Carbolite Type 301 User manual

MC16-EN – 1.04
Operating Instructions
Temperature Controller
T
yp
e 301
English / °C

Introduction
2 MC16-EN – 1.04
Contents
Section Title Page
1 Introduction to the Controller and Manual 4
1.1 Using This Manual 4
1.2 PID Control 4
1.3 Key Stroke Diagrams 4
2 Basic Operation 5
2.1 Keys 5
2.2 Indicators 5
2.3 Menu System 5
2.4 Home display 6
2.5 Hold Mode 6
2.6 Checking the Temperature Setpoint from the Home display 7
2.7 Changing the Temperature Setpoint 7
2.8 Changing the Temperature Setpoint Ramp Rate 7
2.9 Changing the Timer Time 7
3 Advanced Operation 8
3.1 Entering the Set Up menu 8
3.2 Changing the Timer Type 8
3.3 Changing the Timer Band 8
3.4 Changing the Maximum Output Power 9
3.5 Changing the Customer Calibration Type 9
3.6 Calibration Password 9
4 Temperature Setpoint Ramp Rate 10
4.1 Setpoint Ramp Rate 10
4.2 Limitations of setpoint Ramp Rate 10
5 The Timer 10
5.1 Starting the Timer 10
5.3 Pausing The Timer 10
5.4 Resetting The Timer 11
5.5 Timer Function Description 11
5.6 The Timer Temperature Band 11
5.7 Timer Function Table 12
6 Ramp Dwell 13
6.1 Setting up a Ramp Dwell program 13
7 Maximum Output Setting 15
8 Customer Calibration 15
8.1 Factory Calibration - FAct 15
8.2 Single Point Calibration - C.CL1 15
8.3 Dual Point Calibration - C.CL2 16
8.4 Changing the Calibration, Low Temperature – CAL.L 16
8.5 Changing the Calibration, Low Temperature Offset - OFS.L 17
8.6 Changing the Calibration, High Temperature – CAL.H 17
8.7 Changing the Calibration, High Temperature Offset - OFS.H 17

Contents
3
MC16-EN– 1.04
9 Overtemperature protection 18
9.1 Overtemperature (O/T) Home Display 18
9.2 Changing the Overtemperature Limit 19
9.3 Checking the Overtemperature sensor temperature 19
9.4 Overtemperature Protection Calibration 19
9.5 Overtemperature Activation 20
9.6 Resetting Overtemperature Activation 20
10 RS232 Communication 20
10.1 RS232 Communication Addressing: 20
10.2 RS232 Communication Cables 21
11 Navigation Diagrams 21
12 Controller Fault 22
12.1 Fault Code Diagnostic Table 22
13 Glossary of Terms 22

Introduction
4 MC16-EN – 1.04
1 Introduction to the Controller and Manual
1.1 Using This Manual
This manual aims to explain how to set up and operate the 301 controller; it must be read in
conjunction with the product main manual.
Due to the complex nature of furnace or oven control the use of technical terms throughout
this manual is unavoidable. Explanations of these terms can be found in the ‘Glossary of
Terms’ at the back of this manual.
1.2 PID Control
The 301 controller uses PID (Proportional Integral Derivative) temperature control. This
type of control uses a complex mathematical control system to adjust the power being sent
to the elements and hold the furnace or oven at the desired temperature.
1.3 Key Stroke Diagrams
Throughout this manual, key stoke diagrams are used to quickly describe the key presses
required on the controller to alter the desired value.
Examples of key press sequences:
This symbol denotes a single press of the Page Key
This symbol denotes a single press of the Up Key or the Down Key
This symbol denotes pressing and holding the Page key for 1.5 seconds
Hold
This symbol denotes a single press of the Up Key and the Down Key for 1.5
Secs
Hold Together
Hold These symbols denote holding the Overtemperature key down
while pressing the Page key, followed by the Up or Down arrow
key.
OPHi
These symbols denote holding the Page key for
1.5 seconds, pressing the Page key twice (OPHi
should be showing on the display) then pressing
the Up or Down arrow key.
Hold

Basic Operation
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MC16-EN – 1.02
2 Basic Operation
2.1 Keys
Page Key
The Page key is used to scroll through the
parameters and switch between menus.
Timer Key
The Timer key is used to start, view, pause
and reset the timer.
Arrow Keys
The Arrow keys are used to adjust
the value of the selected
parameter and pause the output
power.
Overtemperature
Key
The Overtemperature key is used to access
the Overtemperature menu.
Note: Overtemperature is an option
2.2 Indicators
Output Indicator
The Output indicator shows when the
controller is sending power to the elements.
Timer Indicator
The Timer indicator shows when the timer is
active.
Overtemperature
Indicator
The Overtemperature indicator shows green
in normal use. It flashes red when
overtemperature is triggered and is constantly
red when overtemperature is reset and waiting
for the temperature to drop.
2.3 Menu System
The 301 controller is divided into two menus; the home menu and the set up menu. The
home menu contains all the basic operating controls: setpoint, setpoint ramp rate and timer
time. The set up menu contains all the set up features: timer type, timer band, output power
and customer calibration. The features available vary depending on user input or product
specification.

Basic Operation
6 MC16-EN – 1.04
2.4 Home display
The Home display is the first display you see when the controller is switched on. It shows
the actual temperature of the furnace or oven and will be referred to as PV throughout this
manual. If you enter the menus, the controller will automatically return to the Home display
if no keys are pressed for 30 seconds.
2.4.1 Finding the Home display from the Home menu
Press the Page key until the PV is shown on the display (301 shown as example).
2.4.2 Finding the Home screen from the Set up menu
Press and hold the Page key for 1.5 seconds
2.5 Hold Mode
Hold mode turns the output off; this allows for parameters to be set without the controller
instantly trying to control at the new settings.
Hold mode is shown on the display by the output indicator being off and the home display
flashing between the PV and HOLd.
To enter Hold mode:
Start at the Home display
Press and hold the Up and Down arrow keys together for 1.5 seconds.
The display will flash HOLd to show that hold mode has been entered.
To exit Hold Mode:
Start at the Home display.
Press and hold the Up and Down arrow keys together for 1.5 seconds OR start the timer
(See section 5).
Note: The Hold Mode function is disabled when the Timer function is running.
Hold Together
301
Hold

Basic Operation
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MC16-EN– 1.04
2.6 Checking the Temperature Setpoint from the Home display
Start at the Home display
Press an Up or Down arrow key.
The display will then flash SP%C 3 times.
The Setpoint will show on the display for 3 seconds before returning to the Home display.
2.7 Changing the Temperature Setpoint
Start at the Home display
Press the Page key to scroll through the home menu until SP%C shows on the display
Use the Up and Down arrow keys to alter the value (°C) – a single press shows the current
setting, To alter, either keep pressed or press again.
The value will then be stored without any further input.
2.8 Changing the Temperature Setpoint Ramp Rate
Start at the Home display.
Press the Page key to scroll through the home menu until SPrr shows on the display.
Use the Up and Down arrow keys to switch off or alter the value (°C/min) – a single press
shows the current setting. To alter, either keep pressed or press again.
The value will then be stored without any further input.
See section 4 for more information on Temperature Setpoint Ramp Rate.
2.9 Changing the Timer Time
Start at the Home display.
Press the Page key to scroll through the home menu until T1, t2, t3, t4 or t5 shows on the
display.
Use the Up and Down arrow keys either to switch off or alter the value (Hr:Min) – a single
press shows the current setting. To alter either keep pressed or press again.
The value will then be stored without any further input.
See section 5 for more information on The Timer.
T1
SPrr
SP%C

Advanced Operation
8 MC16-EN – 1.04
3 Advanced Operation
3.1 Entering the Set Up menu
Start at the Home display.
Press and hold the Page key for 1.5 seconds
The display will change to the first parameter in the set up menu.
3.2 Changing the Timer Type
Start at the Home display.
Press and hold the Page key for 1.5 seconds to enter the set up menu.
Press the Page key until t.tYP shows on the display.
Use the Up and Down arrow keys to alter the value (t1 to t5) – See section 5. – a single
press shows the current setting, To alter, either keep pressed or press again.
The value will then be stored without any further input.
Note: This function is disabled when the timer is running.
See section 5.5 and 5.7 for more information on the timer types and functions.
3.3 Changing the Timer Band
Note: This is only available when timer type 1 or 4 is selected.
Start at the Home display.
Press and hold the Page key for 1.5 seconds to enter the set up menu.
Press the Page key until t.bnd shows on the display.
Use the Up and Down arrow keys either to turn off or alter the value – a single press shows
the current setting, To alter, either keep pressed or press again.
The value will then be stored without any further input.
See section 5.6 for more information on The Timer Temperature Band.
Hold
t.tYP
Hold
t.tYP tbnd
Hold

Advanced Operation
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MC16-EN– 1.04
3.4 Changing the Maximum Output Power
Note: Output Power is a product specific setting and will not appear on all furnaces and
ovens
See section 7 for more information on Output Power.
Start at the Home display.
Press and hold the Page key for 1.5 seconds to enter the set up menu.
Press the Page key until OPHi shows on the display.
Use the Up and Down arrow keys to alter the value (% power) – a single press shows the
current setting. To alter either keep pressed or press again.
The value will then be stored without any further input.
Caution: Do not increase the power limit value to a value above the design level for the
oven or furnace model, or to a value above that correctly calculated for Silicon Carbide
elements. The heating elements could burn out, or other damage could be caused. Refer to
the main manual supplied with the Furnace or Oven.
3.5 Changing the Customer Calibration Type
Start at the Home display.
Press and hold the Page key for 1.5 seconds to enter the set up menu.
Press the Page key until CL.St shows on the display.
Press the Up or Down arrow key to display the current calibration type -
(FAct, C.CL1 or C.CL2)
Press the Up or Down arrow key to display the password screen.
Press the Up or Down arrow keys to enter the Calibration Password (Section 3.6).
Press the Page key to confirm the password.
Use the Up and Down arrow keys to select the calibration type.
The value will then be stored without any further input.
See Section 8 for more information on Customer Calibration.
3.6 Calibration Password
Once entered the calibration password remains active for 30 seconds after leaving the
setup menu to allow time to revisit if necessary.
The Calibration Password for this instrument is: 525
OPHi
Hold
CL.St PASS
Hold

Ramp Dwell Programming
10 MC16-EN – 1.04
4 Temperature Setpoint Ramp Rate
4.1 Setpoint Ramp Rate
The setpoint ramp rate controls the rate at which the temperature in a furnace or oven
changes over 1 minute. It can be set for heating and cooling applications.
Setpoint ramp rate is useful when materials susceptible to thermal shock are being used.
4.2 Limitations of setpoint Ramp Rate
The setpoint ramp rate should not be set higher than the maximum heat up or cool down
rate of the furnace or oven.
The setpoint ramp rate only resets its start position when the ramp rate is changed or the
controller it taken out of Hold mode.
Changes in the temperature setpoint do not affect the ramp rate.
If the temperature is set below the current temperature of the furnace or oven then after a
period of time adjusted to a temperature higher than the current temperature with out
adjustment of the ramp rate, the controller can become out of step and appear to switch off.
Putting the controller in to, then out of Hold mode will reset the ramp rate and force the
controller back into control.
5 The Timer
5.1 Starting the Timer
Start at the Home display.
Press the Timer key once to start the timer.
If you are in Hold Mode, pressing the timer key will automatically exit Hold Mode and the
controller will start to run.
5.2 Checking the time remaining
While the Timer is running
Start at the Home display
Press the Timer key once to check the time remaining.
The display will then flash t- 3 times.
The time remaining will show on the display for 3 seconds before returning to the home
display.
5.3 Pausing The Timer
Start at the Home Display
Press and hold the Timer key for 1.5 seconds. The display alternately shows t1
and PU. To resume the timer press the Timer key once.
Hold

Ramp Dwell Programming
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MC16-EN– 1.04
5.4 Resetting The Timer
When the Timer count has ended or the timer is paused.
Start at the Home display
Press and hold the Timer key for 1.5 seconds
rst is displayed to indicate timer reset.
5.5 Timer Function Description
The 301 controller has an in-built timer, which can be set to one of five types:
Timer Type t1
On pressing the Timer key; Timer Type 1 waits for the setpoint to be reached, then
begins the countdown. On completion of the countdown, the furnace or oven
switches the power off to the elements (End flashes on the display).
Timer Type t2
On pressing the Timer key; Timer Type 2 starts the countdown immediately. On
completion of the countdown, the furnace or oven switches the power off to the
elements (End flashes on the display).
Timer Type t3
On pressing the Timer key; Timer Type 3 immediately switches the furnace or oven
off and starts to countdown. On completion of the countdown, the furnace or oven
switches the power on to the elements.
Timer Type t4
On pressing the Timer key; Timer Type 4 waits for the setpoint to be reached then
begins the countdown. On completion of the countdown, the furnace or oven
continues to control as normal (End flashes on the display).
Timer Type t5
On pressing the Timer key; Timer Type 5 starts the countdown immediately. On
completion of the countdown, the furnace or oven continues to control as normal
(End flashes on the display).
5.6 The Timer Temperature Band
Timer type t1 or t4 starts the count down when the setpoint temperature is reached. It is
possible to set the timer going before setpoint is reached by adjustment of the timer
temperature band t.bnd. e.g. t.bnd set to a value of 3 will result in the timer starting to count
down 3°C before the temperature setpoint is reached. This is practically useful when
furnaces or ovens that take a long time to reach setpoint are at a sufficiently high
temperature for a given customer process to occur.
Hold

Ramp Dwell Programming
12 MC16-EN – 1.04
5.7 Timer Function Table
T.tYP On Pressing the
Timer key During the Countdown
On completion
of the
Countdown
T1
Output On On Off
Timer Starts when Setpoint
reached Counts Down Off
Display Flashes t1 3 times.
Shows Time left for 3 secs. PV Cycling PV / End
Timer
Indicator Flashing until setpoint
reached On Off
t2
Output On On Off
Timer Start Immediately Counts Down Off
Display Flashes t2 3 times
Shows Time left for 3 secs PV Cycling PV / End
Timer
Indicator On On Off
t3
Output Off Off On
Timer Start Immediately Counts Down Off
Display Flashes t3 3 times
Shows Time Remaining Time Remaining END shows 3 secs then
PV
Timer
Indicator On On Off
t4
Output On On On
Timer Starts when Setpoint
reached Counts Down Off
Display Flashes t4 3 times
Shows Time left for 3 secs PV Cycling PV / End
Timer
Indicator Flashing until setpoint
reached On Off
t5
Output On On On
Timer Start Immediately Counts Down Off
Display Flashes t5 3 times
Shows Time left for 3 secs PV Cycling PV / End
Timer
Indicator On On Off

Ramp Dwell Programming
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MC16-EN– 1.04
6 Ramp Dwell Programming
The 301 controller has the capability to follow a Ramp Dwell program.
6.1 Setting up a Ramp Dwell program
Set the Controller to Hold Mode:
Start at the Home display
Press and hold the Up and Down arrow keys together for 1.5 seconds.
The display will flash HOLd to show that hold mode has been entered.
Set the Timer Type to t1
Start at the Home display.
Press and hold the Page key for 1.5 seconds to enter the set up menu.
Press the Page key until t.tYP shows on the display.
Use the Up and Down arrow keys to set the value to t1
The value will then be stored without any further input.
See Section 5.6 for the timer temperature band setting.
Time
Setpoint
ramp rate
SPrr
Dwell time
t1
Temperature
Natural cool
down
Hold Together
t.tYP
Hold

Ramp Dwell Programming
14 MC16-EN – 1.04
Set the Temperature setpoint.
Start at the Home display
Press the Page key until SP%C shows on the display
Use the Up and Down arrow keys to alter the value (°C)
The value will then be stored without any further input.
Set the Setpoint ramp rate
Press the Page key until SPrr shows on the display.
Use the Up and Down arrow keys to switch off or alter the value (°C/min)
The value will then be stored without any further input.
Set the Dwell time
Press the Page key until T1 shows on the display.
Use the Up and Down arrow keys either to switch off or alter the value (Hr:Min)
The value will then be stored without any further input.
Start the Timer
Start at the Home Display
Press the timer key to start the program.
Pressing the timer key will also automatically exit hold mode if set (see section 2.5)
and the controller will start to run.
SP%C
SPrr
T1

Customer Calibration
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MC16-EN– 1.04
7 Maximum Output Setting
Depending on the furnace or oven model the maximum output power setting OPHi may be
accessible or hidden.
For silicon carbide heated furnaces the parameter is accessible to allow compensation for
element ageing, refer to the product manual for details.
In many models the maximum output power setting depends on the supply voltage, refer to
the product manual for details.
8 Customer Calibration
The controller is calibrated for life at manufacture, there may however be sensor or other
system errors which affect the accuracy of the measured temperature. Customer calibration
is used to compensate for these errors. This function is disabled when the timer is running.
The 301 controller has three types of customer calibration: factory calibration, single point
calibration and dual point calibration. See section 3.5 & 3.6 to access these.
8.1 Factory Calibration - FAct
Factory calibration is the default setting, which has no offset adjustment. It simply displays
the temperature measured by the control thermocouple.
8.2 Single Point Calibration - C.CL1
Single point calibration uses an offset value to adjust the temperature over its whole range.
Single point calibration accurately sets the temperature for setpoint values close to the
temperature at which the calibration offset is made. This accuracy is reduced for setpoint
temperatures which are significantly higher or lower than this.
Table showing examples of how to determine offset values
The calibration temperature may be measured at the centre of the chamber or through a
specially fitted port.
New Offset Value = Old Offset Value + New Offset adjustment
New Offset Adjustment = Measured Calibration Temperature – Displayed
Temperature
Caution! - The procedure to determine the calibration temperature at the centre of a
chamber is not covered in these instructions. If you are unsure how to do this safely, then
seek advice as there is a risk of electric shock if done incorrectly.
Measured
Calibration
temp (°C)
Displayed
temp (°C) Old Offset Value (°C) New Offset Adjustment
New
Offset
Value (°C)
252 250 0 2 2
248 250 0 -2 -2
252 250 2 2 4

Customer Calibration
16 MC16-EN – 1.04
8.2.1 Changing the Single Point Calibration Offset OFSt
Starting from CL.St after C.CL1 has been selected.
Press the Page key until OFSt shows on the display.
Press the Up or Down arrow key to display the current calibration offset.
Press the Up or Down arrow key to change the offset value.
The value will then be stored without any further input.
Once the C.CL1 has been selected as the customer calibration type, it is possible to start
from the Home display and go to OFS.t directly and enter the password at this point when
the calibration adjustment is required again.
8.3 Dual Point Calibration - C.CL2
Dual point calibration uses two offset values at two corresponding temperatures to
progressively change the calibration as the temperature increases or decreases. This is a
more accurate representation of how the temperature difference will occur.
Caution! - Do not make CAL.L and CAL.H the same value as the controller will not work
correctly and could cause your furnace or oven to overheat.
8.4 Changing the Calibration, Low Temperature – CAL.L
Starting from CL.St after C.CL2 has been selected.
Press the Page key until CAL.L shows on the display.
Press the Up or Down arrow key to display the current calibration low temperature.
Press the Up or Down arrow key to change the temperature value.
The value will then be stored without any further input.
Once C.CL2 has been selected as the customer calibration type, it is possible to start from
the Home display and go to CAL.L directly (or any of the other settings in C.CL2) and enter
the password at this point when calibration adjustment is required again.
CL.St OFSt
Hold
If starting from Home Display If password required
CL.St CAL.L
Hold
If starting from Home Display If password required

Customer Calibration
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MC16-EN– 1.04
8.5 Changing the Calibration, Low Temperature Offset - OFS.L
OFS.L follows on from CAL.L when the Page key is pressed.
Press the Up or Down arrow key to display the current calibration low offset.
Press the Up or Down arrow key to alter the low offset value.
The value will then be stored without any further input.
8.6 Changing the Calibration, High Temperature – CAL.H
CAL.H follows on from OFS.L when the Page key is pressed.
Press the Up or Down arrow key to display the current calibration high temperature.
Press the Up or Down arrow key to change the temperature value.
The value will then be stored without any further input.
8.7 Changing the Calibration, High Temperature Offset - OFS.H
OFS.H follows on from CAL.H when the Page key is pressed.
Press the Up or Down arrow key to display the current calibration high offset.
Press the Up or Down arrow key to alter the high offset value.
The value will then be stored without any further input.
OFS.L CAL.H
Hold
If starting from Home Display If password required
CAL.L OFS.L
Hold
If starting from Home Display If password required
CAL.H OFS.H
Hold
If starting from Home Display If password required

Overtemperature Protection
18 MC16-EN – 1.04
9 Overtemperature protection
Overtemperature protection is an option on the 301 controller. An independent control
circuit and temperature sensor provide the over temperature protection.
There are two reasons for overtemperature protection:
1. To prevent the material being used in a furnace or oven from over-heating.
2. To give an extra safety system to prevent the furnace or oven from heating in the event
of a fault.
9.1 Overtemperature (O/T) Home Display
When the Overtemperature key is pressed and held the O/T Home display is shown.
The Home display shows what the overtemperature limit value is.
9.1.1 Finding the O/T Home Display from the O/T Home Menu
Press and hold the Overtemperature Key.
Press the Page key until the O/T limit value shows on the display
9.1.2 Finding the O/T Home Display from the O/T Setup Menu
Press and hold the Overtemperature key
Press and hold the Page key for 1.5 seconds.
Hold
Hold
Hold
301

Overtemperature Protection
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MC16-EN– 1.04
9.2 Changing the Overtemperature Limit
Note: If protection of the sample being processed is required, the overtemperature limit is
normally set 15oC above the temperature setpoint of the controller. If protection of the
furnace or oven is required, the overtemperature limit is normally set 15oC above the
maximum setpoint of the furnace or oven.
Start at the Home display.
Press and hold the Overtemperature key.
Press the Page key until OT shows on the display.
Use the Up and Down arrow keys to change the offset value– a single press shows the
current setting. To alter either keep pressed or press again.
The value will then be stored without any further input.
9.3 Checking the Overtemperature sensor temperature
Starting at the Home display.
Press and hold the Overtemperature key.
Press and hold the Page key for 1.5 sec.
PV is displayed for 1 second, followed by the overtemperature sensor value for 3 seconds;
this sequence is then repeated.
9.4 Overtemperature Protection Calibration
The overtemperature protection circuit can be calibrated in the same way as can the main
controller. However, this is not normally necessary as the level of accuracy required for
overtemperature protection is not as critical as it is for the main control temperature.
Starting at the Home display.
Press and hold the Overtemperature key.
Press and hold the Page key for 1.5 sec.
Press the Page key until CL.St is displayed.
Now follow the procedure in section 8
Hold
Ot
Hold
pV
Hold
Hold
CL.St
Hold

Overtemperature Protection
20 MC16-EN – 1.04
9.5 Overtemperature Activation
When an overtemperature circuit is fitted and is operating, the overtemperature indicator is
green. When the temperature of the furnace or oven goes above the overtemperature limit,
the overtemperature circuit activates. The power supply to the heating elements is cut and
the overtemperature indicator changes to flashing red.
Pressing the Overtemperature key shows Ott in the display to say that the overtemperature
has been triggered.
The reason for the overtemperature activation should then be investigated; an incorrect
setting in the overtemperature limit is often the cause. When you are satisfied with the
reason for the overtemperature activation it can be reset.
9.6 Resetting Overtemperature Activation
Starting at the Home display press and hold the Overtemperature key; Ott is displayed.
Press the Page key; Ot is displayed and the red indicator stops flashing.
Press the Up or Down arrow key to check the overtemperature limit value.
Press the Up or Down arrow key to alter the value if necessary.
Press the Page key to return to the overtemperature home display.
The overtemperature has now been reset
When the temperature falls below the overtemperature limit, the indicator changes back to
green.
When the PV falls below the temperature setpoint, the furnace/oven starts to heat again.
10 RS232 Communication
The 301 controller can be supplied with the capability to communicate with other devices via
an RS232 link. If this option has been ordered, the furnace or oven will be supplied with a 9
pin ‘D’ socket for connecting to an external device. Plugging this into a computer will allow
the controller to be accessed from that computer. The computer must have appropriate
communication software installed such as Eurotherm’s ‘i-Tools’
10.1 RS232 Communication Addressing:
Modbus Address (Main) = 2
Modbus Address (O/Temp)= 3
Baud Rate = 9600
Byte Format = 8
Hold
Ot