Athena 6000 Instrukcja obsługi - Strona 13

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Start-Up

Operating Instructions

Before line voltage is applied, double check all items

connected to controller: The correct type thermocouple

(see section on thermocouples, p. 11) must be on

terminals 1 and 2 (red on 2) with no AC or DC voltage

leading or arcing to it. Proper terminals selected for

line voltage (8 & 10 for 240V). No heater shorts or

shorts to ground. No exposed bare wires or frayed

insulation.

On very fast processes heaters should be temporarily

disconnected to give operators familiarization time

without exceeding safe temperature limits of the

process.

Set point: Apply power. After allowing a few seconds

for initialization, the upper display will indicate

thermocouple temperature at the process, the lower

display wil show set point temperature, and the index

indicator illuminates set point (SP). The status (output)

indicator will pulse with a greater "on" time as the

difference between actual process temperature and set

point widens, and at lesser "on" time as the difference

narrows.

To establish a setpoint, first make sure the index

light is still on (SP). Then depress the UP button to

increase the value shown in the lower display, or the

DOWN button to decrease it, until the desired setpoint

is reached. To retain this parameter in the non-volatile

memory, depress the "enter" key E. Display will blink.

Alarms: Depress index key (I) until index indicator

lights at (Al). Now set alarm one trip point by up or

down keys as before. Enter (E). If configured as

deviation tracking alarm, the lower display shows

difference between set point and the point where alarm

is triggered. (See p. 10 to select alarm functions).

Depress index key (I) again and advance to alarm 2

(A2). Set as above.

Rate: Advance index to rate (RT). This is the rate

(differential or anticipating) action adjustment,

calibrated in seconds. It is software connected to

automatic reset (integral or droop correcting) action,

which automatically tracks rate.

This wide range, high resolution, single button entry

greatly simplifies tuning the control to the process.

emporarily run it down to zero (proportional only) and

enter (E).

Gain:

Heat

Heat gain (HG), the next index position,

sets controller gain for heat control. It is the inverse of

proportional band (P.B.) which can be calculated as

ºP. B. = Full Scale º/Gain. At HG = 0, heat is off.

Temporarily set HG = 400 or about 3.5º prop. band on

"J" couple units, 5º on "K". Proceed to set the next

parameter.

Heat cycling (HC) is next. It should be set to the

longest possible cycling time in seconds (depending on

the mass of process) for increased life expectancy of

relays. 15 to 30 seconds for massive loads, 10 to 15 for

fast loads when relay driven. "T" output solid state