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Vaisala HMP361, User Manual

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Vaisala HMP361 User Manual Download Page 49

Calibration and adjustment____________________________________________________________

Vaisala _________________________________________________________________________ 49

F

IGURE  

9-3

Display chart of the automatic calibration procedure.

Calibration enabled
RH calibration on

Restore switches

Summary of Contents for HMP361

Page 1: ...HMT360 Series Transmitters for Hazardous Areas USER S GUIDE M010056EN D May 2004...

Page 2: ...00421 Helsinki Finland Visit our Internet pages at http www vaisala com Vaisala 2004 No part of this manual may be reproduced in any form or by any means electronic or mechanical including photocopyin...

Page 3: ...s 12 Checking the temperature reading 12 Mounting the transmitter 13 Mounting the probes 14 The HMP362 small pressure tight probe 14 The HMP363 probe for confined spaces 15 The HMP365 probe for high t...

Page 4: ...INTERFACE 38 Serial communication settings 38 Selecting the analog outputs 39 Scaling the analog outputs 40 Adjustment commands 40 Relative humidity adjustment 40 Temperature adjustment 41 Analog outp...

Page 5: ...t 51 CHAPTER 11 SPECIFICATIONS 52 Performance 52 Calculated variables available typical ranges 53 Outputs 54 Classification with current outputs 54 General 55 Probes 56 Options and accessories 56 ACCU...

Page 6: ...nt data could be lost NOTE Note highlights important information on using the product ESD Protection Electrostatic Discharge ESD can cause immediate or latent damage to electronic circuits Vaisala pro...

Page 7: ...escription U336en 1 1 1st version March 1999 M010056en A 2nd version January 2001 M010056en B 3rd version March 2002 M010056en C 4th version November 2002 M010056EN D 5th version May 2004 Warranty For...

Page 8: ...re in hazardous areas requiring EX classification Connect the transmitter always via galvanic isolators or zener barriers in hazardous environments Output quantities The transmitter has a local displa...

Page 9: ...ee page 44 for detailed information All other maintenance is performed at the factory If a transmitter is damaged contact Vaisala or Vaisala distributor and send the instrument to the addresses below...

Page 10: ...for hazardous locations Marking EEx ia IIC T4 at temperature range 20 60 C and pressure range 0 8 1 1 bar US requirements FM FM approved for Classes I II III Division 1 Groups A B C D E F G and Divisi...

Page 11: ...or conductive tape or mount the probe cable in a metal conduit Assure that the conductive shield fulfils requirements of the standard EN50284 resistance less than 1 G and make sure that it can not co...

Page 12: ...this installation is not possible and the sensor head must be installed through the wall e g with a flange the sensor head and the cable must be insulated carefully Checking the temperature reading Th...

Page 13: ...e wall with 4 screws 2 Press down the transmitter so that it slides along the rails of the mounting plate 3 Fasten the transmitter to the mounting plate with the Allen screw 4 The probe can be detache...

Page 14: ...may alter the humidity calibration of the transmitter The HMP362 small pressure tight probe The HMP362 probe is a small pressure tight probe equipped with installation flange It is suitable for dewpoi...

Page 15: ...ar into the transmitter memory via the serial line see page 42 or via the display keypad see page 33 The HMP363 probe for confined spaces The HMP363 is a small size general purpose probe suitable for...

Page 16: ...outside of the duct This can cause incorrect humidity readings FIGURE 3 4 Mounting the HMP365 sensor head in a duct or channel HMP364 for pressurized spaces The HMP364 pressure tight probe is designe...

Page 17: ...Nm 110 7 ft lbs 3 Insert the body of the sensor head into the fitting screw and screw the nut manually to the fitting screw until the connection feels tight 4 Mark both the fitting screw and the nut h...

Page 18: ...__________________________________________________ 18 NOTE If the HMP364 is installed in a process with a pressure differing from normal atmospheric pressure please enter the pressure value of the pro...

Page 19: ...ewpoint measurements in natural gas When the probe is used in a pressurized pipeline or in liquids e g feeder routes the sensor head should preferably be installed directly in the process through a ba...

Page 20: ...s tight and may prevent it from going through the clasp nut Tightening the clasp nut 1 Adjust the probe to a suitable depth according to the type of installation 2 Tighten the clasp nut first manually...

Page 21: ...head to pressurized process or pipeline is to install it through the ball valve assembly This installation makes it unnecessary to empty or shut down the process for installing or removing the sensor...

Page 22: ...rocess flow NOTE Installation or removing the probe through a ball valve assembly is possible without shutting the process when the pressure is less than 10 bar With 10 40 bar pressures you must shut...

Page 23: ...gure 3 2 item 7 3 Connect the unpowered power supply wires to the connectors CH1 humidity and CH2 temperature Both channels require an own power supply NOTE As CH1 is a main output the transmitter doe...

Page 24: ...be short circuited see figure 4 3 Figures 4 1 and 4 2 present examples of galvanic isolators and zener barrier connections only CH1 connected Maximum load calculation for the barrier Always check the...

Page 25: ..._______________ 25 HMT360 connected to a galvanic isolator a current signal controller b voltage signal controller FIGURE 4 1 HMT360 connected to a galvanic isolator CH 1 CH 2 Rl U Power Supply Galvan...

Page 26: ...____________________________ 26 HMT360 connected to a zener barrier a current signal controller b voltage signal controller FIGURE 4 2 HMT360 connected to a zener barrier CH 1 CH 2 Power Supply Zener...

Page 27: ...ic isolator FIGURE 4 4 STAHL 9001 51 280 091 141 zener barrier Make the connection between the terminals always when using a galvanic isolator STAHL 9160 13 11 11 Ch2 HMT360 Connection HAZARDOUS AREA...

Page 28: ...ollow the local requirements Use at least 4 mm2 grounding cable when grounding the transmitter or barrier Note that the allowed resistance between barrier and system ground must be less than 1 ohm See...

Page 29: ...ng turn the transmitter s internal CALIBRATION ENABLED DISABLED dip switch to position ENABLED up Adjust the pressure reading with buttons and on the display cover the adjustment step is 100 hPa Ackno...

Page 30: ...e not restored the LED indicator keeps blinking Dip switch functions The table below is also printed on the protection board n o p q r s t u n ANALOG OUTPUT TEST ON OFF if you turn the switch to ON po...

Page 31: ...d position according to the table printed on the protective cover r OUTPUT QUANTITIES determines whether the output units are metric down on non metric s t and u SELECT OUTPUT QUANTITIES with the thre...

Page 32: ...isplay shows ERROR LED on the cover is lit and no calibration is going on transmitters without a display In the case of error Check that the sensor is connected properly Check if there is condensed wa...

Page 33: ...sensor and probe are dry set the filter back on the probe NOTE Do not touch the sensor surface especially if removing the HUMICAP sensor from the probe Only dipping to de ionized water or IPA is allow...

Page 34: ...ng ratio and wet bulb calculations In dewpoint transmitters natural gas applications the process pressure in the measurement point is required to achieve the specified accuracy To modify the pressure...

Page 35: ...ED down When the OUTPUT QUANTITIES METRIC NON METRIC dip switch is in the METRIC down position the available quantities are dew frost point temperature Td C parts per million ppm and absolute humidity...

Page 36: ...ature T A D F H N 2 dewpoint temperature Td D N 3 absolute humidity a D 4 mixing ratio x D 5 wet bulb temperature Tw D 6 volume concentration ppm H N 7 water activity aw H F 8 relative humidity of sat...

Page 37: ...buttons and Acknowledge the value with button E and a text similar to the following appears Numbers on the second line indicate the high end scaling of channel 1 The text SET HI on the lower left hand...

Page 38: ...not able to operate with 4 mA Therefore it is recommended to use serial communication only temporarily for changing settings or for calibrating the transmitter in a safe area With serial port the min...

Page 39: ...return Selecting the analog outputs Turn the internal dip switch CALIBRATION ENABLED DISABLED to ON position before the selecting the analog outputs and return it to OFF position after selecting ASEL...

Page 40: ...b upper limit of the quantity Example Scaling the relative humidity SRH 0 100 RH lo 0 00 RH RH hi 100 00 RH Exception When you have natural gas transmitter and you scale the quantity of water content...

Page 41: ...ter asks and measures temperature readings and calculates the calibration coefficients for example CT T 0 81 1 ref 0 5 Press any key when ready T 99 12 2 ref 99 5 OK The OK indicates that the calibrat...

Page 42: ...value to be set for channel 2 mA For example ITEST 8 12 8 000 3F8 12 000 70O ITEST 6 349 25A 19 001 E93 The set current values remain valid until you give the command ITEST without readings With this...

Page 43: ...intrv 10 min Setting the ambient pressure for calculations Turn the internal dip switch CALIBRATION ENABLED DISABLED to ON position before setting the pressure and return it to OFF position after sett...

Page 44: ...valve set available The accuracy of the dewpoint measurement is affected by pressure in the measurement chamber The actual pressure in the sampling cell shall be set to the transmitter by using the se...

Page 45: ...ion and adjustment see contact information on page 9 HMT360 for natural gas shall be adjusted always in Vaisala Service Center Calibration and adjustment by the user Note that HMT360 for natural gas c...

Page 46: ...nd multimeter for calibration 1 Unfasten the screws and open the cover 2 Switch the transmitter off with the ON OFF switch 3 Disconnect the flat cable by lifting it carefully e g with a screw driver 4...

Page 47: ...ous area the multimeter is connected to the terminals A1 A2 and B1 B2 Use only an approved multimeter WARNING The power supply connectors C1 and C2 MUST NOT be used in hazardous areas For calibration...

Page 48: ...the calibration dip switch to ENABLED position and select RH calibration by using switches 3 and 4 see Chapter 5 Dip switch functions Remove the filter and insert the probe head into a measurement hol...

Page 49: ..._________________________________________ Vaisala _________________________________________________________________________ 49 FIGURE 9 3 Display chart of the automatic calibration procedure Calibrati...

Page 50: ...mitter display to monitor the stabilization Press the buttons and to adjust the display reading or multimeter reading to correspond the reference value when using a multimeter calculate the current va...

Page 51: ...e a high quality standard for calibrating the temperature NOTE If you use serial commands please refer to page 40 Set the calibration dip switch to position ENABLED up Set the calibration dip switches...

Page 52: ...dity standards 1 RH 0 90 RH 2 RH 90 100 RH salt solutions 2 RH 0 90 RH ASTM E104 85 3 RH 90 100 RH Response time 90 at 20 C in still air with sintered filter 15 seconds Sensors HUMICAP 180 for typical...

Page 53: ...ed against high quality certified humidity standards 0 01 0 0 9 0 02 0 9 1 0 when calibrated against salt solutions ASTM E104 85 0 02 0 0 9 0 03 0 9 1 0 Response time 90 at 20 C in still oil stainless...

Page 54: ...A one standard one optional Typical accuracy of analog Outputs at 20 C 0 05 full scale Typical temperature dependence of analog outputs 0 005 C full scale RS232C serial output for service use connecto...

Page 55: ...Vmax 28 VDC Ii 100 mA Pi 0 7 W Ci 1nF Li 0 mH General Operating voltage 12 28 V with serial port service mode 15 28 V Connections screw terminals 0 33 2 0 mm2 wires AWG 14 22 Cable bushing Pg11 5 12m...

Page 56: ...Pa 0 167 bar HMP363 Probe confined spaces Temperature range 40 120 C HMP364 Probe high pressures Temperature range 40 180 C Pressure range 0 10 MPa 0 100 bar HMP365 Probe high temperatures Temperature...

Page 57: ...Accuracy of the calculated variables depend on the calibration accuracy of the humidity and temperature sensors here the accuracy are given for 2 RH and 0 2 C Accuracy of dewpoint temperature C Relat...

Page 58: ...0 29 0 29 0 29 0 30 0 30 0 31 0 31 20 0 45 0 45 0 45 0 44 0 44 0 44 0 43 0 43 0 42 0 42 40 0 84 0 77 0 72 0 67 0 64 0 61 0 58 0 56 0 54 0 52 60 1 45 1 20 1 03 0 91 0 83 0 76 0 71 0 67 0 63 0 60 80 2...

Page 59: ..._______________________________________________________________ 59 APPENDIX 1 DIMENSIONS HMT361 HMP362 Flange intersection Sample cell HMP302SC 36 1 42 32 1 26 41 1 61 M6 12 0 47 1 8 27 NPT 9 0 35 7 0...

Page 60: ..._________________________________________________________________________________ Vaisala _________________________________________________________________________ 60 HMP363 HMP364 HMP365 HMP368...

Page 61: ..._______________________________________________________________________________ Vaisala _________________________________________________________________________ 61 Mounting plate Rain shield 180 80 1...

Page 62: ..._________________________________________________________________________ Vaisala _________________________________________________________________________ 62 Protection cover 208 224 160 184 8 2 189...

Page 63: ...ivision 1 groups A G and Division 2 Groups A D F and G Safety factors for HMT360 series transmitters are Vmax 28 V Imax 100 mA Ci 1 nF Li 0 Pi 0 7 W NOTE 1 Barrier installation must be completed in ac...

Page 64: ...m 8 Maximum safe area voltage is 250V p HMT360 series transmitters are approved for use in Division 1 and 2 Class I Groups A B C and D Division 1 and 2 Class II Group G and coal dust Division 1 and 2...

Page 65: ..._________________________________________________________________________________ Vaisala _________________________________________________________________________ 65 CERTIFICATES...

Page 66: ..._________________________________________________________________________________ Vaisala _________________________________________________________________________ 66...

Page 67: ..._________________________________________________________________________________ Vaisala _________________________________________________________________________ 67...

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