Owner's manual
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OPERATING INSTRUCTIONS
NOTE: Selecting “ESC” from any menu immediately powers the PT4 off without saving
changes.
I. Temperature Unit Selection
The PT4 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 PT4 on.
2. Push and hold the button. The display will alternate between “CAL”, “FAC CAL”, “ºCºF
TEMP”, “ModE SEL”, “PAr SEL”, “SOL ck”, 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. FC
E
Mode Selection
The PT4 allows you to select the FC
E
measurement mode you prefer:
Hold Mode (default) — will display real-time readings until stable or 2 minutes, which ever
comes rst, then display nal readings.
LIVE Mode — real-time readings are displayed continuously for up to 5 minutes, a push and
release of the button will turn your PT4 off immediately.
To set the FC
E
measurement mode preference:
1. Push and release the push button to turn the PT4 on.
2. Push and hold the button. The display will alternate between “CAL”, “FAC CAL”, “ºCºF
TEMP”, “ModE SEL”, “PAr SEL”, “SOL ck”, 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 PT4 will power off.
III. FC
E
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 and swirl. 6 sec
Slow Flashing Measurement in process; continue to swirl.
In Hold mode real-time readings are displayed
until the LED is on solid.
In LIvE mode real-time readings are displayed
until the PT4 turns o..
20 -120 sec in Hold mode
5 min in LIvE mode
Solid Light
(Hold mode only)
Measurement is complete. Values are displayed
until the PT4 turns o.
6 sec
CAUTION: To measure solution at the extremes of the specied temperature or FC
E
range, allow the PT4 to equilibrate by submerging the sensor in the sample solution for 1
minute prior to taking a measurement.
NOTE: If you cannot dip the PT4 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 3 times in a sample of the solution.
2. Push and release the push button.
3. While the LED ashes rapidly, dip the PT4 in FRESH sample solution so that the
sensor is completely submerged. If you do not submerge the sensor in solution
before the ashing slows, allow the PT4 to power off and retake the reading.
4. While the LED ashes slowly, swirl the PT4 around to remove any air bubbles,
keeping the sensor submerged.
a. In Hold mode when the LED turns on solid, remove the PT4 from solution. The
display will alternate between the nal FC
E
and temperature readings. Note the
readings for your records.
b. In LIVE mode allow the PT4 to remain in solution while the LED ashes slowly.
The display will alternate between live FC
E
and temperature readings. Note the
readings for your records. LIVE measurement will time out after 5 minutes OR
push and release the push button to turn the PT4 off at any time during LIVE
measurement.
IV. Calibration
The Myron L Company recommends calibrating twice a month, depending on usage.
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