OPERATING INSTRUCTIONS FOR Model 8800A & B Trace Moisture Analyzer DANGER HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS MONITORING SYSTEM. PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM. HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MAY PERSIST FOR A TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED. ONLY AUTHORIZED PERSONNEL SHOULD CONDUCT MAINTENANCE AND/OR SERVICING.
8800 Series Trace Moisture Analyzer Instruction Manual When calling your representative for technical support, please have your serial numbers available. The Sensor and Instrument Serial Numbers are on the instrument, also see section 3.4.4.4. Sensor Serial No.: _______________ Instrument Serial No.
8800 Series Trace Moisture Analyzer Instruction Manual The manufacturer reserves the right to change or modify the product specification and / or appearance at any time without notice. Therefore, the information in this document is subject to change without notice and does not represent a commitment on the part of the manufacturer.
8800 Series Trace Moisture Analyzer Instruction Manual Examine the 8800 Series Trace Moisture Analyzer package for damage or mishandling. If any damage is evident notify the carrier and request an inspection. Unpack the box, it should contain: The 8800 Series Trace Moisture Analyzer, sensor in desiccant container, connectorized cable, and this manual. PLEASE READ THIS MANUAL IN WHOLE, PRIOR TO INSTALLING OR REMOVING THE SENSOR FROM ITS SHIPPING CONTAINER.
8800 Series Trace Moisture Analyzer Instruction Manual Warranty This instrument is warranted to be free from defects in workmanship and materials. Liability under this warranty is limited to servicing, calibrating, and replacing any defective parts of the instrument returned to the factory for that purpose. Fuses are specifically excluded from any liability. This warranty is effective from the date of delivery to the original purchaser.
8800 Series Trace Moisture Analyzer Instruction Manual Table of Contents 1.0 Overview of the 8800 Series Trace Moisture Analyzer.......................................................1 2. Sensor and Sampling Techniques ..........................................................................................3 2.1 Precautions using the sensor ................................................................................................3 2.2 Sensor Technical Specifications .................................
8800 Series Trace Moisture Analyzer Instruction Manual Appendix D: Optional Sensor Fittings.....................................................................................41 Appendix E: 8800 Series Trace Moisture Analyzer Circuit Board Dimensions .....................42 Appendix F: Sensor/SpanCheck™ Theory of Operation ........................................................45 Appendix G: Dewpoint Response time Analysis ....................................................................
Section 1: Introduction 1.0 Overview of the 8800 Series Trace Moisture Analyzer The 8800 Series Trace Moisture Analyzer is a microprocessor based hygrometer, for measuring moisture content in gases in the range from -100°C to +20°C dewpoint depending on the sensor ordered. The 8800 Series uses a Hyper Thin Film HTF™ sensor which is encapsulated in sintered stainless steel, thus it is capable of coming into contact with a wide variety of environments.
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Section 2: Sensor and Sampling Techniques 2. Sensor and Sampling Techniques 2.1 Precautions using the sensor The HTF™ Al2O3 sensor is designed and field proven to be highly reliable, rugged and maintenance free. However the user should consider the following precautions: • If the instrument is used to measure moisture in toxic, flammable, or explosive gases, the sample outlet must exhaust to a safe place. • Check the sample line for leaks before and after connecting.
8800 Series Trace Moisture Analyzer Instruction Manual 2.2 Sensor Technical Specifications Type: ..................................Hyper Thin Film HTF™ high capacitance Al2O3. Dewpoint range:.................XTR-100: -148°F to +68°F (-100°C to +20°C) XTR-65: -85°F to +68°F (-65°C to +20°C). Capacitance:.......................15nF to 200nF. Accuracy: ...........................±5.5°F (±3°C) refer to appendix M for accuracy expressed in other units of measure. Repeatability: .....................±0.9°F (±0.
Section 2: Sensor and Sampling Techniques 2.3.1 In-situ Installation In-situ installation is recommended only for measurements where the gas pressure is expected to vary little, the gas is expected to be free of contaminants, the gas temperature is within the operating specifications of the sensor, and there is no chance of liquids coalescing. Examples of applications suited for in-situ installations are: pure gases, output of desiccant dryers (for instrument air), glove boxes, etc.
8800 Series Trace Moisture Analyzer Instruction Manual 2.3.2 Extractive Installation For extractive installations we recommend our sample system ESS, which may be equipped with a variety of features, such as: isolation valve, coalescing or particulate filter, pressure regulator, calibration sample injection or extraction port, pressure gauge, flow meter, weatherproof enclosure. Refer to the ESS literature for more information.
Section 2: Sensor and Sampling Techniques • • • • • • • • inside these materials. Try to run pipes to the sensor upwards, so that contaminants tend to fall back into the main line. Keep the length of the sample line to the sensor as short as possible. Use small diameter pipes (1/4” or 1/8” OD). Use sufficient flow rates (e.g. 1 l/min with 6 feet of 1/8” piping is adequate). The flow rate will influence the systems’ response time.
8800 Series Trace Moisture Analyzer Instruction Manual 2.5 Troubleshooting unexpected readings If erroneous readings are suspected on a newly acquired instrument, compare the serial number engraved on the sensor sintered filter, to the label on the instrument. The two should be the same; if they are not, the instrument may not be calibrated with the installed sensor.
Section 3: Instrument 3. Instrument 3.1 Precautions using the 8800 Series Trace Moisture Analyzer The 8800 Series Trace Moisture Analyzer uses state-of-the-art microelectronics to provide a compact full functioning instrument. The user should consider the following precautions when using any sensitive electronic device. • Observe the appropriate electrical safety codes and regulations.
8800 Series Trace Moisture Analyzer Instruction Manual 3.2 Instrument Technical Specifications Enclosure: .........................8800B tabletop or surface mount, watertight IP65 tested, and NEMA 12 tested 8800A panel-mount, DIN 43700 dimensional standard, optional NEMA 12 type protection gasketing available Dimensions & Weight:......8800B: 4.73” x 6.3” x 3.55”, 2.1 lbs (fully optioned) w/cables. 8800A: 5.67” x 2.84” x 2.95” DIN 43700 standard, 1.3 lbs (fully optioned) w/cables.
Section 3: Instrument 3.3 Installation 3.3.1 Instrument Mechanical Installation The 8800 Series Trace Moisture Analyzer is available in several different physical configurations. Please follow the instructions below, which describe the instrument being installed. The sensor installation is discussed in Section 2: Sensor and Sampling Techniques. 3.3.1.1 8800A (DIN43700) Enclosure Installation The standard 8800A Trace Moisture Analyzer is provided with two clip-on compression panel mounting brackets.
8800 Series Trace Moisture Analyzer Instruction Manual 3.3.2 Electrical Connections All connections are made via a 21 contact, pluggable screw terminal block referred to as P1. Pluggable Block Terminals 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 0.5A 250V Power Supply Module 4.3mH 0.0047uf 0.1uf 275VAC 0.0047uf RFI filter board Sensor Measuring Circuitry 0.
Section 3: Instrument to operate from 15 to 30 VDC 0.5A, with an internal 0.5A fast acting fuse. Please follow the appropriate installation procedures in the paragraphs below according to the electrical power option on your instrument. Do not connect to AC power without a proper ground connection. For Intrinsically Safe installations, first make sure that the equipment is qualified for the particular installation, it should have a label specifying the certifications and the approving agency.
8800 Series Trace Moisture Analyzer Instruction Manual or 30VDC, instruments for use in division 2 Hazardous Areas have hermetically sealed relays rated at 3A 125VAC. Use wiring appropriate for the voltage and current that will be switched by the relays. Also see section 1.3 for EMI considerations. Keep in mind that the relay polarity is programmable thus wiring should be designed to provide a fail safe operation in case of power failure. See section 3.4.4.2.
Section 3: Instrument 3.3.2.5 Interfacing to the RS-232 option The optional RS-232C interface is provided on the P1 connector. The configuration is 9600 baud, Even Parity, 8 Bits, 1 Stop, all received characters are echoed. The ground of the RS-232C interface is connected to the frame (AC power) ground however it is isolated from the sensor ground, see section 3.1.1.
8800 Series Trace Moisture Analyzer Instruction Manual 3.4.2 Display Conventions 1. To display characters with the 7 segment numeric display, the following pseudo-alphanumerics are used: Numbers: 0 12 3 4 5 6 7 8 9 01234567 89 Letters: ABCDEF GH IJ LNOP QRS TUXYZ ABCDEF GH I JL NOPQRSTUXYZ Symbols: ? - . ? -. 2. The instrument will indicate whether a particular mode allows changing a parameter by showing the word “SET” in the upper left corner of the display.
Section 3: Instrument • • switches described above. With a front face plate which has labeled holes placed immediately above the circuit board switches, thus the operator may push the switches without removing the face plate, by making use of a probe such as a paper clip. With a front plate containing four membrane switches connected to the circuit board, providing the operator with a easy to use interface.
8800 Series Trace Moisture Analyzer Instruction Manual parts per million by volume computed at the sensor pressure (more about pressure later). The LBS and G/M3 are density measurements, pounds of water per million standard cubic feet and grams of water per standard cubic meters, respectively, both in Natural Gas, they are computed according to data derived by IGT Research Bulletin 8, taking into account sensor pressure.
Section 3: Instrument 3.4.4.2 Alarms There are two independent optional alarms, they are named HI and LO alarms. Each alarm can activate a single pole double throw relay rated at 10A 250VAC or 30VDC per contact. Instruments for use in Division 2 Hazardous Areas have hermetically sealed relays rated at 3A 125VAC. Specially ordered instruments may have a third alarm, refer to the supplied addendum for relay contact rating, pinouts and user interface issues.
8800 Series Trace Moisture Analyzer Instruction Manual 5. Push the MODE button. The display will show: SET HI **** ˚C DEWPOINT the ‘DEWPOINT’ indicator means that we are changing the alarm trigger dewpoint 6. Push the UP or DOWN buttons until the display shows: SET HI ˚C DEWPOINT 7. Push the MODE button. The display will show: SET HI * ˚C the Z indicates that we are changing the hysteresis of the alarm. 8. Push the UP or DOWN buttons until the display shows: SET HI ˚C 9.
Section 3: Instrument Instrument calibration is recommended in approximately 12 month intervals, and the XTR65W sensor should be re-calibrated after prolonged exposure to liquid water. Simply follow steps 1 - 7 of the procedure below, removing the sensor from the sample gas stream. To avoid injury, make sure the gas stream is depressurized before removing the sensor. It is recommended to keep the sensor exposure to room air as short as possible, in order to avoid super saturation of the sensor.
8800 Series Trace Moisture Analyzer Instruction Manual Under certain conditions, an over (super) saturated sensor may need to be completely dried out before a calibration is performed. Symptoms of these conditions are a sensor that will not go through the SpanCheck™ function to the END display, or a sensor that will not dry down after calibration. To dry, install sensor in either a known dry gas stream i.e.
Section 3: Instrument • • • • • • • • Make sure the instrument is unlocked. Press the MODE button a few times until the display shows CAL. Press the DOWN button to select the Self Calibration mode. The display will show SLF/CAL Press the DOWN button to confirm entry into the Self Calibration mode. The display will show the reference dewpoint which has been previously programed into the instrument, the SET and DEWPOINT legends will also appear.
8800 Series Trace Moisture Analyzer Instruction Manual • • • • • • the calibrations are scheduled at 720 hours interval. Use the UP and DOWN buttons to change the interval time to whatever is determined to be most effective for your application, consult with your representative if you are in doubt.
Section 3: Instrument sequence of computations is as follows: • The capacitance is converted to percent of full scale (-100°C to +20°C dp), using the low dB, low dew, and saturated dB when performing SpanCheck values. • Cal Adj is applied to correct the mid point of the curve. • If enabled, the multi-point calibration table is applied to further correct the transfer function. • If enabled, the single point calibration is applied to fine tune the transfer function.
8800 Series Trace Moisture Analyzer Instruction Manual 2. Selecting the sensor type: In this mode the user can select the software matching the type of sensor installed in the instrument: XT1 : XTR-100 (-100°C to +20°C); XT6 : XTR-65 (-65°C to +20°C); DB : show impedance of any sensor, disable Open and Short error massages. 3&4Adjusting low end sensor attenuation and dewpoint: These modes are used to enter a data pair representing a low dewpoint and the sensor attenuation measured at this low dewpoint.
Section 3: Instrument b. Use the UP or DOWN buttons to modify the cal-adjust value as necessary. c. Press the MODE button to go to the next mode, this will save the new cal-adjust value, and it will be retained even if power is turned off. 6. Analog Output Span selection 4/20 mA or 0/24 mA: By pushing the UP or DOWN buttons, the user may select the desired span of the analog output. 7.
8800 Series Trace Moisture Analyzer Instruction Manual four times will display “1234”. Pressing and holding the “MODE” button, will display “SET UN/ LOC”, indicating that the instrument is now unlocked. It may be locked without the password, same as any other instrument. Note: To avoid unauthorized changes, it is imperative that instrument is returned into the locked mode. 11.
Section 3: Instrument • dition ceases to exist, the audio indicator is automatically re-enabled, ready to be activated on next alarm condition. A momentary TEST button on the front panel allows testing both the visual and audible indicators. 3.6 Troubleshooting the Instrument This instrument performs diagnostic tests on power up as well as once every two minutes. The table that follows, depicts all possible error/unexpected messages that may be displayed on the instrument.
8800 Series Trace Moisture Analyzer Instruction Manual DISPLAY EXPLANATION REQUIRED ACTION + PROM check sum failed. HI ERR + RAM write/read test failed. % ERR + Unidentified power-up failure. C.S.F/ + EEPROM Check Sum Failed. return to your representative ERR/AD + A/D converter failure. for service. ERR/REF + Reference voltage for A/D out of spec. LO/BAT + Low supply voltage. LO RNG/ TEMP + Instrument low temperature range has been exceeded.
Section 3: Instrument 3.7 Maintenance The 8800A and 8800B instrument enclosures may be cleaned when necessary using a damp (moist) cloth. The sensor should not be cleaned as it may be damaged. Spare parts may be ordered through your representative.
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Glossary Glossary 0/24 mA . . . . . . . . . . . . . . . . range of current for the current loop [0mA=minimum reading, 24mA=maximum reading] 4/20 mA . . . . . . . . . . . . . . . . range of current for the current loop [4mA=minimum reading, 20mA=maximum reading] - preferred because less than 4mA can indicate a fault or open circuit, also there is at least 4mA available to power equipment 7 segment . . . . . . . . . . . . . . .
Manual used for the circuit [see 4/20] dB . . . . . . . . . . . . . . . . . . . . . see - decibel DB25 . . . . . . . . . . . . . . . . . . . a style and size of connector - in this case with 25 pins DB9. . . . . . . . . . . . . . . . . . . . a style and size of connector - in this case with 9 pins decibel . . . . . . . . . . . . . . . . . . a dimensionless unit representing the logarithm of the ratio of two values DEMKO . . . . . . . . . . . . . . . .
Glossary impedance . . . . . . . . . . . . . . . the ratio of voltage to current at a specified frequency measured in Ohms, a resistor of the same value would act the same as the measured circuit in-situ . . . . . . . . . . . . . . . . . . measurement with sensor located in the process stream intrinsically safe . . . . . . . . . . incapable of releasing enough electrical or thermal energy to cause the ignition of flammable substances listed for a hazardous area classification LBS H2O/mmscf. . . . . . . . .
Manual RG6 . . . . . . . . . . . . . . . . . . . . A type of coaxial cable - the letters/numbers refer to the electrical characteristic of the cable [resistance/capacitance per foot of length] RS-232C . . . . . . . . . . . . . . . . a specification for electrical signaling [also referred to as RS232] that describes the voltages, rate of change of the voltages, and the signal names and uses for the signals RTS . . . . . . . . . . . . . . . . . . . .
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Appendix A: Flow Diagram of Operating State User Interface 30 seconds anywhere (other than "Calibration") without key press Power ON initialization and sign on message appears when changing settings of locked unit Toggle Pressure Correction HI/LO ˚C PSI 1/2 sec Viewing Dewpoint Flashing PSI indicates pressure corrected dewpoint { Flashing HI and/or LO indicates corresponding relays not energized DEWPOINT units SHORT PRESS LONG PRE
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Flow Diagram Operating State User Interface (continued) Manual & Scheduled Self Calibration Flow diagram items not related to Self Calibration are shaded in gray.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Appendix B: Flow Diagram of Set-Up State User Interface Power-Up with MODE key depressed Power ON initialization and sign on message appears when changing settings of locked unit 4 min anywhere without key press go to Operating State Choose alternate units to show when displaying dewpoint. SET blank F C ppm LBS G/m3 PSI % CF Temp F Temp C { Factory default is blank, (there is no alternate display).
cable with molded-on male BNC connector Viton A O-ring female BNC connector 500P C- D TE LIS NM 76 2.230" 3" min 1 flats for 1 / 4 " wrench ~1.45" HP 40 3/4"-16 14mm x 1.25mm 8800 Series Trace Moisture Analyzer Instruction Manual Appendices 5/16"-24 tension washer Appendix C: Sensor Mechanical Removable Sensor encapsulated in 100 sintered stainless steel, unscrew to remove.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Appendix D: Optional Sensor Fittings 41
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Appendix E: 8800 Series Trace Moisture Analyzer Circuit Board Dimensions 4.250" 3.875" 3.502" 0.155" Optional Key Pad Connector 0.146" 0.335" 0.195" 2.125" TOP VIEW SIDE VIEW 0.44" 0.627" C US 0.965" DEWPOINT TRANSMITTER 0.662" M O D E 1 C L Y LA SP I D C L S2 0.740" 2.315" S1 A In udi di o ca to r 1.030" 0.805" 1.853" 1.453" 1.052" R S3 0.5" 2.140" J.F.M.A.M.J.J.A.S.O.N.D 4.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices sions Standard mounting (with clip-on compression brackets) Environmentally sealed mounting (with gasket and clip-on screw clamp mounting brackets) 43
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Appendix E (continued): 8800B Series Trace Moisture Analyzer Enclosure Mounting Dimensions 44
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Appendix F: Sensor/SpanCheck™ Theory of Operation ns o Se ew N Capacitance (nF) The Sensor is constructed as a capacitor whose dielectric consists of porous Aluminum Oxide as well as the gas that has entered in the pores of the Aluminum Oxide.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Appendix G: Dewpoint Response time Analysis Manufacturers of dewpoint sensors will make unbelievable claims of speed. But without supporting data revealing the conditions under which the measurements were made, such as flow rate, temperature, the dewpoint at which the test was performed, and most importantly the units of measure. This last aspect can be extremely deceiving, consider the following example.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Of course analyzing on a wet-up step will produce much faster results, because all sensors are fast on wet up, since Al2O3 (like most materials) adsorbs faster than it desorbs. Testing with a small step e.g. in the -10°C to 0°C dewpoint range will produce even faster results, and allow manufacturers to make far-fetched claims of response time of 5seconds for a 90% of step change.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Appendix H: Sample Gas Filter Considerations Sample treatment with pre-filtering may be a necessity in many instances. However the filter housing and element may affect the dewpoint reading and/or the response time of the system. Below is a graph comparing measurements from the same calibrated sensor with and without a filter utilizing a polycarbonate bowl. All other parameters, which may affect the measurement, were kept constant.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Appendx I: 8800 Series Trace Moisture Analyzer Grounding Considerations Sensor Measuring Circuitry 0.1uf 1M Ohm 33V 400W Not Connected 4 AC GROUND 5 SIG-IN 6 SIG-RET 7 A-OUT Earth Safety Ground Facility AC Power o AC NEUTRAL 3 white lo RFI filter board AC LIVE 2 d 0.0047uf 1 un 275VAC Sensor black 8 A-RET 9 TxD N O T cause gro Module 0.0047uf 0.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Appendix J: Analog Output vs. Dewpoint The current output of the 8800 Series Trace Moisture Analyzer, varies with the measured dewpoint.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Relationship of 4-20mA output and instrument reading in ppmV or LBS Instrument reading in ppmV = ra ng e -6 5. 5˚ C Lo w AO ra ng e = 4.5mA 4.1mA 0.1 ˚C C 0˚ ge h g Hi AO n ra = +2 289.1 LBS = 0˚C = 6063.8 ppmV 4/20 mA output 5mA 10000 49.3 LBS = -20˚C = 1019.3 ppmV 8mA 1000 1.97 LBS = -50˚C = 38.83 ppmV 0.56 LBS = -60˚C = 10.66 ppmV 12mA 100 Hi gh AO 20mA -3 8.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Appendix K: RS-232C Interface Protocol The instrument uses a simple protocol to communicate to a host computer through its RS-232C interface, see section 3.3.2.5 for electrical connections. The interface is configured as 9600 baud, Even Parity, 8 Bits, 1 Stop; and it echoes all received characters. To illustrate the protocol, the following notation conventions are used in this section: The characters sent or received are depicted in bold.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices 255 seconds. This feature allows the user to log the measurement on a dumb terminal or a printer. The mode argument is optional and may be specified only if an interval was specified. It may be “N” for numeric reporting or “G” for graphic reporting of the measurement. The mode argument defaults to numeric mode.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices The printer should have at least 80 character columns, and it is best to use continuous form paper. “?” command Requests a single report of the measurement in the currently selected format. send:?CR The unit will respond in the format selected with the Data command, for example: receive: BL-59.3degCSP01:23:45SPNoAlrmCRLF The default factory setting for the instrument is to respond in numeric format in the user chosen units.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Appendix L: Procedure for Exchanging 8800 Series Sensors To exchange sensors one must know the measured low attenuation of the sensor at some low dewpoint as well as the calibration adjustment value. These numbers can be found on the shipping container serial number label. Through the following steps it is helpful to refer to Appendix A: Flow Diagram of 8800 Series Trace Moisture Analyzer Set-Up State User Interface 1.
8800 Series Trace Moisture Analyzer Instruction Manual Appendices Appendix M: Uncertainty in LBS & ppmV calculations Uncertainty of LBS & ppmV calculations due to +/-3˚C measurment accuracy 29 48 44 38 34 600 1000 900 800 700 24 19 15 10 5 2.5 1 0.5 0.25 0.1 0.
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Index Symbols °C .........................................................17 °F ..........................................................17 A AC power voltage ................................10 accuracy °C,°F specification .............................4 calculated lbs or ppmV ....................56 adjusting low sensor attenuation and dewpoint ..............................26 alarms checking ...........................................19 present setup ....................................19 relay contacts .
Index copper tubing .........................................6 copyright .................................................i corrosive gases .................................3, 20 CSA ......................................................13 cUL ........................................................4 current loop computations ....................................50 linearity ............................................50 load ...................................................14 range setting ..............
Index NPL ........................................................1 O oil ...........................................................3 operating state ......................................17 operating state flow diagram ................37 optionally ordered features/capabilities .1 outdoor installation ................................9 outputs ..................................................10 overview .................................................1 P parts per million by volume .................
Index W warning labels ...................................... iii warranty ................................................iv water .......................................................3 weather proofing ....................................9 weight ...................................................10 wiring .....................................................9 alarm relay contacts .........................13 analog output ....................................14 power ....................................
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