pH CONDUCTIVITY BENCHTOP LABORATORY METER
HD 2256.2 pH Conductivity Resistivity, Salinity Benchtop Meter

HD2256.2 Meter Datalogger. pH or mV, conductivity or resistivity or TDS or salinity and temperature.
The HD2256.2 measures pH, mV, redox potential (ORP) with pH, redox electrodes or electrodes with separate reference.
Conductivity and resistivity in liquids, total dissolved solids (TDS) and salinity with combined 4-ring and 2-ring conductivity/temperature probes.
The conductivity probes can have a direct input or with SICRAM module. The inputs are separate.

Measured values:
pH - mV - χ - Ω - TDS - NaCl - °C - °F
Measured values storing
Quantity 2000 screens
Storage interval 1s … 999s
Calibration storage
Quantity Last 8 calibrations of each physical
quantity
RS232C serial interface standard
USB Interface optional

All models are fitted with input for the measurement of temperature with Pt100 or Pt1000 immersion, penetration or contact probes. The probes are equipped with an automatic detection module, with the factory calibration settings already being memorized inside.
The pH electrode calibration can be carried out on one or five points and the calibration sequence can be chosen from a list of 13 buffers.
The pH electrode calibration can be carried out on one or five points and the calibration sequence can be chosen from a list of 13 buffers Temperature compensation can be automatic or manual.
The instruments of the series HD22… are datalogger, they memorize up to
2,000 samples of data:

The data can be transferred from the instrument connected to a PC via the multistandard
RS232C serial port and USB 2.0. The storing parameters can be configured using the menu.
The RS232C serial port can be used to transfer the acquired measurements to a 24 column portable printer in real time (S’print-BT).
The instruments equipped with HD22BT (Bluetooth) option can transfer data
without any connection to a PC or printer fitted with Bluetooth input or through Bluetooth/RS232C converter.
The software DeltaLog11 allows instrument management and configuration, and data processing on PC.
Measurement of pH by instrument
Measuring range -9.999…+19.999pH
Resolution 0.01 to 0.001pH selectable from menu
Accuracy ±0.001pH ±1digit
Input impedance >10Exp12Ω
Calibration error @25°C |Offset| > 20mV
Slope > 63mV/pH o Slope < 50mV/pH
Sensitivity > 106.5% or Sensitivity < 85%
Calibration points Up to 5 points from a list of 13 automatically detected
buffers.
Automatically detected pH standard
solutions (@25°C)		 1.679pH - 2.000pH - 4.000pH - 4.008pH - 4.010pH
6.860pH - 6.865pH - 7.000pH - 7.413pH - 7.648pH
9.180pH - 9.210pH - 10.010pH
Measurement of mV by instrument
Measuring range -1999.9…+1999.9mV
Resolution 0.1mV
Accuracy ±0.1mV ±1digit
Drift after 1 year 0.5mV/year
Measurement of temperature by instrument
Pt100 Measuring range -50…+150°C
Pt1000 Measuring range -50…+150°C
Resolution 0.1°C
Accuracy ±0.1°C ±1digit
Drift after 1 year 0.1°C/year
Conductivity measurement by instrument
Measuring range (Kcell=0.01) / Res. 0.000…1.999μS/cm / 0.001μS/cm
Measuring range (Kcell=0.1) / Res. 0.00…19.99μS/cm / 0.01μS/cm
Measuring range (K cell=1) / Res. 0.0…199.9μS/cm / 0.1μS/cm
200…1999μS/cm / 1μS/cm
2.00…19.99mS/cm / 0.01mS/cm
20.0…199.9mS/cm / 0.1mS/cm
Measuring range (Kcell=10) / Ris. 200…1999mS/cm / 1mS/cm
Accuracy (conductivity) ±0.5% ±1digit
Measurement of resistivity by instrument
Measuring range (Kcell=0.01) / Res. Up to 1GΩ·cm / (*)
Measuring range (Kcell=0.1) / Res. Up to 100MΩ·cm / (*)
Measuring range (K cell=1) / Res. 5.0…199.9Ω·cm / 0.1Ω·cm
200…999Ω·cm / 1Ω·cm
1.00k…19.99kΩ·cm / 0.01kΩ·cm
20.0k…99.9kΩ·cm / 0.1kΩ·cm
100k…999kΩ·cm / 1kΩ·cm
1…10MΩ·cm / 1MΩ·cm
Measuring range (Kcell=10) / Res. 0.5…5.0Ω·cm / 0.1Ω·cm
Accuracy (resistivity) ±0.5% ±1digit
Measurement of total dissolved solids (with coefficient χ/TDS=0.5)
Measuring range (Kcell=0.01) / Res. 0.00…1.999mg/l / 0.005mg/l
Measuring range (Kcell=0.1) / Res. 0.00…19.99mg/l / 0.05mg/l
Measuring range (K cell=1) / Res. 0.0…199.9 mg/l / 0.5 mg/l
200…1999 mg/l / 1 mg/l
2.00…19.99 g/l / 0.01 g/l
20.0…199.9 g/l / 0.1 g/l
Measuring range (Kcell=10) / Res. 100…999 g/l / 1 g/l
Accuracy (total dissolved solids) ±0.5% ±1digit
Measurement of salinity by instrument
Measuring range / Resolution 0.000…1.999g/l / 1mg/l
2.00…19.99g/l / 10mg/l
20.0…199.9 g/l / 0.1 g/l
Accuracy (salinity) ±0.5% ±1digit
Automatic/manual temperature compensation
Reference temperature 0...100°C with αT = 0.00…4.00%/°C
0…50°C
Conversion factor χ/TDS 0.4…0.8
Cell constant K (cm-1) already
set on instrument		 0.01 - 0.1 - 0.5 - 0.7 - 1.0 - 10.0
Cell constants K(cm-1) that can be set by user 0.01…20.00
Standard solutions automatically detected (@25°C)
  147μS/cm
1413μS/cm
12880μS/cm
111800μS/cm

Ordering codes
HD 2256.2 Bench-top pH meter-Conductivity meter-Thermometer with back-lighted display, to measure pH, mV, ORP by pH, redox, separated reference electrodes, one input for a pH/temperature combined probe, un one input for a combined pH/temperature probe; it measures conductivity, liquid resistivity, total dissolved solids (TDS) and salinity by combined conductivity and temperature probes with 2 or 4 electrodes with direct input or with SICRAM module.
Datalogger for pH or mV, conductivity or resistivity or TDS and temperature. RS232 C serial output or USB 2.0 for data download to a PC or printer from memory or in real time. Input for Pt100 or Pt1000 temperature probes provided with SICRAM module. It is equipped with regulated power supply SWD10, instructions manual, software DELTALOG 11. Electrodes, conductivity probes, buffer solutions, TP47… series temperature probes with SICRAM module and cables for PC connection have to be ordered separately.
 

Please email sales@hotektech.com or call 253-927-6186 if you are interested in a purchase, or
  need additional information.

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