Calibration Instructions

Notes:

Calibrate only with 1,413 µS/cm and 80,000 µS/cm solutions. Calibrating with other solutions will cause errors in readings. Do not let the probe rest on the bottom of the calibration cylinder.

Regular probe calibration is necessary. If, at any time, readings appear to be less accurate than usual, clean the probe thoroughly, then re-calibrate. A two point calibration should be performed prior to each measuring session. The TLC Meter automatically determines each solution being used. When measuring water of less than 10,000 µS/cm, better accuracy can be obtained if a further single point calibration at 1413 µS/cm is performed after the usual 2 point calibration.

Caution:

The 1413 µS/cm solution can be seriously affected by salts left on the probe. Clean probe thoroughly before 1413 µS calibration by rinsing in de-ionized water until the conductivity reading reaches about 20 µS.

 

Turn the meter on. Conductivity should be displaying ‘EC 0000u’.

Start with the 1413 µS/cm standard solution (Solinst P/N 101582).

Clean probe and sensors as described above and give a final rinse with the calibrating solution you are about to use.

Replace the shroud by rotating until it seats, then push to lock in place.

Immerse the probe in the calibration solution. Press and hold the ‘ON’ button until the next screen appears as ‘Press 2x for Off’.

Again press and hold the ‘ON’ button until the next screen appears as ‘Press 2x to Cal’.

Press the ‘ON’ button 2 times quickly and ‘Cal. Now Wait’ appears. The probe is now being calibrated to the calibrating solution. After a few seconds, the calibration is complete and the LCD returns to the main ‘EC and T’ display.

Repeat Steps 3-7 above, using the 80,000 µS/cm (Solinst P/N 101417) calibrating solution.

Your Solinst Model 107 TLC Meter is now calibrated and ready to use.

Notes:

The displayed reading should be within 2% of the calibration standard being used, if not, repeat calibration. (For 1413, ± 2% = 1384 to 1441 µS/cm, for 80,000 ± 2% = 78,400 to 81,600 µS/cm

 

Notes:

The de-ionized water, calibration solutions and the probe should all be at room temperature when conducting the calibration. Always ensure that no bubbles are trapped inside the probe shroud. Air bubbles will result in inaccurate calibrations. A repeat of the full calibration procedure.

 

Equipment Check

Upon receipt of your Solinst Model 107 TLC Meter, and always before heading out to the field, the following checks are recommended:

Turn the meter on. If the battery is low a ‘LOW BATT’ warning appears and the 9 volt alkaline battery should be replaced.

Ensure the probe tip and shroud are clean.

Calibrate the probe. (See calibration instructions)

Tape Guide Instructions

Fit the Tape Guide over the top of the well, small end in.

Insert the leg of the TLC Meter into the hole on the Tape Guide and rest the TLC Meter on the side of the well casing. (See Installation diagram.)

Take all measurements at the ‘V’ notch on the Tape Guide, and adjust readings according to the offset stamped on the Tape Guide.

When finished, store the Tape Guide by clipping it onto the support bracket on the back of the TLC Meter.