Athena 2000 Series Operation Manual

13
Symptom. Temperature overshoots, or
oscillates
Check - Check bandwidth
Loose heater or sensor t. Poor relative location.
Probable Cause.
- Process overpowered
- Bandwidth too narrow
- Process or sensor lag
Corrective Action
- Reduce total heater power
- Widen band
- Improve t, locate closer together
Symptom. Process control temperature
stabilizes above or below set- point as
read on deviation meter
Check - O󰀨set (manual reset) Heater to ground resistance.
Design parameters for process heat required
Probable Cause.
- O󰀨set (manual reset) incorrectly adjusted
- Partial short to ground in heater when
used on 240 V line
- No output from suspect control
- Controller reading other zones of multi-
controlled process
- Full output from suspect control
- Apparent stabilization from other zones of
multi-controlled process
- Improperly sized heater
Corrective Action
- Adjust (+) to increase controlled temp. (-) to decrease temp.
- Replace defective heater

Athena 2000 Series Specifications

General

Input Types	Thermocouple, RTD
Output Types	Relay
Control Modes	PID, On/Off
Alarms	Deviation
Display	LED
Power Supply	100-240 VAC
Communication	RS-485