Watlow Controls 8LS, User Manual

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114 8LS User’s Guide
Appendix B: 8LS-CP
If you want to disable the enrichment gas during the burn off period, a
Normally Open solenoid valve should be installed in the enriching gas
line and powered from the same SSR that is supplying power to the burn
off air solenoid valve.
In both modes, the control output signal will be held an additional two
minutes after the burn off period to allow the probe to stabilize before
resuming automatic control.
The burn off function digital output will be turned Off if the probe T/C
exceeds the maximum allowable probe temperature of a selectable 1900
or 2100
º F. It will remain off until the temperature falls at least 100 º F
below the selectable limit.
Setup Menus
This section describes the additional editing parameters for the CP
functions.
Setup Inputs
Input Type
For the Reference Temperature Loop input, there are only four
selectable T/C types available: K, R, S, N.
Selectable Values: K, R, S, N.
For the Carbon Probe Loop input, three engineering functions types
are available: Carbon Potential(CP), Dewpoint (DP), or Millivolt(MV).
Upon selecting either CP or DP another menu item becomes available:
CO+CO2% and % of Hydrogen. The mV selection is not referenced to
the temperature loop and is a direct reading of the probe millivolts.
Selectable values: CP, DP, or MV.
1 2 3 4 5 6 7 8
LOOP PROCESS UNITS
ALARM SETPOINT STATUS OUTPUT%
1 INPUTS
TYPE? K
1 2 3 4 5 6 7 8
LOOP PROCESS UNITS
ALARM
SETPOINT
STATUS OUTPUT%
2 INPUTS
TYPE? CP