Subscribe to Our Youtube Channel
Related Manuals for Vaisala HUMICAP MMT162
Summary of Contents for Vaisala HUMICAP MMT162
- Page 1 Instrument Expert Original factory packaging www.dorgean.com USER'S GUIDE Vaisala HUMICAP® Moisture and Temperature Transmitter for Oil MMT162 M210934EN-G...
- Page 2 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.
-
Page 3: Table Of Contents
Limit Alarm ................22 Serial Communication ............23 Connecting to Serial Interface ..........23 Installing the Driver for the USB Cable ....... 24 Terminal Program Settings ..........25 List of Serial Commands ............27 Device Information and Status ..........28 VAISALA _________________________________________________________________________ 1... - Page 4 User's Guide _______________________________________________________________________ Show Device Information............. 28 Show Firmware Version ............28 Configuring Serial Line Operation ........29 Set Serial Line Settings ............29 Set Serial Line Response Time ........... 30 Set Transmitter Address ............30 Format Measurement Output ..........31 Select Unit ................
- Page 5 Spare Parts and Accessories ..........68 Dimensions in mm (inches) ..........69 APPENDIX A MODBUS REFERENCE ................71 Default Communication Settings .......... 71 Supported Modbus Functions ..........71 Modbus Register Map ............72 Device Identification Objects ..........73 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 ...............
-
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-G March 2017. This manual. IP class specification for probe versions with metal housing updated to IP66 (applies to probes manufactured from March 2017 onwards). Weather shield order code corrected. M210934EN-F June 2016. -
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
Table 3 Parameters Measured and Calculated by MMT162 Parameter Abbreviation Metric Unit Non Metric Unit Water activity Relative saturation Temperature °C °F Mass concentration of water in oil NOTE The ppm output is only applicable for transformer oil. VAISALA _________________________________________________________________________ 9... -
Page 12: Basic Features And Options
User's Guide _______________________________________________________________________ Basic Features and Options - Two analog outputs - Digital output: RS-485 with onboard Modbus protocol - 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 ) and relative saturation (%RS). With the help of internal oil solubility coefficients, MMT162 is also able to output oil moisture in ppm (supported by default only for mineral transformer oil). -
Page 15: Lubrication Oil
In extreme cases this can result in arcing and short circuits within the windings. Accurate moisture measurements can also warn about leaks in the oil system, as water is absorbed from the surrounding air. VAISALA ________________________________________________________________________ 13... -
Page 16: Figure 2 Water Solubility Of Transformer Oils Versus Temperature
User's Guide _______________________________________________________________________ Heating and cooling of a transformer affect moisture levels in oil. This is due to the fact that the water solubility of oil is temperature dependent. In general, water solubility increases as temperature rises; see Figure 2 on page 14. -
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: Weather Shield Installation Accessory
If the conditions in the transmitter’s installation location demand additional protection from, for example, rain or spray, you can protect the transmitter with the optional metal weather shield accessory (Vaisala order code ASM245628SP). For more information on ordering spare parts and accessories, see Spare Parts and Accessories on page 68. -
Page 20: Connection Cables
User's Guide _______________________________________________________________________ 1210-005 Figure 7 Connector Pinout 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: Figure 8 Cable With Threaded Connector
Chapter 3 ________________________________________________________________ Installation 1210-063 Figure 8 Cable with Threaded Connector 1211-024 Figure 9 Cable with 90° Angle Threaded Connector VAISALA ________________________________________________________________________ 19... -
Page 22: Power Supply Requirements
User's Guide _______________________________________________________________________ 1211-025 Figure 10 LED Cable 1210-062 Figure 11 USB Serial Interface Cable Power Supply Requirements The MMT162 transmitters are designed to operate with a supply voltage of 14 … 24 VDC. The power supply should maintain the voltage for all load conditions. Current consumption during normal measurement is 20 mA + load current. -
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: Normal Operation Mode And Malfunction 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: Serial Communication
Connecting to Serial Interface The MMT162 can be connected to a PC using the RS-485 line, for example using the USB serial connection cable (Vaisala item 219690). The cable also provides operation power to the transmitter from the USB port. It is OK to connect the USB serial connection cable even if the transmitter is already supplied with operation power from another cable. -
Page 26: Installing The Driver For The Usb Cable
PC. Windows will detect the new device, and use the driver automatically. The installation has reserved a COM port for the cable. Verify the port number, and the status of the cable, using the Vaisala USB Instrument Finder program that has been installed in the Windows Start menu. -
Page 27: 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 28: Figure 12 Putty Terminal Application
User's Guide _______________________________________________________________________ 0807-004 Figure 12 PuTTY Terminal Application 26 _______________________________________________________________________________... -
Page 29: List Of Serial Commands
SERI [baud p d s] User Port settings (Default: 4800 E 7 1) baud: 300 ... 115200 SMODE Set the serial interface mode [STOP/RUN/POLL/MODBUS] UNIT [M/N] Select the metric or non-metric output units VERS Display the software version information VAISALA ________________________________________________________________________ 27... -
Page 30: Device Information And Status
User's Guide _______________________________________________________________________ Device Information and Status Show Device Information The ? command outputs a listing of device information. If you wish to display the listing for all devices on the current serial line, issue the command ??. ?<cr> ??<cr> Example: MMT162 0.92 Serial number... -
Page 31: Configuring Serial Line Operation
4800 O 7 1 seri 600 n 8 1 changing all parameters 600 N 8 1 You can use the SERI command to change/view the user port settings even if you are currently connected to the service port. VAISALA ________________________________________________________________________ 29... -
Page 32: Set Serial Line Response Time
User's Guide _______________________________________________________________________ Set Serial Line Response Time With the SDELAY command you can set delay (response time) of the serial line, or view the currently set delay value. SDELAY [delay]<cr> where delay = Serial line delay, range 0 ... 255. Multiply the value by four to get milliseconds (for example, delay value of 10 equals 40 millisecond delay). -
Page 33: Format Measurement Output
0.2644 25.50 Example (configure transmitter to output ppm only): form "Oil ppm= " h2o " " u3 #r#n send Oil ppm= 16.6 ppm Example (configure transmitter to default output format): form / send 0.087 T= 24.0 'C VAISALA ________________________________________________________________________ 31... -
Page 34: Table 6 Form Command Modifiers
User's Guide _______________________________________________________________________ Table 6 FORM Command Modifiers Modifier Description Restores the default output message (depends on the device configuration). Used alone. Length modifier (number of digits and decimal places). parameter Abbreviation of a measured parameter, for example aw. Outputs the measured value of the parameter, or * characters if measured value is not available. -
Page 35: Select Unit
Bit-wise exclusive-or operator. Byte value of ASCII $ character. Byte value of ASCII * character. Select Unit Use the UNIT command to select metric or non-metric output units. UNIT [x]<cr> where M or N where Metric units Non-metric units VAISALA ________________________________________________________________________ 33... -
Page 36: Set Serial Interface Mode
User's Guide _______________________________________________________________________ Set Serial Interface Mode Use the SMODE command to set the default serial interface mode. SMODE [xxxx]<cr> where xxxx = STOP, RUN or POLL Table 8 Output Modes Mode Measurement Output Available Commands Only with the SEND command. All (default mode). STOP Only command S. -
Page 37: Configuring Measurement Parameters
Table 9 below. Table 9 Analog Output Modes Parameter Output mode 0 … 20 mA 4 … 20 mA 0 … 5 V 0 … 10 V LED alarm Current alarm Voltage alarm VAISALA ________________________________________________________________________ 35... -
Page 38: Calibrate Analog Output
User's Guide _______________________________________________________________________ Example: amode 1 2 Ch1 output : 0 ... 20 mA Ch2 output : 4 ... 20 mA Calibrate Analog Output Use the ACAL command to adjust analog output channels. ACAL [channel]<cr> where channel = Analog output channel to be adjusted, 1 or 2. After entering the ACAL command, use a calibrated current/voltage meter to measure the output, and enter the values. -
Page 39: Set Alarm Limits And Led Indication For Analog Outputs
Quantity Limit Lo 15.00 Limit Hi 30.00 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 VAISALA ________________________________________________________________________ 37... -
Page 40: Set Voltage For Led Alarm
User's Guide _______________________________________________________________________ Set Voltage for LED Alarm With the LED command, you can set a different voltage level for each channel. LED<cr> Example: led ? Ch 1 Led Voltage 2.80 V Ch 2 Led Voltage 2.80 V Extend Analog Output Range Use the AOVER command to allow the analog output channels to exceed their specified range by 10 %. -
Page 41: Stop Measurement Output
The output format depends on which parameters the transmitter can output. SEND [aaa]<cr> where aaa = Transmitter address (0 ... 255). Must be specified if the transmitter is in POLL mode, and a line has not been opened using the OPEN command. VAISALA ________________________________________________________________________ 39... -
Page 42: 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 43: Other Commands
(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. CLOSE<cr> Example: close line closed VAISALA ________________________________________________________________________ 41... -
Page 44: Display Command List
User's Guide _______________________________________________________________________ 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... -
Page 45: Show User Calibration Coefficients
After you enter the command, you will be prompted to enter new values for the coefficients. The default offset is zero (0), default gain is one (1). Example (shows user adjusted offset values, overwrites them with 0): RH offset : -4.35084105E-04 RH gain 1.00000000E+00 offset : -1.62982941E-02 gain 1.00000000E+00 VAISALA ________________________________________________________________________ 43... -
Page 46: 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 47: Modbus Communication
For example, if you want to deactivate the Modbus mode on a MMT162 device, follow the procedure above and deactivate the Modbus mode with command SMODE STOP. On subsequent power-ups, the serial command interface will be activated. VAISALA ________________________________________________________________________ 45... -
Page 48: Configuration Commands Related To Modbus
User's Guide _______________________________________________________________________ Configuration Commands Related to Modbus In addition to enabling the Modbus protocol in the device, Modbus over RS-485 needs the following software settings: serial bit rate, parity, number of stop bits, and Modbus device address.Use the service commands listed in Table 10 below to configure the Modbus RTU using the USB service cable. -
Page 49: Ppm Conversion
The ppm output shows the average mass concentration of water in oil. 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... -
Page 50: 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 51: 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 Vaisala MMT162 transmitter. - 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 52 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...
-
Page 53: 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 ________________________________________________________________________ 51... -
Page 54: Changing The Filter
New filters can be ordered from Vaisala, see section Spare Parts and Accessories on page 68. Changing the Sensor If you need to change the sensor on your MMT162, contact a Vaisala Service Center. For contact details, see www.vaisala.com/servicecenters. Error States... -
Page 55: 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 ________________________________________________________________________ 53... -
Page 56: 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 57: Calibration And Adjustment
Performing an accurate calibration and adjustment takes some time and preparation. Instead of doing it yourself, you can also have a Vaisala service center calibrate and adjust your transmitter. For service center contact information, see www.vaisala.com/servicecenters. -
Page 58: Adjustment Points
User's Guide _______________________________________________________________________ Adjustment Points Humidity Measurement You can adjust the humidity measurement of the MMT162 in one or two points: - One-point adjustment changes the RH measurement offset or gain. The transmitter determines which coefficient (offset or gain) should be changed based on the measured humidity. -
Page 59: Adjustment Procedures
Chapter 6 ___________________________________________________ Calibration and Adjustment Adjustment Procedures ® You can calibrate and adjust MMT162 using Vaisala HUMICAP hand- held moisture and temperature in oil meter MM70. See the following sections: - Calibration and Adjustment Using MM70 and a Reference Probe below. - Page 60 User's Guide _______________________________________________________________________ Wait for 30 minutes for temperature and humidity to stabilize. Turn on the MI70. Select Display → Quantities and units from the menu of the MI70, and verify that measurements from both ports (I and II) are available. If the MMT162 is not detected, it may be because it is already powered up and using non-default serial line settings.
-
Page 61: Calibration And Adjustment Using Mm70 And A Reference Environment
- One or two reference environments that fulfill the requirements listed in section Adjustment Points on page 56. For example, you can use the Vaisala HMK15 humidity calibrator for a two-point humidity calibration and adjustment. Use the LiCl (11 %RH) and NaCl (75 %RH) salt solutions. - Page 62 User's Guide _______________________________________________________________________ The adjustment mode starts. Automatic power off is disabled while in adjustmend mode; press OK to acknowledge the message. Select the parameter to calibrate and adjust (RH or T) from the list and press Select. This procedure is applicable for both parameters, but the following steps will assume you selected RH.
- Page 63 You will see the text Adjustment done. You have now completed the 2-point adjustment. Select Back to return to the parameter selection screen, and Exit to leave the adjustment mode. Remove the MMT162 from the reference environment and reattach the filter. VAISALA ________________________________________________________________________ 61...
-
Page 64: Relative Humidity Adjustment On Serial Line
- One or two humidity references that fulfill the requirements listed in section Adjustment Points on page 56. For example, you can use the Vaisala HMK15 humidity calibrator for a two-point humidity calibration and adjustment. Use the LiCl (11 %RH) and NaCl (75 %RH) salt solutions. - Page 65 Enter: 74.3220 2. ref ? 75.5 The RH adjustment is now complete. Enter the l command to verify that the calibration coefficients for RH have changed. Remove the MMT162 from the reference environment and reattach the filter. VAISALA ________________________________________________________________________ 63...
-
Page 66: Temperature Adjustment On Serial Line
- Windows operating system - Terminal application - Free USB port - Driver for Vaisala USB cable installed - USB serial interface cable (219690) - One or two temperature references that fulfill the requirements listed in section Adjustment Points on page 56. -
Page 67: Analog Output Adjustment
- Voltage output: 10 % and 90 % of the range. Connect MMT162 to a calibrated current/voltage meter in order to measure either current or voltage depending on the selected output type. To calibrate analog output, see section Calibrate Analog Output on page VAISALA ________________________________________________________________________ 65... -
Page 68: Chapter 7 Technical Data
User's Guide _______________________________________________________________________ CHAPTER 7 TECHNICAL DATA This chapter provides the technical data of the product. Specifications Table 12 Water Activity / Relative Saturation Property Description / Value Measurement range a / %RS 0...1 (@-40...+180 °C/ -40...+356 °F) %RS 0 … 100 %RS Accuracy (including nonlinearity, ±0.02 (0...0.9) hysteresis and repeatability) when... -
Page 69: Table 15 Inputs And Outputs
Housing classification Metal housing: IP66 Plastic housing: IP65 Mechanical connections Option 1 ISO G1/2" Option 2 NPT 1/2" Weight Metal with ISO thread 200 g Metal with NPT thread 200 g Plastic with ISO thread 65 g VAISALA ________________________________________________________________________ 67... -
Page 70: Spare Parts And Accessories
User's Guide _______________________________________________________________________ Spare Parts and Accessories Information on spare parts, accessories, and calibration products is available online at www.vaisala.com and store.vaisala.com. Description Order code Connection cable for MM70 219980 USB serial interface cable 219690 CH1 signal + Ch2 LED cable, M8 threaded... -
Page 71: Dimensions In Mm (Inches)
Chapter 7 _____________________________________________________________ Technical data Dimensions in mm (inches) 0804-084 Figure 13 Metal Housing Transmitter Dimensions VAISALA ________________________________________________________________________ 69... -
Page 72: Figure 14 Plastic Housing Transmitter Dimensions
User's Guide _______________________________________________________________________ 0804-085 Figure 14 Plastic Housing Transmitter Dimensions 70 _______________________________________________________________________________... -
Page 73: Appendix Amodbus Reference
See Table 19 on page 72 for available registers. 43 14 2B 0E Read Device Identification See Table 20 on page 73 for available device identification objects. NOTE After power-up, wait for five seconds before sending Modbus requests. VAISALA ________________________________________________________________________ 71... -
Page 74: Modbus Register Map
User's Guide _______________________________________________________________________ Modbus Register Map Table 19 Modbus Register Map Logical PDU Address Register Description Data Register Notes Address (hexadecimal) Format Type (decimal) 00 02 T (measured) 32-bit read-only °C float 00 03 00 1C (measured) 32-bit read-only float 00 1D 00 22 O (oil) (measured) *... -
Page 75: Device Identification Objects
VendorName Vaisala ProductCode MMT162 MajorMinorVersion 1.10 VendorUrl http://www.vaisala.com ProductName Vaisala HUMICAP® Moisture and Temperature Transmitter for Oil MMT162 SerialNumber* H0510038 CalibrationDate* 2014-08-21 CalibrationText* Vaisala/HEL Vaisala-specific device information object NOTE Both stream access and individual access to the device identification objects are supported. - Page 76 Instrument Expert Original factory packaging www.dorgean.com www.vaisala.com *M210934EN*...
Need help?
Do you have a question about the HUMICAP MMT162 and is the answer not in the manual?
Questions and answers