HD8706

HD8706 - pH Meter

Microprocessor Conductivity Meter Thermometer

HD8706 - pH MeterModel HD 8706 is a precise instrument for measuring the electric conductivity of liquids and their temperature.

In conductivity measurements, the compensation of the temperature coefficient a Tis automatic with a Tvariable between 0.00%/°C and 4%/°C. The instrument is supplied complete with a conductimetry cell with 4 graphite electrodes (to eliminate polarization effects) and a built-in temperature sensor.

The possible range of measurement of this cell is extremely wide, from a few microsiemens (distilled water) to a fraction of Siemens (base or strong acid).

HD8706

HD8706 complete kit

The instrument is provided with the following functions: “Autorange”, “Hold”, manual and/or automatic calibration with a sample solution (generally solutions of KCI with a known concentration) relative measurements, simultaneous storage (RCD) of minimum and maximum for both conductivity and temperature, Auto-Power-Off (it may be disabled), “Beep” to indicate that a key has been activated. The TP 870 range of probes is available for temperature measurements in a wider range than possible with the conductimetry cell.

Instrument Control Legenda

  • HD8706 legendaInput A DIN 8-pole connector. This input is suitable for the combined conductivity / temperature probe and for the TP 870 series of solely temperature probes.
  • HOLD symbol indicating HOLD status.
  • Display.
  • MIN symbol. The value indicated on the display is the MIN value stored by the instrument.
  • MAX symbol. The value indicated on the display is the MAX value stored by the instrument.
  • RCD symbol. Indicates that the instrument is storing the maximum and minimum value of the probe inserted in input A.
  • HOLD key. When this key is pressed the reading on the display is held while internally the instrument continues to update data.
  • REC key. when this key is pressed the instrument is set to store che MAX, MIN and present values read at the probe input.
  • REL key. For selecting REL relative operating mode. The relative measurement is taken with respect to the moment the REL key is pressed.
  • “aT” Key.When this key is pressed the modification of the temperature coefficient by means of the “triangle up-down” keys is enabled.
  • °C/°F Key. When this key is pressed temperature reading in °C or °F is selected.
  • “Triangle Up” key. This key is used during calibration to increase the value indicated on the display .
  • °C symbol, indicates that the reading being made is in °C.
  • °F symbol, indicates that the reading being made is in °F.
  • µS symbol, indicates that the reading being made is in µS (microSiemens).
  • mS symbol, indicates that the reading being made is in mS (milliSiemens).
  • REL symbol, indicates that a REL relative measurement is being taken.
  • B, flashing symbol, indicates that AUTO-POWER-OFF is disabled.
  • ON/OFF key ot switching the instrument on and off.
  • DATA-CALL key; when this key is pressed the display shows in sequence the MAX, MIN and present value of the signal detected by the probe inserted in input A.
  • X Keywhen this key is pressed the electric conductivity of the liquid being tested is measured .
  • CAL key when this key is pressed during the conductivity measurement, automatic and/or manual calibration is enabled.
  • Key V this key is used during calibration to decrease the value indicated on the display.
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Technical Specifications:

  • Conductivity: 0...199.9 µS; 1999 µS/1 µS; 19.99 mS/0.01 mS; 199.9 mS/0.1 mS
  • Temperature:
    • -25...+60°C (-19...+140°F) with built-in sensor in the conductimetry cell HD 8706S;
    • -50... + 199.9°C (-58...392°F) with optional TP 870 resolution 0.1 °C or 0.1°F up to + 199.9°F,1 °F beyond 200°P
  • Precision:
    • ±0.5% end of scale ±0.5% of reading for conductivity;
    • ±0.2°C (±0.4°F) ±0.15% of reading for temperature (including probe error)
  • Temperature Compensation: automatic with a T= 0.00. . .4.00%/°C
  • Display: LCD 12 mm
  • Symbols on the display: HOLD, RCD, REL, MAX, MIN, °C, °F, µS, mS
  • A/D Conversion Frequency: about 1 sec./conversion
  • Functions: Autorange, HOLD, storage of RCD, MAX/MIN, relative measure ments, automatic and/or manual calibration
  • Instrument Working Temperature: 0. . . + 50°C (32.. . + 122°F)
  • HD 8706S Probe Working Temperature: -25°C... + 60°C
  • Power Supply: 9W006P dry battery, duration about 100 hours with alkaline battery. Low battery charge indicated by a "Beep" at intervals of 30 seconds
  • Weight: about 350 gr
  • Dimensions: 135x73x38mm
  • Probe Connection: DIN 8-pole connector