1
OPERATING INSTRUCTIONS
NOTE: Selecting “ESC” from any menu immediately powers the unit off without
saving changes.
I. Temperature Unit Selection
The PT2 allows you to select the type of units used for displaying temperature:
˚C (Degrees Celsius) or ˚F (Degrees Fahrenheit).
To set the preference:
1. Push and release the push button to turn the unit on.
2. Push and hold the button. The display will alternate between “CAL”,
“FAC CAL”, “ºCºF TEMP”, “ModE SEL” and “ESC”.
3. Release the button while “ºCºF TEMP” is displayed. The display will alternate
between “PUSHnHLD” and “ºCºF TEMP”.
4. Push and hold the button. The display will alternate between “˚C”, “˚F” and
“ESC”. Release the button when desired unit preference displays.
5. “SAVEd ºC” or “SAVEd ºF” will display; then the unit will power off.
II. pH Mode Selection
The PT2 allows you to select the pH measurement mode you prefer:
Hold
(once stabilized, the readings are captured then displayed) or
LIVE
(real-time readings are displayed continuously during measurement)
To set the pH measurement mode preference:
1. Push and release the push button to turn the unit on.
2. Push and hold the button. The display will alternate between “CAL”, “FAC
CAL”, “ºCºF TEMP”, “ModE SEL” and “ESC”.
3. Release the button when “ModE SEL” is displayed. The display will alternate
between “PUSHnHLD” and “ModE SEL”.
4. Push and hold the push button. The display will alternate between “Hold”,
“LIVE” and “ESC”.
5. Release the button when desired mode displays.
6. “SAVEd” will display, then the unit will power off.
III. pH Measurement
The following table explains what the LED Indicator Light signals indicate and gives
the duration of each signal:
LED Signal
Action
Duration
Rapid Flashing Dip pen in solution.
6 sec
Slow Flashing Measurement in process.
In LIVE mode, the readings are displayed.
In LIVE mode, note measurement values.
10-30 sec in Hold mode
60 sec in LIVE mode
Solid Light
(Hold mode
only)
Measurement is complete.
In Hold mode, captured readings are displayed.
In Hold mode, note measurement values.
6 sec
CAUTION:
To measure solution at the extremes of the specified temperature or pH
range, allow the pen to equilibrate by submerging the sensor in the sample solution
for 1 minute prior to taking a measurement.
NOTE: If you cannot dip the pen in the sample solution, pour the sample into a
clean container. If you don’t have a container or need to test a vertical stream of
solution, use the scoop to hold sample solution.
1. Rinse the pen. If measuring from a container, submerge the pen and swirl it
around in FRESH sample solution 3 times. Alternatively, 30 seconds under a
stream or of swirling in a body of water is sufficient to prepare the sensor for
measurement.
2. Remove pen from solution. (Fill the container one more time with FRESH
sample solution, if applicable.) Then push and release the push button.
3. Grasp the pen by its case with your fingers positioned between the display and
the battery cap to avoid sample contamination.
4. While the LED flashes rapidly, dip the pen in FRESH sample solution so that the
sensor is completely submerged. If you do not submerge the sensor in solution
before the flashing slows, allow the pen to power off and retake the reading.
5. While the LED flashes slowly, swirl the pen around to remove bubbles, keeping
the sensor submerged.
a. In Hold mode when the LED turns on solid, remove the pen from solution.
2
