5
GENERAL DESCRIPTION
Other features include:
• Log on demand up to 200 samples (100 pH and 100 mV).
• Auto Hold feature, to freeze first stable reading on the LCD.
• GLP feature, to view last calibration data for pH.
• PC interface.
The
HI98164
is a portable pH and temperature meter designed specifically for pH measurement in
yogurt. Monitoring pH is crucial in producing consistent, quality yogurt. Yogurt is made by fermenta‑
tion of milk with live bacterial cultures. Once milk is pasteurized, live culture is added and the mixture
of milk and bacteria is incubated. Yogurt producers cease incubation once a specific pH level is
reached. By verifying that fermentation continues to a predetermined pH endpoint, yogurt producers
can ensure their products remain consistent in terms of flavor, aroma and texture.
The
HI98164
meter is provided with a series of new diagnostic features which add an entirely new
dimension to the measurement of pH, by allowing the user to dramatically improve the reliability of
the measurement:
• Seven standard buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45) for calibration.
• pH calibration up to five calibration points (see instrument specifications).
• Custom calibration with up to five custom buffers.
• Messages on the graphic LCD for an easy and accurate calibration.
• Cal Check™ Diagnostic features to alert the user when the electrode needs cleaning.
• Optional user enabled “Outside Calibration Range” warning.
• Monitoring of the electrode aging.
• User selectable “Calibration Time Out” to remind when a new calibration is necessary.
This meter is supplied with a pH electrode specifically designed for use with yogurt products. The
FC2133
with a built‑in temperature sensor features a rugged easy to clean glass body with a conic
glass tip ideal for measurements in semi‑solids such as yogurt. The open junction design consists of
a solid gel interface (viscolene) between the sample and internal Ag/AgCl reference. This interface
not only prevents silver from entering the sample, but also makes it impermeable to clogging after
measurements in semi‑solid or viscuous samples.
FC2133
electrode is designed to prevent the typical problems of clogging in viscuous liquids, ensuring
a fast response and stable reading.
