1 3
II. Temperature Unit Selection
The PT1 allows you to select the type of units used for temperature
measurements. The following table lists preference options with their
corresponding units.
Mode UnitPreference
C Degrees Celsius
F Degrees Fahrenheit
ESC This is the escape function. Selecting escape exits temperature
unit selection without saving changes and turns the PT1 off.
To set the preference:
1. Press and release the push button. The LCD will briey 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 “ºCºF TEMP” displays.
3. While the display scrolls through “PUSHnHLD” and “ºCºF TEMP”, push
and hold the push button. The display will scroll through “C”, “F” and
“ESC”. Release when the desired unit option displays.
4. “SAVEd” displays indicating the unit preference is saved in memory.
Allow the pen to time out to turn power off.
III. Normal Operation
Before you take a reading, make sure the pen is clean, calibrated (see
IV. Calibration) and in the appropriate measurement mode. The sample
solution must also be within the specied measurement range. Keep
all foreign material away from the sample to avoid contamination.
NOTE: If you cannot dip the pen in the sample solution, pour the
sample into a clean container. If you don’t have a sample container
and need to test a vertical stream of solution, use the scoop.
The following table explains what the LED Indicator Light signals mean
and gives the duration of each signal.
LED Indicator Light Signal Meaning Duration
Rapid Flashing Dip pen in solution 6 sec
Slow Flashing Measurement in process 10-20 sec
Solid Light Note measurement value 6 sec
CAUTION: To measure solution at the extremes of the specied
temperature range, allow the pen to equilibrate by submerging the cell in
the sample solution for 1 minute prior to taking a measurement.
1. Rinse the pen 3 times by submerging the cell in fresh sample solution
and swirling it around.
2. Remove pen from solution, then press and release the push button.
Firmware version will be displayed, then current measurement mode.
3. Grasp the pen by its case with your ngers positioned between the
display and the pen cap to avoid sample contamination.
4. While the LED ashes rapidly, dip the pen in fresh sample 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
retake the reading.
5. While the LED ashes slowly, swirl the pen around to remove
bubbles, keeping the cell submerged. Keep the pen at least 1 inch
(2½ cm) away from sides/bottom of container, if applicable.
6. When the LED turns on solid, remove the pen from solution. The display
will alternate between the measurement and temperature readings.
Note the readings for your records.
(6 pages)
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