PhD6 Multi-Gas Detector Reference Manual - Honeywell Analytics

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consideration is particularly important when traceor hard to detect materials (higher correctionfactor (CF) are present in highly contaminatedbackgrounds. In this case the PID would be apoor choice for detection of the target gas/vapor.Correction factors in the PHD6onboard PID library for various, common VOCsand gases should be considered as approximate.The PHD6 with PID has been fully tested andvalidated only for performance with isobutylene.For other materials requiring verified accuracy itis necessary to calibrate the detector to thegas/vapor to be monitored directly. Further ifusing remote sample draw and/or physicalconditions in the field that differ from ambient, toperform calibrations as close to the physical andactual setup conditions as possible.The convention in the gas detection industryis to calibrate the PID sensor to a knownconcentration of isobutylene and (asrequired) to use response factors or to selectthe scale of target gas from a preprogrammedmenu. Sensitivity scale isdisplayed on the channel with 7 characterdesignation whether it is isobutylene oranother material.2.7.1 Displayed VOCTo change the displayedVOC, first enter the BasicMenu by holding the MODEbutton to turn the PHD6 off.When “Release MODE toShut Down” is shown,continue to hold the MODEButton until the Basic Menuis shown.At the Basic Menu press the down arrow once toselect “Displayed VOC”. A list of Volatile OrganicCompounds will be shown. Use the navigationarrows to highlight the appropriate VOC andpress MODE to select it. The new VOC will beshown when the PHD6 is restarted.2.7.2 Specified VOC Calibration GasTo change the calibration gas for PID sensor,follow the instruction in section 5.2.1 to reach theMain Menu. Then access the Calibration Menufollowed by the Gas Values submenu. Once inthe Gas Values submenu, select the VOCsensor. Then select Cal Gas Type and specifythe appropriate compound and amount forcalibration.2.8 Special Instructions for NDIRsensorsTwo NDIR sensors are available for the PHD6:One for the detection of carbon dioxide (CO 2 ),and one for the detection of methane (CH 4 ).2.8.1 Special Calibration Requirement forNDIR CO 2 (Carbon Dioxide) SensorUnlike most sensors the Infrared CO 2 sensorrequires two different gas sources to fullycalibrate the instrument. The reason for this isthat it is effectively impossible to zero calibrate aCO 2 detector in ambient air because there is anunknown and varying amount of background CO 2present in the atmosphere.See section 4.4 for more details.2.8.2 Special Consideration for IR CH 4Methane sensor gas calibrationThe NDIR-CH 4 sensor is designed specifically forthe detection of methane. Gas calibration shouldalways be done with methane calibration gas atthe actual amount of methane shown on thecylinder. See section 4.5 for details.2.8.3 Hydrogen Warning for IR CH 4 MethaneSensorUnlike other types of sensors used to measurecombustible gases and vapors, the IR CH 4 sensorused in the PHD6 does not respond to hydrogen.Do not use the NDIR CH 4sensor for the detection of hydrogen. Unlikecatalytic hot-bead LEL sensors, the NDIR CH 4sensor in the PHD6 does not respond tohydrogen. Use the of the NDIR CH 4 for thedetection hydrogen may lead to propertydamage, personal injury or death.3. SamplingThe PHD6 may be used ineither diffusion or sample-drawmode. In either mode, the gassample must reach the sensorsfor the instrument to register agas reading. The sensors arelocated on the front of theinstrument near the bottom in avented compartment.The sensorports must be kept free ofobstruction. Blocked sensorports can lead to inaccurateand potentially dangerousreadings.15
In diffusion mode, the atmosphere beingmeasured reaches the sensors by diffusingthrough vents in the instrument. Normal airmovements are enough to carry the sample tothe sensors. The sensors react quickly tochanges in the concentrations of the gases beingmeasured. Diffusion-style operation monitorsonly the atmosphere that immediately surroundsthe detector.The PHD6 can also be used to sample remotelocations with either the hand-aspirated sampledrawkit, or with the motorized sample drawpump. During remote sampling, the gas sampleis drawn into the sensor compartment through theprobe assembly and a length of tubing.The PHD6 is deliveredwith a sample draw kit that contains 10 feet/3meters of polyester urethane (fuel-resistant)tubing part number 53-001. This material iscompletely compatible with commoncombustible gases/vapors, and the toxicgases CO and H 2 S. When using the PHD6with a sample draw pump or kit to samplewith any of the gas types and tubing lengthslisted in the chart below, FEP-Lined Tubing(part number 53-036) should be used.connect the sample draw accessories system tothe PHD6.Note: The maximum amount of tubing thatcan be used with the manual sample draw kitis 50 feet/15 meters.Gas TypeCL 2 , CLO 2HCNPID, SO 2 , NO, NO 2 ,PH 3 , NH 3Tubing LengthUp to 10 ft/3m Max.Up to 100 ft/30mMax.> than 10 ft/3m up to100 ft/30m Max.Standard polyester urethane (fuel-resistant)tubing (part number 53-001) can be usedotherwise. Use of other types of tubing maycause inaccurate and potentially dangerousreadings that could result in serious injury ordeath.For sampling using a PID sensor please referto the Application Note titled “Usage andApplications of PID sensors version B1”included with your PhD documentation orcontact customer service at 800-711-6776 torequest a copy.Do not use the NDIR CH 4sensor for the detection of hydrogen. Unlikecatalytic hot-bead LEL sensors, the NDIR CH 4sensor in the PHD6 does not respond tohydrogen. Use of the NDIR CH 4 for thedetection of hydrogen may lead to propertydamage, personal injury or even death.3.1 Manual sample draw kitThe manual sample draw kit is comprised of asample draw probe, 2 sections of tubing, asqueeze bulb and an adapter that is used to16
Page 1 and 2: PHD6Gas DetectorReferenceManualHone
Page 3 and 4: Table of ContentsCERTIFICATION INFO
Page 5 and 6: Appendix B Calibration Frequency Re
Page 7 and 8: 1. DescriptionThe PHD6 is a multi-s
Page 9 and 10: operation, and the visible and audi
Page 11 and 12: 1.10 PHD6 standard accessoriesStand
Page 13 and 14: TimeBattery Status IconThe battery
Page 15: 2.5.5 Low Battery AlarmsWhen the ba
Page 19 and 20: →Block the sampling inlet by plac
Page 21 and 22: Fresh air/zero calibrationsmay only
Page 23 and 24: educed oxygen level in the calibrat
Page 25 and 26: two arrow keys while the two blocks
Page 27 and 28: The datalogger samples continuously
Page 29 and 30: 3. Remove the four screws that are
Page 31 and 32: 6.6.1 Replacing pump filters1. Remo
Page 33 and 34: Appendix B CalibrationFrequencyReco
Page 35: Honeywell Analytics Warranty Gas De

PhD6 Multi-Gas Detector Reference Manual - Honeywell Analytics

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