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Summary of Contents for PCE Instruments PCE-MWM 2 Series
- Page 1 Manual Moisture Sensor PCE-MWM 2xx User manuals various languages (français, italiano, español, português, nederlands, türk, polski, русский, 中文) can be downloaded here: www.pce-instruments.com Last change: 27 March 2018 v1.41...
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Page 2: Table Of Contents
Manual Table of Contents Introduction ........................5 Safety notes ........................5 Scope of delivery ......................5 Specifications ........................6 Mechanical installation ....................7 PCE-MWM 210 ......................7 5.1.1 Flange ......................8 5.1.2 Installation ..................... 9 5.1.3 Sensor Coverage ..................10 PCE-MWM 240A .................... - Page 3 Manual Transfer calibration to / from electronic unit ..........38 Export / import calibration in .csv-file ............40 Select calibration in electronic unit ............... 40 Establish / close connection ..............40 7.10 Test ......................40 7.11 Settings ......................40 7.12 Configuration electronic unit .................
- Page 4 Manual Table of figures Fig. 1 Installation of PCE-MWM 210 ..........................7 Fig. 2 Welding flange ................................ 8 Fig. 3 Clamping ring ................................8 Fig. 4 Sensor fixed in ring-assembly ..........................9 Fig. 5 Ring-assembly ................................ 9 Fig. 6 Distance of PCE-MWM 210 to metallic components .................... 10 Fig.
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Page 5: Introduction
Please read this manual carefully and completely before you attempt to use the device for the first time. The device may only be used by qualified personnel and repaired by PCE Instruments personnel. Damages or injuries caused by non-observance of this manual are not covered by warranty. -
Page 6: Specifications
Manual Specifications PCE-MWM PCE-MWM 220 PCE-MWM 210 200/230/240A/ 240B Sensor 0 … 100 % Measuring range Absolute error of moisture see Table 1 measurement +5 … +80 °C Calibration temperature range -20 … +145 °C Measuring range temperature Measuring interval 1 second Length 240B: Length x Width:... -
Page 7: Mechanical Installation
Manual Mechanical installation Note: After the mechanical installation, the sensors must be initialized. For this initial calibration (see 7.4) the measuring volume of the sensor needs to be empty. Additionally a device or an opening to extract samples from needs to be in close vicinity to the installation position in order to calibrate the sensor (see 7.5). -
Page 8: Flange
Manual 5.1.1 Flange Fig. 2 Welding flange Fig. 3 Clamping ring 1) Welding flange 2) Threaded bolt 3) Securing nut 4) Clamping ring 5) Clamping screws 6) Adjusting screws 7) Sensor 8) Through-bore... -
Page 9: Installation
Manual 5.1.2 Installation 1) In order to install the sensor a hole with a diameter of 125 mm needs to be cut out of the wall of the container/mixer. Afterwards the welding flange (1) is welded centrally over the 125 mm hole. The welding flange is manufactured from galvanized steel. -
Page 10: Sensor Coverage
Manual 5.1.3 Sensor Coverage A sufficient material coverage is required to receive an accurate measurement of the material moisture. The measuring volume of the sensor is approximately Ø108 mm x 100 mm. A sufficient material coverage should always be ensured even in case of minimal material level or flow inside the container or on a conveyor belt. Apart from sufficient material coverage it is also important to avoid metallic components within the measuring field of the sensor. -
Page 11: Pce-Mwm 240A
Manual PCE-MWM 240A There are several possibilities of installing the PCE-MWM 240A moisture sensor to a container. The sensor can be connected to the container wall with welds or screws. The following figures show installation examples since several different installation setups are possible depending on container dimensions and geometry. The following examples display a vertical orientation of the sensor. -
Page 12: Installation With Welds
Manual 5.2.2 Installation with welds In order to install the base plate of the sensor, a rectangular cut-out with dimensions of at least 315 x 80 mm needs to be cut from of the container. On curved surfaces the cut-out dimensions deviate and need to be calculated individually depending on the container. -
Page 13: Installation With Screws
Manual 5.2.3 Installation with screws In order to install the base plate of the sensor, a rectangular cut-out with dimensions of at least 315 x 80 mm needs to be cut from the container. Furthermore four holes for the screws have to be drilled through the container wall with distances of 336 / 100 mm between. -
Page 14: Installation With Flange
Manual 5.2.4 Installation with flange 1) Rectangular cut-out in container wall with dimensions of at least 360 x 125 mm. Smooth the edges of the cut-out. 2) Align flange with dimensions as shown in Fig. 13 over the cut-out and weld it to the container wall from the outside. -
Page 15: Installation On Curved Surfaces
Manual 5.2.5 Installation on curved surfaces On curved surfaces the rectangular cut-out in the container wall needs to be individually adjusted to the curvature. Considering the size of the base plate of 356 x 120 mm a possible way is to adjust the cut-out in such a way so that one side is shorter and one side longer than the according length of the base plate. -
Page 16: Sensor Coverage
Manual 5.2.6 Sensor coverage A sufficient material coverage is required to receive an accurate measurement of the material moisture. The measuring volume of the sensor is approximately 360 x 130 x 100 mm. A sufficient material coverage should always be ensured even in case of minimal material level or flow inside the container or on a conveyor belt. Apart from sufficient material coverage it is also important to avoid metallic components within the measuring field of the sensor. -
Page 17: Pce-Mwm 240B
Manual PCE-MWM 240B Two welding flanges are used to install the sensor at the measuring location. Therefore the sensor must be disassembled previous to installation. In order to dismantle the sensor assembly sleeve 3, sleeve 4, welding flange 1 and welding flange 2 must be released and removed from the sensor rod. Sleeve 1 and sleeve 2 can remain on the rod. -
Page 18: Fig. 19 Installation Of The Moisture Sensor Pce-Mwm 240B
Manual Warning: It is not permitted to weld the flanges to the pipe or container while the flanges are connected to the sensor rod or sleeves. It is also not permitted to install the sensor while the electronic unit is connected to the power supply. The pipe or container needs to be empty during cutting and welding. -
Page 19: Sensor Coverage
Manual 5.3.1 Sensor coverage A sufficient material coverage is required to receive an accurate measurement of the material moisture. Sufficient material coverage should always be ensured even in case of minimal material level or flow inside the container or on a conveyor belt. -
Page 20: Electrical Installation
Electrical installation Always use shielded cables to connect the electronic unit of the moisture sensors to external devices, displays and the power supply. Cabling PCE Instruments recommends a sensor / actuator cable type M12 (e.g. Lapp Group). 6.1.1 General properties Coding... -
Page 21: Fig. 22 M12 Connector
Manual 6.1.2.2 Technical drawings Fig. 22 M12 connector Fig. 23 Wiring diagram Fig. 24 Pin assignment... -
Page 22: Fig. 25 Core Identification Code
Manual Fig. 25 Core identification code brown (1), white (2), blue (3), black (4) Fig. 26 Pin assignment for power supply... -
Page 23: Communication
Manual 6.1.3 Communication The connector for the communication interface needs to be a sensor / actuator cable, 5-pos., PUR black, straight socket M12 on free conductor end (e.g.: Lapp Group art. no. 22260404). 6.1.3.1 Technical data Number of contacts Core identification code brown (1), white (2), blue (3), black (4), green- yellow (5) Core insulation, material... -
Page 24: Fig. 29 Pin Assignment
Manual Fig. 29 Pin assignment Fig. 30 Core identification code brown (1), white (2), blue (3), black (4), green- yellow (5) Fig. 31 Pin assignment for signal output... -
Page 25: Analog Output
Manual Analog output The moisture measurement of the moisture sensors PCE-MWM 2xx can be forwarded with a 4 … 20 mA current loop to external devices like e.g. PLC or display. The default scaling of the analog output is as followed: ... -
Page 26: Rs-485 Interface
Manual RS-485 interface Another way to communicate with the moisture sensors PCE-MWM 2xx is the serial port RS-485. This port provides the Modbus RTU protocol. There are several registers which can be read in order to receive data regarding moisture content and temperature among other parameters. - Page 27 Manual 6.3.2.2 Default settings of the electronic unit Baud rate 19200 Parity None Stop bits Address 6.3.2.3 Description of registers Register Register Description address address (DEC) (HEX) 0000 0000 Measured moisture in hundredths of a percent 0001 0001 Temperature in Kelvin 0002 0002 Error code.
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Page 28: Pce-Mwm Manager
Manual PCE-MWM Manager Introduction The measuring principle of the PCE-MWM 2xx moisture sensors utilizes the dielectric properties of material to determine their moisture. These dielectric properties change with moisture content which allows the sensor to measure the moisture. Different materials exhibit varying changes of their dielectric properties when the material moisture increases or decreases. -
Page 29: Overview Pce-Mwm Manager
Manual Overview PCE-MWM Manager The program PCE-MWM Manger is used to connect the electronic unit to a PC in order to change the settings and to create a material-specific calibration. Navigation Tree view Chart Test Status bar Fig. 35 PCE-MWM Manager main window Description: 1) Navigation: Main navigation for connection, calibration and settings... -
Page 30: Connection Electronic Unit
Manual Connection electronic unit After attaching the electronic unit to a PC using an RS-485 converter, a connection can be established with PCE- MWM Manager. An RS-485/USB converter is included in the shipment but other RS-485/USB converter can also be used. -
Page 31: Initial Calibration
Manual After making sure that the RS-485 function of the converter is activated, a connection to the electronic unit can be established: 1) Open settings with the button of the main navigation bar 2) Select correct COM-Port in the menu (see Fig. 37) 3) Select default parameters of the electronic unit: Baud rate 19200, address 127 4) Apply settings with 5) Establish connection with the button... -
Page 32: Fig. 40 Configuration Electronic Unit
Manual Warning: The measuring volume of the sensor must be empty while carrying out the initial calibration. After making sure that the measuring volume of the sensor is empty, the initial calibration can be started: 1) Establish connection to the electronic unit (see 7.3). 2) Open menu Configuration electronic unit (see Fig. -
Page 33: Calibration
Manual In this case the dialog for the initial calibration needs to be started and subsequently No must be selected. This correctly skips the initial calibration and creates a local entry on the PC regarding the already carried out initial calibration which activates the buttons for the calibration. -
Page 34: Fig. 45 Calibration Table
Manual Fig. 45 Calibration table Record sensor data Enter moisture of material Delete sensor data After ensuring a sufficient coverage of the sensor with material, the current sensor data can be recorded with the button which adds a new entry in the table (see Fig. 47). At the same time the integrated temperature sensor measures the material temperature which is added in the input box at the top of the window. -
Page 35: Fig. 47 Calibration Table With First Entry
Manual The displayed sensor data is created by averaging multiple individual measurements of the sensor. By default 10 individual measurements are averaged and the amount can be changed in the settings if necessary (see 7.11). Fig. 47 Calibration table with first entry The recorded sensor data is displayed in the table and the corresponding material moisture needs to be assigned. -
Page 36: Fig. 49 Calibration Table With Multiple Measurements
Manual This procedure needs to be repeated several times to generate enough data for the calibration (see Fig. 49). It is also possible to record multiple sensor measurements in one session and extract their respective samples for the purpose of analyzing multiple samples in parallel. Afterwards the moisture contents can be assigned to the respective sensor data. -
Page 37: Evaluate Calibration
Manual 7.5.3 Evaluate calibration The completed measurements are displayed in a diagram in the right half of the window for the calibration table. A best-fit line is also displayed after at least 3 moisture contents were assigned to the respective sensor data. Since most materials exhibit a linear dependence between sensor data and moisture content, the best-fit line equals the calibration. -
Page 38: Finish Calibration
Manual Fig. 52 shows a flawed calibration. The measurement data does not exhibit a linear dependence between sensor data and moisture content. The data also spreads heavily around the best-fit line which means that this calibration is not suited to determine the moisture content. In this case the installation position of the sensor needs to be reviewed in terms of sufficient material coverage at all times. -
Page 39: Fig. 54 Transfer Best-Fit Line From Electronic Unit
Manual At first a calibration needs to be selected in the tree view of PCE-MWM Manager. After starting the transfer with the button the selected calibration is displayed in the title of the window (see Fig. 53) and an internal slot in the electronic unit needs to be selected. -
Page 40: Export / Import Calibration In .Csv-File
Manual Export / import calibration in .csv-file The calibration can be suspended at any time and resumed at a later time. For this purpose a calibration needs to be selected in the tree view which can then be exported and imported using a .csv-file. -
Page 41: 7.12 Configuration Electronic Unit
Manual 7.12 Configuration electronic unit After successfully establishing a connection between the electronic unit and a PC, the menu Configuration electronic unit can be opened with the main navigation bar (see Fig. 40). The settings in this menu are directly stored in the electronic unit after applying changes with the button ... -
Page 42: Appendix
Manual Appendix Notes for gathering and handling of samples The following notes should be considered in order to create a calibration with high accuracy: The sample should be extracted immediately after recording sensor data The sample should be extracted as close as possible from the installation position of the sensor in order to receive a representative result ... -
Page 43: Moisture Analyzer
Manual Example: Total mass of collected sample: 10 kg Sample �� Container �� Dried sample �� Moisture content Moisture content �� �� �� �� �� [%] (wet) [%] (dry) �� �� 2000 1700 20.00 25.00 2000 1705 19.67 24.48 2000 1695 20.33 25.52... -
Page 44: Contact
Manual Contact If you have any questions about our range of products or measuring instruments please contact PCE Instruments. Germany France Spain PCE Deutschland GmbH PCE Instruments France EURL PCE Ibérica S.L. Im Langel 4 76, Rue de la Plaine des Bouchers...
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