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Summary of Contents for Panametrics DewPro MMR31
- Page 1 Moisture DewPro® MMR31 Installation & Operation Manual A40251532 Rev.C panametrics.com July 2020...
- Page 3 Installation & Operation Manual A40251532 Rev.C July 2020 panametrics.com Copyright 2020. Baker Hughes company. This material contains one or more registered trademarks of Baker Hughes Company and its subsidiaries in one or more countries. All third-party product and company names are trademarks of their respective...
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- Page 5 Information Paragraphs Note: These paragraphs provide information that provides a deeper understanding of the situation, but is not essential to the proper completion of the instructions. IMPORTANT: These paragraphs provide information that emphasizes instructions that are essential to proper setup of the equipment.
- Page 6 Environmental Compliance Waste Electrical and Electronic Equipment (WEEE) Directive Panametrics Measurement & Control is an active participant in Europe’s Waste Electrical and Electronic Equipment (WEEE) take-back initiative, directive 2012/19/EU. The equipment that you bought has required the extraction and use of natural resources for its production. It may contain hazardous substances that could impact health and the environment.
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Page 7: Table Of Contents
Contents Chapter 1. General Information Unpacking and Inspection..................1 Model Number. - Page 8 Contents DewPro<Superscript>® MMR31 Installation & Operation Manual...
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Page 9: Chapter 1. General Information
Unpacking and Inspection Upon receipt of the DewPro MMR31, examine the shipping carton for broken or open packing, distortion, or any other evidence of mishandling. If your inspection indicates damage to the unit or any of its components may have occurred, notify the carrier within 15 days of delivery and request an inspection. -
Page 10: Version Descriptions
• S. Other Version Descriptions The DewPro MMR31 mid-range moisture transmitter is available in two versions: • One isolated 4-20 mA current loop: The loop current represents the selected moisture unit (see “Selecting the Units of Measure” on page 14). -
Page 11: Theory Of Operation
It is designed to be inserted directly into the process. Various mounting hardware, such as flange and compression fittings are available for mounting into a duct, process chamber, wall, etc. The DewPro MMR31 measures relative humidity in %, dew point temperature in °F or °C, absolute humidity in g/m , or mixing ratio in g/kg. - Page 12 Chapter 1. General Information [no content intended for this page] DewPro<Superscript>® MMR31 Installation & Operation Manual...
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Page 13: Chapter 2. Installation
Chapter 2. Installation Chapter 2. Installation To properly install your MMR31, carefully follow the instructions in this chapter. Mounting the MMR31 To select a suitable mounting location, refer to the dimensions shown in Figure 2 below. 5.56 [141] (w/display) 4.61 [117] (wo/display) NOTE: Dimensions are inches [mm] 4.47 [114] 0.79 [20]... - Page 14 Chapter 2. Installation IMPORTANT: A 1.4571 stainless steel ferrule is required for use in pressurized systems. Ensure that your probe has the appropriate fitting for your application. To monitor moisture inside a pipe or container, mount the probe using a compression fitting connection or a flange (see Figure 3 below).
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Page 15: Using A Bracket
Chapter 2. Installation 2.1.2 Using a Bracket The MMR31 can be used to monitor the air in a room or other such area, by using the available mounting kits shown in Figure 4 below. Panel Mounting 4.45 in. Vertical Pipe Mounting 4.45 in. -
Page 16: Wiring Configurations With One Current Loop
Customer’s Power Supply 24 VDC (12-28 VDC) 115/230 VAC Power Supply (available from Panametrics) 115/230 VAC Power Supply with Display and Optional Relay (available from Panametrics) Figure 5: System Configuration Options DewPro<Superscript>® MMR31 Installation & Operation Manual... -
Page 17: Normal Environments
Chapter 2. Installation 2.2.2 Normal Environments A standard two-wire, stranded cable can be used in a normal environment to interconnect the MMR31 with its loop power source. 2.2.3 Environments with Severe Electrical Noise When the MMR31 is installed in environments with severe electrical noise, wiring must be done with shielded and grounded cable, as shown in Figure 6 below. -
Page 18: General Wiring Instructions
Chapter 2. Installation 2.2.4 General Wiring Instructions To wire the MMR31, refer to Figure 7 below and complete the following steps: Unscrew the cap on the terminal side of the unit. Loosen the cable gland located on the side of the unit. Feed the cable through the conduit opening. -
Page 19: Wiring Configurations With Two Current Loops
Chapter 2. Installation Wiring Configurations with Two Current Loops CAUTION! The MMR31 system contains electronic components that are susceptible to damage by static electricity. Proper handling procedures must be observed during the removal, installation, or other handling of internal circuit boards. 2.3.1 General Guidelines The maximum loop resistance is an important parameter for selection of the supply voltage, because each device... -
Page 20: Normal Environments
Chapter 2. Installation 2.3.2 Normal Environments A standard two-wire, stranded cable can be used in a normal environment to interconnect the MMR31 with its loop power sources. 2.3.3 Environments with Severe Electrical Noise When the MMR31 is installed in environments with severe electrical noise, wiring must be done with shielded and grounded cable, as shown in Figure 9 below. -
Page 21: General Wiring Instructions
Chapter 2. Installation 2.3.4 General Wiring Instructions To wire the MMR31, refer to Figure 10 below and complete the following steps: Unscrew the cap on the terminal side of the unit. Loosen the cable gland located on the side of the unit. Feed the cable through the conduit opening. -
Page 22: Selecting The Units Of Measure
Chapter 2. Installation Selecting the Units of Measure Unless otherwise specified, the MMR31 is shipped with a standard range of 0-100% relative humidity. To select other units of measure, complete the following steps: Remove the cover opposite to the wiring compartment to access Switch S3 (see Figure 11 below). Figure 11: Switch S3 Location Using a 2-mm screwdriver, turn Switch S3 to the position corresponding to your desired units of measure. -
Page 23: Chapter 3. Calibration And Troubleshooting
(±5°C) will introduce an error of approximately 1%. To complete the following procedure, you will need: • Two salt calibration bottles (11.3% and 75.4%) of the type available from Panametrics for RH field calibration • Screwdriver, 2-mm wide • An ammeter or current display with a range of 0-100 mA... -
Page 24: Calibration Steps
Chapter 3. Calibration and Troubleshooting Calibration Steps Note: The following steps describe the use of an ammeter for calibration. If the current loop already contains a current display to indicate the moisture values, an additional ammeter is unnecessary. Remove both covers from the MMR31 enclosure. Disconnect the negative (–) lead of moisture loop 1. -
Page 25: Calibrating The High Rh Reading
Chapter 3. Calibration and Troubleshooting Note: For successful calibration, it is important that the temperature in the salt solution and in the enclosed atmosphere above the solution reach equilibrium at the same value. After waiting for approximately two hours, the ammeter reading should stabilize. If the meter reading is stable at 5.80 mA (or 11.3% on a display), press Sl for at least one second. -
Page 26: Troubleshooting
Solution 2: If the dew point is below 5°F (–15°C), the current will go to the fault current specified on the order or in the matrix field VH 07. Move the sensor into a wetter environment for a few minutes. If the dew point doesn't increase, the cause may be a defective sensor assembly or an electronics malfunction. Contact Panametrics for assistance. Note: The same approach is valid for the other available units of measure and for the second loop (temperature). -
Page 27: Chapter 4. Optional Display/User Interface
Chapter 4. Optional Display/User Interface Chapter 4. Optional Display/User Interface Accessing the Programming Buttons If your MMR31 is equipped with an optional display/user interface, follow the procedure below to access the programming buttons. 4.1.1 Removing the Display To remove the display/user interface, refer to Figure 14 below and complete the following steps: Unscrew and remove the protective cover from the top of the MMR31, exposing the display module. -
Page 28: Programming The Matrix
Note: For users of other Panametrics equipment, this matrix format may be familiar. However, this section describes the features and usage of the various matrix locations only as they apply to the MMR31. - Page 29 Chapter 4. Optional Display/User Interface DewPro<Superscript>® MMR31 Installation & Operation Manual...
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Page 30: Matrix Buttons - Special Functions
Chapter 4. Optional Display/User Interface Matrix Buttons - Special Functions 4.3.1 Reset to “Normal” Display Pressing the V and H buttons simultaneously returns the user to VH 00 (normal display). 4.3.2 Display Only Eight (8) matrix locations are for display only and may not be changed by the user (see Table 3 on page 21). The “display only”... -
Page 31: Matrix Functions
Chapter 4. Optional Display/User Interface Matrix Functions This section describes the functions available to the user through the matrix, grouped by common function areas (see Table 3 on page 21). Each function is accessed by moving to its specified location within the matrix. 4.4.1 System Administration Functions Table 5:... -
Page 32: Moisture Measurement Functions
Chapter 4. Optional Display/User Interface 4.4.2 Moisture Measurement Functions Table 6: Function Location Description Display VH 00 This location displays the current process humidity value measured by the instrument. Current The units of measure for the displayed value (i.e., % RH, dew point or units selected Process Value under VH 01) is selected in position VH 01. -
Page 33: Temperature Measurement Functions
Chapter 4. Optional Display/User Interface 4.4.4 Temperature Measurement Functions Table 8: Function Location Description Displaying the VH 40 Selecting this location displays the present process temperature. The unit of measure Measured (°F/°C) is the unit selected in location VH41 (see below). Temperature Selecting the VH 41... -
Page 34: Error Codes
Chapter 4. Optional Display/User Interface 4.4.5 Error Codes During normal MMR31 operation, it is possible for the temperature channel to be in error, while the RH channel still reads correctly. It is also possible for the RH channel to be in error, while the temperature channel still reads correctly. If a moisture unit that depends on both the RH and temperature values (e.g., dewpoint) is selected, the error conditions for both RH <... - Page 35 Chapter 4. Optional Display/User Interface 4.4.5 Error Codes (cont.) When a value other than 0 is displayed in matrix location VH 90, complete the following steps to determine the cause of the error (a value of 39 is used as an example in the steps below): Divide the error code displayed in matrix location VH 90 by 16....
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Page 37: Chapter 5. Specifications
Chapter 5. Specifications Chapter 5. Specifications Technical Specifications Sensing Element: Silicon-based polymer, capacitance principle, IC electronics RH Range: 0 to 100% RH Accuracy: ±2% in the range of 0% to 90% at 25°C ±3% in the range of 90% to 100% at 25°C Dew Point Range:... -
Page 38: Optional Onboard Display With User Interface
Chapter 5. Specifications Technical Specifications (cont.) Electronics: Microcontroller operation EM I/RFI Protection: See “EMI/RFI Protection” on page 31 Moisture Units: % RH, dew point temperature in °F or °C, absolute humidity in g/m , or mixing ratio in g/kg, hardware selectable Power Supply:... -
Page 39: Emi/Rfi Protection
• Panel mount display, power supply, no relays • Panel mount display, power supply, two alarms • Panel mount display, power supply, two alarms, 4-20 mA repeating output Note: For other requirements, contact Panametrics for assistance. DewPro<Superscript>® MMR31 Installation & Operation Manual... - Page 40 Chapter 5. Specifications [no content intended for this page] DewPro<Superscript>® MMR31 Installation & Operation Manual...
- Page 41 Index Functions Accessories, Available ........31 4-20 mA Output Range.
- Page 42 Index Removing the Display ........19 Response Time, Slow .
- Page 43 AUTHORIZATION NUMBER (RAN), and shipping instructions for the return of the instrument to a service center will be provided. If Panametrics instructs you to send your instrument to a service center, it must be shipped prepaid to the authorized repair station indicated in the shipping instructions.
- Page 44 Warranty [no content intended for this page] DewPro<Superscript>® MMR31 Installation & Operation Manual...
- Page 45 Contact Us! • Break/fix technical support issues for a prod- Global Technical Support Team uct you currently have Email: mstechsupport@bakerhughes.com Phone: 8000-833-9438, option 3. • RMA Repair Requests, Calibration Requests, International - Baker Hughes Customer care Document and Certificate requests for a Email: gesensingorders@bakerhughes.com product you currently have Phone: +36 27 565 314...
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