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GENERAL DESCRIPTION AND INTENDED USE
GENERAL DESCRIPTION AND INTENDED USE
The HI991300 and HI991301 are lightweight, portable
pH, conductivity (or total dissolved solids) and temperature
meters for portable applications requiring both pH
and conductivity (or TDS) measurement. To increase
conductivity accuracy, two models are available, with
different conductivity ranges, for applications from purified
to brackish waters.
The HI991300 and HI991301 feature a two button
operation system and are simple to use. All operations and
settings are made through these two buttons. They have a
waterproof and compact casing rated for IP67 conditions
and a large three‑line display. The meters have automatic
pH calibration at one or two points and a single conductivity
calibration. Other user selectable features include different
TDS factors from 0.45 to 1.00, and a range of temperature
coefficients (β) from 0.0 to 2.4% for better conductivity or
TDS solution temperature compensation.
The supplied HI12883 multi‑parameter probe, incorporates
a dome shaped pH bulb rated from 0‑13 pH, a single
junction Ag/AgCl reference electrode with gelled electrolyte
and a retractable cloth wick junction, a graphite EC/TDS
cell, and a temperature sensor in one convenient, rugged
polypropylene body. In addition, to ensure against
interference from transient electrical noise to pH, a solid‑
state preamplifier is integrated into the probe. The probe is
rated from 0 to 50°C.
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