Display, Control loop, Data recorder – West Control Solutions ProVU 4 User Manual
Page 179
ProVU4 Controller, Profiler & Recorder/Controller - Product Manual
Page 178
Specifications
59407, Issue 1 – March 2008
Display
Display Type:
160 x 80 pixel, monochrome graphic LCD with a dual colour
(red/green) backlight.
Display Area:
66.54mm (W) x 37.42mm (H).
Display Characters:
0 to 9, a to z, A to Z, plus ( ) - and _
Trend View:
120 of 240 data points shown in a scrollable window. Data is not
retained when power turned off or if time base is changed.
Trend View Data:
Displays any active alarm plus PV input (solid) & Setpoint (dotted) at
sample time or Maximum & Minimum PV input value measured
between samples (candle-stick graph).
Trend View Y-axis Scaling
Auto scales for maximum resolution of display data, from 2 to 100%
of Input Span.
Trend View Sample Rate:
1; 2; 5; 10; 15; 30 seconds or 1; 2; 5; 10; 15; 30 minutes.
Control Loop
Tuning Types:
Pre-Tune, Auto Pre-Tune, Self-Tune and Manual Tuning
Proportional Bands:
Primary & Secondary (e.g. Heat & Cool) 0.5% to 999.9% of input
span in 0.1% increments, or On/Off control.
Automatic Reset
Integral Time Constant, 1s to 99min 59s and OFF
Rate
Derivative Time Constant, 1s to 99 min 59s and OFF
Manual Reset
Bias added each control algorithm execution.
Adjustable in the range 0 to 100% of output power (single output) or -
100% to +100% of output power (dual output).
Deadband/Overlap:
–20% to +20% of Primary + Secondary Proportional Band.
ON/OFF Differential:
ON/OFF switching differential 0.1% to 10.0% of input span.
Auto/Manual Control:
Selectable with “bumpless” transfer when switching between
Automatic and Manual control.
Control Cycle Times:
Selectable from 0.5 to 512 seconds in 0.1s steps.
Setpoint Range:
Limited by Setpoint Upper Limit and Setpoint Lower Limit.
Setpoint Maximum:
Limited by Scale Range Upper Limit.
Setpoint Minimum:
Limited by Scale Range Lower Limit.
Setpoint Ramp:
Ramp rate selectable 1 to 9999 LSD’s per hour and infinite.
Data Recorder
Recording Memory:
1Mb non-volatile flash memory (data retained when power is off).
Recording Interval:
1; 2; 5; 10; 15; 30 seconds or 1; 2; 5; 10; 15; 30 minutes.
Recording Capacity:
Dependant on sample rate and number of values recorded.
Example: 2 values can be recorded for up to 7 days at 10s intervals.
More values or faster sample rates reduce the maximum duration.
RTC Battery Type:
VARTA CR 1616 3V Lithium. Clock runs for >1 year without power.
RTC accuracy:
Real Time Clock error <1second per day.