Quick-Ohm QC-PC-PID-01 User manual

QC-PC-PID-01
Peltier-Controller
Manual

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Table of contents:
Technical specifications........................................................................................................................... 3
Intended use and description of the controller ...................................................................................... 3
Correct polarity of the Peltier element................................................................................................... 4
The thermal design.................................................................................................................................. 5
Before switching on................................................................................................................................. 6
The user interface (Menu)....................................................................................................................... 7
MONITOR-menu.................................................................................................................................. 8
SETPOINT-MENU ............................................................................................................................... 10
PASSWORD-MENU ............................................................................................................................ 11
CHANGE PASSWORD-MENU ............................................................................................................. 12
Safety query ...................................................................................................................................... 13
PARAMETER-MENU........................................................................................................................... 14
PA SET MENU .................................................................................................................................... 16
Software Version............................................................................................................................... 17
Controller connection ........................................................................................................................... 18
Before start-up ...................................................................................................................................... 19
First commissioning step by step .......................................................................................................... 20
Switch off current flow...................................................................................................................... 20
Parameter settings ............................................................................................................................ 20
Determine and set PM ...................................................................................................................... 21
Start temperature control................................................................................................................. 22
Adjustment of control parameters.................................................................................................... 23
General remarks on the control parameters KP, TN and TV................................................................. 24
Parameterization according to Ziegler & Nichols.................................................................................. 25
Summary of commissioning .................................................................................................................. 26
Reset controller to factory setting ........................................................................................................ 27
Drawing: ................................................................................................................................................ 28
Peltier controller ............................................................................................................................... 28
PT1000-Sensor................................................................................................................................... 29

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Quick-Ohm Küpper & Co. GmbH
Cronenfelder Straße 75
42349 Wuppertal
Germany
www.quick-ohm.de
www.quick-cool.de

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Technical specifications
Control range: -50°C to +150°C
Temperature measurement range: -60°C to +170°C
Sensitivity: 0,06 Kelvin
Accuracy: ± 1 Kelvin
Voltage supply: Vsupply = 12VDC –24VDC
Maximum output current: 8A
Maximum output voltage: approx. 95% Vsupply
Measurement cycle: approx. 3 measurements / second
Sensor type: PT1000
Additional output signal: 0 –10VDC / max. 80mA
„Open-Collector“ output: Imax 100mA / Emitter on ground
Intended use and description of the controller
The QC-PC-PID-01 is used for controlling temperature.
The controller detects the temperature via a PT1000 sensor (deliverables) and
controls a peltier element with a continuously regulated DC voltage.
The control can optionally be set to a P, PI, PD or PID modes.
The controller is operated and set using the integrated touchscreen. The user interface is embedded
in a menu structure. The controller may only be used up to a maximum current of 8A.

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Correct polarity of the Peltier element
In order for the controller to work, it is important to connect the Peltier element correctly. If the
Polarity of Peltier element is incorrect, uncontrollable high or low temperatures will occur during
operation.
Quick Ohm Peltier elements have their electrical
connections on the passive side (also called "hot
side") of the Peltier element. If the connecting
wires face towards the user with the red wire to the
right, the active side (also called "cold side") is at
the top. Quick-Ohm peltier elements have their
imprint on the “cold side”. The object to be
tempered must be thermally coupled to the cold
side. The other side must be thermally coupled to a
heat sink. If a voltage is applied to the connections, the cold side becomes cold when the voltage on
the red line is electrically positive compared to the voltage on the black line. For modules other than
Quick Ohm peltier elements, it is recommended to check the polarity. Depending on their
description, these modules might have to be connected the other way round.
Caution: A Peltier element may only be supplied with electricity if it is in thermal contact with a
sufficiently large heat sink, where heat can be dissipated. Areas that remain free and thus have no
possibility to dissipate thermal power can overheat in a few seconds.

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The thermal design
The Peltier element must be contacted on the entire surface on both sides. The cold side is contacted
with the object to be tempered. The object must accommodate the PT1000 sensor. For this purpose,
a hole of Ø3.1mm must be drilled in the body to be tempered. Ideally, this hole should be at least
30mm deep. The temperature is recorded via this sensor. The "hot side" must contact a heat sink
over the entire surface, The heat sink must be able to dissipate the thermal energy without the “hot
side” heating up excessively. The complete structure has to look like in the picture below. It is
irrelevant whether you are cooling with air or another medium.
The surfaces that are contacted with the Peltier element must have good flatness ≤ 0,02mm. For a
good thermal connection, the contact surfaces should also be filled with thermal conductive paste,
thermal oil or thermal conductive foil.
You can find information about the use of Peltier elements in our library on our homepage.

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Before switching on
Before switching on, the contents of these operating instructions must be carefully studied and
understood.
The controller may only be connected to a professional installed system.
Before switching on, make sure that the maximum permissible current of 8 amperes cannot be
exceeded. The data sheet of the Peltier element must be consulted for this.
Please read these instructions carefully. The menu is explained below. This is followed by a
description of a step-by-step start-up.

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The user interface (Menu)
After applying the supply voltage, the monitor menu is displayed on the touchscreen. All important
values and various states of the controlling are visualized here. From here you can access the
individual submenus.

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MONITOR-menu
The MONITOR-menu controls the process.
The MONITOR-menu shows all important values for controlling the control process.
Function Keys:
jumps to the software version menu
jumps to the SETPOINT-MENU
jumps into the PARAMETER-MENU with password protection
switches off peltier supply resp. switches on the peltier supply
Display fields:
T-BOARD shows the temperature of the electronics. The controller has a fan that continuously drives
air through the housing. This cools the electronic components. With sufficient cooling, the board
temperature is highlighted in green. If the colour changes to yellow, the cooling is insufficient. Check
if the fan is running. Check also the load current and the free air supply. If the board temperature
exceeds a critical value, the colour changes to red and the control switches off. The controller can
only be restarted when the board temperature has returned to the green area.
TARGET TEMPE shows the target value for the temperature
PM shows the maximum output voltage as a percentage of the supply voltage
ACTUAL TEMPERATURE shows the temperature currently measured on the sensor
TEC-CUR shows the current flow through the connected element
TEC-VOLT shows the current voltage at the output
TEC-POW shows the electrical power that is supplied to the connected element
(TEC-POW = TEC-VOLT X TEC-CUR)
Display Function:
Indicates power
supply to the
consumer is OFF
Key Function:
Tap to Turn ON the
power supply to the
consumer
Display Function:
Indicates power
supply to the
consumer is ON
Key Function:
Tap to Turn OFF the
power supply to the
consumer
Dual function:
Operation indicator light & Switch ON/OFF

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Bar display = Control value display (tacho)
The bar indicates the current status of the control system.
-up / red: Heating - Full deflection at maximum heating
-down / blue: Cooling - Full deflection at maximum cooling

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SETPOINT-MENU
The target temperature value is set in the SETPOINT-MENU. If necessary, the sensor can be
calibrated via the sensor offset.
Calibrating the temperature measurement:
In order to calibrate the temperature measurement of the
controller, the object temperature at the location of the
sensor must be measured with a sufficiently precise
thermometer and compare it with the ACT. TEMP. value on
the display of the controller.
The offset to be set is calculated from this as follows:
SENSOR OFFSET (CAL) = object temperature –ACT. TEMP.
The first digit of the TARGET TEMPERATURE flashes when the SETPOINT-MENU is entered. The
regulation is maintained with the previously selected target temperature. Changed values are only
accepted when you exit the setpoint menu.
increases the flashing digit
decreases the flashing digit
jumps one digit to the right or back to the first digit when the last digit is reached.
alternates between TARGET TEMPERATURE and SENSOR OFFSET (CAL)
jumps back to the MONITOR-menu [and changes the old - to the new values]
Key function: Switches OFF peltier element Display function: Output is ON
Key function: Switches ON peltier element Display function: Output is OFF
TARGET TEMPERATURE shows target temperature
SENSOR OFFSET (CAL) shows sensor offset
ACT. TEMP.Shows the actual temperature measured with the sensor
TEC-CUR shows the actual current through the peltier element

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PASSWORD-MENU
The PASSWORD-MENU protects the PARAMETER-MENU against unauthorized access.
You reach the PASSWORD-MENU, when you call up the PARAMETER-MENU.
The first digit flashes after entering the PASSWORD-MENU.
increases the flashing digit
decreases the flashing digit
jumps to the next digit
jumps into the PARAMETER-MENU (only if the correct password was
entered beforehand, otherwise the system jumps back to the monitor menu)
The password can be changed.
jumps into the CHANGE PASSWORD-MENU (only if the correct password
was entered beforehand, otherwise the system jumps back to the MONITOR-MENU)

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CHANGE PASSWORD-MENU
can only be reached after entering the currently valid password.
The first digit of the new password flashes, when the CHANGE PASSWORD-MENU is reached.
increases the flashing digit
decreases the flashing digit
jumps to the next digit
jumps to the Safety query
aborts the process and returns to the MONITOR-menu without changing
the password
Before the password can be overwritten, a safety query appears to prevent the password from being
changed accidentally.

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Safety query
The security query protects against unwanted password changes.
changes the password and jumps to the PARAMETER-MENU
The new password is set. The old password is no longer valid.
aborts the process and returns to the MONITOR-menu.
The old password remains unchanged.

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PARAMETER-MENU
The PARAMETER-MENU is password protected.
To access the PARAMETER-MENU, the password must be entered correctly and confirmed with
. If the password is incorrect, the system jumps back to the MONITOR-menu. In the delivery
state, the password is 0000.
The dynamic properties of the control are set in the PARAMETER-MENU and the output voltage for
the connected Peltier element is adjusted.
Attention: Parameter changes only become effective after pressing the touch-sensitive area (*
see figure below).
Two freely selectable temperatures can be set in the PARAMETER-MENU. The and
buttons change the target temperature to these values. Current, voltage, setpoint and actual value
are continuously displayed so that the control can continue to be monitored. The parameterization
can be evaluated based on the temperature and readjusted if necessary. These two jump buttons are
a useful aid when parameterizing the control loop. When you exit the PARAMETER-MENU, the
original setpoint of the temperature is accepted again.
In the PARAMETER-MENU, the controller can be adapted to the connected temperature control
system. The controller has a PID-regulation characteristic. When the PARAMETER-MENU is entered,
the currently set control status is retained. TAR-TEMP shows the set target temperature. When you
reach the PARAMETER-MENU, the first digit of the proportional gain KP flashes.
KP flashes
increases the flashing digit
decreases the flashing digit
jumps to the next digit
changes to the next line (from KP to PM and back to KP)
* Touch-sensitive area. Touch
here to make the parameter
change effective.

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KP Proportional part of the PID control
TN Integral part of the PID control 0 switches off the integral part
TV Differential component of the PID control 0 switches off the differential part
The controller can thus be set to pure P, PI, PD or PID control characteristic.
PM shows the set voltage limit as a percentage of the input voltage
T1 freely selectable temperature value 1
T2 freely selectable temperature value 2
changes the setpoint (TAR-TEMP) to the temperature value 1 T1
changes the setpoint (TAR-TEMP) to the temperature value 2 T2
ACT-TEMP (actual temperature) shows the actual temperature measured at the sensor
TAR-TEMP (target temperature) shows the set target temperature
TEC-CUR shows the current flow through the connected element
TEC-V shows the actual output-voltage
AUTO ON/OFF shows the status of the autostart function
switches the Autostart function ON or OFF.
In the autostart-ON mode, the controller starts immediately after the supply voltage is
switched on, if it was previously switched off with the output switched on.
In autostart-OFF mode, the controller always starts with the output switched off.
Key Function: Stop output Display Function: Output is ON.
Key Function: Starts output Display Function: Output is OFF.
jumps back to the MONITOR-menu
jumps to the PArameter SET MENU. The values KP, TN and TV can be stored here.

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PA SET MENU
The PA SET MENU offers the possibility to save intermediate parameter values during parameter
determination and to recall them if necessary. Save stable parameter sets here before you make
further optimizations.
The currently effective PID parameter set is displayed under ACTUAL PARA an. This parameter set
can be saved in one of the four parameter storage locations via . It is also possible to load one
of the stored parameter-sets into the current memory using . With you get back to the
PARAMETER-MENU.
Attention, only the control parameters KP, TN and TV are stored here. The PM value is not saved.
ACTUAL PARA shows the currently effective parameter set of the PID control
record 1 shows the PID parameter set in memory location 1
record 2 shows the PID parameter set in memory location 2
record 3 shows the PID parameter set in memory location 3
record 4 shows the PID parameter set in memory location 4
overwrites ACTUAL PARA with selected parameter RECORD 1/2/3/4
overwrites RECORD 1/2/3/4 with ACTUAL PARA
jumps back to PARAMETER-MENU. Now the last shown ACTUAL PARA is active.

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Software Version
Here you get the information about the software version.
Touching the centre of the display switches back to the MONITOR-menu.

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Controller connection
The electrical components of the control circuit are connected to the controller via a 10-pin plug with
screw contacts.
Contact
number:
Description
Function
Comments
1
+rd
PE
Peltier element connection
red wire
Attention:
Specifications apply to
Quick-Ohm modules. It
may differ for other
manufacturers. (See
also Correct polarity of
the Peltier element)
2
-bk
PE
Peltier element connection
Black wire
3
Vsupply
+
Connection positive voltage
supply 12 VDC –24 VDC
4
Vsupply
-
Connection GND potential
zero voltage supply
5
PT1000
Rth
Connection
PT1000 sensor
6
PT1000
GND
Connection
PT1000 sensor
7
0-10VDC
+
Output
Control signal → 0-10VDC
Experts only
Control output
Imax = 80mA
Vmax = PM x 10V
8
0-10VDC
GND
Output
Control signal → 0V / GND
9
Open col.
C
Output open collector
Collector connection
Experts only
Control output
Open-Collector
Emitter GND
Imax = 100mA
10
Open col.
GND
Output emitter / Potential
zero / GND

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Before start-up
The user is expected to control and master his thermal design. This instruction does not provide any
relevant training. The user must ensure that he has completely read and understood these operating
instructions beforehand. Furthermore, there must be a thermal design that is reasonably
dimensioned. The assembly must contact the object to be tempered on the entire "cold side" of the
Peltier element. The object to be tempered must have good thermal connection with PT1000 sensor.
On the other hand, the entire "hot side" must be connected to a sufficiently effective heat sink (heat
sink, heat exchanger). A Peltier element is considered to be sufficiently connected, if the “hot side”
heats up or cools down by a maximum of 10 K compared to its cooling medium. An insufficiently
cooled Peltier element will overheat during operation within a few seconds and consequently get
damaged. A poorly cooled Peltier element will not achieve the set goal.
You can find helpful information on our homepage under the heading Library.