Summary of Contents for Alava Ingenieros Vaisala HUMICAP HMT310
- Page 1 USER'S GUIDE Vaisala HUMICAP® Humidity and Temperature Transmitter HMT310 M210619EN-E...
- Page 2 PUBLISHED BY Vaisala Oyj Street address: Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland Mailing address: P.O. Box 26, FI-00421 Helsinki, Finland Phone: +358 9 8949 1 Fax: +358 9 8949 2227 Visit our Internet pages at www.vaisala.com. © Vaisala 2014 No part of this manual may be reproduced, published or publicly displayed in any form or by any means, electronic or mechanical (including photocopying), nor may its contents be modified, translated, adapted, sold or disclosed to a third party without prior written permission of the copyright holder.
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Page 3: Table Of Contents
_________________________________________________________________________________ Table of Contents CHAPTER 1 GENERAL INFORMATION ................9 About This Manual ..............9 Version Information ............. 10 Related Manuals ..............10 Documentation Conventions ..........10 Safety ..................11 ESD Protection ..............11 Recycling ................12 Regulatory Compliances ............12 Emissions ............... - Page 4 User's Guide _______________________________________________________________________ Power Supply Requirements ..........34 CHAPTER 4 OPERATION ....................35 Power Supply ................35 Transmitter Start-Up ............... 35 Serial Line and Analog Communication Options ....36 RS-232 Serial Port Connection ........... 36 USB Connection ..............37 Installing the Driver for the USB Cable ......37 Connection to an MI70 Hand-held Indicator ......
- Page 5 _________________________________________________________________________________ Chemical Purge in Powerup ..........60 Chemical Purge Activated Manually ........60 Starting Manual Chemical Purge ........60 Sensor Heating (Optional) ............. 61 General ................61 HMT317 Fuel Cell Model Heating Settings ....61 Setting Humidity Sensor Heating ......... 62 Sensor Heating ON/OFF .............
- Page 6 User's Guide _______________________________________________________________________ CHAPTER 7 TECHNICAL DATA ..................87 Specifications ................. 87 Calculated Variables ............90 Accuracies of Calculated Variables ........90 Accuracy of Dewpoint Temperature °C ......90 Accuracy of Mixing Ratio g/kg (Ambient Pressure 1013 mbar) ........90 Accuracy of Wet Bulb Temperature °C ......
- Page 7 _________________________________________________________________________________ List of Figures Figure 1 HMT310 Transmitter Parts ............17 Figure 2 HMT310 Probes ............... 18 Figure 3 Mounting with Mounting Plates ..........22 Figure 4 Mounting Plate Dimensions............23 Figure 5 Rain Shield with Larger Mounting Plate ........24 Figure 6 Measurement Error at 100 %RH when Difference Between Ambient and Sensor Temperature is 1 °C .......
- Page 8 User's Guide _______________________________________________________________________ List of Tables Table 1 Manual Revisions ..............10 Table 2 Related Manuals ............... 10 Table 3 HMT310 Output Quantities ............16 Table 4 HMT318 Probe Dimensions ............. 31 Table 5 Current Consumption by Output Type/Function ....... 34 Table 6 Measurement Output ..............
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Page 9: Chapter 1 General Information
Chapter 1 _________________________________________________________ General Information CHAPTER 1 GENERAL INFORMATION This chapter provides general notes for the manual and the HMT310. About This Manual This manual provides information for installing, operating, and maintaining Humidity and Temperature Transmitter HMT310. This manual consists of the following chapters: - Chapter 1, General Information, provides general notes for the manual and the HMT310. -
Page 10: Version Information
User's Guide _______________________________________________________________________ Version Information Table 1 Manual Revisions Manual Code Description M210619EN-E March 2014. This manual. New software functionality applicable from version 2.0.1 onward. Voltage output added to analog output options, new voltage parameters in the AMODE command. Multipoint calibration instructions and MPC command added. -
Page 11: Safety
Chapter 1 _________________________________________________________ General Information Safety The Humidity and Temperature Transmitter HMT310 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 12: Recycling
User's Guide _______________________________________________________________________ Recycling Recycle all applicable material. Dispose of the unit according to statutory regulations. Do not dispose of with regular household refuse. Regulatory Compliances The Humidity and Temperature Transmitter HMT310 complies with the following performance and environmental test standards: - EMC standard EN61326-1, Industrial environment. -
Page 13: Trademarks
Chapter 1 _________________________________________________________ General Information Trademarks ® HUMICAP is a registered trademark of Vaisala. Windows® is a registered trademark of Microsoft Corporation in the United States and/or other countries. Software License This product contains software developed by Vaisala. Use of the software is governed by license terms and conditions included in the applicable supply contract or, in the absence of separate license terms and conditions, by the General License Conditions of Vaisala Group. - Page 14 User's Guide _______________________________________________________________________ This page intentionally left blank. 14 ___________________________________________________________________ M210619EN-E...
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Page 15: Chapter 2 Product Overview
Chapter 2 ___________________________________________________________ Product Overview CHAPTER 2 PRODUCT OVERVIEW This chapter introduces the features, advantages, and the product nomenclature. Introduction to HMT310 ® The Vaisala HUMICAP Humidity and Temperature Transmitter HMT310 is a small size humidity and temperature transmitter that powers up with 10 ... -
Page 16: Output Quantities
User's Guide _______________________________________________________________________ Output Quantities Table 3 HMT310 Output Quantities Quantity Abbreviation Metric Unit Nonmetric Unit Relative humidity Temperature °C °F Dewpoint/Frostpoint °C °F Dewpoint °C °F Absolute humidity gr/ft Mixing ratio g/kg gr/lb Wet bulb temperature °C °F Humid air volume/ dry air PPM (parts per volume million) -
Page 17: Hmt310 Transmitter Parts
Chapter 2 ___________________________________________________________ Product Overview HMT310 Transmitter Parts 1403-180 Figure 1 HMT310 Transmitter Parts The following numbers refer to Figure 1 above: 1 = Transmitter unit 2 = Mounting plate (smaller mounting plate also available) 3 = Connector for signal output and power supply. Available with female connector with 5 m cable or screw terminal connector. -
Page 18: Probe Options
User's Guide _______________________________________________________________________ Probe Options 0507-033 Figure 2 HMT310 Probes The following numbers refer to Figure 2 above: 1 = HMT311 for wall mounting 2 = HMT313 for general use 3 = HMT314 for pressurized spaces up to 100 bar 4 = HMT315 for high temperatures up to 180 °C (242 mm probe length, vapor-tight) 5 = HMT317 for demanding processes (warmed and vapor-tight... -
Page 19: Filter Options
Chapter 2 ___________________________________________________________ Product Overview Filter Options There are several filter types for HMT310. All filters are 12 mm in diameter with a female thread, and are compatible with all HMT310 probe models. The filters recommended for a probe type can be selected on the corresponding HMT310 order form. - Page 20 User's Guide _______________________________________________________________________ This page intentionally left blank. 20 ___________________________________________________________________ M210619EN-E...
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Page 21: Chapter 3 Installation
Chapter 3 ________________________________________________________________ Installation CHAPTER 3 INSTALLATION This chapter provides you with information that is intended to help you install the HMT310. Measuring at Overpressure HMT314 and HMT318 are designed for humidity measurement at overpressure. The maximum measurement pressures depend on the probe as follows: - HMT314: 0 ... -
Page 22: Mounting The Transmitter/Removing The Transmitter Unit
User's Guide _______________________________________________________________________ Mounting the Transmitter/Removing the Transmitter Unit Select a place with stable conditions for mounting the transmitter. Do not expose the transmitter to direct sunlight or rain. Always mount the transmitter housing with the cable bushings pointing downwards. NOTE If the transmitter is mounted outdoors cover it with a shelter (purchased by customer). -
Page 23: Figure 4 Mounting Plate Dimensions
Chapter 3 ________________________________________________________________ Installation 0507-035 Figure 4 Mounting Plate Dimensions The following letters refer to Figure 4 above: A = Larger mounting plate dimensions B = Smaller mounting plate dimensions VAISALA ________________________________________________________________________ 23... -
Page 24: Mounting The Transmitter With Optional Rain Shield
User's Guide _______________________________________________________________________ Mounting the Transmitter with Optional Rain Shield If you mount HMT310 outdoors, use a shelter to protect the transmitter. An HMT310 rain shield is available from Vaisala as an optional accessory (order code ASM211103). NOTE Vaisala does not recommend installing the transmitter outdoors with the smaller mounting plate (without flanges). -
Page 25: Mounting The Probes
Chapter 3 ________________________________________________________________ Installation Mounting the Probes Do not unsolder and then again resolder the probe cable from the mother board during installation; this may alter the humidity calibration of the transmitter. Beware of Temperature Differences In humidity measurement and especially in calibration it is essential that the temperature of the probe and the measuring environment is the same. -
Page 26: General Instructions For Probes With Cable
User's Guide _______________________________________________________________________ General Instructions for Probes with Cable It is recommended that the probes with a cable are mounted with the probe horizontal; this way, any water condensing on the tube cannot flow onto the sensor. 0507-024 Figure 7 Horizontal Mounting of Probe The following numbers refer to Figure 7 above: 1 = To be sealed... -
Page 27: Hmt313 For General Use
Chapter 3 ________________________________________________________________ Installation 0507-022 Figure 8 Vertical Mounting of Probe The following numbers refer to Figure 8 above: 1 = To be sealed 2 = Insulate the cable 3 = To be insulated 4 = Let the cable hang loosely. This prevents condensed water running to the sensor along the cable. -
Page 28: Hmt314 For Pressurized Spaces
User's Guide _______________________________________________________________________ See Appendix A on page 99 for the following probe installation kits for HMT313 and installation examples: - Duct mounting kit - Cable gland HMT314 for Pressurized Spaces HMT314 probe is for humidity measurements in pressurized rooms and industrial processes. -
Page 29: Hmt315 For High Temperatures
Chapter 3 ________________________________________________________________ Installation Mark both the fitting screw and the nut hex. Tighten the nut a further 30° (1/12 turn) or if you have a torque wrench tighten it with a torque of 80 ± 10 Nm (60 ± 7 ft-lbs). 0505-273 Figure 10 Marking the Nut... -
Page 30: Hmt317 For Demanding Processes
User's Guide _______________________________________________________________________ HMT317 for Demanding Processes The HMT317 is for environments where relative humidity is very high, near saturation. The warmed probe prevents the saturation of the sensor. See Appendix A on page 99 for a presentation of the following probe installation kits for HMT317 with installation examples: - Duct mounting kit - Cable gland... -
Page 31: Tightening The Clasp Nut
Chapter 3 ________________________________________________________________ Installation The following two fitting body options are available: - Fitting Body ISO1/2 solid structure - Fitting Body NPT1/2 solid structure Table 4 HMT318 Probe Dimensions Probe Type Probe Dimension Adjustment Range Standard 178 mm 120 mm Optional 400 mm 340 mm... -
Page 32: Figure 13 Tightening The Clasp Nut
User's Guide _______________________________________________________________________ 0505-276 Figure 13 Tightening the Clasp Nut The following numbers refer to Figure 13 above: 1 = Probe 2 = Clasp nut 3 = Fitting screw 4 = Pen (for marking) NOTE Take care not to overtighten the clasp nut to avoid difficulties when opening it. -
Page 33: Connections
Chapter 3 ________________________________________________________________ Installation Connections When the HMT310 leaves the factory, the measurement ranges, output scaling and quantities have already been set according to the customer order. The unit is calibrated at the factory and ready for use. The transmitter is delivered with either a screw terminal connector or with a detachable 5m cable with eight wires for serial port, analog outputs and 10 …... -
Page 34: Power Supply Requirements
User's Guide _______________________________________________________________________ Power Supply Requirements The supply voltage requirements depend on the output type, used functionalities and pressure: - RS-232 output (without heating and purge): 10 ... 35 VDC. - Analog output: 15 … 35 VDC - Heating and purge: 15 ... 35 VDC. - Pressures above 10 bara (145 psia): minimum 24 VDC Table 5 below lists the HMT310 current consumption for different output types and functions. -
Page 35: Chapter 4 Operation
Chapter 4 _________________________________________________________________ Operation CHAPTER 4 OPERATION This chapter contains information that is needed to operate the HMT310. Power Supply Use a 10 … 35 VDC power supply (required minimum voltage varies depending on the operating environment, functions and output type). For instructions on selecting the correct operating voltage, see section Power Supply Requirements on page 34. -
Page 36: Serial Line And Analog Communication Options
User's Guide _______________________________________________________________________ Serial Line and Analog Communication Options HMT310 measurement data can be accessed with the following serial or analog options: - RS-232 serial port connection to a computer - Analog output (current or voltage) For temporary access, you can also connect to the transmitter with the following: - USB connection to a computer using an optional USB cable (order code 238607). -
Page 37: Usb Connection
Chapter 4 _________________________________________________________________ Operation USB Connection When performing temporary checks or adjustments, HMT310 can be connected to a computer by using a USB cable (238607). The USB cable is an optional accessory: for more information on ordering optional items, see section Spare Parts and Accessories on page 93. NOTE Before starting to use the USB cable, you must install the USB cable driver (requires Windows). -
Page 38: Connection To An Mi70 Hand-Held Indicator
User's Guide _______________________________________________________________________ Connection to an MI70 Hand-held Indicator HMT310 can be connected to the hand-held MI70 indicator by using the MI70 connection cable (DRW216050SP). The MI70 connection cable is an optional accessory: for more information on ordering optional items, see section Spare Parts and Accessories on page 93. -
Page 39: Terminal Program Settings
Chapter 4 _________________________________________________________________ Operation Terminal Program Settings The instructions below describe how to connect to the HMT310 using the PuTTY terminal application for Windows (available for download at www.vaisala.com). Perform the necessary cabling and configuration of the transmitter before following the instructions. Opening a Serial/USB Connection with PuTTY Power up the HMT310 and start the PuTTY application. -
Page 40: 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 41: Table 8 Other Commands
Chapter 4 _________________________________________________________________ Operation Table 8 Other Commands Command Description Check transmitter settings Check transmitter settings in POLL mode ECHO [ON/OFF] Serial bus echo FIND All devices in POLL mode send their addresses HELP List commands PRES Set ambient pressure for calculations (non- volatile) XPRES Set ambient pressure for calculations... -
Page 42: Measurement Output
User's Guide _______________________________________________________________________ Measurement Output Start Continuous Outputting Syntax: R<cr> Starts output of measurements to the peripheral devices (RUN mode); the only command that can be used is S (stop). The output mode can be changed with the FORM command. Example: >r RH= 28.0 %RH T= 23.3 'C... -
Page 43: Output Reading Once
Chapter 4 _________________________________________________________________ Operation Output Reading Once Syntax in STOP mode: SEND<cr> Syntax in POLL mode: SEND aa<cr> Where aa = Address of the transmitter when more than one transmitter is connected to a serial bus (0 ... 99). Set Serial Interface Mode Syntax: SMODE x<cr>... -
Page 44: Set Transmitter Address For Use In Poll Mode
User's Guide _______________________________________________________________________ Example: >seri o changing parity only 4800 o 7 1 >seri 600 n 8 1 changing all parameters 600 n 8 1 Set Transmitter Address for Use in POLL Mode Syntax: ADDR aa<cr> Where Address (0 ... 99) Example: >addr Address... -
Page 45: Set Transmitter In Poll Mode
Chapter 4 _________________________________________________________________ Operation Set Transmitter in POLL Mode Syntax: CLOSE<cr> In STOP mode: the command OPEN has no effect, CLOSE sets the transmitter temporarily in POLL mode. In POLL mode: the command OPEN sets the transmitter temporarily in STOP mode, CLOSE returns the instrument to POLL mode. Example: Relative humidity calibration is performed at transmitter 2, which is in POLL mode. -
Page 46: Table 13 Quantity Abbreviations For Form Command
User's Guide _______________________________________________________________________ Table 13 Quantity Abbreviations for FORM Command Abbreviation Quantity Relative humidity Temperature Dewpoint/Frostpoint Dewpoint Absolute humidity Mixing ratio Wet bulb temperature Humid air volume/dry air volume Water vapor pressure Saturation water vapor pressure Enthalpy NOTE Only quantities selected when ordering the device can be selected for an output quantity. -
Page 47: Set Time And Date
Chapter 4 _________________________________________________________________ Operation Set Time and Date Syntax: TIME<cr> Syntax: DATE<cr> Sets the time and date to the transmitter. Example: >time Current time is 04:12:39 Enter new time (hh:mm:ss) ? 12:24:00 >date Current date is 2000-01-01 Enter new date (yyyy-mm-dd) ? 2004-06-30 >... -
Page 48: Select Metric Or Nonmetric Output Units
User's Guide _______________________________________________________________________ Select Metric or Nonmetric Output Units Syntax: UNIT x<cr> Where x = M or N M = metric units N = nonmetric units Table 15 Output Quantities and their Metric and Nonmetric Units Quantity Metric Unit Nonmetric Unit RH Relative Humidity T Temperature °C... -
Page 49: Output State Of Chemical Purge Or Sensor Heating (With Send And R Commands)
Chapter 4 _________________________________________________________________ Operation Output State of Chemical Purge or Sensor Heating (with SEND and R Commands) Syntax: FST x<cr> Where x = ON/OFF (default = OFF) Example: >fst on Form. status : ON >send 0 RH= 40.1 %RH T= 24.0 'C Td= 9.7 'C Tdf= 9.7 'C a= 8.7 g/m3... -
Page 50: Other Commands
User's Guide _______________________________________________________________________ Other Commands Check Transmitter Settings Syntax: ?<cr> Syntax: ??<cr> Use the command ? to check the current transmitter configuration. The command ?? is similar but can also be used if the transmitter is in POLL state. Example (factory default settings): >? HMT310 / 1.07 PRB serial nr... -
Page 51: All Devices In Poll Mode Send Their Addresses
Chapter 4 _________________________________________________________________ Operation All Devices in POLL Mode Send Their Addresses Syntax: FIND<cr> List Commands Syntax: HELP<cr> Set Ambient Pressure for Calculations Syntax: PRES aaaa.a<cr> Syntax: XPRES aaaa.a<cr> Where aaaa.a = Absolute pressure (hPa) The XPRES command should be used if the value is changed frequently. Its value is not retained at reset, and when set to 0, the value set with the PRES command is used. -
Page 52: Set Result Filtering
User's Guide _______________________________________________________________________ Table 16 Pressure Conversion Chart mmHg FROM inHg mbar Torr 1.333224 33.86388 1013.25 1000 68.94757 mbar mmHg 0.7500617 25.40000 750.0617 51.71493 Torr inHg 0.02952999 0.03937008 29.921 29.52999 2.036021 0.00098692 0.00131597 0.033422 0.98692 0.068046 0.001 0.001333224 0.03386388 1.01325 1 0.06894757 0.01450377 0.01933678... -
Page 53: Reset Transmitter
Chapter 4 _________________________________________________________________ Operation Reset Transmitter Syntax: RESET<cr> This command resets the device, resulting in a short start-up delay. The serial interface mode (STOP, RUN or POLL) selected with the SMODE command is taken into use at restart. Display Error Messages Syntax: ERRS<cr>... -
Page 54: Setting, Scaling And Testing Analog Outputs
User's Guide _______________________________________________________________________ Setting, Scaling and Testing Analog Outputs Set Analog Output Mode Syntax: AMODE ch1 ch2<cr> Where ch1 and ch2 I0 = 0 ... 20 mA I1 = 4 ... 20 mA U1 = 0 … 5 V * U2 = 0 …... -
Page 55: Scale Analog Outputs
Chapter 4 _________________________________________________________________ Operation Table 17 Output Quantities and their Metric and Nonmetric Units Quantity Metric Unit Nonmetric Unit RH Relative Humidity T Temperature °C °F TDF Dewpoint/frostpoint °C °F TD Dewpoint °C °F A Absolute humidity gr/ft X Mixing ratio g/kg gr/lb TW Wet bulb temperature... -
Page 56: Test Analog Outputs
User's Guide _______________________________________________________________________ Test Analog Outputs Syntax: ITEST aa.aaa bb.bbb<cr> The operation of the analog outputs is tested by forcing the outputs to given values. The values in the analog outputs can then be measured with a current/voltage meter. Where aa.aaa Current/voltage value to be set for channel 1 bb.bbb... -
Page 57: Set Error Outputs
Chapter 4 _________________________________________________________________ Operation Set Error Outputs Syntax: AERR<cr> The factory default state for analog outputs during error condition is 0 mA. Be careful when selecting the new error value, the error state of the transmitter should not cause problems in process monitoring. Example: >aerr Ch1 error out... -
Page 58: Automatic/Manual Chemical Purge
User's Guide _______________________________________________________________________ NOTE Using purge is not recommended when the transmitter is powered with USB. For information on HMT310 operating voltages, see section Power Supply Requirements on page 34. Calibration values Chemical purge Measured values after chemical exposur e Humidity 0507-056 Figure 16... -
Page 59: Automatic Chemical Purge Settings
Chapter 4 _________________________________________________________________ Operation Automatic Chemical Purge Settings Turn ON/OFF Automatic Chemical Purge This command enables or disables automatic chemical purge. Syntax: PUR x<cr> Where x = ON/OFF Example: >pur off Chemical Purge : OFF >pur on Chemical Purge : ON >... -
Page 60: Chemical Purge In Powerup
User's Guide _______________________________________________________________________ NOTE To activate the new interval setting immediately, reset the transmitter. Chemical Purge in Powerup This command enables or disables the function which turns on chemical purge within 10 seconds from the powerup of the device. Syntax: PURR x<cr> Where x = ON/OFF (default = OFF) NOTE... -
Page 61: Sensor Heating (Optional)
Chapter 4 _________________________________________________________________ Operation The prompt ">" appears when the heating period is over. However, the transmitter outputs are locked to values measured before chemical purge until the settling time is over. Sensor Heating (Optional) General This function is optionally available only in transmitters with ®... -
Page 62: Setting Humidity Sensor Heating
User's Guide _______________________________________________________________________ Setting Humidity Sensor Heating When HMT310 leaves the factory the sensor heating follows the factory default values. You can enable or disable the function, change the RH limit and define the heating temperature and duration of the heating period. - Page 63 Chapter 4 _________________________________________________________________ Operation Example: >xheat Extra heat : OFF : 95 ? 90 Extra heat RH Extra heat temp: 100 ? 85 Extra heat time: 30 ? 10 >xheat on Extra heat : ON > VAISALA ________________________________________________________________________ 63...
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Page 65: Chapter 5 Maintenance
Chapter 5 _______________________________________________________________ Maintenance CHAPTER 5 MAINTENANCE This chapter provides information that is needed in basic maintenance of the HMT310. Periodic Maintenance Calibration Interval HMT310 is fully calibrated and adjusted as shipped from factory. Typical calibration interval is one year. In certain applications it may be advisable to do more frequent checks. -
Page 66: Changing The Sensor
User's Guide _______________________________________________________________________ When replacing the filter, wear clean gloves to avoid depositing dirt or oil on the filter. Replace the filter as follows: Turn the filter counterclockwise until it is loose. Pull the filter straight out carefully. Do not damage the sensor. Take the new filter, and insert it to the filter thread. -
Page 67: Technical Support
Chapter 5 _______________________________________________________________ Maintenance 0508-079 Figure 17 Changing the Sensor The following numbers refer to Figure 17 above: Pull out the sensor Plastic socket 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... - Page 68 User's Guide _______________________________________________________________________ This page intentionally left blank. 68 ___________________________________________________________________ M210619EN-E...
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Page 69: Calibration And Adjustment
Chapter 6 ___________________________________________________ Calibration and Adjustment CHAPTER 6 CALIBRATION AND ADJUSTMENT This chapter describes the relative humidity and temperature adjustment procedures. Note that after adjustment, the original calibration certificate shipped with the product is not valid anymore. Vaisala recommends using the calibration services offered by Vaisala. Vaisala Service Centers perform calibrations and adjustments as well as repair and spare part services, and offer accredited calibrations and maintenance contracts. -
Page 70: Calibration And Adjustment Commands
User's Guide _______________________________________________________________________ Calibration and Adjustment Commands Revert to Factory Calibration Syntax: LI<cr> This command reverts only the CRH calibration (see calibration instructions, starting on page 73). Remove the transmitter unit from the mounting plate (see Mounting the Transmitter/Removing the Transmitter Unit on page 22) and press the adjustment button once (see Figure 18 on page 74). -
Page 71: Relative Humidity Calibration After Sensor Change
Chapter 6 ___________________________________________________ Calibration and Adjustment Relative Humidity Calibration after Sensor Change Syntax: FCRH<cr> The transmitter asks and measures relative humidity and calculates the calibration coefficients. This two-point adjustment needs to be performed after a sensor change. Follow the more detailed calibration instructions on page 73, but instead of the CRH command, use the FCRH command. -
Page 72: Set Calibration Date
User's Guide _______________________________________________________________________ Set Calibration Date Syntax: CDATE yyyy mm dd<cr> Remove the transmitter unit from the mounting plate (see Mounting the Transmitter/Removing the Transmitter Unit on page 22) and press the adjustment button once (see Figure 18 on page 74). -
Page 73: Multipoint Relative Humidity Adjustment
Chapter 6 ___________________________________________________ Calibration and Adjustment Multipoint Relative Humidity Adjustment Syntax: MPC [quantity] [function]<cr> where quantity = Quantity to be adjusted. The only available quantity is function = Desired function. The options are: ON – Enable multipoint correction. OFF – Disable multipoint correction. LIST –... -
Page 74: Low End Adjustment
User's Guide _______________________________________________________________________ 0507-048 Figure 18 Location of Adjustment Button NOTE With a warmed probe (HMT317) or sensor heating, heating is interrupted when the adjustment button is pressed. Allow enough time for the probe to reach ambient temperature and then start the calibration procedure. Low End Adjustment Remove the transmitter unit from the mounting plate (see Mounting the Transmitter/Removing the Transmitter Unit on page... -
Page 75: High End Adjustment
Chapter 6 ___________________________________________________ Calibration and Adjustment High End Adjustment After the low end adjustment, insert the probe into the measurement hole of the high end reference chamber (for example, NaCl: 75 % RH chamber in the humidity calibrator HMK15, use the adapter fitting 13.5 mm for HMT314, HMT315, HMT317, and HMT318). -
Page 76: Temperature Calibration And Adjustment (In One Point)
User's Guide _______________________________________________________________________ Temperature Calibration and Adjustment (in One Point) Remove the transmitter unit from the mounting plate (see Mounting the Transmitter/Removing the Transmitter Unit on page 22) and press the adjustment button once (see Figure 18 on page 74). Remove the probe filter (see instructions on page 65) and insert the probe into the reference temperature. -
Page 77: Humidity Calibration And Adjustment (In One Point)
Chapter 6 ___________________________________________________ Calibration and Adjustment Humidity Calibration and Adjustment (in One Point) Remove the transmitter unit from the mounting plate (see Mounting the Transmitter/Removing the Transmitter Unit on page 22) and press the adjustment button once (see Figure 18 on page 74). -
Page 78: Multipoint Adjustment Using Serial Line
User's Guide _______________________________________________________________________ Multipoint Adjustment Using Serial Line You can use the MPC command (applicable from software version 2.0.1 onward) to perform a multipoint adjustment to the relative humidity ® measurement. Due to the linear response of the HUMICAP sensor, it is recommended to use the standard two-point adjustments. -
Page 79: Example Multipoint Adjustment Procedure
Chapter 6 ___________________________________________________ Calibration and Adjustment Example Multipoint Adjustment Procedure Connect the HMT310 to a computer (see section Serial Line and Analog Communication Options on page 36). Open a terminal program. Issue the PURGE command to carry out the chemical purge, and wait for six minutes for it to complete. - Page 80 User's Guide _______________________________________________________________________ To start, remove the filter from the probe and insert the probe into a measurement hole of the driest reference chamber you intend to use. Proceed from low to high humidity. Remember to allow at least 30 minutes for the sensor to stabilize at each point. Once you have completed the list, remove the probe from the last measurement chamber and re-attach the filter.
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Page 81: Adjustment Using An Mi70 Indicator
Chapter 6 ___________________________________________________ Calibration and Adjustment Adjustment Using an MI70 Indicator You can use the MI70 handheld indicator to adjust the following in HMT310: - Temperature (T) - Relative humidity (RH) - Pressure compensation value for humidity measurement (environment settings) Note that starting the calibration in MI70 requires pressing the adjustment button on the HMT310 board. -
Page 82: Adjusting Rh With Mi70
User's Guide _______________________________________________________________________ Adjusting RH with MI70 Selecting RH in the main adjustment menu brings up a notification about checking environment settings. Select YES to access the environment settings before performing the RH adjustment, or NO to continue to RH adjustment without changing the current environment settings. -
Page 83: Licl - Nacl Automatic Adjustment
Chapter 6 ___________________________________________________ Calibration and Adjustment Press to quit the adjustment mode and return to the basic MI70 EXIT view. LiCl – NaCl automatic adjustment LiCl-NaCl automatic adjustment is a two-point adjustment in reference humidities of 11.3 % (LiCl) and 75 % (NaCl). You do not have to enter the reference values, the MI70 displays the accurate value based on the measured temperature and the Greenspan table stored into the memory of the MI70. -
Page 84: 1-Point T Adjustment
User's Guide _______________________________________________________________________ 1-point T adjustment Select 1-point adjustment in the T adjustment menu and follow the steps below: Set the probe to a reference temperature. You can follow the stabilization from the display. Press when the GRAPH READY reading is stabilized. Give the reference temperature by using the arrow buttons and press To confirm the adjustment, press... -
Page 85: Environment Settings
Chapter 6 ___________________________________________________ Calibration and Adjustment Environment Settings When you select RH adjustment for the first time from the adjustment main menu, MI70 asks if you want to check the environment settings (pressure compensation value for humidity measurement). If you need to access the environment settings after this, exit the adjustment mode by selecting EXIT in the main adjustment menu and navigate to the environment menu from the MI70 main menu. - Page 86 User's Guide _______________________________________________________________________ This page intentionally left blank. 86 ___________________________________________________________________ M210619EN-E...
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Page 87: Technical Data
Chapter 7 _____________________________________________________________ Technical Data CHAPTER 7 TECHNICAL DATA This chapter provides the technical data of the HMT310. Specifications Table 19 Relative Humidity Specifications Property Description / Value Measuring range 0 ... 100 %RH Sensor ® Vaisala HUMICAP 180R for typical applications ®... -
Page 88: Figure 19 Accuracy Over Temperature Range
User's Guide _______________________________________________________________________ Table 20 Temperature Specifications and Operating Pressure Ranges Property Description / Value HMT311 -40 ... +60 °C (-40 ... +140 °F) HMT313 80 °C -40 ... +80 °C (-40 ... +176 °F) HMT313 120 °C -40 ... +120 °C (-40 ... +248 °F) HMT314 -70 ... -
Page 89: Table 21 Electrical Connections
Chapter 7 _____________________________________________________________ Technical Data Table 21 Electrical Connections Property Description / Value Two analog outputs: Current: 0…20 mA or 4…20 mA selectable and scalable Voltage: 0 … 5 V, or 0 … 10 V (1 ... 5 V available through scaling) Typical analog output accuracy at +20 °C ±0.05% of full scale Typical temperature dependence of 0.005%/°C (0.003%/°F) of full scale... -
Page 90: Calculated Variables
User's Guide _______________________________________________________________________ Calculated Variables Table 23 Calculated Variables (Typical Ranges) Variable HMT331 Probe HMT333 Probe HMT334/335/337/338 Probes Dewpoint temperature -20 ... +60 ºC -20 ... +80 ºC -20 ... +100 ºC Mixing ratio 0 ... 160 g/kg dry air 0 ... -
Page 91: Accuracy Of Wet Bulb Temperature °C
Chapter 7 _____________________________________________________________ Technical Data Accuracy of Wet Bulb Temperature °C Relative humidity Temp. 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 — — 0.21 0.21 0.22 0.22 0.22 0.22 0.23 0.23 — — 0.27 0.28 0.28 0.29 0.29 0.29 0.30 0.30 0.31... -
Page 92: Dewpoint Temperature
User's Guide _______________________________________________________________________ Dewpoint Temperature Find the intersection of the dewpoint temperature curve and the dewpoint difference reading (process temperature-dewpoint temperature) on the x- axis and read the accuracy in dewpoint measurement on the y-axis. 0508-017 Figure 20 Accuracy in Dewpoint Measurement (°C) 92 ___________________________________________________________________ M210619EN-E... -
Page 93: Spare Parts And Accessories
Chapter 7 _____________________________________________________________ Technical Data Spare Parts and Accessories Information on spare parts, accessories, and calibration products is available online at www.vaisala.com and store.vaisala.com. Table 24 Spare Parts and Accessories Description Order Code Probe accessories PPS Plastic Grid with Stainless Steel Netting DRW010281SP PPS Plastic Grid Filter DRW010276SP... -
Page 94: Dimensions In Mm (Inches)
User's Guide _______________________________________________________________________ Dimensions in mm (inches) Transmitter Enclosure and Mounting Plate Dimensions 0507-049 Figure 21 Transmitter Enclosure and Mounting Plate Dimensions The following numbers refer to Figure 21 above. Mounting plate alternatives: 1 = Wall Plate/Cover, bigger plate with flange 2 = Wall Plate/Cover, smaller plate with no flange 94 ___________________________________________________________________ M210619EN-E... -
Page 95: Rain Shield Dimensions
Chapter 7 _____________________________________________________________ Technical Data Rain Shield Dimensions 1311-252 Figure 22 Rain Shield Dimensions (Back) 1311-253 Figure 23 Rain Shield Dimensions (Side and Outer) VAISALA ________________________________________________________________________ 95... -
Page 96: Probe Dimensions
User's Guide _______________________________________________________________________ Probe Dimensions HMT311 12 (0.47) 0507-050 Figure 24 Probe Dimensions HMT313 0508-008 Figure 25 HMT313 Dimensions 96 ___________________________________________________________________ M210619EN-E... -
Page 97: Hmt314
Chapter 7 _____________________________________________________________ Technical Data HMT314 0507-052 Figure 26 HMT314 Dimensions HMT315 41 (1.61) (1.06) 2 (0.08) 192 (7.56) 242 (9.53) 0507-053 Figure 27 HMT315 Dimensions Flange for HMT315 available as an option VAISALA ________________________________________________________________________ 97... -
Page 98: Hmt317
User's Guide _______________________________________________________________________ HMT317 0508-009 Figure 28 HMT317 Dimensions HMT318 0508-078 Figure 29 HMT318 Dimensions 98 ___________________________________________________________________ M210619EN-E... -
Page 99: Probe Installation Kits And Installation Examples
Appendix A ____________________ PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES APPENDIX A PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES This appendix describes the available probe installation kits and provides some installation examples. Duct Installation Kits (for HMT313/317/315) Duct installation kit includes a flange, a sealing ring, a supporting bar and probe attaching part for the probe and screws for attaching the flange to the duct wall. -
Page 100: Pressure-Tight Swagelok Installation Kits (For Hmt317)
User's Guide _______________________________________________________________________ Pressure-Tight Swagelok Installation Kits (for HMT317) RH Probe Installation 0508-032 Figure 31 Swagelok Installation Kit for RH Probe The following numbers refer to Figure 31 above: 1 = Relative humidity probe 2 = Duct connector 3 = ISO3/8" or NPT1/2" thread 4 = Swagelok connector 5 = Ferrules 100 __________________________________________________________________ M210619EN-E... -
Page 101: Examples Of Vapor-Tight Installations With Cable Gland
Appendix A ____________________ PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES Examples of Vapor-Tight Installations with Cable Gland RH Probe Installations (for HMT313/317) 0508-026 Figure 32 Cable Installation with Cable Gland AGRO The following numbers refer to Figure 32 above: 1 = Nut (to be tightened to the body) 2 = Seal 3 = Body and O-ring Vaisala order code for the cable gland: HMP247CG (see section Spare... -
Page 102: Ball Valve Installation Kit For Hmt318
User's Guide _______________________________________________________________________ 0508-027 Figure 33 Probe Installation with Cable Gland The following numbers refer to Figure 33 above: 1 = Cable gland AGRO 1160.20.145 (T = -40 ... +100 °C) (not available from Vaisala) 2 = In pressurized conditions, use a locking ring (for example, 11x 1 DIN471) The installation option in Figure 33 above is not available from Vaisala and is presented here only as an example of how to achieve a vapor-tight... -
Page 103: Figure 34 Hmt318 Ball Valve Assembly Installation
Appendix A ____________________ PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES 0507-043 Figure 34 HMT318 Ball Valve Assembly Installation The following numbers refer to Figure 34 above: 1 = Manual press tool 2 = Handle of the ball valve 3 = Probe 4 = Process chamber or pipeline 5 = Groove on the probe indicates the upper adjustment limit 6 = Filter... - Page 104 User's Guide _______________________________________________________________________ Follow the steps below to install the HMT318 probe through a ball valve assembly. After the installation, the probe should be sitting in the process chamber or pipeline as shown in Figure 34 on page 103. Shut down the process if the process pressure is more than 10 bars. If the pressure is lower there is no need to shut down the process.
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