USER'S GUIDE ® Vaisala HUMICAP Humidity and Temperature Transmitter HMT310 M210619EN-D
PUBLISHED BY Vaisala Oyj P.O. Box 26 FI-00421 Helsinki Finland Phone (int.): +358 9 8949 1 Fax: +358 9 8949 2227 Visit our Internet pages at http://www.vaisala.com/ © Vaisala 2009 No part of this manual may be reproduced in any form or by any means, electronic or mechanical (including photocopying), nor may its contents be communicated to a third party without prior written permission of the copyright holder. The contents are subject to change without prior notice.
________________________________________________________________________________ Table of Contents CHAPTER 1 GENERAL INFORMATION............................................................................ 9 About This Manual ................................................................... 9 Contents of This Manual ....................................................... 9 Version Information ............................................................. 10 General Safety Considerations ..................
USER'S GUIDE____________________________________________________________________ Entering Serial Communication Parameters .......................35 List of Commands ..................................................................37 Measurement Output..............................................................39 R Start Continuous Outputting ............................................39 S Stop Continuous Outputting.............................................
________________________________________________________________________________ Pressure Regulator Recommended ..................................... 61 CHAPTER 6 MAINTENANCE ........................................................................................... 63 Periodic Maintenance ............................................................ 63 Calibration Interval .............................................................. 63 Replacing Consumables................................................
USER'S GUIDE____________________________________________________________________ List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 HMT310 Components ..............................................................18 HMT310 Probes .........................
________________________________________________________________________________ List of Tables Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Manual Revisions ..................................................................... 10 HMT310 Output Quantities....................................................... 20 HMT318 Probe Dimensions .....................................................
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Chapter 1 ________________________________________________________ General Information 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 Humidity and Temperature Transmitter HMT310. Contents of This Manual This manual consists of the following chapters: - Chapter 1, General Information, provides general notes for the manual and the product.
USER'S GUIDE____________________________________________________________________ Version Information Table 1 Manual Revisions Manual Code M210619EN-A M210619EN-B M210619EN-C M210619EN-D Description June 2004 - First release. September 2005 September 2007 - Added HUMICAP® 180R and HUMICAP® 180RC as sensor options. November 2009 - Removed HUMICAP® 180, HUMICAP® 180C and HUMICAP® 180L2 from sensor options. Updated Technical Data of the product.
Chapter 1 ________________________________________________________ General Information Product Related Safety Precautions 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. CAUTION Do not modify the unit. Improper modification can damage the product or lead to malfunction.
USER'S GUIDE____________________________________________________________________ above is possible, touch a conductive part of the equipment chassis with your other hand before touching the boards. - Always hold the boards by the edges and avoid touching the component contacts. Recycling Recycle all applicable material. Dispose of batteries and the unit according to statutory regulations. Do not dispose of with regular household refuse.
Chapter 1 ________________________________________________________ General Information Emissions Test Radiated emissions Complies with Standard EN55022 / CISPR16/22 Class B Immunity Test Electrostatic discharge (ESD) Radiated immunity EFT burst (Electric fast transients) Surge Conducted immunity Complies with Standard EN/IEC 61000-4-2 criteria B EN/IEC 61000-4-3 criteria A EN/IEC 61000-4-4 criteria B EN/IEC 61000-4-5 criteria B EN/IEC 61000-4-6 criteria A Trademarks Vaisala Trademark is a registered tr
USER'S GUIDE____________________________________________________________________ performed Vaisala shall at its free option either repair or have repaired or replace the product in question. The working hours used by employees of Vaisala for such repair or replacement shall be free of charge to the client. This service warranty shall be valid for a period of six (6) months from the date the service measures were completed.
Chapter 1 ________________________________________________________ General Information cancelled and waived. Vaisala's liability shall under no cir-cumstances exceed the invoice price of any Product for which a warranty claim is made, nor shall Vaisala in any circumstances be liable for lost profits or other consequential loss whether direct or indirect or for special damages.
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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 12 ... 35 VDC. Output alternatives are analog outputs 0/4 ... 20 mA and an RS-232 serial line.
USER'S GUIDE____________________________________________________________________ Components 0507-032 Figure 1 HMT310 Components 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.
Chapter 2 __________________________________________________________ Product Overview Probe Options 0507-033 Figure 2 HMT310 Probes The following numbers refer to Figure 2 above: 1 2 3 4 = = = = HMT311 for wall mounting HMT313 for general use HMT314 for pressurized spaces up to 100 bar HMT315 for high temperatures up to 180 °C (242 mm long probe, vapor-tight) 5 = HMT317 for demanding processes (warmed and vapor-tight probe) 6 = HMT318 for pressurized pipelines (40 bar, ball valve) *) Flange for HMT31
USER'S GUIDE____________________________________________________________________ Output Quantities Table 2 HMT310 Output Quantities Quantity RH Relative humidity T Temperature TDF Dewpoint/Frostpoint TD Dewpoint A Absolute humidity X Mixing ratio TW Wet bulb temperature PPM Humid air volume/ dry air volume PW Water vapor pressure PWS Saturation water vapor pressure H Enthalpy NOTE Metric Unit %RH C C C g/m3 g/kg C Nonmetric Unit %RH F F F gr/ft3 gr/lb F ppm ppm hPa lb/in2 hPa lb/in2 kJ/
Chapter 3 _______________________________________________________________ Installation CHAPTER 3 INSTALLATION This chapter provides you with information that is intended to help you install this product. Selecting Location Finding a suitable site for the Humidity and Temperature Transmitter HMT310 is important for getting representative ambient measurements. The site should represent the general area of interest.
USER'S GUIDE____________________________________________________________________ 0507-034 Figure 3 Mounting with Mounting Plates The following letters and numbers refer to Figure 3 above: A = Mounting with larger mounting plate B = Mounting with smaller mounting plate 1 = Two Allen screws for fastening or removing the transmitter module (Allen key provided) 2 = Four screw holes (Ø 4.5 mm) for wall mounting (screws not provided) 3 = Two screw holes (Ø 6.
Chapter 3 _______________________________________________________________ Installation A B 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 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.
USER'S GUIDE____________________________________________________________________ 0507-036 Figure 5 Measurement Error at 100 %RH when Difference Between Ambient and Sensor Temperature is 1 °C 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.
Chapter 3 _______________________________________________________________ Installation also be allowed to hang loosely as this prevents any condensed water from running onto the probe along the cable. 0507-022 Figure 7 Vertical Mounting of Probe The following numbers refer to Figure 7 above: 1 2 3 4 NOTE = = = = To be sealed Insulate the cable To be insulated Let the cable hang loosely. This prevents condensed water running to the sensor along the cable.
USER'S GUIDE____________________________________________________________________ The HMT313 provides for two measuring range options. The first probe version is equipped with a flexible cable and can be used when measuring in environments up to 80 ºC. The second version is suitable for measuring in environments up to 120 ºC.
Chapter 3 _______________________________________________________________ Installation The following numbers refer to Figure 8 on page 26: 1 2 3 4 5 6 5. = = = = = = Tightening cone Nut Fitting screw Sealing washer Probe; Ø 12 mm M22×1.5 or NPT 1/2" Tighten the nut a further 30° (1/12 turn) or if you have a torque spanner tighten it with a torque of 80 ± 10 Nm (60 ± 7 ft-lbs). 0505-273 Figure 9 NOTE Marking the Nut After detachment the nut must be tightened without increased effort. 6.
USER'S GUIDE____________________________________________________________________ NOTE When HMT314 is installed in a process with pressure differing from normal atmospheric pressure, please enter the pressure value of the process (in hPa or mbar) into the transmitter memory via the serial line (see PRES Set Ambient Pressure for Calculations on page 48). HMT315 for High Temperatures HMT315 is installed similarly than the HMT313 probe but without the supporting bar.
Chapter 3 _______________________________________________________________ Installation HMT318 for Pressurized Pipelines Due to the sliding fit the HMT318 is easy to install into and remove from the pressurized process. The probe is especially suitable for the measurements in pipelines. See section Ball Valve Installation kit for HMT318 on page 84.
USER'S GUIDE____________________________________________________________________ 0507-025 Figure 11 Sealing of Fitting Body into Process Tightening the Clasp Nut 1. 2. 3. 4. Adjust the probe to a suitable depth according to the type of installation. Tighten the clasp nut first manually. Mark the fitting screw and the clasp nut. Tighten the nut a further 50 - 60º (ca. 1/6 turn) with a wrench. If you have suitable torque spanner, tighten the nut to max 45 ± 5 Nm (33 ± 4 ft-lbs).
Chapter 3 _______________________________________________________________ Installation The following numbers refer to Figure 12 on page 30: 1 2 3 4 = = = = Probe Clasp nut Pen Fitting screw NOTE Take care not to overtighten the clasp nut to avoid difficulties when opening it. CAUTION Take care not to damage the probe body. A damaged body makes the probe less tight and may prevent it from going through the clasp nut.
USER'S GUIDE____________________________________________________________________ Connections When HMT310 leaves the factory, its measurement ranges, output scaling and quantities have already been set according to order completed by the customer. The unit is calibrated at the factory and the device is ready for use. The transmitter is delivered with a screw terminal connector or with a detachable 5 m cable with eight wires for serial port, analog outputs and 24VDC power supply.
Chapter 3 _______________________________________________________________ Installation Screw Terminal Connector 0507-045 Figure 14 Screw Terminal Connector The following numbers refer to Figure 14 above: Color 1 White (WHT) 2 Brown (BRN) 3 Green (GRN) 4 Yellow (YEL) 5 Grey (GREY) 6 Pink (PINK) 7 Blue (BLU) 8 Red (RED) = = = = = = = = Function RS-232 TX RS-232 GND CH2+ CH1+ Supply-/CH1-/CH2 Supply+ RS-232 RX Not connected VAISALA _______________________________________________________________________
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Chapter 4 ________________________________________________________________ Operation CHAPTER 4 OPERATION This chapter contains information that is needed to operate Humidity Transmitter HMT310. Power ON/OFF Switch on the 24 VDC power supply and the transmitter wakes up. Entering Serial Communication Parameters The transmitter communicates via an RS-232 serial interface. The transmitter can be polled or set on RUN-mode with specific commands.
USER'S GUIDE____________________________________________________________________ Table 4 Entering Serial Parameters in Windows® 2000 and Windows NT® WINDOWS 2000 MENU Start Programs Accessories WHAT TO DO move the cursor to: move the cursor to: move the cursor to: WINDOWS NT MENU Start Programs Accessories WHAT TO DO move the cursor to: move the cursor to: move the cursor to: Communications HyperTerminal Hypertrm move the cursor to: click move the cursor to: double click Conne
Chapter 4 ________________________________________________________________ Operation 0507-046 Figure 15 HyperTerminal Settings in Windows® 2000 Environment List of Commands The text in BOLD letters in the [brackets] indicates the default setting. Issue the commands by typing them on your computer keyboard. stands for pressing Enter (on your computer keyboard). This section presents the command list, the commands are described in detail later in this chapter.
USER'S GUIDE____________________________________________________________________ Output formatting FORM TIME DATE FTIME [ON/OFF] FDATE [ON/OFF] UNIT FST [ON/OFF] Other commands ? ?? ECHO [ON/OFF] FIND HELP PRES XPRES FILT RESET ERRS Serial output format Set time Set date Add time to SEND and R outputs Add date to SEND and R outputs Select metric or nonmetric output units Output state of optional probe heating and chemical purge (with SEND and R commands) Check transmitter settings Check transmitter sett
Chapter 4 ________________________________________________________________ Operation Chemical purge PUR [ON/OFF] Enable or disable automatic chemical purge Activate chemical purge Enable or disable automatic chemical purge in power up PURGE PURR [ON/OFF] Sensor heating XHEAT [ON/OFF] Enable or disable sensor heating Measurement Output R Start Continuous Outputting Syntax: R Starts output of measurements to the peripheral devices (RUN-mode); the only command that can be used is S (stop).
USER'S GUIDE____________________________________________________________________ INTV Set Continuous Output Interval for RUN-Mode Syntax: INTV xxx yyy Where xxx yyy = = Output interval (0 ...
Chapter 4 ________________________________________________________________ Operation Example: >smode run Output mode : RUN >smode stop Output mode : STOP SERI Serial Line Settings Syntax: SERI b p d s Where b p d s = = = = bauds (300, 600, 1200, 2400, 4800, 9600,19200) parity (n = none, e = even, o = odd) data bits (7 or 8) stop bits (1 or 2) The settings can be changed one parameter at a time or all parameters at once: Example: >seri o 4800 o 7 1 >seri 600 n 8 1 600 n 8 1 changing
USER'S GUIDE____________________________________________________________________ OPEN Temporarily Open Transmitter from POLL-Mode to Receive Serial Commands Syntax: OPEN nn Where nn = Address of the transmitter (0 ... 99) The OPEN command sets the bus temporarily in STOP-mode so that the SMODE command can be issued.
Chapter 4 ________________________________________________________________ Operation Example: Relative humidity calibration is performed at transmitter 2, which is in POLL-mode. >open 2 Opens the line to transmitter 2. >crh Calibration started. ... >close Line closed. Output Formatting FORM Serial Output Format Syntax: FORM x Where x = Formatter string Command format can be used to change the format of the output commands SEND and R.
USER'S GUIDE____________________________________________________________________ Table 5 Quantity Abbreviations for FORM Command Abbreviation RH T TDF TD A X TW PPM PW PWS H NOTE 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 Only quantities selected when ordering the device can be selected for an output quantity. Table 6 Modifier x.
Chapter 4 ________________________________________________________________ Operation 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 > NOTE Time and date are cleared to 2000-01-01 00:00:00 at reset. NOTE Only about 1 % accuracy is obtained with the software clock.
USER'S GUIDE____________________________________________________________________ Table 7 Output Quantities and their Metric and Nonmetric Units Quantity RH Relative Humidity T Temperature TDF Dewpoint/frostpoint TD Dewpoint A Absolute humidity X Mixing ratio TW Wet bulb temperature PPM Humid air volume/dry air volume PW Water vapor pressure PWS Saturation water vapor pressure H Enthalpy Metric Unit %RH C C C g/m3 g/kg C Ppm hPa hPa kJ/kg Nonmetric Unit %RH F F F gr/ft3 gr/lb F ppm lb/in2 lb/in2
Chapter 4 ________________________________________________________________ Operation g/kg Tw= 15.7 'C ppm= 12084 pw= h= 43.5 kJ/kg > 12.10 hPa pws= 30.11 hPa For more information about chemical purge, see pages 54 through 57. For more information about sensor heating, see pages 57 through 59. 1 Letters and values indicating the state of the probe: N ... xxx → normal operation X ... xxx → sensor heating H ... xxx → chemical purge S ...
USER'S GUIDE____________________________________________________________________ Ch2 T Ch2 T > lo hi : : -40.00 'C 60.00 'C ECHO Serial Bus Echo Syntax: ECHO x Where x = ON/OFF (default = ON) The command enables or disables echo of characters received over the serial line. FIND All Devices in POLL-Mode Send Their Addresses Syntax: FIND HELP List Commands Syntax: HELP PRES Set Ambient Pressure for Calculations Syntax: PRES aaaa.a Syntax: XPRES aaaa.a Where aaaa.
Chapter 4 ________________________________________________________________ Operation Example: If gauge pressure is 1.4 bar, set pressure value 2.4 bar (= 2400 hPa) >pres 2400 Pressure : 2400 > Table 8 Pressure Conversion Chart TO hPa mbar mmHg Torr inHg atm bar psi 1 1.333224 33.86388 1013.25 1000 68.94757 0.7500617 1 25.40000 760 750.0617 51.71493 inHg 0.02952999 0.03937008 1 29.921 29.52999 2.036021 atm 0.00098692 0.00131597 0.033422 1 0.98692 0.068046 bar 0.
USER'S GUIDE____________________________________________________________________ FILT Set Result Filtering Syntax: FILT xx Enable or disable the filtering or select the extended filter to reduce noise of the measurement.
Chapter 4 ________________________________________________________________ Operation Setting, Scaling and Testing Analog Outputs AMODE Set Analog Outputs (0/4 ... 20 mA) Syntax: AMODE ch1 ch2 Where ch1 and ch2 = I0 = 0 ... 20 mA I1 = 4 ... 20 mA Example: >amode i1 i1 Ch1 output mode: 4...20mA Ch2 output mode: 4...20mA > ASEL Select Parameter for Analog Outputs Syntax: ASEL xxx yyy Where xxx yyy = = Quantity of channel 1 Quantity of channel 2 Use abbreviations shown in Table 9 on page 52.
USER'S GUIDE____________________________________________________________________ Table 9 Output Quantities and their Metric and Nonmetric Units Quantity RH Relative Humidity T Temperature TDF Dewpoint/frostpoint TD Dewpoint A Absolute humidity X Mixing ratio TW Wet bulb temperature PPM Humid air volume/dry air volume PW Water vapor pressure PWS Saturation water vapor pressure H Enthalpy NOTE Metric Unit %RH C C C g/m3 g/kg C Ppm Nonmetric Unit %RH F F F gr/ft3 gr/lb F ppm hPa hPa lb/in2 lb/i
Chapter 4 ________________________________________________________________ Operation ITEST Test Analog Outputs Syntax: ITEST aa.aaa bb.bbb The operation of the analog outputs are 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 bb.bbb = = Current value to be set for channel 1 Current value to be set for channel 2 Example: >itest 8 8.000mA 3F8 > 12 12.
USER'S GUIDE____________________________________________________________________ AERR Set Error Outputs Syntax: AERR Factory default state for analog outputs during error condition is 0 mA. Please 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 Ch2 error out : 0.000mA ? : 0.000mA ? NOTE Error output value needs to be within a valid range for output type.
Chapter 4 ________________________________________________________________ Operation Calibration values Chemical purge Output signal Measured values after chemical exposure Humidity 0507-056 Figure 16 Decrease of Sensor Gain Due to Interfering Chemical and Effect of Chemical Purge Process Automatic/Manual Chemical Purge When HMT310 leaves the factory the automatic chemical purge (if selected) takes place repeatedly with the time intervals set in the factory.
USER'S GUIDE____________________________________________________________________ Example: >pur off Chemical Purge : OFF >pur on Chemical Purge : ON > PUR Set Chemical Purge Interval If the sensor is exposed to chemicals it is recommended to have the chemical purge done at least once in 720 min (= 12 hours). In applications where the chemical exposure is not likely, the interval may be longer. It is not recommended to change the other parameters than interval.
Chapter 4 ________________________________________________________________ Operation NOTE When you enable this function, wait about 8 min after powerup before taking measurements. The powerup chemical purge locks the output values for the first operation minutes.
USER'S GUIDE____________________________________________________________________ The sensor heating is recommended for the high humidity environments where even a small temperature differences can cause water to condense on the sensor. The sensor heating speeds up the recovery of the humidity sensor from condensation. Sensor heating starts-up when the relative humidity of the measuring environment reaches the RH-value set by a user (RH-limit).
Chapter 4 ________________________________________________________________ Operation Setting Heating Parameters Whenever the RH value seen by the sensor exceeds the predefined RH limit the humidity sensor is warmed up to the predefined temperature. The duration of the heating can also be defined. After the heating cycle the humidity conditions are checked and a new sensor heating is activated if the predefined conditions are reached again. Syntax: XHEAT Type the values after the question mark.
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Chapter 5 __________________________________________________ Measuring at Overpressure CHAPTER 5 MEASURING AT OVERPRESSURE This chapter contains important information concerning the use of HMT310 in overpressure conditions. HMT314 and HMT318 are designed for humidity measurement at overpressure. The maximum measurement pressures depend on the probe as follows: - HMT314: 0 ...
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Chapter 6 ______________________________________________________________ Maintenance CHAPTER 6 MAINTENANCE This chapter provides information that is needed in basic maintenance of HMT310, and lists contact information for technical support and Vaisala Service Centers. 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.
USER'S GUIDE____________________________________________________________________ 1. 2. CAUTION Remove the filter from the probe. Remove the damaged sensor and insert a new one. Handle the new sensor by the plastic socket. Do not touch the sensor plate. 3. 4. After sensor change the humidity calibration must be made according to the instructions, see FCRH Relative Humidity Calibration after Sensor Change on page 68. Install a new filter on the probe.
Chapter 6 ______________________________________________________________ Maintenance Return Instructions If the product needs repair, please follow the instructions below to speed up the process and to avoid extra costs to you. 1. 2. Read the section Warranty on page 13. Contact a Vaisala Service Center or a local Vaisala representative. The latest contact information and instructions are available from www.vaisala.com.
USER'S GUIDE____________________________________________________________________ Vaisala Service Centers Vaisala Service Centers perform calibrations and adjustments as well as repair and spare part services. See contact information below. Vaisala Service Centers also offer accredited calibrations, maintenance contracts, and a calibration reminder program. Do not hesitate to contact them to get further information.
Chapter 7 ___________________________________________________Calibration and Adjustment CHAPTER 7 CALIBRATION AND ADJUSTMENT This chapter describes the relative humidity and temperature adjustment procedures. After adjustment, the original calibration certificate shipped with the product is not valid anymore. Calibration and Adjustment Commands LI Revert Factory Calibration Syntax: LI This command reverts only the CRH calibration (see calibration instructions, starting on page 69). 1. 2. 3.
USER'S GUIDE____________________________________________________________________ FCRH Relative Humidity Calibration after Sensor Change Syntax: FCRH 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 69, but instead of the CRH command, use the FRCH command. Example: >frch RH : 1.82 1.
Chapter 7 ___________________________________________________Calibration and Adjustment 2. 3. Issue command LI and enter value 0 for an offset value and value 1 for a gain value. Issue command CDATE and set the calibration date. Example: >cdate 2001 12 11 Calibration : 2001-12-11 > ACAL Analog Output Calibration Syntax: ACAL Connect the HMT310 to a multimeter in order to measure either current or voltage depending on the selected output type. Issue the ACAL command.
USER'S GUIDE____________________________________________________________________ 0507-048 Figure 17 NOTE Location of Adjustment Button If using a warmed probe (HMT317 option) or sensor heating function, the heating is interrupted when the adjustment button is pressed. Allow sufficient time for the probe to reach ambient temperature and then start the calibration procedure. Low End Adjustment 1. 2. 3. 4. 5.
Chapter 7 ___________________________________________________Calibration and Adjustment 6. When the reading is stabilized, type the reference humidity after the question mark and press Enter. >crh RH : 11.25 Ref1 ? c RH : 11.25 Ref1 ? c RH : 11.25 Ref1 ? c RH : 11.24 Ref1 ? c RH : 11.24 Ref1 ? 11.3 Press any key when ready ... Now the device is waiting for the high-end reference. High End Adjustment 7. 8. 9.
USER'S GUIDE____________________________________________________________________ Temperature Calibration and Adjustment (in One Point) 1. 2. 3. 4. 5. 6. Remove the transmitter unit from the mounting plate (see Mounting the Transmitter/Removing the Transmitter Unit on page 21) and press the adjustment button once (see Figure 17 on page 70). Remove the probe filter (see instructions on page 63) and insert the probe into the reference temperature. Let the sensor stabilize. Issue command CT and press Enter.
Chapter 8 ____________________________________________________________ Technical Data CHAPTER 8 TECHNICAL DATA This chapter provides the technical data of the product. Specifications Table 11 Relative Humidity Specifications Property Measuring range Accuracy (including nonlinearity, hysteresis and repeatability) with Vaisala HUMICAP®180R Vaisala HUMICAP®180RC at +15 ... 25 °C at -20 ... +40 °C at -40 ...
USER'S GUIDE____________________________________________________________________ Table 12 Temperature Specifications (and Operating Pressure Ranges) Property HMT311 HMT313 80 °C HMT313 120 °C HMT314 HMT315 (vapor tight) HMT317 (vapor tight) HMT318 Accuracy at +20 °C (+68 °F) Accuracy over temperature range Typical temperature dependence of electronics Temperature sensor Description / Value -40 ... +60 °C (-40 ... +140 °F) -40 ... +80 °C (-40 ... +176 °F) -40 ... +120 °C (-40 ... +248 °F) -70 ...
Chapter 8 ____________________________________________________________ Technical Data Table 13 Electronics Specifications Property Two analog outputs: selectable and scalable Typical accuracy of analog output at +20 °C Typical temperature dependence of analog output Serial output Cable feed through alternatives Operating voltage Power consumption Startup time after powerup External load Table 14 Description / Value 0…20 mA or 4…20 mA ±0.05% of full scale 0.005%/°C (0.
USER'S GUIDE____________________________________________________________________ Options and Accessories Table 15 Options and Accessories Description Probe accessories PPS Plastic Grid with Stainless Steel Netting PPS Plastic Grid Filter Sintered Filter AISI 316L Stainless Steel Filter Stainless Steel Filter with Membrane Sensors Vaisala HUMICAP®180R (general purpose) PT100 sensor Probe mounting accessories Fitting Body M22x1.
Chapter 8 ____________________________________________________________ Technical Data Dimensions in mm (inches) Transmitter Enclosure and Mounting Plates 1 2 0507-049 Figure 19 Transmitter Enclosure and Mounting Plate Dimensions The following numbers refer to Figure 19 above.
USER'S GUIDE____________________________________________________________________ Probes 120 (4.72) HMT311 12 (0.
Chapter 8 ____________________________________________________________ Technical Data HMT314 0507-052 Figure 22 HMT314 Dimensions 28 (1.10) *) 75 (2.95) 12 (0.47) 41 (1.61) 13.5 (0.53 HMT315 27 (1.06) 2 (0.08) 192 (7.56) 242 (9.
USER'S GUIDE____________________________________________________________________ HMT317 0508-009 Figure 24 HMT317 Dimensions HMT318 0508-078 Figure 25 HMT318 Dimensions 80 __________________________________________________________________ M210619EN-D
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.
USER'S GUIDE____________________________________________________________________ NOTE When the temperature difference between the duct and the air outside the duct is significant, the supporting bar must be installed as deep in the duct as possible. This helps to prevent errors caused by heat conduction in the bar and cable.
Appendix A ___________________ PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES Examples of Vapor-Tight Installations with Cable Gland RH Probe Installations (for HMT313/317) 1 3 2 0508-026 Figure 28 Cable Installation with Cable Gland AGRO The following numbers refer to Figure 28 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 Options and Accessories on page 76).
USER'S GUIDE____________________________________________________________________ 1 2 0508-027 Figure 29 Probe Installation with Cable Gland (not available from Vaisala) The following numbers refer to Figure 29 above: 1 = Cable gland AGRO 1160.20.145 (T = -40 ...
Appendix A ___________________ PROBE INSTALLATION KITS AND INSTALLATION EXAMPLES 0507-043 Figure 30 Installing the HMT318 Probe Through a Ball Valve Assembly The following numbers refer to Figure 30 above: 1 2 3 4 5 6 7 8 = = = = = = = = Manual press tool Handle of the ball valve Probe Process chamber or pipeline Groove on the probe indicates the upper adjustment limit Filter Ball of the ball valve Clasp nut NOTE The probe can be installed in the process through the ball valve assembly provided that
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 30 on page 85. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. NOTE 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. Close the ball valve.
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