Carbolite 200 User manual

MC00 –1.03
Operating Instructions
Temperature Controller
type 200
See also the main manual for the oven or other product to
which the controller is fitted.
CONTENTS
section page
1 Description 2
2 Basic Operating Instructions 3
3 Overtemperature Option 4
4 Power Limit 4
5 User Calibration 5
6 Navigation Diagrams 6

200 Controller
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1DESCRIPTION
1.1 200 Controller
The model 200 controller is a simple on/off controller made especially for Carbolite by
Eurotherm. It physically resembles the model 201 PID controller, but does not exhibit the PID or
certain other advanced features. It is supplied as an integrated part of the control section of the
oven or furnace.
The 200 is designed for easy use as a simple temperature controller, where on setting the required
temperature the controller immediately attempts to reach and maintain it.
The controller does not contain a real-time calendar, and is not subject to century-end date
problems.
1.2 Model 200 Overtemperature Controller
The 200 is optionally available as a dual unit containing the main controller and an
overtemperature controller. The 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.

200 Controller
MC00 –1.03 3
2BASIC OPERATING INSTRUCTIONS
2.1 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 oven for the
overall operating instructions.
To operate the 200 there must be power to the oven, and the Instrument switch must be on. If a
time switch is included in the oven circuit, this must be in an On period.
2.2 The 200 –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.
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 shown in the Navigation Diagram in section 6.
The Scroll key allows access to the parameters within a list. Some parameters are display-
only; others may be altered by the operator. A single press of the scroll key displays the
temperature units; further presses reveal the parameters indicated in the Navigation Diagram.
To return to the Home list at any time, press Page and Scroll together, or wait for 45
seconds.
The Down and Up 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 200 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 or Up 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.
Note: on the 200 display
the letters mand wlook
like nand u. In these
instructions the letters are
described as m and w.

200 Controller
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3OVERTEMPERATURE OPTION
This is only fitted when the overtemperature option is ordered. To identify whether it is fitted,
observe the controller panel: if it is fitted the overtemperature key and warning light are present.
The overtemperature key must be held depressed continuously while viewing or adjusting the
overtemperature controller. If the Overtemperature key is released, the display reverts to the main
controller.
With the key pressed the overtemperature setpoint is normally displayed. To alter the value, use
Down and Up. To view the measured temperature, press Scroll until PV (process variable) is
displayed, then press Down or Up. Keep the overtemperature key depressed during these
operations.
When an overtemperature condition is reached, the overtemperature warning light changes from
green to flashing red. To “accept” or “reset” this alarm condition, press the Overtemperature key
and the Page key together; the warning light changes to continuous red. Once the over-
temperature condition is cleared (by the temperature falling), the light changes to green and
normal operation resumes.
Audible Alarm (option only)
If an audible alarm is supplied for use with the overtemperature condition, then it is normally
configured to sound on overtemperature, and to go off when the alarm is acknowledged as
described above.
It is not possible to cover in this manual other possible alarm features which may be included by
customer special order.
4POWER LIMIT
There is no power limit parameter in the model 200.
Any reference to the power limit in the oven manual can be disregarded. If a power limit is
required, the 200 cannot be used.

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MC00 –1.03 5
5USER CALIBRATION
The controller is calibrated for life at manufacture against known reference sources, but there
may be sensor errors or other system errors. User calibration allows compensation for such
errors, and the 200 allows for a user 2-point calibration. This setting is password protected to
avoid accidental alteration.
Page to iP, scroll to CAL.P, and use Up to alter the password. The password is 3. If the correct
password is entered, the display shows PASS. Scroll to CAL and use or to observe the setting
FACt (factory values, as manufactured) or USEr (user values). Change to USEr.
NOTE: before checking the calibration of the controller, or of the complete system, remember to
reset the 201 to factory calibration values by setting the CAL.P parameter to FACt.
To enter a user calibration, scroll to each or the following parameters in turn and set the desired
values.
Pnt.L low temperature for which an offset is to be entered
OFS.L offset value for the low temperature
Pnt.H high temperature for which an offset is to be entered
OFS.H offset value for the high temperature
Example: the controller reads 3°C low at 400°C, and 5°C low at 1000°C. The parameter values
should be Pnt.L=400, OFS.L=3, Pnt.H=1000, OFS.H=5.
Negative or positive values can be entered: if the controller is reading high, negative offsets
would be appropriate.
Fig 4 gives a graphical representation of the 2-point calibration.

200 Controller
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6NAVIGATION DIAGRAMS
6.1 Main Controller
Home
List
Input
List
Access
List
20.0
iP
ACCS
OFS.H
CAL.P
CAL
Pnt.L
OFS.L
Pnt.H
codE


*C


*C


measured temperature;
use  /  to access
setpoint
user 2-point
calibration
for factory access to
lists and parameters
not available to the
operator
enter
password
if user
calibration

200 Controller
MC00 –1.03 7
6.2 Overtemperature Controller
Hold the Overtemperature Key to make the parameters in this diagram available.
Home
List
Access
List
20.0
ACCS
PV
codE



*C


calibration as
for main
controller
overtemperature
setpoint; use  /  to
alter
for factory access to
lists and parameters
not available to the
operator
*C
iP

measured
temperature at
overtemperature
sensor
Input
List

Copyright © 2014 Carbolite Ltd.
Carbolite, Parsons Lane, Hope,
Hope Valley, S33 6RB, England.
Telephone: [phone]
Fax: [phone]
E-mail: [e-mail]
MC00 –1.03