LaMotte Tracer 1741, Manual

8

Preparation of Buffers 

1.  Fill a sample cup with 20 mL of distilled or deionized water.
2.  Add one buffer tablet:

pH 4.0

Code 3983A

pH 7.0 

Code 3984A

pH 10.0

Code 3985A

3.  Use the tablet crusher (0175) to crush the tablet. Stir until the tablet 

has disintegrated.

NOTE: Buffers should be prepared fresh daily.

pH Calibration 

The TRACER can be calibrated at 1, 2 or 3 points. For the most accurate 

results with a two point calibration, calibrate the TRACER with a pH 7 buffer 

first, then calibrate with either a pH 4 or pH 10 buffer whichever is closest 

to the pH value of the sample to be tested. When performing a three point 

calibration, calibrate with the pH 7 buffer first, followed with the pH 4 buffer 

and then the pH 10 buffer. For the most accurate results, always calibrate at 

the sample temperature.
1.  Place the electrode into a buffer solution (4, 7, or 10 pH) and press 

the CAL button. Typically, pH 7 is calibrated first, then 4 or 10, 

depending on the measurement range. If readings are going to be 

made over the entire range, calibrate with 4, 7 and 10 buffers.

2.  The TRACER will automatically recognize the solution and calibrate 

itself to that value. The circled number on the display will match the 

pH of the buffer.  

Note that if the buffer is more than 1 pH unit off from the 4, 7, or 10 

pH buffer, the TRACER will assume an error and abort the calibration. 

CAL

 and 

END

 will be displayed.

3.  During calibration, the pH reading will flash on the main display.
4.  When calibration is complete, the TRACER will automatically display 

END

 and return to the pH measurement mode.

5.  Rinse the electrode with distilled water.
6.  The appropriate circled indicator (4, 7, or 10) will appear on the 

display when a calibration has been completed. The calibration will be 

stored until a new calibration is performed.

7.  For a two- or three-point calibration, repeat Steps 1-5.
8.  The meter should be calibrated before each use to obtain the most 

accurate results.