ENMET PGD2 User Manual
ENMET Corporation
PO Box 979
Ann Arbor, MI 48106-0979
www.enmet.com
Operation and Maintenance
PGD2
Manual
Manual Part Number
80006-020
MCN-13-001, 04/04/13
CONTENTS
1 WARNING NOTICES ..................................................................................................................................................................... 1
1.1 S
1.2 B
1.3 E
1.4 B
1.5 D
1.6 E
1.7 R
ENSOR “POISONING
ATTERY CHARGING, CALIBRATION & TESTING
LECTROSTATIC HAZARD
ATTERY DISPOSAL
ISPOSAL OF GAS SENSORS
LECTROMAGNETIC COMPATIBILITY
APID READING CHANGES
” ................................................................................................................................................................. 1
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2 CERTIFICATION DATA ............................................................................................................................................................... 1
2.1 S
PECIAL CONDITIONS FOR SAFE USE
........................................................................................................................................... 1
3 DEFINITIONS AND ABBREVIATIONS ..................................................................................................................................... 2
4 PGD2 FEATURES AT A GLANCE ............................................................................................................................................... 2
5 INTRODUCTION ............................................................................................................................................................................ 3
5.1 S
5.2 G
PECIFICATION
ENERAL DESCRIPTION
............................................................................................................................................................................ 3
.............................................................................................................................................................. 4
6 OPERATING INSTRUCTIONS .................................................................................................................................................... 6
6.1 S
6.2 S
6.3 P
6.4 S
6.5 M
6.6 D
6.7 A
6.8 C
6.9 STEL
6.10 A
6.11 F
6.12 S
6.13 PGD S
6.14 A
6.15 L
6.16 D
6.17 S
6.18 EXP / LEL / VOL
6.19 C
6.20 U
6.21 D
6.22 O
6.23 F
6.24 A
WITCHING ON
WITCHING OFF
EAK READINGS MODE
ENTINEL WORKING MODE
ENU FACILITIES
ATE / TIME
DJUST SOUNDER
ALIBRATION DUE DATE
AND
LARM LEVELS
LAMMABLE DISPLAY
ET
LCD C
ERIAL NO
LARM ACCEPT
OW BATTERY ALARM
ISPLAY BACKLIGHT
ENSOR ZERO
ONFIDENCE BLEEP
SER IDENTIFICATION
ATA LOGGING
VERRANGE INDICATION
AULT INDICATION
SPIRATION
............................................................................................................................................................................ 7
........................................................................................................................................................................... 7
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TWA V
ALUES
........................................................................................................................................................................ 10
............................................................................................................................................................... 11
ONTRAST
................................................................................................................................................................. 12
. ...................................................................................................................................................................... 12
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DISPLAY OPTIONS
.................................................................................................................................................................. 13
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7 PUMPED INSTRUMENTS .......................................................................................................................................................... 16
7.1 P
7.2 P
UMP OPERATION
UMP BLOCKAGE
..................................................................................................................................................................... 16
...................................................................................................................................................................... 16
8 CALIBRATION ............................................................................................................................................................................. 17
8.1 C
8.2 K
8.3 E
ALIBRATION
EYPAD CALIBRATION PROCEDURE
XAMPLES OF STANDARD
............................................................................................................................................................................ 17
ENMET C
......................................................................................................................................... 17
ALIBRATION GAS & ACCESSORIES
................................................................................... 19
9 BATTERY CHARGING EQUIPMENT ...................................................................................................................................... 19
9.1 C
9.2 5-W
9.3 V
9.4 C
9.5 B
OMPACT CHARGER TYPE
AY CHARGER TYPE
EHICLE-MOUNTED CHARGER TYPE
HARGER TYPE
ATTERY MODULE CHARGING
PGDC2, PGDC2/I .......................................................................................................................................... 20
PGDC4 .......................................................................................................................................... 20
PGDC5 ............................................................................................................................................... 20
................................................................................................................................................. 20
PGDC3 .......................................................................................................................... 20
10 BATTERY REPLACEMENT .................................................................................................................................................. 20
11 HAZARDOUS AREA USE ....................................................................................................................................................... 21
11.1 A
11.2 M
11.3 B
11.4 C
12 SENSORS ................................................................................................................................................................................... 22
12.1 F
12.2 T
12.3 O
13 CALIBRATION, CONFIGURATION & PROGRAMMING ............................................................................................... 27
REAS OF USE
ETHODS OF USE
ASIC PRECAUTIONS
ONFINED SPACE PRE-ENTRY CHECKS
LAMMABLE SENSORS
12.1.1 LEL Flammable Sensors .................................................................................................................................................. 22
12.1.2 0 - 100% Volume Flammable Sensors ............................................................................................................................. 23
OXIC SENSORS
12.2.1 Cross Sensitivity ............................................................................................................................................................... 24
12.2.2 Temperature Dependence ................................................................................................................................................ 24
12.2.3 Stabilization ..................................................................................................................................................................... 24
12.2.4 Toxic Sensor Types and Characteristics .......................................................................................................................... 25
XYGEN SENSORS
12.3.1 Cross Sensitivity ............................................................................................................................................................... 26
12.3.2 Temperature ..................................................................................................................................................................... 26
12.3.3 Pressure Transients .......................................................................................................................................................... 26
12.3.4 Humidity ........................................................................................................................................................................... 26
12.3.5 Oxygen Sensor Types and Characteristics ....................................................................................................................... 26
........................................................................................................................................................................... 21
...................................................................................................................................................................... 21
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13.1 PC I
13.2 C
13.3 C
13.4 P
14 TROUBLESHOOTING ............................................................................................................................................................ 28
15 WARRANTY .............................................................................................................................................................................. 29
NTERFACING (USING OPTIONAL ACCESSORIES
ALIBRATION
ONFIGURATION (USING OPTIONAL SOFTWARE & HARDWARE
ROGRAMMING (USING OPTIONAL SOFTWARE & HARDWARE
............................................................................................................................................................................ 27
).................................................................................................................. 27
) ............................................................................................... 27
) ................................................................................................. 27
ENMET Corporation PGD2
1 W
ARNING NOTICES
1.1 Sensor “Poisoning”
Silicone based lubricants, corrosion inhibitors and water repellents must not be used in close proximity to the sensors. Such
compounds may poison the flammable sensors (pellistors) resulting in a loss of sensitivity.
This poisoning effect is common to all catalytic sensors.
1.2 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.
1.3 Electrostatic Hazard
The blue plastic instrument case and red lens must only be cleaned in a safe area.
1.4 Battery Disposal
Rechargeable battery packs or individual cells must be disposed of via an appropriate battery recycling scheme.
1.5 Disposal of Gas Sensors
The toxic and oxygen sensors used in the PGD2 contain toxic compounds. They should be disposed of according to local waste
management requirements and environmental legislation. They should not be burnt since they may emit toxic fumes.
Flammable sensors do not represent a hazard.
1.6 Electromagnetic Compatibility
The PGD2 Portable Gas Detector and associated equipment complies with the current European standards for both electromagnetic
emissions and immunity. However, this does not imply that the apparatus will be immune from interference under all operational
conditions and may exhibit temporary instability if exposed to high levels of interference for example, when in very close proximity to a
mobile phone transmission.
1.7 Rapid Reading Changes
FLAMMABLE INSTRUMENTS ONLY
CAUTION: ANY RAPID UP-SCALE READING FOLLOWED
BY A DECLINING OR ERRATIC READING MAY INDICATE
A GAS CONCENTRATION BEYOND UPPER SCALE LIMIT
WHICH MAY BE HAZARDOUS.
2 C
The Portable Gas Detector Model PGD2 is Baseefa ATEX certified for use in Group IIC potentially explosive atmospheres under the
following certificate number: Certificate No. Baseefa 03ATEX0235X
ERTIFICATION DATA
2.1 Special Conditions for Safe Use
The above certificate specifies the following conditions for safe use:-
1. The rechargeable battery pack Type PGD/BATT may only be recharged in the safe area.
2. The enclosure is manufactured from plastic and has a surface resistivity of greater that 1 Gohm and therefore poses a risk
from electrostatic ignition. The rubber boot is to be fitted to the apparatus. By virtue of its shape and design, the apparatus is
not considered to be an electrostatic risk; however, the apparatus must not be installed in a position where it may be
subjected to an excessive air/fluid flow or be subjected to rubbing that may cause an electrostatic build-up.
3. The apparatus is not designed for use in oxygen enriched atmospheres i.e. greater than 21% oxygen.
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ENMET Corporation PGD2
3 D
Aspirator
Data Logging
EXP
LEL
%LEL
TWA
PC
Pellistors
PGD2
PPM
STEL
T90 Response Time
EFINITIONS AND ABBREVIATIONS
A hand operated pump attachment which enables gas to be drawn into the instrument.
The automatic recording of readings stored in the solid state memory of the instrument
for later retrieval.
Explosive Gas.
Lower Explosive Limit, the volume ratio of flammable gas or vapor in air below which an
explosive gas atmosphere will not be formed.
The percentage of the Lower Explosive Limit
e.g. the LEL for methane is 5% volume in air, therefore 20% LEL is equivalent to 1%
volume in air (i.e. 20% of 5% volume)
Time-Weighted-Average, taken over an 8 hour reference period.
Also referred to as LTEL, Long Term Exposure Limit
A ‘personal computer’ based on the original IBM standard.
Devices used for the detection of a wide range of flammable gases normally comprising
of individual detector and compensator ‘bead’ elements operating on the principle of
catalytic oxidation.
Portable Gas Detector - 2nd generation, monitoring up to 4 gases.
Parts per Million.
Short Term Exposure Limit, the average exposure over a 15 minute sampling period.
The time taken to reach 90% of the true value
4 PGD2 F
♦ Monitoring of up to 4 gases
♦ Pumped versions available
♦ Sensors can be added or removed after purchase
♦ Robust construction - high impact resistance
♦ Data Logging in 3 modes
♦ STEL and TWA monitoring
♦ Flammable gas selection from built -in menu
♦ Peak readings facility for pre - entry testing
♦ Sentinel working mode
♦ Displays in scientific units
♦ Programmable alarm levels for each sensor
♦ Audible and visual alarms
♦ Sensor zero function
♦ Fully reprogrammable without removal from protective case
♦ Serial number and calibration due dates stored within instrument
♦ Display contrast adjustable via instrument menu
♦ Audible alarm level adjustable via instrument menu
♦ Display backlighting
♦ Power and Fault indicators
♦ Low battery alarm
♦ Choice of mains powered or vehicle powered chargers
♦ Calibration via a PC using specially designed Windows software
♦ Extensive software support
♦ Accessories to provide aspiration
♦ Protective rubber case and body harness
EATURES AT A GLANCE
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ENMET Corporation PGD2
5 I
NTRODUCTION
This Instruction Manual No.1 provides information on the General Operation of the PGD2 instrument.
Instruction Manual No.2 The Data Processing-Calibration-Configuration & Programming of the PGD2 provides information on the use
of the specially designed Windows based software package available for use with the instrument.
5.1 Specification
Size
Weight
No. of Gases
Gas Types
Internal Pump
Power Sources
Minimum operating times
Visual indications
Audible indication
Alarm levels
Data Logging Modes
Display formats
Controls
Temperature range
Environmental Rating
Humidity range
Electromagnetic compatibility
Air Pressure Operating Range
185mm high x 108mm wide x 50mm deep.(excluding boot)
1Kg.
Up to four.
Flammable, Toxic, Oxygen (See section 12 for sensor specifications).
Available to order (suffix P).
3.5 Volts dc.
i). rechargeable battery pack Model PGD/BATT.
12 hours.
i). 2 x 16 character LCD display with backlight.
ii). large flashing red lens section used to indicate alarm conditions.
iii). Green ‘Power’ and amber ‘Fault’ indicators in lens.
Electromagnetic alarm in red lens section.
Flammable : single level instant alarm.
Toxic (each sensor) : 3 levels - instant, STEL, TWA.
Oxygen : 2 levels - instant low, instant high.
Automatic calculation of STEL and TWA readings.
i). Automatic variable rate according to gas levels.
ii). Fixed rate.
iii). Fixed fast rate.
iv). Off.
ppm, %, LEL.
i). Front panel - on/off, right arrow, left arrow, on/off/menu.
ii). Top panel - display backlight, alarm mute.
i). operating -5 to + 40
ii). storage -20 to + 50
IP66.
15% to 95% relative humidity, non-condensing. Operation is possible in
the range 0-100% R.H. however, sensor life will be reduced by
continuous operation at extremes of humidity and temperature.
CE Marked, Tested to EN50081-2, EN50082-1, EN55022 (Limit B).
920 mbar to 1150 mbar.
O
O
C.
C.
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ENMET Corporation PGD2
5.2 General Description
The PGD2 is an intrinsically safe portable multi-gas instrument for use in Group IIC potentially explosive atmospheres. The instrument
is intended to be used for the protection of personnel entering or working in an environment where a gas hazard may, or is known to
exist.
The instrument produces both an audible and visual alarms if any of the monitored gas levels fall outside pre-set limits.
It can be fitted with up to 4 gas sensors in various combinations of flammable, toxic and oxygen to provide simultaneous monitoring of
each gas. The data logging facilities available within the instrument allow the exposure levels for each gas to be stored for
downloading to a personal computer at the end of the work period. The instrument also automatically calculates the STEL and TWA
values.
Pumped versions are available at additional cost.
Note: The Model PGD3-IR Portable Gas Detector is also available. This instrument uses the latest technology miniature
infrared gas sensors for the detection of a wide range of hydrocarbon gases and carbon dioxide. Infrared gas sensors offer
several advantages including immunity to ‘poisoning’, fail-safe operation and a longer operating life.
Lens
Gas Inlet
Front Panel
Keypad
Gas Inlet
LCD Display
Figure 1 - Front View of Portable Gas Detector with Case Removed
Figure 2 - Top View Showing Lens Keypad and Certification Data
4
ENMET Corporation PGD2
Battery Pack
Rear Cover Retaining
Screws –
3 Positions
Battery Retaining
Screws –
3 Positions
Nameplate with
Serial Number
Charging Pins
Rechargeable
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. A
belt clip and suspension hook may be optionally fitted during manufacture.
• A removable battery pack.
• A large red lens section containing flashing led indications, audible alarm and infra-red communications link.
• Gas sensors and control electronics (contained in anti-impact mountings) housed within the main instrument case section.
• A two line by 16-character liquid crystal display with backlight.
• A four-key membrane type front panel control switch, large enough to be operated by a gloved hand.
• A two-key membrane type top panel control switch. This membrane also carries the power and fault indicators and certification
data.
• Gas sensor inlets which are separately sealed to help prevent water ingress to the instrument electronics.
• A nameplate carrying the serial number of the instrument
The instrument is supplied fitted with a moulded rubber boot which provides good protection in hostile environments. The instrument
can be both charged and calibrated without removal from the boot. It is a condition for safe use that the boot is always fitted when
used in a potentially explosive atmosphere – see section 2.1.
A body harness is also supplied as standard and comprises shoulder and waist straps which attach to the moulded rubber boot. These
straps can also be utilised to lower the instrument during pre-entry checks.
The instrument is powered from a rechargeable battery pack. It is a condition for safe use that the battery pack may only be
recharged in a safe area – see section 2.1.
5
ENMET Corporation PGD2
6 O
PERATING INSTRUCTIONS
A B C D
FRONT PANEL SWITCHES
TOP PANEL SWITCHES
E F
6
ENMET Corporation PGD2
6.1 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: -
Note : Instruments fitted with PGD1 emulation code do not show PGD2
Note - The top line of this display will vary according to the software and instrument configuration.
*V=1.13 is the software version which may vary
After 2 seconds the display shows the date and time followed by the gas levels.
The gas level display shown depends upon the gas sensors fitted. A typical display for a 4-gas instrument is shown below: -
CHECKING PROGRAM
PGD2 V4.4.2PAp Da
FLAM = METHANE
DATE 10 / 04 / 07
TIME 14 : 12 : 34
H2S 0.0 ▐ LEL 0
CO 0 ▐ O2 20.9
6.2 Switching off
To switch the instrument off, press and hold buttons A and D together until the display goes off.
6.3 Peak Readings mode
The instrument can be set to measure and hold the highest flammable and toxic gas readings and the lowest oxygen reading, 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.
To turn Peak Readings on / off, press buttons B and C together until the display reads: -
either or
PEAK READINGS ON
PEAK READINGS OFF
When Peak Readings is on, the display alternates between :typically and
H2S 0.0 ▐ LEL 0
CO 0 ▐ O2 20.9
PEAK READINGS
6.4 Sentinel working mode
Because of it’s large, 360 degree visible, red alarm top, the instrument can be suspended in a hazardous area to provide protection to
more than one person. Used in this way, all personnel in the vicinity will be able to observe the change in visual flash rate should an
alarm occur.
This method eliminates both the requirement for multi-headed devices traditionally used in the past, or for additional units in order to
achieve sentinel working.
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ENMET Corporation PGD2
6.5 Menu facilities
The Menu button allows the instrument to be interrogated to obtain information on any of the items listed below. These are sequentially
selected by successive operation of button D: -
DATE / TIME
ADJUST SOUNDER
CALIBRATION DUE DATE
STEL & TWA VALUES
ALARM LEVELS
FLAMMABLE DISPLAY
SET LCD CONTRAST
PGD SERIAL No.
If more details are available on a particular item then the user is prompted to press one of the arrow keys as described in the following
sections.
Note that the instrument automatically returns to the gas level display after approximately 4 seconds if the menu button or arrow button
is not operated again.
6.6 Date / Time
The current date and time are momentarily displayed when the instrument is first switched on (Section 6.1) and may also be accessed
via the menu button (Section 6.5).
Changing the date and time can only be carried out via a PGD2 Interface Unit, Interface/Charger Unit or Autocalibration Unit. Refer to
the instruction manuals for the individual items for further details.
6.7 Adjust Sounder
The frequency and hence the volume of the sounder can be adjusted via the menu button. From the menu, the user is prompted to
press the up arrow key:-
Sequential operation of the up arrow key varies the frequency/volume. Pressing the right arrow key sequentially steps the
frequency/volume in the opposite direction.
ADJUST SOUNDER
PRESS [] KEY
6.8 Calibration Due Date
The date when the instrument is due for its next calibration can be viewed via the menu button (Section 6.5).
The PGD2 can be configured via the PC configuration software(optional accessory) to either allow an instrument to be used beyond it’s
calibration due date or to prohibit further use until calibration has been carried out. Where the instrument is set to permit further use, a
warning is given each time the instrument is switched on to alert the user that calibration is required. Where it is set to prohibit further
use, then when the instrument is switched on the alarm continually sounds with the message: -
The calibration due date is updated each time an instrument is calibrated.
CALIBRATION DUE
8
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