Phone: 253-927-6186
 Email: sales@hotektech.com

HD 2256.2 pH Benchtop Meter Data Logger.

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.

HD 2256.2 pH Benchtop Meter Data Logger.

Model  Description 
HD 2256.2  HD 2256.2 pH Benchtop Meter Data Logger.

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 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 (Sprint-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.

HD 2256.2 pH meter specifications
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 1GΩcm / (*)
Measuring range (Kcell=0.1) / Res. Up to 100MΩcm / (*)
Measuring range (K cell=1) / Res. 5.0 - 199.9Ωcm / 0.1Ωcm
200 - 999Ωcm / 1Ωcm
1.00kΩ - 19.99kΩcm / 0.01kΩcm
20.0kΩ - 99.9kΩcm / 0.1kΩcm
100kΩ - 999kΩcm / 1kΩcm
1 - 10MΩcm / 1MΩcm
Measuring range (Kcell=10) / Res. 0.5 - 5.0Ωcm / 0.1Ωcm
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.

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Company

  • Hotek Technologies, Inc
  • tel: 253-927-6186
  • sales@hotektech.com
  • services@hotektech.com
  • info@hotektech.com