Specifications

Section 1
1-10 LA-306 Operation & Theory
1.4.5 STATUS Panel
A. READY lamp
When all zones have heated to their SV setpoint values and the controllers have
reported all PV process temperatures as within temperature deviation limits, the
process READY light (green) on the STATUS panel will turn ON. The furnace is
then ready to process parts.
B. ALARMS
When lighted, these red LED indicators show what condition caused the alert or
alarm. An alert condition will only produce an audible and visual warning; an
alarm condition will produce an audible and visual warning and shut off the lamps
as well. Any alert or alarm condition will shut off the READY Lamp.
C. ZONE TEMP DEVIATION alert indicator
A zone has experienced a process temperature outside the setpoint temperature +/-
the ALM1 limits set in the zone controller. Factory setting is +/- 10⁰C.
D. OVER TEMPERATURE alarm indicator
A zone has experienced a process temperature higher than the ALM2 limit set in
the zone controller and the lamps have been turned OFF. Factory setting is 1005
°C.
E. AIR PRESSURE LOW alert indicator (optional)
The CDA (clean, dry air) gas manifold has insufficient gas pressure, effecting operation. Setpoint mechanically
set at the factory.
F. N2 PRESSURE LOW alert indicator (optional)
The N2 (nitrogen) gas manifold has insufficient in gas pressure, effecting operation. Setpoint mechanically set
at the factory.
G. FG PRESSURE LOW alert indicator (optional)
The FG (forming gas, H2/N2 mix) gas manifold has insufficient gas pressure, effecting operation. Setpoint
mechanically set at the factory.
H. CLEAR pushbutton with lamp
This red lamp lights with any alert or alarm condition.
Pressing the button will clear all alerts and alarms and will immediately shut off the CALIBRATE function, if
active, on the TEST panel.
Persisting alert and alarm conditions will re-light the lamp, however, so it is best to correct the cause of the alert
or alarm condition before pressing the CLEAR button.
I. BUZZER
This is an audible signal of any alert or alarm condition.
SILENCE pushbutton with lamp
Press the SILENCE button to silence the buzzer. This will also turn on the SILENCE red lamp as a reminder to
the operator that the buzzer is off.
Pressing the SILENCE button again will enable the audible buzzer and turn off the SILENCE lamp.
J. SILENCE switch with red lamp
Turn the SILENCE switch CW to silence the buzzer. This will also turn the SILENCE red lamp ON as a
reminder to the operator that the buzzer is OFF.
Silencing alerts is useful when changing setpoint temperatures, calibrating the SCRs, or auto tuning a zone.
Turning the lighted SILENCE switch CCW will enable the audible buzzer and turn the SILENCE lamp OFF.
Figure 1-16 Status Panel
and Alarm Controls