Intrinsically safe humidity and temperature transmitter series (152 pages)
Summary of Contents for Vaisala HUMICAP HMT360 SERIES
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USER'S GUIDE Vaisala HUMICAP® Dewpoint and Temperature Transmitter Series HMT360 M210744EN-C...
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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...
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Maximum Cable Resistance Calculation for the Barrier (Vaisala Order Code: 210664) ... . . 37 HMT360 Connected to a Galvanic Isolator ..38 HMT360 Connected to a Zener Barrier .
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Protection Cover ........86 APPENDIX B WIRING FOR INTRINSICALLY SAFE OPERATION, FM ... . . 87 VAISALA ________________________________________________________________________ 3...
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________________________________________________________________________________ APPENDIX C WIRING FOR INTRINSICALLY SAFE OPERATION, CSA ... .89 APPENDIX D CERTIFICATES ..........91 4 _______________________________________________________________________________...
This chapter provides general notes for the manual and the product. About This Manual This manual provides information for installing, operating, and ® maintaining the Vaisala HUMICAP Dewpoint and Temperature Transmitter Series HMT360 for Natural Gas. Contents of This Manual...
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User's Guide ______________________________________________________________________ Chapter 6, Calibration and Adjustment: This chapter contains instructions for checking the calibration and adjusting this product. Chapter 7, Maintenance: This chapter provides information that is needed in basic maintenance of the product. Chapter 8, Troubleshooting: This chapter describes common problems, their probable causes and remedies, and contact information.
Caution warns you of a potential hazard. If you do not read and follow instructions carefully at this point, the product could be damaged or important data could be lost. NOTE Note highlights important information on using the product. VAISALA _______________________________________________________________________ 11...
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.
User's Guide ______________________________________________________________________ License Agreement All rights to any software are held by Vaisala or third parties. The customer is allowed to use the software only to the extent that is provided by the applicable supply contract or Software License Agreement.
This chapter introduces the features, advantages, and the product nomenclature. Introduction to HMT360 ® Vaisala HUMICAP Dewpoint and Temperature Transmitter Series HMT360 for Natural Gas contains reliable, microprosessor-based two- wire instruments for measuring moisture in natural gas in hazardous areas. VAISALA _______________________________________________________________________ 15...
In hazardous environments, the transmitters must always be connected via galvanic isolators or Zener barriers. Output Quantities ® Vaisala HUMICAP Dewpoint and Temperature Transmitter Series HMT360 for Natural Gas comes equipped with a local display and with one or two current output channels.
Figure 2 on page HMP362 probe for pressurized spaces up to 167 bars HMP364 probe for pressurized spaces up to 100 bars HMP368 probe for installations in pressurized pipelines up to 40 bars; features a pressure-tight sliding clasp nut VAISALA _______________________________________________________________________ 17...
- Assure that the conductive shield fulfils requirements of the standard EN50284 (resistance less than 1 G) and make sure that it can not come loose in any operation situation. VAISALA _______________________________________________________________________ 19...
User's Guide ______________________________________________________________________ WARNING During the installation work of the probes in gas group IIC areas (requiring category I devices), it has to be guaranteed that even in fault cases sparks generated by impacts or friction on the surface of the housing can never occur.
Press down the transmitter so that it slides along the rails of the mounting plate. Fasten the transmitter to the mounting plate with the Allen screw (3 mm Allen key provided). The probe can be detached and replaced when needed by simply unfastening the two Allen screws. VAISALA _______________________________________________________________________ 21...
The following numbers refer to Figure 5 on page Electronics unit Probe; including a part of the measurement electronics (for example, calibration memory) Flat cable Transmitter base Grounding terminal Protective covers Cable glands Sensor cable RS232C connector VAISALA _______________________________________________________________________ 23...
User's Guide ______________________________________________________________________ Probe Mounting CAUTION Do not unsolder and then resolder the probe cable from and to the printed board during installation. Do not shorten or lengthen the probe cable. These procedures may alter the humidity calibration of the transmitter. HMP362 Small Pressure-Tight Probe The HMP362 probe is a small pressure-tight probe equipped with an...
User's Guide ______________________________________________________________________ 0505-269 Figure 8 Optional Sampling Cell HMP302SC The following numbers refer to Figure 8 on page Gas in Probe Gas out Probe cable Sampling cell Clamp 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.
Change the sealing washer every time the fitting screw is detached. Use high-vacuum grease, for example Dow Corning, or a similar grease. NOTE When retightening the nut after detachment the nut must be tightened without increased effort. VAISALA _______________________________________________________________________ 27...
Installing the HMP368 Probe Through a Ball Valve Assembly on page 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 _______________________________________________________________________ 29...
User's Guide ______________________________________________________________________ NOTE When HMP368 is installed in a process with a pressure differing from normal atmospheric pressure, please enter the pressure value of the process (in bar ) into the transmitter memory, see section Setting the Pressure for Calculations on page 0606-156 Figure 12 HMP368 Probe...
Mark the fitting screw and the clasp nut. Tighten the nut a further 50 ... 60° (ca. 1/6 turn) with a fork spanner. If you have a suitable torque spanner, tighten the nut to 45 ± 5 Nm (33 ± 4 ft-lbs). VAISALA _______________________________________________________________________ 31...
Installing the HMP368 Probe Through a Ball Valve Assembly The ball valve installation kit (Vaisala order code: BALLVALVE-1) is preferred when connecting the probe to a pressurized process or pipeline. Use the ball valve set or a 1/2" ball valve assembly with a ball hole of ø14 mm or more.
20 bar. NOTE When measuring temperature dependent quantities make sure that the temperature at the measurement point is equal to that of the process, otherwise the moisture reading may be incorrect. VAISALA _______________________________________________________________________ 33...
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User's Guide ______________________________________________________________________ Follow the steps below to install the HMP368 probe through a ball valve assembly. After the installation, the probe should be sitting in the process chamber or pipeline as shown in Figure 15 on page 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.
When using the transmitter in hazardous locations, the use of galvanic isolators or barriers is essential. The following barrier & isolator are available in Vaisala: barrier No. 210664 (STAHL 9001/51-280-091- 141) and galvanic isolator No. 212483 (STAHL 9160/13-11-11). Examples of connections and more information on installation in...
User's Guide ______________________________________________________________________ Installation in Hazardous Locations US and Canadian Requirements USA (FM): Wiring for intrinsically safe operation is shown in Appendix B, Wiring for Intrinsically Safe Operation, FM, on page Canada (CSA): Wiring for intrinsically safe operation is shown in Appendix C, Wiring for Intrinsically Safe Operation, CSA, on page European Requirements CATEGORY 1 (Zone 0)
Chapter 3 _______________________________________________________________ Installation Maximum Cable Resistance Calculation for the Barrier (Vaisala Order Code: 210664) General specifications of HMT360: Supply voltage = 24 V (12 ... 35 V) Maximum current = 20 mA Minimum operating voltage for = 12 V (15 V with serial port)
User's Guide ______________________________________________________________________ From these facts the following equation can be formed: × I drop cabletot 2 = 2 × 0.085 /m × l × 20 mA = 2 V / (20 mA × 2 × 0.085 /m) = 588 m = 1930 ft, maximum cable length. NOTE If longer cable length is required, use of the galvanic isolators is recommended if possible.
Chapter 3 _______________________________________________________________ Installation HAZARDOUS AREA SAFE AREA b) voltage signal controller 0505-279 Figure 16 HMT360 Connected to Galvanic Isolator HMT360 Connected to a Zener Barrier HAZARDOUS AREA SAFE AREA a) current signal controller 0505-280 VAISALA _______________________________________________________________________ 39...
User's Guide ______________________________________________________________________ 0505-283 Figure 19 STAHL 9001/51-280-091-141 (Zener Barrier) Grounding When grounding the transmitter, follow the local requirements. Use at least 4 mm grounding cable when grounding the transmitter or barrier. Note that the allowed resistance between barrier and system ground must be less than 1 ohm.
48) can be used to scale the outputs and select output quantities. The measurement results are shown on the display. The keypad pushbuttons are indicated (from left to right) as C, Up, Dn, and E (see Figure 21 on page 46): VAISALA _______________________________________________________________________ 45...
User's Guide ______________________________________________________________________ 0606-155 Figure 21 Local Display/Keypad Interface Power ON/OFF Open the transmitter cover and flip the internal power switch to position ON (up), see Figure 23 on page When the transmitter is turned on, the existing pressure setting appears on the display;...
With these combinations you can perform relative humidity, temperature or analog output calibrations with a multimeter or with the transmitter display unit. Turn the DIP switches to the desired position according to the table printed on the protective cover. VAISALA _______________________________________________________________________ 47...
User's Guide ______________________________________________________________________ 5: Output quantities Determines whether the output units are metric (down) on non-metric. 6, 7 and 8: Select output quantities With the three DIP switches on the right, you can select the output quantities according to the table printed on the right side of the protective cover.
Up on the display cover, and acknowledge the value with button E. To complete the selections, turn the DIP switch back to position disabled (down). Character Quantity Abbreviation Metric Unit Nonmetric Unit temperature °C °F dewpoint °C °F temperature volume ppmv concentration VAISALA _______________________________________________________________________ 49...
User's Guide ______________________________________________________________________ Character Quantity Abbreviation Metric Unit Nonmetric Unit water content lb/MMscf mg/m Lower Half of Display The output quantities metric/non metric DIP switch can be used to select between °C and °F. It is possible to check the pressure setting of the transmitter by pressing button Dn.
Numbers on the second line indicate the high end scaling of Ch 1. The text "Set Hi" on the lower left-hand corner indicates that you can now change the high end scaling with buttons Up and Dn. Acknowledge with button E. VAISALA _______________________________________________________________________ 51...
The serial interface MUST NOT be used in hazardous areas. Use the serial interface for calibration and testing purposes in safe areas only. Always use the serial interface cable (optional accessory, Vaisala order code: 25905ZZ). Connect one end of the cable to the serial port of your computer and the other to the connector marked "RS232C"...
In these commands, <cr> stands for pressing Enter (on your computer keyboard). Setting the Analog Outputs ASEL Selecting Analog Outputs Syntax: ASEL [xxx yyy]<cr> where xxx = Quantity of Ch 1 yyy = Quantity of Ch 2 VAISALA _______________________________________________________________________ 53...
User's Guide ______________________________________________________________________ Turn the internal DIP switch Calibration Enabled/Disabled to position ON before the selecting the analog outputs and return it to position OFF after making the selection. Output quantities and their abbreviations are listed in the table below: Quantity Abbreviation temperature...
>ct<cr> 0.811 1. ref ? 0.5<cr> Press any key when ready ...<cr> 99.122 2. ref ? 99.5<cr> > The OK indicates that the adjustment was succesful. When performing one-point adjustment press only Enter for the second reference. VAISALA _______________________________________________________________________ 55...
User's Guide ______________________________________________________________________ Output Commands ITEST Testing Analog Outputs NOTE Before giving command ITEST, reset the transmitter with command RESET, see section RESET Transmitter Reset on page Syntax: ITEST aa.aaa bb.bbb<cr> where aa.aaa = Current value to be set for Ch 1 (mA) bb.bbb = Current value to be set for Ch 2 (mA) This command outputs the current value of each channel and the...
Sets the output interval when the transmitter outputs measurement readings. The time interval is used when the continuous output is active. Example, the output interval is set to 10 minutes: >intv 10 min<cr> Output interval: 10 MIN > VAISALA _______________________________________________________________________ 57...
User's Guide ______________________________________________________________________ PRES Setting Ambient Pressure for Calculations Syntax: PRES aaaa.a<cr> where aaaa.a = Pressure (bar Turn the internal DIP switch Calibration Enabled/Disabled to position ON before setting the pressure and return it to position OFF after making the setting. Example: >pres 12<cr>...
Average of ca. 16 measurements This commands sets the measurement result filtering. Example: >filt 1<cr> Filter 1.0000 >filt 0.5<cr> Filter 0.5000 >filt 0.1<cr> Filter 0.1000 > Resetting the Transmitter RESET Transmitter Reset Syntax: RESET<cr> This command resets the device. VAISALA _______________________________________________________________________ 59...
The accuracy of the dewpoint measurement is affected by pressure in the measurement chamber. The actual pressure in the sampling cell is required to be set to the transmitter, see section Setting the Pressure for Calculations on page 48). VAISALA _______________________________________________________________________ 61...
User's Guide ______________________________________________________________________ Pressure Regulator Recommended When sampling pressurized processes exceeding the maximum measurement pressure of the probe, the pressure in the measurement chamber must be regulated to the acceptable level or below. It is recommended to use pressure regulator before the measurement chamber to prevent remarkable pressure variations.
NOTE HMT360 for natural gas must always be adjusted in a Vaisala Service Center. The device (or the probe only) can be sent to Vaisala Service Centers for calibration and adjustment. See section Technical Support on page for contact information.
User's Guide ______________________________________________________________________ Removing the Electronics Unit 0605-051 Figure 23 Detaching the Electronics Unit with Probe for Calibration and Adjustment Unfasten the screws and open the cover. Switch the transmitter off with the ON/OFF switch. Disconnect the flat cable by lifting it carefully, for example with a screwdriver.
If the current measurement is needed in a hazardous area, the multimeter is connected to the terminals A1/A2 (+) and B1/B2 (-). Use only an approved multimeter. VAISALA _______________________________________________________________________ 65...
User's Guide ______________________________________________________________________ WARNING The power supply connectors (C1 and C2) MUST NOT be used in hazardous areas. For calibration and adjustment in a hazardous area use only an approved multimeter, which fulfills the safety factors printed on the protective cover. Calculating Correspondence of Current Values and Output Quantities When using HMT360 without a display, calibration and adjustment is...
(when using a multimeter calculate the current value corresponding to the reference humidity by using the equations presented in Calculating Correspondence of Current Values and Output Quantities on page 66). Conclude the one-point adjustment by pressing button E twice. VAISALA _______________________________________________________________________ 67...
User's Guide ______________________________________________________________________ ACAL Analog Output Calibration Syntax: ACAL<cr> Connect HMT360 to a multimeter. Issue the ACAL command: Disconnect the serial cable from the transmitter while reading the multimeter value for the Ch 1 (I1). Reconnect the serial cable. Type the multimeter reading and press Enter.
Removing the Electronics Unit on page 64 for detailed information. All other maintenance must be performed by qualified Vaisala personnel. If a transmitter is damaged, contact your nearest Vaisala Service Center. See section Technical Support on page 74 for contact information.
Make also sure the filter remains tighly fit. If you need to replace the filter: Make sure you have the spare part available, or order one from your nearest Vaisala Service Center. See section Technical Support on page 74 for contact information.
Check the Vaisala HUMICAP sensor in your transmitter regularly. A corroded or otherwise damaged sensor has to be replaced, which needs to be done by your nearest Vaisala Service Center. See section Technical Support on page 74 for contact information.
Cleaning on page Check if there is condensed water in the probe. If yes, let the probe dry. In case of constant error, contact the Vaisala Helpdesk. See section Technical Support on page 74 for contact information. VAISALA _______________________________________________________________________ 73...
Analog outputs can be tested with dip switch 1, see DIP Switch Functions on page 47 for details. Technical Support For technical questions, contact the Vaisala technical support by e-mail at helpdesk@vaisala.com. For contact information of Vaisala Service Centers, see www.vaisala.com/services/servicecenters.html. 74 __________________________________________________________________ M210744EN-C...
Temperature Specifications Property Description / Value Measurement range -40 ... +100 °C Typical accuracy of electronics at +20 °C ± 0.1 °C Typical temperature dependence of 0.005 °C/°C electronics Sensor Pt 1000 RTD Class B IEC 751 VAISALA _______________________________________________________________________ 75...
± 0.05 %/°C full scale +20 °C Typical temperature dependence of analog ± 0.005 %/°C full scale outputs RS232C serial output for service use only connector type RJ45 in safe area WARNING Output connections are made via safety barriers. VAISALA _______________________________________________________________________ 77...
User's Guide ______________________________________________________________________ Classification with Current Outputs Europe (VTT) EU (94/9/EC, ATEX100a) II 1 G Ex ia IIC T4 Ga VTT 09 ATEX 028 X issue No: 1 Safety factors = 28 V, I = 100 mA, P = 700 mW = 1 nF, L negligibly low Environmental specifications...
950 g Fully electromagnetically compatible EN 61326-1: Electrical according to standards equipment for measurement, control and laboratory use - EMC requirements; Industrial environment NOTE IEC 1000-4-5 complies only when using external EXi approved surge arrester on safe area. VAISALA _______________________________________________________________________ 79...
User's Guide ______________________________________________________________________ Probes Table 13 Probe Specifications Property Description / Value Probe material Stainless steel (AISI 316L) Probe cable length 2 m, 5 m or 10 m Probe cable diameter 5.5 mm Sensor protection options sintered stainless steel filter HMP362 Probe - small pressure-tight Temperature range -40 ...
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Cable Gland M20×1.5 for 7.5...12mm 216587SP Cable Cable Gland M20×1.5 for 10...15mm 216588SP Cable Conduit Fitting M20×1.5 for NPT1/2 214780SP Conduit Dummy Plug M20×1.5 for transmitter 214672SP body OTHER Calibration Adapter for HMK15 211302SP Galvanic isolator 212483 Barrier 210664 VAISALA _______________________________________________________________________ 81...
Appendix A ______________________________________________________________ Dimensions APPENDIX A DIMENSIONS This Appendix contains parts drawings of the transmitter housing, probes and some transmitter mounting accessories with metric and nonmetric dimensions specified. Transmitter Housing 0604-052 VAISALA _______________________________________________________________________ 83...
Appendix B ______________________________________ Wiring for Intrinsically Safe Operation, FM APPENDIX B WIRING FOR INTRINSICALLY SAFE OPERATION, FM This appendix contains the wiring diagram for intrinsically safe operation approved by Factory Mutual (FM). VAISALA _______________________________________________________________________ 87...
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User's Guide ______________________________________________________________________ CHECKED / Reviewed ACCEPTED / Approved DESCRIPTION / INFO / ECO No. DESIGN HMT360 connection board -Ch1+ -Ch2+ General tolerance Design Material Weigh t Supplier Title code DOCUMEN T CRE ATION D ATA Finish YYY Y-MM-DD INITIAL S Creator Review Size...
Appendix C _____________________________________ Wiring for Intrinsically Safe Operation, CSA APPENDIX C WIRING FOR INTRINSICALLY SAFE OPERATION, CSA This appendix contains the wiring diagram for intrinsically safe operation approved by the Canadian Standards Association (CSA). VAISALA _______________________________________________________________________ 89...
CERTIFICATES This Appendix contains copies of the EXi intrinsically safe certificates issued for the HMT360 series. VTT IECEx Certificate VTT ATEX Certificates FM Certificate of Compliance CSA Certificate of Compliance TIIS Certificate of Compliance PCEC Conformity Certificate VAISALA _______________________________________________________________________ 91...