Parr-instrument 4857 Manual de usuario descargar pdf (Pagina 9)

4857 Reactor Controllers

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MODEL 4857 PROCESS CONTROLLER SPECIFICATIONS

Temperature Control Parameters

To facilitate start up with reasonably

good PID control parameters for heating

and cooling, all 4857 Process

Controllers are programmed at the

factory with the temperature control

settings shown on the right.

Output 1 on these controllers drives the

heater. Output 2 can be used to

activate a cooling system. Control

parameters can be set independently for

each of these outputs.

Module 1: Temperature Control

Cycle time 2 seconds

Proportional Band

25 °C

Integral Time 5 min

Derivative Time 25 sec

Input thermocouple

Type J

Operating range

0 to 800 °C

Display resolution

.1 °C

Setpoint resolution

.1 °C

System accuracy

+/- 0.1% FS

+/- 1°C typical

Control action

Three term PID control

plus limit control

Control output 1

15 amp @ 115V,

15 amp @ 230V

Control output 2

0.25 amp

Operating voltages

115 and 230 VAC

Maximum switching

load

15 amp @ 115 VAC

15 amp @ 230 VAC

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 37 38

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