Myron L PT4 - Manual (Page 5)

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To perform Solution Check:
1. Push and release the push button to turn the PT4 on.
2. Push and hold the push button. The display will alternate between “CAL”, “FAC
CAL”, “ºCºF TEMP”, “ModE SEL”, “PAr SEL”, “SOL ck”, and “ESC”.
3. Release the button when “SOL ck” displays.
4. The display will alternate between “PUSHnHLD” and “SOL ck”.
5. Push and hold the button, The display will alternate between “PH” and “ORP”.
6. Release the button when desired mode (pH or ORP) is displayed.
7. While the LED flashes rapidly, dip the PT4 in FRESH buffer/calibration solution so
that the sensor is completely submerged and swirl the PT4 around to remove any
air bubbles.
8. Verify value displayed is correct.
NOTE: To verify ORP calibration while in solution check mode, you must manually
correct for temperature variations from 25ºC. See instructions that come with the ORP
Standard Solutions for temperature chart.
VI. Factory Calibration
When pH Buffers are not available, the PT4 can be returned to factory default calibration
using the FAC CAL function. This will erase any stored wet calibration.
NOTE: Default factory calibration resets the electronics only and does NOT take the
condition of the sensor into consideration.
To return your PT4 to factory calibration:
1. Push and release the push button.
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 “FAC CAL” displays. The display will alternate between
“PUSHnHLD” and “FAC CAL”.
4. Push and hold the push button. “SAVEd FAC” displays indicating the pen has been
reset to its factory calibration.
MAINTENANCE
I. Routine Maintenance
1. ALWAYS rinse the FC E sensor with clean water after each use.
2. ALWAYS replace the soaker cap half filled with Sensor Storage Solution to prevent the
sensor from drying out after each use.
3. Do not drop, throw, or otherwise strike the PT4. This voids the warranty.
4. Do not store the PT4 in a location where the ambient temperatures exceed its specified
Operating/Storage Temperature limits.
II. Battery Replacement
The PT4 display has a battery
indicator that depicts the life
remaining in the battery. When the
indicator icon is at 3 bars, the battery
is full. When the indicator icon falls to
1 bar, replace the battery with an N
type battery.
In a clean/dry environment, 1.
unscrew the pen cap in a counter-clockwise motion.
Slide the cap and battery housing out of the 2. PT4 .
Remove the depleted battery out of its housing. 3.
Insert a new battery into the battery housing oriented with the negative end 4.
touching the spring.
Align the groove along the battery housing with the guide bump inside the 5. PT4
case and slide the battery housing back in.
Screw the 6. PT4 cap back on in a clockwise direction. Do not over tighten.
III. Sensor Cleaning
(additional sensor cleaning methods at www.myronl.com)
Cleaning the sensor: The Myron L Company recommends cleaning your sensor every
two weeks, however this depends on application and frequency of use. Indications of a
dirty sensor are slower and/or erroneous readings.
There are three critical components in your PT4 sensor; a very sensitive glass pH
sensor bulb, a platinum ORP electrode, and a temperature sensor encapsulated in a
small glass noid. Use extreme caution when cleaning your PT4 sensor.
To clean your sensor, select one of the following methods:
Basic Cleaning: Using a solution made of dish soap mixed with water and a cotton •
swab, gently clean the inside of the sensor body and platinum electrode, rinse
thoroughly with clean water, then recondition the sensor.
Cleaning the pH Sensor Bulb: If the sensor becomes dirty, clean the sensor surface •
with an isopropyl soaked cotton swab. Then rinse thoroughly with clean water.
Deep cleaning the platinum ORP electrode: Using the ORP electrode cleaning •
paper and water, gently clean the platinum electrode, rinse thoroughly then
recondition the sensor.
To recondition the sensor: Rinse the sensor thoroughly with clean water, then allow
it to soak in Storage Solution for a minimum of 1 hour (for best results allow the sensor
to soak in Storage Solution overnight).
Battery Housing
Battery
+
_
Align groove in battery housing with guide
bump in pen case.
Pen Case
... Solution Check continued from page 3