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


UNIVERSAL POWER
SUPPLY UNIT - D2 MK2 COMM

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 thermocouple you are going to use. # (see below only for Hot cell use)

HOT CELL

  1. Set the required temperature by holding down the * button whilst using UP or DOWN keys, as appropriate.
  2. Plug the cell into the ‘HOT’ socket.
  3. Set the ‘Output Select’ switch to point to the ‘HOT’ output.

‘HOT POWER’ SWITCH

  • H series - Ambient to 100C use Low; 100C to 180C 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 100C use Low; 100C to 200C use Medium; 200C to 300C use High. High can also be used for lower temperature settings as mentioned for the H series.

THERMOCOUPLES

# In using a Hot Cell consideration must be given to the type of thermocouple required, e.g.  Earlier H series cells use type ‘T’ and HT series cells use type ‘K’.

N.B. It is very important that only one thermocouple should be plugged in at once.

More recently cells are equiped with RTD platinum resistance probes and no T/C is used. Contact to the probe is made through the DIN Plug and HOT socket.

SET-UP

Plug a suitable thermocouple for the application in to the correct socket (if fitted). The temperature controller must be configured properly for the cell type in use or the indicated and hence set temperature values will be meaningless. To instruct the CAL unit proceed as follows:-

  1. Press and hold UP and DOWN keys until ‘tunE’ is displayed. Release the buttons.
  2. Press UP key once briefly to ‘LEUL’.
  3. Hold * and press DOWN key once briefly to LEUL, ‘2’. Release *.
  4. Press DOWN key repeatedly to ‘inPt’.
  5. Hold * and press UP or DOWN keys repeatedly to ‘tC t’ or ‘tC K’, as appropriate. Release *.
  6. Press UP or DOWN keys repeatedly to ‘hi.SC’.
  7. Type K (HT): - Hold * and press UP or DOWN keys repeatedly, as appropriate until 300 (hold UP or DOWN keys and wait. The rate of change in the value increases the longer you hold). Release *.
  8. Press DOWN key once briefly to ‘Lo.SC’.
  9. Hold * and press UP or DOWN keys repeatedly, as appropriate until 0. Release *.
  10. Type T (H): - Hold * and press UP or DOWN keys repeatedly, as appropriate until 200 (hold UP or DOWN keys and wait. The rate of change in the value increases the longer you hold). Release *.
  11. Press DOWN key once briefly to ‘Lo.SC’.
  12. Hold * and press UP or DOWN keys repeatedly, as appropriate until –150. Release *.
  13. Press and hold UP and DOWN keys until ‘Lo.SC’ 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.

COLD CELL

  1. Set the required temperature by holding down the * button whilst using UP or DOWN keys, as appropriate.
  2. Plug the cell in to the ‘COLD’ socket.
  3. Set the ‘Output Select’ switch to point to the ‘COLD’ output.

The ‘Cold Power’ switch is set to ‘High’ only when there is a large temperature rise required within the cell, i.e. a temperature considerably higher than that of the refrigerant. In such a case, as the temperature of the cell approaches the set temperature the ‘Cold Power’ switch should be set back to ‘Low’ and left.

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

CAUTION: DO NOT PLUG THE COLD CELL INTO THE HOT OUTPUT SOCKET.

ROTATOR

  1. Plug the cell in to the ‘0-12 V’ socket.
  2. Set the preferred speed settings as appropriate using the small black knobs.

THUMPER (Kinetic Cells)

  1. Plug the cell in to the ‘THUMPER’ socket.
  2. Switch Thumper ‘On’.
  3. Refer also to the ‘Hot Cell’ section as and when necessary.

12V CONST.

  1. The ‘12V Const.’ Output can be used to power any appliance requiring a regulated 12V d.c. power supply up to 2A current rating.
  2. A suitable plug for this output should be wired as follows:-

instructionsd2.htm_txt_square_cmp.gif (1913 bytes) viewed from solder connection side

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 and Cold cells and will control them adequately. It has however been found that the default settings are not appropriate for the accurate and steady control of the catalysis cell for one. In this configuration 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 and Cold cell power switches must not be disturbed at all. We recommend that the Hot power switch be set to med and the Cold power switch be set to low before continuing further.
  1. Set the required temperature by holding down the * button whilst using UP or DOWN keys, as appropriate.
  2. Press and hold UP and DOWN keys until ‘tunE’ is displayed. Release the buttons.
  3. Press DOWN key repeatedly until ‘CyC.t’.
  4. Hold * and hold UP key untilA - -‘. Release the buttons.
  5. Press UP key repeatedly until ‘tunE’.
  6. Hold * and press DOWN key once briefly to ‘on’. Release *.
  7. Press and hold UP and DOWN keys until ‘tunE’ disappears and a figure is displayed. Release the buttons.
  8. Plug the required cell in to its appropriate socket.
  9. Set the ‘Output Select’ switch to point to the output supplying the accessory in use.
  10. 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 = 2A anti-surge (115V), 1A anti-surge (230V);
12V Const. = 2A semi-delay; HOT = 4A semi-delay;
COLD = 1A semi-delay; 0-12V = 1A semi-delay (x2);
THUMPER = 4A semi-delay.
All fuses are 5x20mm types.

SPECIFICATIONS

The Mk2 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.
Thermocouple: Copper / Copper-Nickel (type T) or Nickel/Chromium / Nickel/Aluminium (type K) by selection of either of two input sockets and appropriate thermocouple elements.

OUTPUTS:

  1. 24V d.c. @ 3A (Heated cells) with High, Medium and Low energy settings (Full, Half and Quarter power respectively).
  2. 12V d.c. @ 1A with High and Low energy settings (Cold cells).
    Both (1) and (2) are controlled by the differential proportional thermostatic energy control unit.
  3. 12V d.c. @ 2A continuous.
  4. 2 x 0-12V d.c. (approx.) @ 1A. 1.2 to 12V d.c. infinitely adjustable using potentiometers, allowing variable rates of both rotation and vertical motion (Sample rotator).
  5. 24V d.c. @ 3A pulsed output, running at approx. 1Hz with manual on/off selection (Kinetic cells).

All outputs, with the exception of (1) and (5), are fully smoothed and regulated and all are fused. All negative lines are grounded and (2) are operator selected. (3) and (4) are continuous.(5) can be switched on/off independently. 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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