Burkert 8625-2 User manual

Operating Instructions
Bedienungsanleitung
Manuel d‘utilisation
Type 8625-2
Standard
Compact Temperature Controller
Kompakter Temperaturregler
Régulateur compact de température

We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.
© Bürkert Werke GmbH & Co. KG, 200 - 2017
Operating Instructions 1706/_EU-EN_008 / Original DE

8625-2 Standard - 1
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1 GENERAL NOTES ................................................................................................................ 3
1.1 Symbols..................................................................................................................................................... 3
1.2 Safety notes .......................................................................................................................................... 3
1.3 Protection from damage by electrostatic charging .......................................... 4
2 FUNCTION ....................................................................................................................................... 5
3 APPLICATION AREA ....................................................................................................... 6
4 TECHNICAL DATA................................................................................................................ 7
5 COMMISSIONING.................................................................................................................. 8
5.1 Connection to the proportional valve............................................................................. 8
5.2 Changing the cable outlet direction ................................................................................. 9
5.3 Connection configuration on the temperature controller
type 8625-2 .......................................................................................................................................... 10
5.4 First commissioning.................................................................................................................... 12
6 OPERATING THE TEMPERATURE CONTROLLER
TYPE ...................................................................................................................................................... 13
6.1 Operating modes ............................................................................................................................ 13
6.2 Indications on the display ..................................................................................................... 14
6.3 Key allocation .................................................................................................................................... 15
6.4 Standard mode ................................................................................................................................. 16
6.4.1 Standard mode and internal setpoint............................................................. 16
6.4.2 Standard mode and external setpoint ........................................................... 17
6.5 Manual mode ..................................................................................................................................... 18
6.6 Configuration mode ...................................................................................................................... 19
6.6.1 Menu of configuration mode ................................................................................. 21
6.6.2 UNIT - setting of unit of temperature ............................................................... 22
CONTENTS

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6.6.3 MODE - setting of setpoint mode ....................................................................... 23
6.6.4
AMPL - setting of amplification Kp............................................................................... 25
6.6.5 INTG - setting of reset time TN.......................................................................................... 26
6.6.6 INV - heating (non-inverted control)/cooling
(inverted control) ............................................................................................... 31
6.6.7 ZERO - zero point switch-off .................................................................................. 32
6.6.8
VALV - adaptation of controller output signal ........................................... 33
6.6.9 END - storage of the values ................................................................................... 35
6.7 Settings on delivery .................................................................................................................... 36
7 ERROR MESSAGES....................................................................................................... 37

8625-2 Standard - 3
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1 GENERAL NOTES
Please observe the notes in these operating instructions together with the
conditions of use and permitted data that are specified in the data sheets of the
proportional valve used and of the controller type 8625-2, in order that the
device will function perfectly and remain operable for a long time:
• Keep to standard engineering rules in planning the use of and operating the
device!
• Interference with the device is only allowed by specialist personnel using
suitable tools!
• Observe the current regulations on accident prevention and safety for
electrical devices during operation, maintenance and repair of the device!
• Before interfering with the system, always switch off the voltage!
• Take suitable precautions to prevent unintended operation or damage by
unauthorized action!
• On non-observance of this note and unauthorized interference with the
device, we will refuse all liability and the guarantee on device and
accessories will become void!
1.1 Symbols
The following symbols are used in these operating instructions:
marks a work step that you must carry out.
ATTENTION! marks notes on whose non-observance your health or the
functioning of the device will be endangered.
NOTE marks important additional information, tips and
recommendations.
1.2 Safety notes

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1.3 Protection from damage by electrostatic charging
ATTENTION
EXERCISE CAUTION ON HAND-
LING !
ELECTROSTATICALLY
SENSITIVE
COMPONENTS/MODULES
This device contains electronic components that are sensitive to electrostatic
discharge (ESD). Contact to electrostatically charged persons or objects will
endanger these components. In the worst case, they will be immediately
destroyed or will fail after commissioning.
Observe the requirements of EN 100 015 - 1 in order to minimize the
possibility of, or avoid, damage from instantaneous electrostatic discharge.
Also take care not to touch components that are under supply voltage.

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2 FUNCTIONS
The temperature controller type 8625-2 is designed, in connection with a pro-
portional valve and a temperature sensor, to keep the temperature in a flowing
medium constant or to follow a given setpoint profile.
The functionality of the device is characterized by:
• Compact design, capable of direct installation on the proportional valve.
• May be combined with valve types 6022, 6023, 6024, 6223, 2832, 2834.
• Controller ouput directly to proportional valve in the form of a PWM signal;
this minimizes hysteresis and optimizes the control performance.
• Connection of PT100 sensor of any type to the actual value input (e.g.
types ST20 - 24).
• The standard signal input can be scaled to the control range actually
required (standard model only).
• Setting of setpoint value via standard 4 - 20 mA or 0 - 10 V signal, keypad
or bus.
• Digital control with a PI control algorithm and settable control parameters.
• Applications in heating and cooling possible.
• Display of setpoint or actual values (to choice) on an LCD display.
• Configuration with three keys.
For measured variables such as pressure, flow rate, conductivity,etc. we offer
suitable controllers, e.g:
• Type 8623-2 for flow rate control with frequency input for the sensor
• Type 8624-2 for pressure, flow rate, conductivity,etc. with standard
signal input for connection of a transmitter.

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3 APPLICATION AREA
The compact temperature controller type 8625-2 is used in the area of mixing
temperature control.
Setpoint
cold hot
Proportional valve
Temperature sensor PT 100
Medium with controlled temperature
Fig.: Structure of a temperature control system with the compact temperature
controller type 86235-2 (schematic)
Actual value (PT100)
Controller type 8625-2

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Operating voltage 24 V DC
Power consumption max. 0.3 W (without proportional valve)
Output current (to valve) max. 1.0 A
Operating temperature - 10 °C ... + 60 °C / 14 °F ... 140 °F
Interference resistance to EN50082-2
Interference emission to EN50081-2
Inputs
Sensor input PT100
temperatur range - 50 °C ... 150 °C / - 58 °F ... 302 °F
resolution 0.25 °C or 0.45 °F 1)
precision 1.5 °C bzw 2.7 °F 1)
1 standard signal input 4 - 20 mA / 0 - 10 V, adjustable
resolution 10 Bit
input impedance (4 - 20 mA) < 200 Ω
input impedance (0 - 10 V) > 300 kΩ
Output
PWM output 24 V - pulse width modulated
Controller
Control algorithm PI control
Scan time TA50 ms
Amplification factor Kp0,00 - 10,00 %/K
Reset time TN0,1 - 200,1 s
Scaling -50 °C ... 150 °C or -58 °F ... 302 °F
Housing
Cable outlet rotatable in 90° steps
System of protection IP 65
Material polyamide
Dimensions (WxHxD) 54 x 54 x 61 mm
Order no. 143 571
1) Calibrated to 1 m conductor length and 0.5 mm² conductor cross-section.
4 TECHNISCHE DATEN

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5 COMMISSIONING
NOTE Interference with the device is only allowed by specialist
personnel using suitable tools!
Before interfering with the temperature controller, always
switch off the voltage!
On screwing the temperature controller onto the proportional
valve, make sure the seal is correctly seated!
ÎUnscrew the 4 screws on the front panel of the temperature controller and
remove the cover carefully.
ÎPlace the housing of the temperature controller with the seal onto the valve.
ÎScrew the temperature controller tightly to the valve.
5.1 Connecting to the proportional valve
ÎPlace the conver on the temperature controller and screw it tight with the 4
screws
Fig.: Connecting the temperature controller to the proportional valve
ATTENTION! Make sure the cover is placed on the right way round
(pinned strips must engage in the sockets).
ATTENTION!