User Manual
Model number
PH050
Description
Mini combination pH electrode with
sealed gelled reference filling
solution and detachable bulb guard
Dimensions
10 x 126 mm
Construction material
Polymer housing, glass bulb
Measuring range
0 to 14.0 pH units
Temp. range
0-80oC
Reference junction
Ceramic
Reference type
Ag/AgCl (silver silver chloride)
Isopotential point
~7.0 pH
Precision
0.02 pH units
Connector
BNC
Cable length
1 meter (39”)
Storage container
Cap
PH050
pH Electrode
Electrode Specifications
General Electrode Procedure
1. To avoid damage to the electrode when removing it from or inserting
it into the soaking bottle;
a. Unscrew the bottle cap.
b. Remove the electrode and cap from the bottle.
2. Rinse the electrode with deionized or distilled water.
3. Carefully shake electrode to ensure that any air bubbles in the bulb or
4. Blot electrode with tissue.
5. Connect electrode to pH meter and follow the pH meter
c. Slide the cap off the electrode.
d. Reverse this procedure when storing the electrode.
lower stem of the electrode are dislodged upwards.
manufacturer’s instruction for calibration.
Before Measurement
1. Generally, the sample should be aqueous and fall within the range 0 – 14
pH
2. Always use fresh buffers for calibration. Choose buffers that are no more than
3 pH units apart.
3. To obtain the maximum precision, always buffer as close as possible to
the expected measured value.
4. Between measurements, rinse electrodes with distilled water and then with the
next solution to be measured.
5. Stir all buffers and samples.
6. Avoid rubbing or wiping electrode bulb in order to reduce the chance of
error due to polarization.
pH Calibration and Measurement
Refer to the owner’s guide from the manufacturer of the pH meter being used for
detailed information regarding calibration and temperature compensation
procedures.
Two-Buffer Calibration (for high precision measurements)
1. Set up the pH meter according to the manufacturer’s instruction manual.
2. Ensure that all buffers are at the same temperature (+/- 2oC.) If samples are at
varying temperatures, temperature compensation is recommended. (See pH meter
instruction manual.)
3. Select two buffers that bracket the expected pH value. The first should be
near the electrode isopotential point (pH 7) and the second near the expected
pH of the sample. (e.g., pH 4 or 10.)
4. Rinse the electrode first with distilled water and then with pH 7 buffer. Place
the electrode in the pH 7 buffer.
5. Wait for a stable pH 7 reading. Set the pH meter to the pH value of the buffer
at its measured temperature.
6. Rinse the electrode first with distilled water and then with the second
buffer. Place the electrode in the second buffer.
7. Wait for a stable display. Set the pH meter to the pH value of the buffer at its
measured temperature.
8. Calibration is complete. Proceed to pH measurement
Single-Buffer Calibration (for lower precision measurements)
1. Set up the pH meter according to the manufacturer’s instruction manual.
2. Choose a buffer that has a value close to the expected pH of the sample.
3. Rinse the electrode first in distilled water and then in the buffer being used for
calibration. Place the electrode in the buffer.
4. Wait for a stable display. Set the pH meter to the pH value of the buffer at its
measured temperature.
5. Proceed to pH measurement
pH Measurement
1. Calibrate the electrode as described in previous section.
2. Rinse the electrode with distilled water and then with the sample solution.
3. Place the electrode in the sample.
4. Stir the sample.
5. When the reading is stable, record the pH value.
Electrode Storage and Maintenance
Electrode Storage.
1. Electrode PH050
Store with wetting cap kept damp with pH4 buffer or, alternatively, store in a
soaking solution.
Electrode Maintenance
1. Inspect the electrode for scratches, cracks, salt crystal build-up, or
membrane/junction deposits.
2. Rinse off any salt build-up with distilled water, and remove any
membrane/junction deposits as directed in cleaning procedures below.
3. Drain the reference chamber, flush it with fresh filling solution and refill the
chamber
Cleaning Procedures
Soak in mild detergent or dilute 0.1M HCl for 30 minutes
Electrode Reconditioning
If the electrode has been allowed to dry for any period of time it may require
reconditioning. Soak the electrode in a pH 4 buffer solution for at least 20
minutes. Depending on the dryness of the reference junction, this reconditioning
process may require up to a 24 hour soaking period in order to obtain accurate
pH readings.
Warranty Information
Triplett brand devices to be free of defects in parts and workmanship for (6) months
for the electrode.
Copyright © 2021 Triplett
www.triplett.com
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