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WM281/291 User’s Manual

Michell Instruments

19

appendix C

Appendix C

Digicor2 280/290

Communications Kit (optional)

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Summary of Contents for WM281

Page 1: ...WM281 291 Premium Wall Mount RH Temperature Transmitters User s Manual 97463 Issue 1 July 2014 T 2 4 5 DP 1 1 25 H 4 5 7 C F...

Page 2: ...formation when contacting Michell Instruments for service purposes Transmitter Code Serial Number Invoice Date Location of Instrument Tag No Transmitter Code Serial Number Invoice Date Location of Ins...

Page 3: ...ay not be copied or otherwise reproduced communicated in any way to third parties nor stored in any Data Processing System without the express written authorization of Michell Instruments Ltd For Mich...

Page 4: ...pply 5 2 5 4 Digital Serial Interface 6 2 5 4 1 Modbus Register Holding Map 6 2 6 Analog Output Configuration 6 2 7 Interchangeable Sensor Module 7 2 8 Calibration Reference Equipment 7 2 9 Certificat...

Page 5: ...endix D EC Declaration of Conformity 22 Appendix E Quality Recycling Warranty Information 24 E 1 Pressure Equipment Directive PED 97 23 EC 24 E 2 Recycling Policy 24 E 3 WEEE Compliance 24 E 4 RoHS2 C...

Page 6: ...urer for use with the instrument Toxic Materials The use of hazardous materials in the construction of this instrument has been minimized During normal operation it is not possible for the user to com...

Page 7: ...ec meters per second RH relative humidity s second T temperature V volt Warnings The following general warning listed below is applicable to this instrument It is repeated in the text in the appropria...

Page 8: ...calculated providing 4 20 mA 0 20 mA 0 10 V 0 1 V and 0 5 V The 290 Series Transmitters are equipped with an LCD display mounted in the cover of the housing making it possible to display the temperat...

Page 9: ...renheit F Absolute humidity The mass of vapor present in the unit of volume of humid gas at defined temperature and pressure levels The unit of measure is 1g of water cubic meter g m3 Mixing ratio or...

Page 10: ...site choice for the transmitter must be made bearing in mind the effectiveness of air circulation The point at which the sensor is installed must be typical of the surrounding environment where the me...

Page 11: ...ansmitters can be equipped with the following filter models K7 Standard Delrin cap with steel mesh filter for use in environments which are relatively clean and where there is poor ventilation H2 Sint...

Page 12: ...12 13 14 Figure 3 Electrical Connections The electrical connection box is located in the main body of the WM281 291 Transmitters Undo the four screws on the face of the transmitter and carefully lift...

Page 13: ...ix B 2 6 Analog Output Configuration On the WM281 291 Transmitters configuration of the three analog outputs can be achieved automatically via the RS485 Modbus interface with the Digicor2 Configuratio...

Page 14: ...f all I7000 sensor modules include the serial number the date of calibration 2 8 Calibration Reference Equipment The following calilbrators are available for the WM281 291 Transmitters 503 Humidity ca...

Page 15: ...low Once the required sub menu is reached edit by pressing the key then choose the value by pressing the up and down keys and confirm by pressing the key then choose the key To exit the sub menu press...

Page 16: ...otected mode by changing the password from 99 to any other value or by power supply disconnection 3 Out Temperature Out type 4 20 mA 0 20 mA 0 10 V 0 1 V 0 5 V Low scale High scale refer to Section 2...

Page 17: ...Issue 1 July 2014 OPERATION 8 RH Calibration Set RH Restore factory settings NOTE Changes to some of these settings may lead to the loss of calibration data and should only be changed by qualified per...

Page 18: ...cb connector as per Section 2 5 1 Insert the USB connector into the PC and follow the instructions as in Section 4 2 below 4 2 Software Installation To install the Digicor2 software make sure all runn...

Page 19: ...ng care not to bend the male pins on the sensor electrical connector remove the I7000 to be replaced and insert the new component 4 Ensure that the appropriate adhesive label with the date of calibrat...

Page 20: ...WM281 291 User s Manual Michell Instruments 13 appendix a Appendix A Technical Specifications...

Page 21: ...485 Supply Voltage 15 27 V AC and 18 38 V DC Load Resistance Current output R 500 Power Consumption 1 7 W maximum CE Conformity 2004 108 EC Operating Specifications Operating Temperature Probe Housing...

Page 22: ...WM281 291 User s Manual Michell Instruments 15 appendix B Appendix B Modbus Holding Register Map...

Page 23: ...int Calibration R W 999 999 0 2 C Get Set Single Point Calibration offset for Temperature input 24 Digital Temperature Filter R W 0 0 20 0 0 8 1 Seconds Get Set Digital Filter value for Temperature in...

Page 24: ...lue of Analog output for Humidity 159 RESERVED R 0 0 160 Type of Analog output for Calculated Variable R W 0 130 1 0 Get Set Analog output type for Calculated Variable 0 0 20mA 1 4 20mA 128 0 1V 129 0...

Page 25: ...it 30 C 31 F 401 403 RESERVED R 0 0 406 419 RESERVED R 0 0 420 Calculated Variable Type R W 0 5 0 0 Get Set Calculation Type 0 Dew Point 1 Mixing Ratio 2 Absolute Humidity 3 Enthalpy 4 Frost Point 421...

Page 26: ...WM281 291 User s Manual Michell Instruments 19 appendix C Appendix C Digicor2 280 290 Communications Kit optional...

Page 27: ...following files Digicor2 280 290 configuration software USB to RS485 convertor drivers USB to RS485 convertor hardware USB to RS485 convertor hardware connection instructions The connection details ar...

Page 28: ...WM281 291 User s Manual Michell Instruments 21 appendix D Appendix D EC Declaration of Conformity...

Page 29: ...WM281 291 User s Manual 22 97463 Issue 1 July 2014 appendix D Appendix D EC Declaration of Conformity...

Page 30: ...WM281 291 User s Manual Michell Instruments 23 appendix E Appendix E Quality Recycling Warranty Information...

Page 31: ...ich may be harmful to the environment Similarly we are increasingly using recyclable and or recycled material in our business and products wherever it is practical to do so To protect natural resource...

Page 32: ...ctive 2011 65 EU Article 3 24 defines Control and Monitoring Equipment specifically as monitoring and control instruments designed exclusively for industrial or professional use RoHS2 EU Directive 201...

Page 33: ...tains a hazardous material register in which MSDS data sheets are collated and we will check that our suppliers will comply to REACH requirements for all materials and substances we use in the process...

Page 34: ...s of action will be taken If the fault is covered under the terms of the warranty the instrument will be repaired at no cost to the owner and returned If Michell Instruments determines that the fault...

Page 35: ...WM281 291 User s Manual 28 97463 Issue 1 July 2014 appendix F Appendix F Recommended Practices in Humidity Measurements...

Page 36: ...his may require from only a few minutes to many hours Follow Michell Instruments care instructions for the instrument Some instruments need routine cleaning or other maintenance Before using any solve...

Page 37: ...t must be avoided These can result in overestimates of the humidity of the air between the droplets Such results may exceed 100 RH or may be impossible to interpret meaningfully Droplets of liquid als...

Page 38: ...low humidity anything much below a dew point of 0 C the amounts of water given off by organic and porous materials can dramatically affect the value of humidity The lower the level of moisture the mor...

Page 39: ...ilters and saturation guarding may protect the sensor but these actions carry a risk of damage by condensation or other contamination Protective filters can slow the response time of sensors This can...

Page 40: ...WM281 291 User s Manual Michell Instruments 33 appendix G Appendix G Return Document Decontamination Declaration...

Page 41: ...ls YES NO Radioactive substances YES NO Other hazards YES NO Please provide details of any hazardous materials used with this equipment as indicated above use continuation sheet if necessary Your meth...

Page 42: ...http www michell com...

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