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Specification subject to change without notice.
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MGC2-20
PolyGard
®
Multi-Point Controller
User Manual - MGC2-20
Page 17
3.6.5 Stage/Setpoint / Hysteresis
Each sensor point can have five stages with set point values. If the measured level is greater than the defined
stage/set point, the associated stage is set. If the level falls below the stage/setpoint plus the hysteresis then the
stage returns to original condition.
It is recommended that the unused stages be set to max of sensor range to avoid the alarm light from false
reporting.
For O
2
measurement on depletion consider when defining stage setpoints that stages will be set on a falling
measuring signal!
Symbol Description
Default
Status
Function
SP 01
Sensor Point
Selection SP No.
100
ppm
Threshold
100
100
200
200
300
15
Stage/setpoint1
Stage/setpoint2
Stage/setpoint3
Stage/setpoint4
Stage/setpoint5
Hysteresis
Sensor Value > Stage/Set point1 = Stage 1
Sensor Value > Stage/Set point1 = Stage 2
Sensor Value > Stage/Set point1 = Stage 3
Sensor Value > Stage/Set point1 = Stage 4
Sensor Value > Stage/Set point1 = Stage 5
Sensor Value < (Stage/Set pointX –Hysteresis)
= Stage X OFF
3.6.6 Delay time ON or OFF
Delay ON time begins when the Stage is exceeded and/or Delay OFF time when the Stage returns to normal
condition.
Symbol Description
Default
Status Function
SP 01
Sensor point
Selection SP No.
0 s
Delay Time ON 0
Concentration > Stage Threshold: Relay is only activated at
expiration of the defined time (sec.). 0 sec. = No Delay
0 s
Delay Time OFF 0
Concentration < Stage Threshold: Relay is only deactivated at
expiration of the defined time (sec.). 0 sec. = No Delay
3.6.7 Control Mode
Definition of the alarm evaluation by Current value (CV) or Average value (AV).
Symbol Description
Default
Status t Function
SP 01
Sensor Point
Selection SP No.
CV
Evaluation
CV
CV = Control the Current value
AV = Control the Average value
Current / Average Value Function See: 3.7.4
3.6.8 Assigned SP Fault to Relay
Define which stages are activated with a failure of the sensor point.
Symbol
Description
Default
Status
Function
SP 01
Sensor Point
Selection SP No.
Stage - 1 2 3 4 5
Fault - 1 1 0 0 0 Failure SP
1 1 0 0 0 0 = Stage not ON at SP Failure
1 = Stage ON at SP Failure