Process Technology DQ15D Instruction Manual page 4

**WARNING**
Over-temperature protection is necessary in any system where a fault
condition resulting in high temperature could produce a fire or any other
hazardous condition. Operation without thorough safety precautions can
result in equipment failure, property damage and personal injury.
Over Temperature Protection Device with Low Level Cut-off
Sample Wiring Diagram (your wiring may differ)
SET POINTS AND FEATURES
"SP1" Heat Set Point
The control normally displays the actual process temperature. To view
the "SP1" SET POINT value, press the decrease " " button once and
release. The control will display the letter "H" and a decimal point fol-
lowed by a number between -40 and +999 (the numeric range of the
controller). After 7 seconds the display will automatically return to nor-
mal.
Note: The units displayed, ºC, ºF, Hz, volts, mA or ohms are estab-
lished during the setup of the control.
To alter the set point value, press the "SET" button while the set point
value is still displayed. The number on the display will begin flashing.
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Once the number begins flashing, use the increase " " or decrease " "
key to change the value. After the new value has been established, press
the "SET" key once more to lock the new value into memory.
Note: If the "SET" key is not pressed within 5 seconds, the new value
will be lost and the set point value will revert to its previous setting.
"SP2" Cool Set Point
The control normally displays the actual process temperature. To view
the "SP2" SET POINT value, press the decrease " " button twice and
release. The control will display the letter "C" and a decimal point fol-
lowed by a number between -40 and +999 (the numeric range of the
control). After 7 seconds the display will automatically return to normal.
Note: The units displayed, ºC, ºF, Hz, volts, mA or ohms are estab-
lished during the setup of the control.
To alter the set point value, press the "SET" button while the set point
value is still displayed. The number on the display will begin flashing.
Once the number begins flashing, use the increase " " or decrease " "
key to change the value. After the new value has been established, press
the "SET" key once more to lock the new value into memory.
Note: If the "SET" key is not pressed within 5 seconds, the new value
will be lost and the set point value will revert to its previous setting.
"P" Power-Save Set Point (Stand-by)
The Power-Save feature permits the user to establish a second heating
set point. When the established value is set lower than the normal "SP1"
heat set point, it will reduce heating power through this lower set point
whenever the Power-Save feature is turned on.
To turn on the Power-Save feature, press all three keys (" ", "SET",
and " ") simultaneously. As an alternative, you may install an external
switch to close contacts #3 and #4 on the rear terminal strip. NEVER
DO BOTH. When the control is operating in the Power-Save mode, the
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