ENMET Corporation PO Box 979 Ann Arbor, MI 48106-0979 www.enmet.
CONTENTS 1 WARNING NOTICES ........................................................................................................................1 1.1 1.2 1.3 1.4 1.5 1.6 BATTERY CHARGING, CALIBRATION & TESTING .................................................................................1 ELECTROSTATIC HAZARD .................................................................................................................1 BATTERY DISPOSAL .............................................................
10.1 INFRARED SENSORS ......................................................................................................................18 10.1.1 10.1.2 10.1.3 10.2 TOXIC SENSORS ............................................................................................................................19 10.2.1 10.2.2 10.2.3 10.2.4 10.3 LEL Flammable Sensor Specification.................................................................................................
ENMET Corporation 1 1.1 PGD3-IR WARNING NOTICES Battery Charging, Calibration & Testing Equipment used for charging, calibration and testing of the Portable Gas Detector must be located outside a hazardous area i.e. in an atmosphere where it is known that there is no risk of the presence of combustible gas. 1.2 Electrostatic Hazard The blue plastic instrument case and red lens must only be cleaned in a safe area. 1.
ENMET Corporation 2 PGD3-IR CERTIFICATION DATA The Portable Gas Detector type PGD3-IR is Baseefa ATEX certified for use in Class 1, Div 1, Groups A, B, C, D potentially explosive atmospheres under the following certificate number: Certificate No. Baseefa 03ATEX0235X The infrared sensors fitted to the PGD3-IR are ‘EEx d’ certified and must only be replaced with sensors labelled with the following details:Certificate No.
ENMET Corporation 5 PGD3-IR INTRODUCTION This Instruction Manual provides information on the General Operation of the PGD3-IR instrument. 5.1 Specification Size 7.25” high x 4.25” wide x 1.95” deep (185mm x 108mm x 50mm) excluding case Weight 28 oz (1Kg) No. of Gases Up to four. Gas Types Flammable, Toxic (including Carbon Dioxide), Oxygen, (See section 10 for sensor specifications). Internal Pump Available option, to order (suffix P). 3.5 Volts dc.
ENMET Corporation 5.5 PGD3-IR Confined Space Pre-entry Checks The area to be investigated prior to entry can be checked in two ways: i). Peak Reading Mode With the instrument selected for this mode as described in Section 6.3, it can be lowered into the confined space. It should be left there for a minimum period of 1 minute; upon withdrawal the display will show the maximum readings obtained for the flammable and toxic sensors. See peak reading Section 6.3 regarding oxygen reading.
ENMET Corporation PGD3-IR Rear Cover Retaining Screws – 3 Positions Nameplate with Serial Number Battery Retaining Screws – 3 Positions Rechargeable Battery Pack Charging Pins Figure 3 - Rear View of Rechargeable Portable Gas Detector with Case Removed Reference to Figures 1 to 3 shows that the instrument comprises the following main parts: • The main instrument case moulded in high impact resistance “Bayblend” internally coated to provide electromagnetic shielding.
ENMET Corporation 6 PGD3-IR OPERATING INSTRUCTIONS FRONT PANEL SWITCHES A B C D TOP PANEL SWITCHES E 6.1 F Switching on To switch the instrument on, press buttons A and D together. The instrument goes through a self-check cycle, check that the audible and visual alarms are operating and that the display shows the following sequence: Example CHECKING PROGRAM PGD V5.0.0 FLAM = METHANE Note - The top line of this display will vary according to the software and instrument configuration.
ENMET Corporation 6.3 PGD3-IR Peak Readings mode The instrument can be set to measure and hold the highest flammable and toxic gas readings. For oxygen sensor the highest and lowest readings are held. This feature is particularly useful for carrying out pre-entry testing for gas. For example, by lowering the instrument into a manhole and then withdrawing it to observe the peak readings to ensure that it is safe to enter.
ENMET Corporation 6.4 PGD3-IR Menu facilities The Menu button allows the instrument information to be displayed, examples are listed below. These are sequentially selected by successive operation of button D: A B C D DATE / TIME PUMP ON/OFF* CALIBRATION DUE DATE STEL & TWA VALUES ALARM LEVELS SET LCD CONTRAST PGD SERIAL No. *when unit is supplied with the internal pump.
ENMET Corporation 6.7 PGD3-IR STEL and TWA (LTEL) Values The current STEL and TWA (LTEL) values may be viewed via the menu button (Section 6.4). These values represent the calculated Short Term Exposure Levels (STEL) and Time-Weighted-Average (TWA)/Long Term Exposure Levels (LTEL) for the toxic gases to which the user has been most recently subjected.
ENMET Corporation 6.8 PGD3-IR Alarm Levels The alarm level settings for the instrument may be viewed via the menu button. These values represent the alarm set-points which have been programmed into the instrument at the factory. Press the menu button until, the user is prompted to press the up arrow key to view the readings: ALARM LEVELS PRESS [ ] KEY Sequential operation of the up arrow key shows in turn the alarm set points for each sensor.
ENMET Corporation 6.9 PGD3-IR Flammable Display The gas detector is calibrated to provide an output signal linearised for methane during manufacture. The flammable infrared sensor cannot detect hydrogen because this gas is not infrared active. However, Hydrogen can be detected up to 100% LEL by the inclusion of an appropriate electrochemical sensor. However the gas detector will also respond to a range of hydrocarbon gases.
ENMET Corporation 6.12 PGD3-IR Alarm Accept The instruments’ alarm condition is indicated by the red lens section flashing once per second together with a continual audible sound. For the gas causing the alarm, the display alternates between the measured level and a blank reading. For example, for an LEL alarm: H2S CO2 0.0 0 ▐ ▐ LEL O2 23 20.9 H2S CO2 0.0 0 ▐ ▐ LEL O2 20.
ENMET Corporation 6.16 PGD3-IR EXP / LEL / VOL Display options The display format for the flammable sensor can be configured to read in either of the following modes:Both of these modes display the flammable sensor reading as a % of EXP or LEL the Lower Explosive Limit (LEL) for the gas being measured. This mode displays the flammable sensor reading as a concentration of the gas being measured in % volume.
ENMET Corporation 7 PGD3-IR PUMPED INSTRUMENTS Instruments having the pump option are fitted with an integral pump inside the lens. When the pump is switched on the gas sample is drawn through one sensor inlet and exhausted through the opposite sensor inlet such that all of the sensors are exposed to the gas sample. There are two different types of accessories available for use with pumped instruments, either an aspirator or aspirator probe. 7.1 Pump Operation Turn the instrument on.
ENMET Corporation 8 PGD3-IR CALIBRATION CAUTION: PGD3 Instruments require that all active channels be calibrated after entering the calibration program. Do Not enter the calibration program unless all calibration materials are available. Failure to calibrate an active channel will cause a fault condition. See section 8.3 for examples of standard ENMET calibration gases. 8.
ENMET Corporation PGD3-IR In approximately 60 seconds the display will change to: ZEROING SENSORS PLEASE WAIT Then progress through all active channels. CAUTION: If you choose [ ] OK you must calibrate all active channels. Make sure all required materials are available. The PGD3 instrument enters the Span/Calibrate gas selection. The display will show the last concentration of gas used for calibration.
ENMET Corporation 8.3 Part number 03296-209 03220-050 03220-199 03314-020 03223-2000 03302-010 03331-010 02506-002 02506-004 03700-041 03700-046 03700-048 03700-050 9 PGD3-IR Examples of standard ENMET Calibration Gas & Accessories Description Gas Cylinder, Clean Air/Zero Gas, 20.
ENMET Corporation 10 10.1 PGD3-IR SENSORS Infrared Sensors The PGD3-IR instrument is fitted with miniature infrared sensors for the detection of flammable gases (except hydrogen) and carbon dioxide. The instrument can house up to 2 infrared sensors. They are ‘EEx d’ certified types and must only be replaced with sensors labelled with the certification details stated in section 2 of this manual. The flammable sensors are non-selective that is, they will detect a range of hydrocarbon gases.
ENMET Corporation 10.2 PGD3-IR Toxic Sensors The PGD3-IR instrument can be fitted with either one or two toxic gas sensors as detailed in the following sections. The toxic gas sensors are of the three-electrode electrochemical type and are designated as either the ‘3-series’ or ‘4-series’ (miniature) toxic sensors.
ENMET Corporation PGD3-IR 10.2.4 Toxic Sensor Types and Characteristics Carbon Monoxide (CO) Type No’s Nominal Range Resolution T90 Response Time Inboard Filter (Y/N) 4CF 0-500ppm 1ppm <20 secs Yes 3E 0-1000ppm 0.5ppm <25 secs No Type No’s Nominal Range Resolution T90 Response Time Inboard Filter (Y/N) 3E/F 0-1000ppm 0.
ENMET Corporation 10.3 PGD3-IR Oxygen Sensors WARNING: The instrument is not designed for use in oxygen enriched atmospheres i.e. greater than 21% oxygen. The PGD3-IR instrument may be fitted with the oxygen sensor detailed in the following section 10.3.5 to allow measurement of oxygen deficiency. The oxygen sensor is contained within a blue coloured plastic moulding normally located behind the instruments’ right hand side gas inlet as viewed from the front. 10.3.
ENMET Corporation 11 PGD3-IR TROUBLESHOOTING The following is a guide to troubleshooting during normal operation. For information about troubleshooting during calibration, configuration and/or programming refer to Instruction Manual 2. FAULT PGD Instrument will not switch on. POSSIBLE CAUSE Rechargeable battery discharged. Faulty switch panel. Faulty electronics. REMEDY Recharge battery. Toxic sensors reading “HIGH”. Storage of PGD without power i.e. with discharged battery pack.
ENMET Corporation 12 PGD3-IR WARRANTY ENMET warrants new instruments to be free from defects in workmanship and material under normal use for a period of one year from date of shipment from ENMET. The warranty covers both parts and labor excluding instrument calibration and expendable parts such as calibration gas, filters, batteries, etc... Equipment believed to be defective should be returned to ENMET within the warranty period (transportation prepaid) for inspection.
PO Box 979 680 Fairfield Court Ann Arbor, Michigan 48106-0979 734.761.1270 Fax 734.761.3220 Returning an Instrument for Repair ENMET instruments may be returned to the factory or any one of our Field Service Centers for regular repair service or calibration. The ENMET Repair Department and Field Service Centers also perform warranty service work.
Repair Return Form Mailing Address: ENMET Corporation PO Box 979 Ann Arbor, Michigan 48106 Phone Number: FAX Number: Shipping Address: ENMET Corporation Attn: Repair Department 680 Fairfield Court Ann Arbor, Michigan 48108 734.761.1270 734.761.
