Related Manuals for Vaisala HUMICAP MMT162
Summary of Contents for Vaisala HUMICAP MMT162
- Page 1 USER'S GUIDE Vaisala HUMICAP® Moisture and Temperature Transmitter for Oil MMT162 M210934EN-C...
- Page 2 English versions are applicable, not the translations. The contents of this manual are subject to change without prior notice. This manual does not create any legally binding obligations for Vaisala towards customers or end users. All legally binding obligations and agreements are included exclusively in the applicable supply contract or the General Conditions of Sale and General Conditions of Service of Vaisala.
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Page 3: Table Of Contents
Connecting to Serial Interface ..........22 Installing the Driver for the USB Cable ....... 23 Terminal Program Settings ..........24 List of Serial Commands ............26 Device Information and Status ..........27 Show Device Information ............ 27 VAISALA ________________________________________________________________________ 1... - Page 4 User's Guide ______________________________________________________________________ Show Firmware Version ............27 Configuring Serial Line Operation ........28 Set Serial Line Settings ............28 Set Serial Line Response Time ........... 29 Set Transmitter Address ............29 Format Measurement Output ..........30 Select Unit ................32 Set Serial Interface Mode ............
- Page 5 Analog Output Adjustment............ 58 CHAPTER 7 TECHNICAL DATA ..................59 Measured Parameters ............59 Operating Environment ............60 Inputs and Outputs ..............60 Mechanics ................60 Spare Parts and Accessories ..........61 Dimensions in mm (inches) ..........62 VAISALA ________________________________________________________________________ 3...
- Page 6 User's Guide ______________________________________________________________________ List of Figures Figure 1 Moisture and Temperature Transmitter for Oil MMT162 ..11 Figure 2 Water Solubility of Transformer Oils versus Temperature ..14 Figure 3 Removing the Transportation Protection Cap ......15 Figure 4 Installing the Transmitter ............16 Figure 5 Connecting the Cable ...............
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Page 7: Chapter 1 General Information
This chapter provides general notes for the manual and the product. About This Manual This manual provides information for installing, operating, and ® maintaining Vaisala HUMICAP Moisture and Temperature Transmitter for Oil MMT162. Contents of This Manual This manual consists of the following chapters: - Chapter 1, General Information, provides general notes for the manual and the product. -
Page 8: Version Information
User's Guide ______________________________________________________________________ Version Information Table 1 Manual Revisions Manual Code Description M210934EN-C April 2013. This manual. Updated descriptions of connection cables and serial line commands. Updated list of spare parts and accessories. M210934EN-B March 2009. Previous version. Updated cable specification. -
Page 9: Safety
Chapter 1 ________________________________________________________ General Information Safety ® The Vaisala HUMICAP Moisture and Temperature Transmitter for Oil MMT162 delivered to you has been tested for safety and approved as shipped from the factory. Note the following precautions: WARNING Ground the product, and verify outdoor installation grounding periodically to minimize shock hazard. -
Page 10: Trademarks
United States and/or other countries. License Agreement All rights to any software are held by Vaisala or third parties. The customer is allowed to use the software only to the extent that is provided by the applicable supply contract or Software License Agreement. -
Page 11: Chapter 2 Product Overview
® Vaisala HUMICAP Moisture and Temperature Transmitter for Oil MMT162 provides reliable moisture measurement in wide range of applications. Analog outputs can be chosen between current and voltage signals. Alternatively, digital output RS-485 comes as standard. VAISALA ________________________________________________________________________ 9... -
Page 12: Basic Features And Options
User's Guide ______________________________________________________________________ Basic Features and Options - Two analog outputs - Digital output: RS-485 - USB connectivity for service connections via the optional USB M8 cable - Different cable lengths available - Available with two different thread options: ISO G1/2" and NPT 1/2" - Low maintenance requirements due to excellent long term stability - LED cable option that enables a visual alarm function - Field calibration possible with MM70... -
Page 13: Transmitter Structure
4-pin M8 connector I: analog output channels and operating power 4-pin M8 connector II (shown with protective cap): digital output (RS-485) and operating power 30 mm nut ® HUMICAP sensor protected with stainless steel grid filter Connection thread: ISO G1/2" or NPT 1/2" VAISALA _______________________________________________________________________ 11... -
Page 14: Typical Applications
User's Guide ______________________________________________________________________ Typical Applications Method Used for Measuring Moisture in The MMT162 transmitter measures water in oil in terms of water activity (aw) which can be determined as follows: water activity indicates the amount of water on the scale of 0 - 1 aw. In this scale, 0 aw is an indication of completely water free oil and 1 aw an indication of oil fully saturated with water. -
Page 15: Transformer Oil
Moisture level in oil is thus a true indicator of moisture present in the paper insulation. In addition, it must be noted that capacity of oil to absorb water depends both on the chemical structure of the oil and the additives. VAISALA _______________________________________________________________________ 13... -
Page 16: Figure 2 Water Solubility Of Transformer Oils Versus Temperature
User's Guide ______________________________________________________________________ WATER SOLUBILITY IN MINERAL TRANSFORMER OIL 10000 1000 average water solubility range of variation due to oil type range of variation due to oil type Temperature (°C) 0510-029 Figure 2 Water Solubility of Transformer Oils versus Temperature The margins show the range of variation of water solubility found in mineral oils. -
Page 17: Chapter 3 Installation
Use your hands to turn the probe until it feels tight. Do not use force at this point, and check that the sealing ring (if used) remains centered. VAISALA _______________________________________________________________________ 15... -
Page 18: Figure 4 Installing The Transmitter
User's Guide ______________________________________________________________________ 0805-006 Figure 4 Installing the Transmitter Use a 30 mm wrench to tighten the connection to 25 Nm, as shown in Figure 4 above. If you do not have a 30 mm wrench, use a 1 3/16” wrench or an adjustable wrench instead. CAUTION Only tighten the probe from the 30 mm nut. -
Page 19: Wiring
Chapter 3 _______________________________________________________________ Installation Wiring Wire Color Brown Analog output 1 RS-485 B / D- White Blue Analog output 2 / LED RS-485 A / D+ Black 0707-035 Figure 6 Connectors I and II 1210-005 Figure 7 Connector Pinout VAISALA _______________________________________________________________________ 17... -
Page 20: Connection Cables
User's Guide ______________________________________________________________________ Connection Cables The following connection cable options are available for MMT162: - Shielded cables with M8 female straight threaded connector - Cables with M8 female 90° angle threaded connector - LED cable - USB serial interface cable The figures below show the different cable options that are available. -
Page 21: Power Supply Requirements
14 … 24 VDC. The power supply should maintain the voltage for all load conditions. Current consumption during normal measurement is 20 mA + load current. For more specific information, see chapter Technical data on page 59. VAISALA _______________________________________________________________________ 19... - Page 22 User's Guide ______________________________________________________________________ This page intentionally left blank. 20 __________________________________________________________________ M210934EN-C...
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Page 23: Chapter 4 Operation
Normal operation mode Limit alarm mode When the transmitter is ordered from Vaisala, the modes are configured as specified in the order form. You can change the operation settings after delivery by using serial commands and the USB cable accessory. -
Page 24: Limit Alarm
LED to blink at 0.5 Hz frequency. LED alarm indicator is integrated to a LED cable (Vaisala item MP300LEDCBL) that can be ordered and used instead of a regular connection cable. -
Page 25: Installing The Driver For The Usb Cable
There is no reason to uninstall the driver for normal use. However, if you wish to remove the driver files and all Vaisala USB cable devices, you can do so by uninstalling the entry for Vaisala USB Instrument Driver from the Programs and Features menu in the Windows Control Panel. -
Page 26: Terminal Program Settings
Serial line to connect to field. Note: You can check which port the USB cable is using with the Vaisala USB Instrument Finder program that has been installed in the Windows Start menu. Check that the other serial settings are correct for your connection, and change if necessary. -
Page 27: Figure 12 Putty Terminal Application
Chapter 4 ________________________________________________________________ Operation 0807-004 Figure 12 PuTTY Terminal Application VAISALA _______________________________________________________________________ 25... -
Page 28: List Of Serial Commands
User's Guide ______________________________________________________________________ List of Serial Commands All commands can be issued either in uppercase or lowercase. In the command examples, the keyboard input by the user is in bold type. The notation <cr> refers to pressing the carriage return (Enter) key on your computer keyboard. -
Page 29: Device Information And Status
0.000 mA Ch1 error out 0.000 mA Ch0 aw 0.00 Ch0 aw 1.00 Ch1 T -20.00 'C Ch1 T 80.00 'C Show Firmware Version Use the VERS command to display software version information. Example: vers MMT162 1.02 VAISALA _______________________________________________________________________ 27... -
Page 30: Configuring Serial Line Operation
User's Guide ______________________________________________________________________ Configuring Serial Line Operation Set Serial Line Settings Use the serial line command SERI [b p d s] to set communication settings for the user port. SERI [b p d s]<cr> where Bit rate (110, 150, 300, 600, 1200, 2400, 4800, 9600,19200, 38400) Parity (n = none, e = even, o = odd) Data bits (7 or 8) -
Page 31: Set Serial Line Response Time
Mode on page 33). Use the ADDR command to input the RS-485 transmitter address. ADDR [aaa]<cr> where aaa = address (0 ... 255) (default = 0) Example (configure transmitter to address 99): addr Address : 2 ? VAISALA _______________________________________________________________________ 29... -
Page 32: Format Measurement Output
User's Guide ______________________________________________________________________ Format Measurement Output Use the serial line command FORM to change the format or select certain parameters for the output commands SEND and R. FORM [x]<cr> where Formatter string Formatter string consists of parameters and modifiers. The MMT162 measures the following parameters: - water activity (aw) - temperature (T) (metric unit: ºC, non metric unit:ºF) -
Page 33: Table 6 Form Command Modifiers
= Temperature measurement (T meas error) bit2 = Not used bit3 = Humidity measurement (F meas error) bit4 = Internal error (Program flash check sum error) Device serial number. TIME Time since transmitter startup in format hh:mm:ss. VAISALA _______________________________________________________________________ 31... -
Page 34: Select Unit
User's Guide ______________________________________________________________________ Checksums are calculated as described in the equations below. ∑ ∑ 65536 ⊕ ⊕ ⊕ ≠ ≠ Table 7 Symbols Used in FORM Checksum Equations Symbol Description Value of CS2 checksum in the output message. Value of CS4 checksum in the output message. Value of CSX checksum in the output message. -
Page 35: Set Serial Interface Mode
(aw) temperature (T) (metric unit: ºC, non metric unit: ºF) ppm for transformer oil only (H Example: asel Ch0 aw 0.00 Ch0 aw 1.00 Ch1 T -20.00 'C ? Ch1 T 80.00 'C ? VAISALA _______________________________________________________________________ 33... -
Page 36: Set Analog Output Mode (Ma/V)
User's Guide ______________________________________________________________________ Set Analog Output Mode (mA/V) The AMODE command can be used to change the analog output mode of channels 1 and 2. When used without parameters it displays the current settings and with parameters new settings can be set. The available parameters are listed in Table 8 below. -
Page 37: Set Malfunction Alarm Output For Analog Channels
), an error is reported. If you are using a LED cable, the LED lights up to indicate an error state. Example: alarm ? Channel 1: Low Limit High Limit Aerr Quantity Limit Lo 15.00 Limit Hi 30.00 VAISALA _______________________________________________________________________ 35... -
Page 38: Set Voltage For Led Alarm
User's Guide ______________________________________________________________________ Hysteresis 0.50 Level Lo 0.20 Level Hi 0.80 Channel 2: Low Limit High Limit Aerr Quantity Limit Lo 0.10 Limit Hi 0.90 Hysteresis 0.01 Level Lo 0.20 Level Hi 0.80 Set Voltage for LED Alarm With the LED command, you can set a different voltage level for each channel. -
Page 39: Serial Line Output Commands
Since the interface is half-duplex, you must enter the command when the transmitter is not outputting. Give the command again if the transmitter continues to output measurement messages. See SMODE command on page 33 to change the default (power-up) operation mode. VAISALA _______________________________________________________________________ 37... -
Page 40: Set Output Interval
User's Guide ______________________________________________________________________ Set Output Interval Use the INTV command to set or display the output interval. INTV [n xxx]<cr> where time interval = 0 ... 255 time unit = "S", "MIN", or "H" Example: intv 1 min Output interval: 1 MIN The shortest output interval (with n = 0) is approximately one second due to the internal measurement cycle. -
Page 41: Troubleshooting Commands
Channel 1 output value (V or mA) Channel 2 output value (V or mA) The output shows the test values of the analog channels, and diagnostic information that may be useful to Vaisala Service if there is a problem with the analog outputs. Example: atest 1 15 1.00... -
Page 42: Other Commands
User's Guide ______________________________________________________________________ Other Commands Opening the Transmitter in POLL Mode Use the OPEN command to connect to a transmitter that is in POLL mode. OPEN [aaa]<cr> where address (0 ... 255) Example: open 0 MMT162 0 line opened for operator commands Closing the Connection to a Transmitter in POLL Mode The CLOSE command closes the connection to the transmitter. -
Page 43: Display Command List
Use the HELP command to list the available commands. HELP<cr> Example: help ACAL ADDR ADJD AERR ALARM AMODE AOVER ASEL ATEST CDATE CLOSE CTEXT ERRS FILT FORM FRESTORE HELP INTV OILI OPEN PCOMP PRES RESET SDELAY SEND SERI SMODE UNIT VAISALA _______________________________________________________________________ 41... -
Page 44: Reset Transmitter
User's Guide ______________________________________________________________________ Reset Transmitter When the RESET command is given, the transmitter will restart as if it had just been powered on. All transmitter settings are retained. The serial line mode of the transmitter will be set to the mode that was set using the SMODE command. -
Page 45: Ppm Conversion
The moisture and temperature transmitter MMT162 has an option for ppm-output provided that this has been notified when placing the order for the transmitter. Vaisala has this conversion readily available for mineral transformer oils. Conversion Model with Average Coefficients The conversion model of the MMT162 is based on the average water solubility behaviour of transformer oils. -
Page 46: Conversion Model With Oil-Specific Coefficients
Coefficients For additional accuracy, oil-specific conversion model can be used both for mineral and silicon based oils. An oil sample has to be sent to Vaisala for modelling. As a result, the specific coefficients (A and B) for the transformer oil are determined by Vaisala. For additional information, please contact Vaisala. -
Page 47: Determination Of Oil-Specific Coefficients
- a temperature test chamber. - a suitable container (for example, a conical 1 L flask) sealed by PTFE stopper with an inlet for a moisture probe. - a MMT162 transmitter by Vaisala. - a magnetic stirrer. Procedure: Define the water content of the oil sample with the titration. Use the oil moisture level that is close to real conditions in the process. - Page 48 User's Guide ______________________________________________________________________ Define the correlation between aw, T and PPM (w/w) from the measured values. Calculate A and B according to the following example. [ ] ) A/T1 Example (measured water content 213 ppm): T (°C) saturation 24.1 0.478 213/0.478 = 445.6067 57.6 0.188...
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Page 49: Chapter 5 Maintenance
Dry the probe head with instrument air. In case you are going to calibrate the probe, remove the filter and dry the sensor with instrument air. Check that the sensor looks clean. NOTE Do not immerse the sensor in any polar solvents, for example ketones or alcohols. VAISALA _______________________________________________________________________ 47... -
Page 50: Changing The Filter
New filters can be ordered from Vaisala, see section Spare Parts and Accessories on page 61. Changing the Sensor If you need to change the sensor on your MMT162, send it to Vaisala where the sensor will be changed for you. Error States... -
Page 51: Unknown Serial Settings
You can now check the transmitter’s information by issuing the ? command: The transmitter’s currently stored serial settings are visible on the line marked Baud P D S. VAISALA _______________________________________________________________________ 49... -
Page 52: Technical Support
User's Guide ______________________________________________________________________ Technical Support For technical questions, contact the Vaisala technical support by e-mail at helpdesk@vaisala.com. Provide at least the following supporting information: - Name and model of the product in question - Serial number of the product - Name and location of the installation site - Name and contact information of a technically competent person who can provide further information on the problem. -
Page 53: Calibration And Adjustment
You can calibrate the MMT162 yourself or send it to Vaisala for calibration. Calibration and adjustment is usually carried out through serial line. -
Page 54: Mm70 In Checking And Adjusting
MM70. To check the MMT162 transmitter with MM70: Connect the MMT162 to the MM70 indicator with the appropriate connection cable (Vaisala item 219980). Turn on the MM70. Prepare the probe for adjustment by opening the adjustment menu on the MM70 (Menu →... -
Page 55: Using Mi70
Take the probe out of the reference conditions and replace the filter. Using MI70 To adjust the relative humidity: Connect MI70 to MMT162. Turn MI70 on. On the MI70, go to Menu → Functions → Adjustments. VAISALA _______________________________________________________________________ 53... - Page 56 User's Guide ______________________________________________________________________ Follow the instructions given on the display. Select RH from the list and press Select. When adjusting relative humidity, you need to check the environment settings before making the adjustment. 54 __________________________________________________________________ M210934EN-C...
- Page 57 Chapter 6 ___________________________________________________ Calibration and Adjustment In adjustment mode, enter the correct reference value and then exit by pressing Back. VAISALA _______________________________________________________________________ 55...
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Page 58: One-Point Temperature Adjustment
User's Guide ______________________________________________________________________ One-Point Temperature Adjustment The MMT162 must be unpowered during stabilization which can take 30 minutes or more. Using Serial Line Remove the probe filter and insert the probe into the reference temperature. Enter the command CT and press ENTER: CT<cr>... -
Page 59: Using Mi70
Connect MI70 to MMT162 via connector II. Turn on MI70. On the MI70 display, go to Menu → Functions → Adjustments. Follow the instructions given on the MI70 display. Select T from the list and press Select. VAISALA _______________________________________________________________________ 57... -
Page 60: Analog Output Adjustment
User's Guide ______________________________________________________________________ Select 1-point adjustment and press Select. In adjustment mode, enter the correct reference value and then exit by pressing Back. After you have exited the adjustment mode, MI70 confirms it by displaying the message below. Analog Output Adjustment In the analog output calibration the analog output is forced to the following values: - current output: 2 mA and 18 mA... -
Page 61: Chapter 7 Technical Data
-40 ... +80 °C (-40 ... +176 °F) Accuracy at +20 °C (+68 °F) ± 0.2 °C (± 32.36 °F) Typical temperature dependence of electronics ± 0.005 °C/°C (± 0.003 °F/°F) Sensor Pt100 RTD Class F0.1 IEC 60751 VAISALA _______________________________________________________________________ 59... -
Page 62: Operating Environment
User's Guide ______________________________________________________________________ Operating Environment Operating temperature -40 ... +60 °C (40 ... +140°F) Pressure range metal version up to 200 bar plastic version up to 40 bar Complies with EMC standard EN61326-1: Industrial environment Oil flow some flow recommended Inputs and Outputs Minimum operating voltage with current output... -
Page 63: Spare Parts And Accessories
2 m (9.8 ft) cable, 90° angle connector 221739 5 m (16.4 ft) cable, 90° angle connector 221740 Sampling cells (available only for ISO G1/2") Sampling cell DMT242SC Sampling cell with 1/4" male Swagelok DMT242SC2 connectors VAISALA _______________________________________________________________________ 61... -
Page 64: Dimensions In Mm (Inches)
User's Guide ______________________________________________________________________ Dimensions in mm (inches) 0804-084 Figure 13 Metal Housing Transmitter Dimensions 62 __________________________________________________________________ M210934EN-C... -
Page 65: Figure 14 Plastic Housing Transmitter Dimensions
Chapter 7 ____________________________________________________________ Technical data 0804-085 Figure 14 Plastic Housing Transmitter Dimensions VAISALA _______________________________________________________________________ 63... - Page 66 *M210934EN*...