles trapped in the cell can give a false calibration. Measure

the calibration solution again to verify correct calibration. If the reading

is not within ±1% of the calibration solution value, repeat calibration.

B. Factory Calibration

If you do not have the proper calibration solution or wish to restore the

pen to its original factory settings for any other reason, use the FAC

CAL function to calibrate the PT1.

1. Press and release the push button. The LCD will briey display the

rmware version then the current measurement mode.

2. Immediately push and hold the push button. The display will scroll

through “CAL”, “SOL SEL”, “FAC CAL”, “ºCºF TEMP”, and “ESC”. Release

the button when “FAC CAL” displays.

3. While the display scrolls through “PUSHnHLD” and “FAC CAL”, push

and hold the push button until the display scrolls through “SAVEd” and

“FAC CAL”, indicating the pen has been reset to its factory calibration.

4. Allow the pen to time out to turn power off.

MYRON L COMPANY

2450 Impala Drive

Carlsbad, Ca 92010-7226

Phone: +1-760-438-2021

Customer Service E-Mail: [email protected]

Technical Support E-Mail: [email protected]

Website: www.myronl.com

MADE IN U.S.A.

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