DEIF IOM4.2 Input module configuration instructions

DEIF IOM4.2 Input module configuration instructions

When the BEAD mA push-button is operated, the display of the selected Catalytic Control Card provides an indication of that card's sensor head current. Adjustments to this current can also be made if the Engineering Key is fitted to the Engineering Card.When the ALARMS push-button is operated, the display of the selected control card provides an indication of that card's level and type (rising or falling) of each alarm level (A1, A2, A3, STEL, LTEL). If the Engineering Key is fitted to the Engineering Card, adjustments can be made to the alarm levels, within pre-defined limits, and additional test facilities become available. This facility allows each alarm operation to be checked and, if required, its associated output relay to be exercised.

SIGNAL Push-button 

When the SIGNAL push-button is operated, the display of the selected control card provides an indication of that cards sensor signal as follows: a. 4 - 20mA Control Card - Loop current in mA. b. Catalytic Control Card - Catalytic bridge output (sensitivity) in mV. 3.3.10 ZERO Push-button The ZERO push-button can only be used when the Engineering Key is fitted to the Engineering Card and is used to calibrate the zero point of the selected control card.

SPAN Push-button

 The SPAN push-button can only be used when the Engineering Key is fitted to the Engineering Card and is used to calibrate the span point of the selected control card. 3.3.12 1ST SPAN Push-button The 1ST SPAN push-button can only be used when the Engineering Key is fitted to the Engineering Card and is used to calibrate the span point of a new catalytic sensor fitted to a selected catalytic control card. This function is used to provide an indication, in conjunction with subsequent normal span adjustments, of the output sensitivity of a catalytic sensor and to automatically indicate poisoning or loss of sensor performance.

CLOCK Push-button 

When the CLOCK push-button is operated, the display of the selected control card provides an indication of the time and date of the rack clock The rack clock is located in the Engineering Card, however since the Engineering Card has no display, a control card must be selected to enable the time and date to be displayed. It does not matter which control card is selected. If the Engineering Key is fitted to the Engineering Card, the time and date can be adjusted.

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