TC310VP Instruction Manual
Powtier Controls Limited
ALARM SETTING
PROCEDURE FOR SETTING ALARM ON TC310VP
For alarm setting purposes, the controller may be in either the control or the open loop mode, provided that
the input signal from the sensor to the controller remains steady at any convenient level during the short
period of time that it takes to set the alarm level.
1. STEPS IN SETTING UP A HIGH ALARM LEVEL
1.1 Ensure that the sensor input to the controller is at a steady temperature T1.
1.2 Turn the alarm setting control P12 fully clockwise.
1.3 Decide how many degrees above the set temperature the alarm must operate. Let this be t degrees.
1.4 By means of the thumbwheel, adjust the set temperature of the controller to be t degrees lower than the
sensor input temperature T1.
1.5 Adjust the alarm setting control P12 anti-clockwise until the alarm relay LED just comes on. The high
alarm will now operate at t degrees above any chosen set point temperature.
2. STEPS IN SETTING A LOW ALARM LEVEL
2.1 Ensure that the sensor input to the controller is at a steadytemperature T1.
2.2 Turn the alarm setting control P12 fully clockwise.
2.3 Decide how many degrees below the set temperature the alarm must operate. Let this be t degrees.
2.4 By means of the thumbwheel, adjust the set temperature of the controller to be t degrees higher than the
sensor input temperature T1.
2.5 Adjust the alarm settin congtrol P12 anti-clockwise until the alarm relay LED just comes on.The low alarm
will now operatre at t degrees below any chosen set point temperature.
3. STEPS IN SETTING UP A BAND ALARM
The band alarm operates when the actual temperature is t degrees higher than the set temperature or t
degrees lower than the set temperature. Therefore the band alarm may be set by setting up the high end in
the same manner as section one above or by setting the low end in the same manner as section two above.
14 March 1995
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310VPIM
Issue 2.0
