Carbolite 201 Operating Instructions Manual

Operating Instructions

Temperature Controller

type 201

(APPLICABLE WHEN ALARM FEATURE IS IN USE)

CONTENTS

section page

1 Description 1
2 Basic Operating Instructions 3
3 Overtemperature Option 5
4 Altering the Power Limit 5
5 User Calibration 6
6 Navigation Diagrams 7

See also the main manual for the furnace, oven or other

product to which the controller is fitted.

1

MC07 – 1.04

201 Controller

DESCRIPTION

1.1 201 Controller

The model 201 controller is made especially for Carbolite by Eurotherm, and shares many of the

features of the Eurotherm 2000 range, especially the model 2132. It is a digital instrument with
PID control algorithms. It is supplied as an integrated part of the control section of the oven or
furnace.

The 201 features:

- Easy use as a simple temperature controller, where on setting the required temperature the
controller immediately attempts to reach and maintain it.

- A ramp-to-setpoint feature, which may be used to limit the heating (or cooling).

- An alarm output which may be used in conjunction with a solid state relay for miscellaneous
control purposes.

The controller does not contain a real-time calendar, and is not subject to century-end date

problems.

1.2

Model 201 Overtemperature Controller

The 201 is optionally available as a dual unit containing the main controller and an

overtemperature controller. These two components share the same display and buttons, but are
otherwise independent.

The operational features in the overtemperature controller include:

- Easy setting of the overtemperature limit (setpoint);

- A visible alarm on overtemperature condition;

- A latching alarm output used to cut power to the heating elements; this alarm output can

also be used to power an optional audible alarm;

- 2-key alarm acknowledgement.

2

2 MC07

201 Controller

BASIC OPERATING INSTRUCTIONS

2.1 Furnace or Oven Controls

Most Carbolite products are fitted with an “Instrument Switch” which cuts off power to the

controller and other parts of the control circuit. See the instruction manual for the furnace or
oven for the overall operating instructions.

To operate the 201 there must be power to the furnace or oven, and the Instrument switch must

be on. If a time switch is included in the furnace or oven circuit, this must be in an On period.

2.2

The 201 – Operation

When switched on, the controller lights up, goes through a short test routine, and then displays

the measured temperature and starts to control. The output light glows or flashes as heating
occurs.

N

ote: on the 201 display

the letters

m and w look

like

n and u. In these

instructions the letters are
described as m and w.

The Page key  allows access to parameter lists within the controller; most lists and parameters

are hidden and cannot be accessed by the operator because they contain factory-set parameters
which should not be changed.

A single press of the page key  displays the temperature units, normally set to °C; further

presses reveal the lists indicated in the Navigation Diagram in section 6.

The Scroll key 4 allows access to the parameters within a list. Some parameters are display-

only; others may be altered by the operator. Some parameters only appear in appropriate
circumstances – for example, working setpoint does not appear if setpoint ramp rate is Off.

A single press of the scroll key 4 displays the temperature units; further presses reveal the

parameters in the current list indicated in the Navigation Diagram.

To return to the Home list at any time, press Page  and Scroll 4 together, or wait for 45

seconds.

The Down T and Up S keys are used to alter the setpoint or other parameter values.

2.3

Basic Operation

Normally no operator action is required other than entering the setpoint, as the 201 starts to
control on being switched on, as described above.

2.4

Altering the Setpoint

With the display at “home”, showing the measured temperature, press Down T or Up S once to

display the setpoint; press again or hold down to adjust it. The display returns to the measured
temperature when no key is pressed for 0.5 seconds.

2.5

MC07 3