Chromalox 1020 User Manual

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Parameter Description Default Value
Linear Output Sub-menu
If the Linear option is fitted in Output 3, this sub-menu is visible.
Usage
Heat (Reverse acting control)
Cool (Direct acting control)
Retransmission of PV or SP: PV Retx, SP Retx
PV Retx
Type
0-10V
2-10V
0-20mA
4-20mA
0-5V
1-5V
0-10V
Scale Range Maximum
Display value at which retransmission output is at its
maximum value ( -1999 to 9999)
1000
Scale Range Minimum
Display value at which retransmission output is at its
minimum value ( -1999 to 9999)
0
7.5 Control Menu (For Standard Model only)
Parameter Description Default Value
Proportion Heat Band The Proportional Bands for heating and cooling control,
in display units. Set to ON/OFF (0) or PID control:
1 to 9999 - 0 decimal places
0.1 to 999.9 - 1 decimal place
0.01 to 99.99 - 2 decimal places
0.001 to 9.999 - 3 decimal places
Possible values/resolution depends on values display
resolution.
161
Proportion Cool Band
161
Auto Reset (Integral) 0.01 to 99.59. and OFF (0.00) (minutes & seconds). 5.00
Overlap/Deadband In display units, range -20 to +20% of Heat & Cool Pro-
portional Band
0
Differential (On/Off) Visible when using On-Off control.
In display units centred about the setpoint.
Range: 0.1% to 10.0% of input span
8
Loop Alarm Time Visible when On/Off control & Loop Alarm assigned to an
output.
Sets time before the loop alarm triggers.
(minutes & seconds)
99.59
Manual Reset (Bias) Manual Reset. Biasing of the control working point, 0 to
100%. (-100% to 100% if heat/cool control)
25%
Heat Cycle Time 0.1 to 512.0 seconds
Relay/SSR control output cycle times
32.0
Cool Cycle Time 32.0
Output Interlock Prevents simultaneous activation of both heat & cool
outputs. Choose from On or Off.
Do not use if PB ‘overlap’ has been set
Off
Heat Power Limit % heating and cooling power upper limits
0 to 100%
100%
Cool Power Limit 100%
Power Up Action
Last - Powers up with control enable/disable in the same
state as on power off or power failure.
On - Always powers up with control enabled.
Last
Automatic Tuning
Off
Start Pre-Tune
Start Tune at SP
(Not available for Heat & Cool processes.)
Off

Chromalox 1020 Specifications

General

Brand	Chromalox
Model	1020
Category	Temperature Controller
Language	English