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3
INTRODUCTION
The
HD2106.1
and
HD2106.2
are portable instruments with a large LCD display. They measure
conductivity, liquid resistivity, total dissolved solids (TDS) and salinity using combined 4-ring and
2-ring conductivity/temperature probes. Temperature only is measured by Pt100 or Pt1000 immer-
sion, penetration or contact probes.
The probe calibration can be performed automatically in one or more of the 147
μ
S/cm, 1413
μ
S/cm,
12880
μ
S/cm or 111,800
μ
S/cm conductivity calibration solutions.
The temperature probes are automatically detected by the instrument upon turning on.
The HD2106.2 is a
datalogger
. It memorizes up to 36,000 conductivity and temperature samples
that can be transferred from the instrument connected to a PC via the RS232C serial port or USB
2.0 port. The storing interval, printing, and baud rate can be configured using the menu.
The HD2106.1 and HD2106.2 models are fitted with an RS232C serial port and can transfer the ac-
quired measurements to a PC or to a portable printer in real time.
Display, printing and logging (model HD2106.2) always include temperature in °C or °F, and one
of the parameters of conductivity measure (
χ
or
Ω
or TDS or NaCl).
The
Max
,
Min
and
Avg
function calculates the maximum, minimum or average values.
Other functions include the relative measurement REL, the Auto-HOLD function, and the automatic
turning off which can also be disabled.
The instruments have IP66 protection degree.
This manual describes the HD2106.1 and HD2106.2 models: if not otherwise specified, the de-
scription is intended to be applicable to both models.