OM0133
18
Figure 1: Direct Heat Control Inputs & Outputs
8.3.5
Provision for add-on expansion capability
Chart recorder output option
Automatic tank switch option
RS-232 output
8.3.6
Diagnostic and calibration assists.
Individual analog inputs may be displayed to assist calibration.
Individual outputs may be forced to an on or off condition.
Individual digital inputs may be displayed.
Front panel lamps may be tested.
Memory and internal processor diagnostics may be selected.
All options may be individually tested.
Packaging is designed such that all accessories are easily removed and replaced
8.4
Front Control Panel Description
The system front control panel contains the following functions BCD-09439.
8.4.1
Heat Jacket Status LED
The green LED indicates when the chamber heater is turned on. A blinking LED indicates the
chamber heater is being cycled to maintain chamber setpoint temperature.
8.4.2 Inject
CO
2
Status LED
The green LED indicates when the CO
2
control valve is open and CO
2
is flowing into the
chamber. When it blinks on/off briefly, the system is injecting CO
2
to maintain setpoint.
8.4.3
Door Ajar Status LED
The door ajar yellow LED indicates when the inner glass door is not closed and latched. The
LED acts up on a magnetic switch located along the lower right corner of the inner glass door.
The LED blinks after door is closed, indicating door delay time 40 second default)
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