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DESIGNED & OPTIMISED EXCLUSIVELY FOR
MODERN F-T INFRARED &
NIR SPECTROMETERS


D5 HEATED CELL POWER SUPPLY UNIT

OPERATING INSTRUCTIONS

 

  1. Check the ‘Voltage Select’ switch at the back of the unit. It must be set to the correct mains power supply voltage for the country in which the unit is to be used.
  2. Switch the unit on.
  3. The temperature control unit will flash “INPUT FAIL”.
  4. Plug in the Hot Cell
    T (see below for temperature controller input selection)
  • Set the required temperature by holding down the * button whilst using DOWN or UP keys, as appropriate.

‘HOT POWER’ SWITCH

  • H series - Ambient to 100°C use Low; 100°C to 180°C use Medium. High can be used to reach the set temperature quickly but switch back to the appropriate setting as the set temperature is approached.
  • HT series - Ambient to 100°C use Low; 100°C to 200°C use Medium; 200°C to 300°C use High. High can also be used for quickly achieving lower temperature settings, as mentioned for the H series.

For typical applications the H series cell is used. The power supply unit is delivered configured for use with such a cell.
For higher temperature applications the HT series cell is used.

A platinum resistance device is built in to each unit and is therefore integrated into the supply socket.
The temperature controller must be configured properly for the cell type in use to ensure the operating temperature range of the cell is not exceeded.
To instruct the CAL unit proceed as follows:-

  1. Press and hold DOWN and UP keys until ‘TUNE’ is displayed. Release the buttons.
  2. Press DOWN key once briefly to ‘LEVL’.
  3. Hold * and press UP key once briefly to LEVL, ‘2’. Release *.
  4. Press DOWN or UP keys repeatedly to ‘HISC’.
    (HT): - Hold * and press DOWN or UP keys repeatedly, as appropriate until 300 (hold DOWN or UP keys down and wait. The rate of change in the value increases the longer you hold). Release *.
    (H): - Hold * and press DOWN or UP keys repeatedly, as appropriate until 200 (hold DOWN or UP keys down and wait. The rate of change in the value increases the longer you hold). Release *.
  5. Press UP key once briefly to ‘LOSC’.
  6. Hold * and press DOWN or UP keys repeatedly, as appropriate until 0. Release *.
  7. Press and hold DOWN and UP keys until ‘LOSC’ disappears and a figure is displayed. Release the buttons.
NOTE: H series cells must not be operated at temperatures in excess of 200C.   HT series cells are safe to temperatures NOT EXCEEDING 300C.

Refer to the Autotune section to complete the set-up of the system for optimal performance.

COMMUNICATIONS

This unit can communicate with and be controlled by a PC. For full comms set-up instructions refer to ‘Communications set-up’.

AUTOTUNE

A facility that uses the CAL controller’s ‘brain’ to set the unit up for optimal control of the accessory connected to a set temperature.

The CAL unit is supplied ready for use with standard Hot cells and will control them adequately. It has however been found that the default settings are sometimes not ideal. It is recommended that Autotune should be used and that it would be beneficial to use it for each and every change of setpoint with all cells.

For successful operation of the system using Autotune carry out the following procedure:-

NOTE: When Autotune is in use the Hot power switch must not be disturbed at all. We recommend that the Hot power switch be set to med before continuing further.
  1. Set the required temperature by holding down the * button whilst using UP or DOWN, as appropriate.
  2. Press and hold UP and DOWN until ‘tunE’ is displayed. Release the buttons.
  3. Press DOWN repeatedly until ‘CyC.t’.
  4. Hold * and hold UP untilA - -‘. Release the buttons.
  5. Press UP repeatedly until ‘tunE’.
  6. Hold * and press DOWN once briefly to ‘on’. Release *.
  7. Press and hold UP and DOWN until ‘tunE’ disappears and a figure is displayed. Release the buttons.
  8. Plug the required cell in.
  9. Leave the unit to calculate all necessary settings for optimal control of the cell, to your setpoint.

The setpoint should be reached within approximately 5 minutes with insignificant overshoot and will hold the value very accurately.

In the event of a fuse blowing a list of replacements is as follows: -

Mains Inlet = 1A anti-surge (115V), 500mA anti-surge (230V);
HOT = 4A semi-delay.
All fuses are 5x20mm types.

SPECIFICATIONS

The D5 Comm has the versatility of either stand-alone operation or control by a p.c. via a serial link. In the latter mode full control of the unit is then passed over to the Calcomms™ p.c. interface. This feature allows the user to plot temperature against time.

NOTE: The use of the comms facility is limited to p.c's with Windows operating systems only.

INPUTS:

230/115V, 50/60 Hz, switchable, by filtered IEC inlet, fused.

Platinum Resistanve Thermometer.

OUTPUT:

  1. 24V d.c. @ 3A with High, Medium and Low energy settings (Full, Half and Quarter power respectively).

The output is fully smoothed and is fused. All negative lines are grounded.

The unit is built in to a high quality metal case, which is itself grounded.

CONTACT

For further assistance please contact:

Ventacon Ltd,
Gable Cottage,
Winchester,
Hants SO21 2PR, UK
Tel: +44 (0)1962 776314
Fax: +44 (0)1962 776390


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