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CLASSIC 800 Product Manual
Introduction
I. THE KAYDEN CLASSIC 800 - DIGITAL ELECTRONICS FEATURES
The CLASSIC 800 is versatile, rugged, cost effective and easy to use. All setup and adjustments may be
performed using the Display Panel buttons. The CLASSIC 800’s Display Panel displays process condition
(flow, level & interface) via the Thermal Signal Bar Graph as well as Relay state, Timer functions and operating
conditions via individual LEDs. The CLASSIC 800 may also be remotely controlled and/or monitored via RS-485
using the Kayden RCM (Remote Control & Monitoring) Software and the Serial Communication Adapter (SCA)
and communication cable.
Kayden’s CLASSIC 800 series uses an advanced microprocessor to perform continuous
self-test diagnostics
on
the Electronics Module and the sensor elements.
•
Any open or shorted connection will result in an error indication that also opens all output contacts and
disables the heater circuitry.
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An internal watchdog circuit ensures that the microprocessor code is performing as expected and a
secondary external watchdog circuit ensures that the microprocessor itself is functioning. Both circuits
force the contacts open, illuminate the Fault LED, turn the heater off and de-energize the relays in the
event of a malfunction. This prevents the heater running out-of-control that could result in excessive
temperatures on the probe or a burnt-out heater.
•
The microprocessor also monitors the heater for out-of-range conditions. For example in a level
application when the sensor is “dry” for an extended period of time, the heater will cycle between its
current setting and a lower power rating until such time as the sensor is again submerged.
