1. Input to CH1 and CH2 is equal to type K thermocouple ranged 0-1200°C.
2. Output is equal to 4-20mA representing 0-1200°C selected from the highest measurement from CH1 and CH2.
3. If CH1 or CH2 is out of range 0-1200 then the output is equal to the good input.
4. If both CH1 and CH2 are out of range 0-1200 then the output is equal to 20mA.
5. RLY1 will close if either or both inputs are out of range.

Customising Operation

1. Use 'Con_a' and 'Con_b' to set the range max and range min values. (This can be done using the trim menu).
2. Use the RLY1 on and off delays to remove any chatter due to slight variations when input is the same as the range max or range min values (This can be done using the trim menu).
3. Use the modify wizard to change the input types used as required.

Program

File	Comment
Help	If unexpected results occur when loading the .usc file press back and click on help for instructions.
UAP1070a.usc	First Issue.
UAP1070b.usc	Changed auxiliary voltage from 8Vdc to 4Vdc. The inputs to the USC701 are thermocouple, this uses the most sensitive milivolt ranges on the USC. The input amplifier can accept a maximum input voltage of 4.5Vdc on this range. When the external 4M7 resistors were connected for upscale burnout and the thermocouple was open circuit the USC701 failed to go upscale as the auxiliary voltage was set to 8Vdc.
UAP1070c.usc	Same as issue b except that extra lines hace been added to aid in debuging and the svse for range checking has been moved to a common branch. The attached document uap1070c.pdf discribes the operation of the equation.