LTH Electronics

LTH Electronics

Model HCT63 - Conductivity Transmitter

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The HCT63 is a microprocessor controlled conductivity measurement instrument with the facility to display in ìS/cm, mS/cm, MÙ.cm or ppm. The unit utilises a multifunction LCD to display readings and provide feedback to the operator. It is available with different options to provide fully configurable control and feedback with up to two control relays and two 0/4-20mA current output sources.

  • Off-line facility (for calibration and commissioning) : The relays are de-energised and the current output is held at the last on-line value.
  • Ambient operating temperature : -20 °C to +50 °C ( -4 °F to 122 °F) for full specification.
  • Ambient temperature variation : 0.01% of range / °C (typical)
  • Display : Custom back-lit LCD module. 4 character (& sign) 7 segment (20 mm high) for measure value; 2x3 dot matrix for units indication; and 1x16 dot matrix for information and programming.
  • Digital Inputs : Three digital inputs (contact closure) for remote selection of measurement range.
  • Current output (1 standard, 2 optional) : Each selectable 0 - 20 mA or 4 - 20 mA into 750 ohms max., fully isolated to 2kV. Expandable up to 5% of any operating range and offset anywhere in that range.
  • Operator adjustment (Current output) : ± 1 mA zero and ± 1 mA span for remote monitor calibration.
  • Setpoints and control relays (2 optional) : Fully configurable setpoints (?S, ppm, mS, M?, °C) with volt free contacts for each relay. Rated at 5A 30V DC / 5A 250V AC (noninductive). Red LED's indicate relay energised.
  • Operating modes (Control relays 1 and 2) : On/Off, Time proportioning, Pulse proportioning and Band modes selectable for each relay. Adjustable delay timer up to 10:00 mm:ss in the On/Off mode. Hysteresis 0 to 9.9% in the On/Off mode. Adjustable dose alarm timer up to 15:00 mm:ss in all modes. Adjustable cycle time and proportional band in the proportional modes.
  • Alarm mode : USP26 settings with optional pre-trigger. Either relay can be set to energise on any of the following instrument conditions: Sensor alarm, Dose alarm, Calibration, Off line, Any error.
  • Switches : Four tactile-feedback push buttons.
  • EMC : Immunity : BS EN 50082-2:1995.
  • EMC :Emissions : BS EN 50081-1:1992.
  • LVD : Safety standard : BS EN 61010-1:1993.
  • Power supply : 15 - 30V AC or DC @ 200 mA.
  • Head Mount Housing : Conductive ABS blue plastic, rated IP66.
  • Weight : 600 grams (instrument only).
  • Dimensions : 110 x 116 x 145 mm (H, W, D) excluding connectors.

  • Conductivity sensor : Two LTH conductivity cells are available for head-mounting the instrument: CMC64/10/PT43 This has a cell constant of 1.0 and is typically used in waste water measurement. CMC68/001/PT43 This has a cell constant of 0.01 and is typically used for ultra-pure water measurement.
  • Ranges of measurement : 0 - 0.999 ?S/cm to 0 - 99.99 mS/cm (K= 0.01 to 1.0). 0 - 99.99 K?.cm to 0 - 99.99 M?.cm (K= 0.01 to 1.0). 0 - 0.999 ppm to 0 - 99.99 ppt. (parts per thousand). See the following range / cell constant table.
  • Conductivity accuracy : 0.5 % of range
  • Linearity : 0.1 % of range
  • Repeatability : 0.1 % of range
  • Operator adjustment (conductivity) : ± 10 % slope (gain) adjustment for solution calibration.
  • Temperature sensor : Pt 1000 RTD.
  • Range of temperature measurement : -50 °C to +300 °C ( -58 °F to 572 °F) for full specification.
  • Temperature accuracy : 0.2 °C
  • Operator adjustment (temperature) : ± 50 °C or ± 122 °F
  • Range of temperature compensation : -10 °C to +130 °C ( 14 °F to 266 °F) for full specification.
  • Temperature compensation type : Fixed UPW curve plus variable slope 0 - 3.9 % / °C over -10 to +110 °C. Selectable In or Out.
  • Temperature compensation base : Selectable at 20 or 25 °C.
  • Cell constant adjustment : Fully adjustable from 0.01 - 19.99.
  • Cell Constant Calibration : Only available on K = 0.1 and 0.01 ±50%
  • Remote range changing : Using a 3 pole 8 way remote mounted switch. Connection by up to 100 metres of cable.

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