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Summary of Contents for Vaisala HUMICAP HMT310
- Page 1 USER'S GUIDE ® Vaisala HUMICAP Humidity and Temperature Transmitter HMT310 M210619EN-D...
- Page 2 The contents are subject to change without prior notice. Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user. All legally binding commitments and agreements are included exclusively in the applicable supply contract or Conditions of...
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Page 3: Table Of Contents
HMT315 for High Temperatures ........28 HMT317 for Demanding Processes....... 28 HMT318 for Pressurized Pipelines ........ 29 Tightening the Clasp Nut ..........30 Connections................32 Cable Wiring................ 32 Screw Terminal Connector..........33 CHAPTER 4 OPERATION....................35 Power ON/OFF ................ 35 VAISALA ________________________________________________________________________ 3... - Page 4 USER'S GUIDE____________________________________________________________________ Entering Serial Communication Parameters .......35 List of Commands ..............37 Measurement Output..............39 R Start Continuous Outputting ..........39 S Stop Continuous Outputting..........39 INTV Set Continuous Output Interval for RUN-Mode..40 SEND Output Reading Once..........40 SMODE Set Serial Interface Mode........40 SERI Serial Line Settings ............41 ADDR Set Transmitter Address for Use in POLL-Mode ..41 OPEN Temporarily Open Transmitter from POLL-Mode to Receive Serial Commands..........42...
- Page 5 Filter Change............... 63 Sensor Change ..............63 Parts List for Consumables ..........64 Technical Support ..............64 Return Instructions ..............65 Vaisala Service Centers............66 CHAPTER 7 CALIBRATION AND ADJUSTMENT............67 Calibration and Adjustment Commands......67 LI Revert Factory Calibration ..........67 FCRH Relative Humidity Calibration after Sensor Change 68 CTEXT Set Calibration Information Text......
- Page 6 Swagelok Installation Kit for RH Probe ........82 Figure 28 Cable Installation with Cable Gland AGRO......83 Figure 29 Probe Installation with Cable Gland (not available from Vaisala)..................84 Figure 30 Installing the HMT318 Probe Through a Ball Valve Assembly.85 6 ___________________________________________________________________ M210619EN-D...
- Page 7 Available Spare Parts............... 64 Table 11 Relative Humidity Specifications ..........73 Table 12 Temperature Specifications (and Operating Pressure Ranges) ..................74 Table 13 Electronics Specifications............75 Table 14 Mechanics Specifications ............75 Table 15 Options and Accessories............76 VAISALA ________________________________________________________________________ 7...
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Page 9: Chapter 1 General Information
HMT310 in overpressure conditions. - Chapter 6, Maintenance, provides information that is needed in basic maintenance of HMT310, and lists contact information for technical support and Vaisala Service Centers. - Chapter 7, Calibration and Adjustment, describes the relative humidity and temperature adjustment procedures. -
Page 10: Version Information
NOTE Note highlights important information on using the product. Feedback Vaisala Customer Documentation Team welcomes your comments and suggestions on the quality and usefulness of this publication. If you find errors or have other suggestions for improvement, please indicate the chapter, section, and page number. -
Page 11: Product Related Safety Precautions
ESD Protection Electrostatic Discharge (ESD) can cause immediate or latent damage to electronic circuits. Vaisala products are adequately protected against ESD for their intended use. However, it is possible to damage the product by delivering electrostatic discharges when touching, removing, or inserting any objects inside the equipment housing. -
Page 12: Recycling
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. -
Page 13: Emissions
Warranty Vaisala hereby represents and warrants all Products manufactured by Vaisala and sold hereunder to be free from defects in workmanship or material during a period of twelve (12) months from the date of delivery save for products for which a special warranty is given. If any Product... - Page 14 Product or part shall, should Vaisala so require, be sent to the works of Vaisala or to such other place as Vaisala may indicate in writing, freight and insurance prepaid and properly packed and labelled, unless Vaisala agrees to inspect and repair the Product or replace it on site.
- Page 15 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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Page 17: 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 ... -
Page 18: Components
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. -
Page 19: Probe Options
5 = HMT317 for demanding processes (warmed and vapor-tight probe) 6 = HMT318 for pressurized pipelines (40 bar, ball valve) Flange for HMT315 available as an option Probe cable lengths: 2, 5 and 10 m. VAISALA _______________________________________________________________________ 19... -
Page 20: Output Quantities
USER'S GUIDE____________________________________________________________________ Output Quantities Table 2 HMT310 Output Quantities Quantity Metric Unit Nonmetric Unit RH Relative humidity C F T Temperature TDF Dewpoint/Frostpoint C F C F TD Dewpoint A Absolute humidity gr/ft X Mixing ratio g/kg gr/lb C F TW Wet bulb temperature PPM Humid air volume/... -
Page 21: Chapter 3 Installation
Mount the plate onto the wall with four/two screws (Ø 4.5 mm/6.0 mm). Place the transmitter onto the mounting plate and fasten it with two Allen screws. The transmitter module can be unfastened for calibration by releasing the two Allen screws on the left side. VAISALA _______________________________________________________________________ 21... -
Page 22: Figure 3 Mounting With Mounting Plates
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... -
Page 23: Mounting The Probes
As the curve in Figure 5 on page 24 shows, if the temperature is +20 °C and the relative humidity 100 %RH, a difference of ±1 °C between the environment and the probe causes an error of ±6 %RH. VAISALA _______________________________________________________________________ 23... -
Page 24: General Instructions For Probes With Cable
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. -
Page 25: Hmt313 For General Use
HMT313 for General Use The HMT313 is a small size (d = 12mm) general-purpose probe suitable for ducts and channels with the installation kit available from Vaisala. VAISALA _______________________________________________________________________ 25... -
Page 26: Hmt314 For Pressurized Spaces
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. See Appendix A on page 81 for the following probe installation kits for HMT313 and installation examples: - Duct mounting kit... -
Page 27: Figure 9 Marking The Nut
See also Chapter 5, Measuring at Overpressure, on page 61. CAUTION In pressurized processes it is essential to tighten the supporting nuts and screws very carefully to prevent loosening of the probe by the action of pressure. VAISALA _______________________________________________________________________ 27... -
Page 28: Hmt315 For High Temperatures
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. -
Page 29: Hmt318 For Pressurized Pipelines
The following two fitting body options are available: - Fitting Body ISO1/2 solid structure - Fitting Body NPT1/2 solid structure Table 3 HMT318 Probe Dimensions Probe Type Probe Dimension Adjustment Range Standard 178 mm 120 mm Optional 400 mm 340 mm VAISALA _______________________________________________________________________ 29... -
Page 30: Tightening The Clasp Nut
USER'S GUIDE____________________________________________________________________ 0507-025 Figure 11 Sealing of Fitting Body into Process Tightening the Clasp Nut 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... - Page 31 When HMT318 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 section PRES Set Ambient Pressure for Calculations on page 48). VAISALA _______________________________________________________________________ 31...
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Page 32: Connections
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. -
Page 33: Screw Terminal Connector
1 White (WHT) RS-232 TX 2 Brown (BRN) RS-232 GND 3 Green (GRN) CH2+ 4 Yellow (YEL) CH1+ 5 Grey (GREY) Supply-/CH1-/CH2 - 6 Pink (PINK) Supply+ 7 Blue (BLU) RS-232 RX 8 Red (RED) Not connected VAISALA _______________________________________________________________________ 33... - Page 34 USER'S GUIDE____________________________________________________________________ This page intentionally left blank. 34 __________________________________________________________________ M210619EN-D...
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Page 35: Chapter 4 Operation
- Full duplex - Serial asynchronous - Configured as Data Terminal Equipment (DTE) Enter the communication parameters when using this terminal session for the first time; save them for future use. See instructions in Table 4 on page 36. VAISALA _______________________________________________________________________ 35... -
Page 36: Table 4 Entering Serial Parameters In Windows 2000 And Windows Nt
USER'S GUIDE____________________________________________________________________ ® Table 4 Entering Serial Parameters in Windows 2000 and ® Windows NT WINDOWS 2000 WINDOWS NT MENU WHAT TO DO MENU WHAT TO DO Start Start move the cursor to: move the cursor to: Programs Programs ... -
Page 37: List Of Commands
Serial line settings (default: 4800 E 7 1) baud: 300…19200 ADDR [0 … 99] Set transmitter address for Use in POLL-mode OPEN [0 … 99] Temporarily open transmitter from POLL-mode to receive commands CLOSE Set transmitter in POLL-mode VAISALA _______________________________________________________________________ 37... - Page 38 USER'S GUIDE____________________________________________________________________ Output formatting FORM Serial output format TIME Set time DATE Set date FTIME [ON/OFF] Add time to SEND and R outputs FDATE [ON/OFF] Add date to SEND and R outputs UNIT Select metric or nonmetric output units FST [ON/OFF] Output state of optional probe heating and chemical purge (with SEND and R commands)
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Page 39: Measurement Output
RH= 28.0 %RH T= 23.3 'C RH= 28.0 %RH T= 23.3 'C RH= 28.0 %RH T= 23.3 'C S Stop Continuous Outputting Syntax: S<cr> Stops the continuous output. Also the Esc key (on your computer keyboard) can be used to stop outputting. VAISALA _______________________________________________________________________ 39... -
Page 40: Intv Set Continuous Output Interval For Run-Mode
USER'S GUIDE____________________________________________________________________ INTV Set Continuous Output Interval for RUN-Mode Syntax: INTV xxx yyy<cr> Where Output interval (0 ... 255) Unit (s, min or h) Example: >intv 1<cr> Output interval: 1 S >intv 1 min<cr> Output interval: 1 MIN >intv 1 h<cr> Output interval: 1 H SEND Output Reading Once Syntax in STOP-mode: SEND<cr>... -
Page 41: Seri Serial Line Settings
4800 o 7 1 changing all parameters >seri 600 n 8 1<cr> 600 n 8 1 ADDR Set Transmitter Address for Use in POLL-Mode Syntax: ADDR aa<cr> Where Address (0 ... 99) Example: >addr<cr> Address >addr 1<cr> Address VAISALA _______________________________________________________________________ 41... -
Page 42: Open Temporarily Open Transmitter From Poll-Mode To Receive Serial Commands
USER'S GUIDE____________________________________________________________________ OPEN Temporarily Open Transmitter from POLL-Mode to Receive Serial Commands Syntax: OPEN nn<cr> Where Address of the transmitter (0 ... 99) The OPEN command sets the bus temporarily in STOP-mode so that the SMODE command can be issued. Example: >open 4<cr>... -
Page 43: Output Formatting
Command format can be used to change the format of the output commands SEND and R. Format string consists of quantities and modifiers: use the quantity abbreviations and modifiers presented in Table 5 on page 44 and in Table 6 on page 44 when selecting the output quantities. VAISALA _______________________________________________________________________ 43... -
Page 44: Time, Date Setting Time And Date
USER'S GUIDE____________________________________________________________________ Table 5 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 45: Ftime, Fdate Add Time And Date To Send And R Outputs
The command enables or disables output of time and date to the serial line. UNIT Select Metric or Nonmetric Output Units Syntax: UNIT x<cr> Where x = M or N M = metric units N = nonmetric units VAISALA _______________________________________________________________________ 45... -
Page 46: Fst Output State Of Chemical Purge Or Sensor Heating (With Send And R Commands)
USER'S GUIDE____________________________________________________________________ Table 7 Output Quantities and their Metric and Nonmetric Units Quantity Metric Unit Nonmetric Unit RH Relative Humidity C F T Temperature C F TDF Dewpoint/frostpoint C F TD Dewpoint A Absolute humidity gr/ft X Mixing ratio g/kg gr/lb C F... -
Page 47: Other Commands
: 4800 E 7 1 Serial mode : STOP Analog outputs Ch1 output mode: 0 ...20mA Ch2 output mode: 0 ...20mA Ch1 error out : 0.000mA Ch2 error out : 0.000mA Ch1 RH 0.00 %RH Ch1 RH 100.00 %RH VAISALA _______________________________________________________________________ 47... -
Page 48: Echo Serial Bus Echo
USER'S GUIDE____________________________________________________________________ Ch2 T -40.00 'C Ch2 T 60.00 'C > ECHO Serial Bus Echo Syntax: ECHO x<cr> 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<cr>... -
Page 49: Table 8 Pressure Conversion Chart
Conversions from mmHg and inHg are defined at 0 °C and for mmH2O and inH2O at 4 °C. NOTE Pressure compensation is intended to be used in normal air only. When measuring in other gases, please contact Vaisala for further information. VAISALA _______________________________________________________________________ 49... -
Page 50: Filt Set Result Filtering
USER'S GUIDE____________________________________________________________________ FILT Set Result Filtering Syntax: FILT xx<cr> Enable or disable the filtering or select the extended filter to reduce noise of the measurement. Where x = ON, OFF or EXT ON = Short filter of about 15 s (results the average value of the last 15 s measurement data) OFF = No filtering (default) EXT = Extended filter of about 1 min (results the average value... -
Page 51: Setting, Scaling And Testing Analog Outputs
Ch1 output mode: 4...20mA Ch2 output mode: 4...20mA > ASEL Select Parameter for Analog Outputs Syntax: ASEL xxx yyy<cr> Where Quantity of channel 1 Quantity of channel 2 Use abbreviations shown in Table 9 on page 52. VAISALA _______________________________________________________________________ 51... -
Page 52: Ascl Scale Analog Outputs
USER'S GUIDE____________________________________________________________________ Table 9 Output Quantities and their Metric and Nonmetric Units Quantity Metric Unit Nonmetric Unit RH Relative Humidity C F T Temperature C F TDF Dewpoint/frostpoint C F TD Dewpoint A Absolute humidity gr/ft X Mixing ratio g/kg gr/lb C F... -
Page 53: Itest Test Analog Outputs
FORM Serial Output Format on page 43) yyy.yyy Value Example: >aqtest td 30<cr> CH1 Td 30.0000 12.00000mA CH2 x 2.5304 g/kg 4.08097mA > The set values remain valid until you give the command AQTEST without a value or reset the transmitter. VAISALA _______________________________________________________________________ 53... -
Page 54: Aerr Set Error Outputs
USER'S GUIDE____________________________________________________________________ AERR Set Error Outputs Syntax: AERR<cr> 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<cr>... -
Page 55: Automatic/Manual Chemical Purge
The automatic chemical purge can be also turned off if necessary. Automatic Chemical Purge Settings PUR Turn ON/OFF Automatic Chemical Purge This command enables or disables automatic chemical purge. Syntax: PUR x<cr> Where x = ON/OFF VAISALA _______________________________________________________________________ 55... -
Page 56: Pur Set Chemical Purge Interval
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. -
Page 57: Chemical Purge Activated Manually
Sensor Heating General This function is optionally available only in transmitters with ® HUMICAP sensor. It should be used only with the warmed 180RC probe. VAISALA _______________________________________________________________________ 57... -
Page 58: Setting Humidity Sensor Heating
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). -
Page 59: Setting Heating Parameters
- Extra heating time: 0 ... 255 s (default: 30 s) Example: >xheat Extra heat : OFF Extra heat RH : 95 ? 90 Extra heat temp: 100 ? 85 Extra heat time: 30 ? 10 >xheat on Extra heat : ON > VAISALA _______________________________________________________________________ 59... - Page 60 USER'S GUIDE____________________________________________________________________ This page intentionally left blank. 60 __________________________________________________________________ M210619EN-D...
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Page 61: Measuring At Overpressure
When sampling pressurized processes exceeding the maximum measurement pressure of the probe, the pressure in the measurement chamber must be regulated to acceptable level or below. It is recommended to use a pressure regulator before the measurement chamber to prevent significant pressure variations. VAISALA _______________________________________________________________________ 61... - Page 62 USER'S GUIDE____________________________________________________________________ This page intentionally left blank. 62 __________________________________________________________________ M210619EN-D...
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Page 63: Chapter 6 Maintenance
Install a new filter on the probe. When using the stainless steel filter, take care to tighten the filter properly (recommended force is 130 Ncm). New filters can be ordered from Vaisala, see Parts List for Consumables on page 64. Sensor Change ®... -
Page 64: Parts List For Consumables
Install a new filter on the probe. When using the stainless steel filter, take care to tighten the filter properly (recommended force is 130 Ncm). New sensors can be ordered from Vaisala, see Parts List for Consumables below. Parts List for Consumables... -
Page 65: Return Instructions
Include the information specified in step 2 in the box with the faulty product. Also include a detailed return address. Ship the box to the address specified by your Vaisala contact. VAISALA _______________________________________________________________________ 65... -
Page 66: Vaisala Service Centers
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. -
Page 67: Calibration And Adjustment
Reset the transmitter by issuing the RESET command. Transmitter returns to normal mode. Example: >li<cr> RH offset : -0.6000000 ? 0 RH gain 1.00000000 ? 1 offset : 0.00000000 ? 0 gain 0.40000000 ? 1 > VAISALA _______________________________________________________________________ 67... -
Page 68: Fcrh Relative Humidity Calibration After Sensor Change
Issue command CTEXT and enter calibration information text. Example: >ctext<cr> Cal. info : Vaisala/HEL ? HMK15<cr> > CDATE 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 21) and press the adjustment button once (see Figure 17 on page 70). -
Page 69: Acal Analog Output Calibration
Before calibration HMT310 needs to be set to adjustment mode by pressing the adjustment button once, see Figure 17 on page 70. (To return to normal operation mode, use command RESET, see RESET Reset Transmitter on page 50). VAISALA _______________________________________________________________________ 69... -
Page 70: Low End Adjustment
USER'S GUIDE____________________________________________________________________ 0507-048 Figure 17 Location of Adjustment Button NOTE 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. -
Page 71: High End Adjustment
If needed, record the calibration information (text and date) to the memory of the transmitter, see CTEXT Set Calibration Information Text on page 68 and CDATE Set Calibration Date on page 68. Reset the transmitter by issuing the RESET command. The transmitter returns to normal mode. VAISALA _______________________________________________________________________ 71... -
Page 72: 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 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. -
Page 73: Chapter 8 Technical Data
Response time (90 %) for 17 s with grid filter ® HUMICAP 180R and 50 s with grid + steel netting filter ® HUMICAP 180RC at 20 °C in 60 s with sintered filter 0.1 m/s air flow VAISALA _______________________________________________________________________ 73... -
Page 74: Figure 18 Accuracy Over Temperature Range
USER'S GUIDE____________________________________________________________________ Table 12 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 75: Table 13 Electronics Specifications
Complies with EMC standard EN61326-1, Industrial environment. NOTE When using the current output, the RF field susceptibility level (according to standard EN61000-4-3 with a frequency band of 110 ... 165 MHz) is only 3 V/m (generic environment) with the specified accuracy. VAISALA _______________________________________________________________________ 75... -
Page 76: Options And Accessories
PPS Plastic Grid Filter DRW010276SP Sintered Filter AISI 316L HM47280SP Stainless Steel Filter HM47453SP Stainless Steel Filter with Membrane 214848SP Sensors ® Vaisala HUMICAP 180R (general purpose) HUMICAP180R PT100 sensor 10429SP Probe mounting accessories Fitting Body M22x1.5 17223 Fitting Body NPT1/2 17225... -
Page 77: Dimensions In Mm (Inches)
Plates 0507-049 Figure 19 Transmitter Enclosure and Mounting Plate Dimensions The following numbers refer to Figure 19 above. Mounting plate alternatives: 1 = Wall Plate/Cover, DRW212957 (bigger plate) 2 = Wall Plate/Cover (No Flange), DRW214786 (smaller plate) VAISALA _______________________________________________________________________ 77... -
Page 78: Probes
USER'S GUIDE____________________________________________________________________ Probes HMT311 12 (0.47) 0507-050 Figure 20 Probe Dimensions HMT313 0508-008 Figure 21 HMT313 Dimensions 78 __________________________________________________________________ M210619EN-D... -
Page 79: Hmt314
Chapter 8 ____________________________________________________________ Technical Data HMT314 0507-052 Figure 22 HMT314 Dimensions HMT315 41 (1.61) (1.06) 2 (0.08) 192 (7.56) 242 (9.53) 0507-053 Figure 23 HMT315 Dimensions Flange for HMT315 available as an option VAISALA _______________________________________________________________________ 79... -
Page 80: Hmt317
USER'S GUIDE____________________________________________________________________ HMT317 0508-009 Figure 24 HMT317 Dimensions HMT318 0508-078 Figure 25 HMT318 Dimensions 80 __________________________________________________________________ M210619EN-D... -
Page 81: Probe Installation Kits And Installation Examples
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. Vaisala order codes: 210697 (for HMT313) and 210696 (for HMT315, no supporting bar). -
Page 82: Pressure-Tight Swagelok Installation Kits (For Hmt317)
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. -
Page 83: Examples Of Vapor-Tight Installations With Cable Gland
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). VAISALA _______________________________________________________________________ 83... -
Page 84: Ball Valve Installation Kit For Hmt318
2 = In pressurized conditions, use a locking ring (for example, 11x 1 DIN471) The installation option in Figure 29 above is not available from Vaisala and is presented here only as an example of how to achieve a vapor-tight installation with HMT313/317 probes. -
Page 85: Figure 30 Installing The Hmt318 Probe Through A Ball Valve Assembly
20 bars. When measuring temperature dependent quantities make sure that the NOTE temperature at the measurement point is equal to that of the process, otherwise the moisture reading may be incorrect. VAISALA _______________________________________________________________________ 85... - Page 86 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. 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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