MVP ICON 78088-00, Instructions, Page: 1 / 3

pH / Temperature Probe
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Part No. 78088-00
55226.R004.042016
1 of 3
GENERAL DESCRIPTION
The MVP ICON® pH / Temperature Probe is semi ‐ conductor
designed for general purpose pH measurement of liquids or
semi ‐ solids ranging from 0 – 14 pH. Temperature
measurements, ranging from 0 – 80 °C, may be taken
simultaneously. The probe features a silver / silver chloride /
potassium chloride reference system and a thermistor with
automatic temperature compensation. Solid ‐ state
componentry built into the MVP ICON instrument controls
this sensing element. The MVP ICON pH / Temperature
Probe is designed for use with the MVP ICON instrument
only. Any other combination might cause loss of
performance or irreversible damage to both probe and
instrument.
Part No: 78088 ‐ 00
KIT COMPONENTS
Each kit contains one MVP ICON pH / Temperature Probe
and a soft bristle brush for cleaning the sensor on the tip.
TEST PROCEDURE
A. Using the MVP ICON pH / Temperature Probe
Note: The MVP ICON pH / Temperature Probe must be
calibrated for pH prior to first use. See B. Calibration for
pH for details.
(a) Remove and save the protection cap or tube from the
probe tip prior to use.
Note: Reference gel may be observed as a viscous
material on the tip of the probe. Some gel seepage from
a new probe is normal and will not affect the longevity
or performance of the probe.
(b) Prior to each day of use, scrub the probe tip with a soft
bristled brush (included) and deionized water to remove
possible residues. Use a mild detergent if required.
(c) If the probe has not been used for 2 or more days, clean
as above, soak tip in saturated KCI (potassium chloride)
solution (see OPERATING TIPS ) for 10 ‐ 15 min, then
soak in pH 7.00 or pH 4.00 buffer for at least 10 min.
(d) Ensure the probe is securely connected to the MVP ICON
instrument by inserting the probe’s connector with the
arrows facing toward the back of the instrument and the
white circular sticker facing the front. Insert probe into
the sample. Follow instructions on the MVP ICON to
complete reading. Both pH and temperature readings
will be displayed on the instrument screen.
Note: To disconnect the probe, squeeze both sides of
the connector while unplugging from the MVP ICON.
(e) When using the MVP ICON pH / Temperature probe with
semi ‐ solids, insert probe so that both sensor and porous
white plug on opposite side of probe tip are contacting
or immersed in the sample. Rotate left to right several
times and tilt to ensure constant contact with the
sample.
(f) To ensure correct measurement values, samples or
buffers should be mixed well. This may be done using a
magnetic stirrer or by gently stirring the probe in the
sample for at least 5 sec. You may continue to stir while
the reading is taking place.
(g) The probe should be rinsed thoroughly with deionized
water and blotted dry between samples.
B. Calibration for pH
The MPV ICON pH / Temperature Probe features a 3 ‐ point
calibration using pH 7.00, then pH 10.00, and finally pH 4.00
buffer solutions.
Note: Use a borate ‐ based pH 10.00 buffer (not a carbonate
based buffer) to ensure a robust calibration slope for pH
values above 7.00.
Note: In order to perform accurate pH measurements, the
MVP ICON pH / Temperature Probe must be calibrated daily
prior to use, or when using a different MVP ICON pH /
Temperature Probe.
(a) Rinse the MVP ICON pH / Temperature Probe with
deionized water. Soak probe in fresh pH 7.00 buffer for
at least 2 min prior to calibration.
(b) From the MVP ICON, enter pH mode, press Device , then
press Calibration .
(c) Insert the probe into pH 7.00 buffer to begin. Repeat
with fresh pH 10.00 and pH 4.00 buffers when prompted
on the MVP ICON screen. Ensure buffers are well mixed.
(d) Rinse probe with deionized water and blot dry between
buffers.
C. Calibration for Temperature
The MVP ICON pH / Temperature Probe uses a factory ‐
calibrated thermistor. It only needs to be re ‐ calibrated if it
has been used to measure temperatures 20 °C above or
below room temperature. The probe features a single ‐ point
calibration that can be done at any known temperature
within the operating range.
Note: The calibration is most accurate when using a known
temperature close to the sample temperature range.
(a) From MVP ICON, enter TEMPERATURE mode, press
Device menu, then press Calibration .