.book Page 1 Monday, November 18, 2013 4:44 PM SMARTSENS PH 8570 Handbook Digital pH sensor for the food and beverage industries Electronic Revision: ER 3.3.x (SW.REV. 1.x.
.book Page 2 Monday, November 18, 2013 4:44 PM : IMPRINT ::::::::::::::::::::::::::::::::::::::: All rights reserved. It is prohibited to reproduce this documentation, or any part thereof, without the prior written authorisation of KROHNE Messtechnik GmbH. Subject to change without notice. Copyright 2013 by KROHNE Messtechnik GmbH - Ludwig-Krohne-Str. 5 - 47058 Duisburg (Germany) 2 www.krohne.
.book Page 3 Monday, November 18, 2013 4:44 PM CONTENTS SMARTSENS PH 8570 1 Safety instructions 5 1.1 Intended use ..................................................................................................................... 5 1.2 Safety instructions from the manufacturer ..................................................................... 5 1.2.1 1.2.2 1.2.3 1.2.4 1.2.5 Copyright and data protection .............................................................................................
.book Page 4 Monday, November 18, 2013 4:44 PM CONTENTS SMARTSENS PH 8570 6 Technical data 28 6.1 Measuring principle........................................................................................................ 28 6.1.1 pH measurement .................................................................................................................. 28 6.2 Technical data................................................................................................................. 30 6.
Safety instructions .book Page 5 Monday, November 18, 2013 4:44 PM SAFETY INSTRUCTIONS 1 SMARTSENS PH 8570 1.1 Intended use DANGER! For devices used in hazardous areas, additional safety notes apply; please refer to the Ex documentation. CAUTION! Responsibility for the use of the measuring devices with regard to suitability, intended use and corrosion resistance of the used materials against the measured fluid lies solely with the operator.
.book Page 6 Monday, November 18, 2013 4:44 PM 1 SAFETY INSTRUCTIONS SMARTSENS PH 8570 1.2.2 Disclaimer The manufacturer will not be liable for any damage of any kind by using its product, including, but not limited to direct, indirect or incidental and consequential damages. This disclaimer does not apply in case the manufacturer has acted on purpose or with gross negligence.
.book Page 7 Monday, November 18, 2013 4:44 PM SAFETY INSTRUCTIONS 1 SMARTSENS PH 8570 1.2.5 Warnings and symbols used Safety warnings are indicated by the following symbols. DANGER! This information refers to the immediate danger when working with electricity. DANGER! This warning refers to the immediate danger of burns caused by heat or hot surfaces. DANGER! This warning refers to the immediate danger when using this device in a hazardous atmosphere.
Device description .book Page 8 Monday, November 18, 2013 4:44 PM 2 DEVICE DESCRIPTION SMARTSENS PH 8570 2.1 Scope of delivery INFORMATION! Inspect the cartons carefully for damages or signs of rough handling. Report damage to the carrier and to the local office of the manufacturer. INFORMATION! Do a check of the packing list to make sure that you have all the elements given in the order. INFORMATION! Look at the device nameplate to ensure that the device is delivered according to your order.
.book Page 9 Monday, November 18, 2013 4:44 PM DEVICE DESCRIPTION 2 SMARTSENS PH 8570 2.2 Device description 2.2.1 pH sensor Figure 2-2: Construction of the sensor 1 Nickel plated brass body with VP 2.0 connector or PEEK body with VP 2.0 connector (in preparation) 2 PG 13.5 thread 3 Washer 4 O-ring 5 Glass shaft 6 Diaphragm 7 Membrane glass 11/2013 - 4002544902 - MA SMARTSENS PH 8570 R02 en www.krohne.
.book Page 10 Monday, November 18, 2013 4:44 PM 2 DEVICE DESCRIPTION SMARTSENS PH 8570 2.3 Nameplate Figure 2-3: Example for a nameplate on the sensor body 1 2 3 4 5 6 Manufacturer Device name Order code Serial number Approvals Observe the operation and installation instruction Figure 2-4: Example for a nameplate on the glass shaft 1 Manufacturer 2 Device name INFORMATION! Look at the device nameplate to ensure that the device is delivered according to your order.
Installation .book Page 11 Monday, November 18, 2013 4:44 PM INSTALLATION 3 SMARTSENS PH 8570 3.1 General notes on installation DANGER! For devices used in hazardous areas, additional safety notes apply; please refer to the Ex documentation. DANGER! All work on the electrical connections may only be carried out with the power disconnected.
.book Page 12 Monday, November 18, 2013 4:44 PM 3 INSTALLATION SMARTSENS PH 8570 3.3 Installation procedure WARNING! During installation of the device make sure that you use ESD (electronic discharge) protection equippment. Because a new pH sensor needs to be calibrated before it is installed into its final measuring location, it is important to follow the installation order: 1 2 3 4 Unpack the sensor. Connect the sensor to the junction box or directly to the process control system.
.book Page 13 Monday, November 18, 2013 4:44 PM INSTALLATION 3 SMARTSENS PH 8570 3.5 Electrical connection DANGER! For devices used in hazardous areas, additional safety notes apply; please refer to the Ex documentation. DANGER! All work on the electrical connections may only be carried out with the power disconnected. DANGER! Observe the national regulations for electrical installations! WARNING! Observe without fail the local occupational health and safety regulations.
.book Page 14 Monday, November 18, 2013 4:44 PM 3 INSTALLATION SMARTSENS PH 8570 3.5.2 Connecting the sensor cable DANGER! All work on the electrical connections may only be carried out with the power disconnected. INFORMATION! Look at the device nameplate to ensure that the device is delivered according to your order. SMARTSENS cable VP 2.0 Black (inner coax shield) Ub+ White Ub- 3.5.
.book Page 15 Monday, November 18, 2013 4:44 PM INSTALLATION 3 SMARTSENS PH 8570 Figure 3-4: SJB 200 W and SD 200 W/R (left side). SJB 200 W for HART® communication and with resistance R (right side).
.book Page 16 Monday, November 18, 2013 4:44 PM 3 INSTALLATION SMARTSENS PH 8570 3.6 Installing the sensor 3.6.1 General installation instructions The membrane glass must always have full contact with the measuring medium. The mounting position of the sensor should not deviate more than 75° from vertical position (sensor tip pointing downwards). Doing otherwise might cause internal air bubbles to float into the membrane glass.
Operation .book Page 17 Monday, November 18, 2013 4:44 PM OPERATION 4 SMARTSENS PH 8570 4.1 Calibration 4.1.1 Calibration with PACTwareTM Manual hold • • • • Start the function calibration in menu mode Quick Setup or Setup. Setup Activate the function manual hold to avoid an alarm. Select yes. yes Press Next to proceed. Temperature compensation • Set the temperature compensation for calibration. • Select between automatic or manual.
.book Page 18 Monday, November 18, 2013 4:44 PM 4 OPERATION SMARTSENS PH 8570 • Dip the sensor into the second pH buffer solution 3 and wait till the value ist stable. • Press Next to proceed. i The measurement of pH buffer solution 2 starts and the values pH and temperature appear. After approx. 10 seconds the following values appear: pH value temperature value Indentified buffer value • Press Next to confirm the identified pH buffer solution.
.book Page 19 Monday, November 18, 2013 4:44 PM OPERATION 4 SMARTSENS PH 8570 • Press Next to proceed. • Select no to deactivate the function manual hold hold. • Press Next to leave the calibration menu. In a fully functional sensor, the optimal slope is -59 mV for each pH unit and the optimal zero point is 0 mV at pH 7. The slope should at least have a value between -50...-65 mV per pH unit. Re-calibrate the sensor if the slope does not approximate those limits.
.book Page 20 Monday, November 18, 2013 4:44 PM 4 OPERATION SMARTSENS PH 8570 • Press Enter to proceed with the calibration procedure. • Clean the sensor with demineralised water 2. Figure 4-2: Calibration procedure • Dip the sensor into the second pH buffer solution 3 and wait till the value is stable. • Press Ok to proceed. i The measurement of pH buffer solution 2 starts and the values pH and temperature appear. After approx.
.book Page 21 Monday, November 18, 2013 4:44 PM OPERATION 4 SMARTSENS PH 8570 • Select no to deactivate the function manual hold hold. • Press Enter to leave the calibration menu. A pH calibration is necessary in regular intervals or when installing a new pH sensor. If the calibration was not successful, the message Warning! appears behind the values Offset and/or Slope. Slope • Press Ok to proceed. • Set the calibration date with MM-DD-YYYY. Press the key > to enter the submenu.
.book Page 22 Monday, November 18, 2013 4:44 PM 4 OPERATION SMARTSENS PH 8570 4.2 Troubleshooting Problem Possible cause Remedy The pH sensor does not deliver a signal. Mechanical damage of the glass, e.g. small cracks. This will shortcut the ion exchange and deliver a pH 7 reading. Exchange sensor. Open circuit Check the cable wiring of the sensor cable on the junction box. Otherwise connect the sensor to the primary master e.g.
.book Page 23 Monday, November 18, 2013 4:44 PM OPERATION 4 SMARTSENS PH 8570 4.3 Status messages and diagnostic information Measurements out of specification Message Description Action S01 pH value > pH max pH value out of range S02 pH value < pH min pH value out of range Consider the measuring range limits, otherwise select a suitable sensor for the process conditions of the application. S03 Temp. value > Temp max Temperature value out of range S04 Temp.
Service .book Page 24 Monday, November 18, 2013 4:44 PM 5 SERVICE SMARTSENS PH 8570 5.1 Maintenance 5.1.1 Cleaning INFORMATION! Recalibrate the sensor after each cleaning procedure • Slight dirt residues or dust: Rinse the sensor tip with demineralised water and clean it with a soft tissue. • Oily and greasy coatings: Remove with a warm soap solution and rinse with demineralised water.
.book Page 25 Monday, November 18, 2013 4:44 PM SERVICE 5 SMARTSENS PH 8570 Figure 5-1: Aging effects of sensor 1 Horizontal shift of slope 2 Vertical shift of slope 3 Decrease of slope INFORMATION! The lifetime expectation depends heavily on the application. The right choice of the sensor type is very important. 5.2 Availability of services The manufacturer offers a range of services to support the customer after expiration of the warranty.
.book Page 26 Monday, November 18, 2013 4:44 PM 5 SERVICE SMARTSENS PH 8570 5.3 Returning the device to the manufacturer 5.3.1 General information This device has been carefully manufactured and tested. If installed and operated in accordance with these operating instructions, it will rarely present any problems.
.book Page 27 Monday, November 18, 2013 4:44 PM SERVICE 5 SMARTSENS PH 8570 5.3.2 Form (for copying) to accompany a returned device Company: Address: Department: Name: Tel. no.: Fax no.: Manufacturer's order no. or serial no.: The device has been operated with the following medium: This medium is: water-hazardous toxic caustic flammable We checked that all cavities in the device are free from such substances. We have flushed out and neutralized all cavities in the device.
Technical data .book Page 28 Monday, November 18, 2013 4:44 PM 6 TECHNICAL DATA SMARTSENS PH 8570 6.1 Measuring principle 6.1.
.book Page 29 Monday, November 18, 2013 4:44 PM TECHNICAL DATA 6 SMARTSENS PH 8570 The voltage change of a pH sensor at 25°C / 77°F is around -59 mV for each pH unit. This is also called the slope of the pH sensor. The slope is temperature dependent and decreases over life time of the sensor. Figure 6-2: Optimal slope at 25°C / 77°F To compensate for the temperature dependency of the pH measurement, the temperature of the medium can be measured and automatically compensated.
.book Page 30 Monday, November 18, 2013 4:44 PM 6 TECHNICAL DATA SMARTSENS PH 8570 6.2 Technical data INFORMATION! • The following data is provided for general applications. If you require data that is more relevant to your specific application, please contact us or your local sales office. • Additional information (certificates, special tools, software,...) and complete product documentation can be downloaded free of charge from the website (Download Center).
.book Page 31 Monday, November 18, 2013 4:44 PM TECHNICAL DATA 6 SMARTSENS PH 8570 Communication pH range 0...14 pH Resolution pH range 0.02 pH Output signal 4...20 mA (passive) Output resolution 20 µA Field communication HART® 7 - FSK 1200 physical layer definition on top of the current loop Filter adjustable 1...60 seconds Electrical connections Power supply 15...30 VDC loop powered Measuring range 4...20 mA + HART® protocol Load Minimum 0 Ω; maximum RL = ((Uext.
.book Page 32 Monday, November 18, 2013 4:44 PM 6 TECHNICAL DATA SMARTSENS PH 8570 6.3 Dimensions Figure 6-4: SMARTSENS PH 8570 with VP 2.0 Dimensions [mm] 32 Dimensions [inch] a 104 4.09 b 120 / 225 4.72 / 8.86 c 12 0.47 d Ø 12 Ø 0.47 www.krohne.
Description of HART interface .book Page 33 Monday, November 18, 2013 4:44 PM DESCRIPTION OF HART INTERFACE 7 SMARTSENS PH 8570 7.1 General description The open HART® protocol, which can be used for free, is integrated into the sensor for communication. Devices which support the HART® protocol are classified as either operating devices or field devices.
.book Page 34 Monday, November 18, 2013 4:44 PM 7 DESCRIPTION OF HART INTERFACE SMARTSENS PH 8570 7.3 Connection variants The sensor is a 2-wire device with a passive 4...20 mA current output and HART® interface. • Multidrop mode is supported In a multidrop communication system, more than 2 devices are connected to a common transmission cable. • Burst mode is not supported In the burst mode a slave device transfers cyclic pre-defined response telegrams, to get a higher rate of data transfer.
.book Page 35 Monday, November 18, 2013 4:44 PM SMARTSENS PH 8570 DESCRIPTION OF HART INTERFACE 7 7.3.1 Point-to-Point connection - analogue / digital mode Point-to-Point connection between the sensor and the HART® Master. The current output of the device is passive. Figure 7-1: Point- to-Point connection 1 Primary master with e.g.
.book Page 36 Monday, November 18, 2013 4:44 PM 7 DESCRIPTION OF HART INTERFACE SMARTSENS PH 8570 7.
.book Page 37 Monday, November 18, 2013 4:44 PM SMARTSENS PH 8570 DESCRIPTION OF HART INTERFACE 7 7.5.2 Operation INFORMATION! For more detailed information (see on page 38), Menu tree for Basic DD. Operating the sensor via the Field Communicator is very similar to manual device control using the keyboard. Limitation: The service menu parameters for the senor are supported but a simulation for the current output is not possible.
.book Page 38 Monday, November 18, 2013 4:44 PM 7 DESCRIPTION OF HART INTERFACE SMARTSENS PH 8570 7.
.book Page 39 Monday, November 18, 2013 4:44 PM DESCRIPTION OF HART INTERFACE 7 SMARTSENS PH 8570 7.8 Basic-DD menu tree (details for settings) 1 Measuring value 1 pH value Display of the measured pH value on process control system, HART® handheld or display. 2 Temperature Display of the measured temperature value in °C / °F on process control system, HART® handheld or display. 3 Electrode voltage Display of the measured electrode voltage in mV on process control system, HART® handheld or display.
.book Page 40 Monday, November 18, 2013 4:44 PM 7 DESCRIPTION OF HART INTERFACE SMARTSENS PH 8570 4 Setup 1 Process input Temperature Set temperature unit °C / °F Set temperature offset Display date of offset calibration Set temperature compensation (automatic/manual); Default setting: automatic Set temperature value 5...50°C/41...122°F (only if manual temperature compensation is activated; Default setting: 25°C/77°F ) 2 I/O 3 I/O HART Calibration Start calibration procedure.
.book Page 41 Monday, November 18, 2013 4:44 PM DESCRIPTION OF HART INTERFACE 7 SMARTSENS PH 8570 4 Device Information Sensor information Order code Device name Serial number HART® ID Polling address Manufacturer ID Date of manufacturing SW version HW version Calibration Slope Offset Inner buffer Buffer solution 1 Buffer solution 2 No.
Appendix .book Page 42 Monday, November 18, 2013 4:44 PM 8 APPENDIX SMARTSENS PH 8570 8.1 pH as a function of mV The pH-value is the negative decadative logarithm of the hydrogen ion concentration, and it is directly related to the proportion of hydrogen ions H+ to hydroxide ions OH- in the media. The pHsensor measures excess or deficit of the hydrogen ions and gives a proportional millivolt signal as output. The signal is 59.16 mV per 1 pH at 25°C / 77°F.
.book Page 43 Monday, November 18, 2013 4:44 PM APPENDIX 8 SMARTSENS PH 8570 8.2 pH temperature dependency The output from a pH sensor varies with the temperature in a predictable way. The size of the variation depends on both the temperature and the pH being measured. °C °F pH pH pH pH pH pH pH pH pH pH pH pH 5 41 2.30 3.24 4.18 5.12 6.06 7.00 8.06 9.12 10.18 11.24 12.30 13.36 15 59 2.15 3.12 4.09 5.06 6.03 7.00 8.03 9.06 10.09 11.12 12.15 13.18 25 77 2.
.book Page 44 Monday, November 18, 2013 4:44 PM © KROHNE 11/2013 - 4002544902 - MA SMARTSENS PH 8570 R02 en - Subject to change without notice.
