Despatch MIC 1422

78
Alarms
Maximum Number: Two "soft" alarms plus Loop Alarm*
Maximum # Outputs: Up to 2 outputs can be used for alarm purposes
Combination Alarms: Logical OR or AND of alarms to an individual hardware output is
available.
Hysteresis: 1 LSD to 10% of span
Loop Alarm: Detects faults in the control feedback loop by continuously
monitoring process variable response to the control output(s)
Performance
Reference Conditions
Ambient Temperature: 20º C ± 2º C
Relative Humidity: 60 - 70%
Supply Voltage: 90 - 264 VAC 50 Hz ± 1 %
Source Resistance: <10 ohm for T/C input
Lead Resistance: <0.1 ohm/lead balanced (Pt100)
Performance Under Reference Conditions
Common Mode
Rejection: >120dB at 50/60Hz giving negligible effect at up to 264V, 50/60Hz
Series Mode
Rejection: >500% of span (at 50/60Hz) causes negligible effect
DC Linear Inputs
Measurement Accuracy: ± 0.25% of span ± -1 LSD
Thermocouple Inputs
Measurement Accuracy: ± 0.25% of span ± -1 LSD
Note: Reduced performance with Type B T/C between 100-600º C (212 - 1112º F)
Note: Thermocouple must not be grounded! Damage to the cold junction in
the control will result!
Linearization Accuracy: Better than ± 0.2º C any point, any 0.1º C range (± 0.05º C typical).
Better than ± 0.5º C any point, any 1º C range.
Cold Junction
Compensation: Better than ± 0.7ºC
RTD Inputs Measurement
Accuracy: ± 0.25% of span ± 1 LSD
Linearization Accuracy: Better than ± 0.2º C any point, any 0.1º C range (± 0.05ºC
typical).
Better than ± 0.5ºC any point, any 1ºC range.