4pgd3-ir – ENMET PGD2Manual.pdf User Manual
Page 5
ENMET Corporation
PGD3-IR
2
2
C
ERTIFICATION
D
ATA
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. SIRA 04ATEX1357U
I M2 EEx d I II 2 G EEx d IIC
3
D
EFINITIONS AND
A
BBREVIATIONS
Aspirator
A hand operated pump attachment which enables gas to be drawn into the instrument.
EXP
Explosive Gas.
Infrared
Sensor technology used to detect flammable gases and carbon dioxide. These
sensors are immune to chemical ‘poisoning’. Note that Infrared sensors cannot be
used to detect hydrogen.
LEL
Lower Explosive Limit, the volume ratio of flammable gas or vapour in air below which
an explosive gas atmosphere will not be formed.
%LEL
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)
TWA(LTEL)
Time-Weighted-Average, taken over an 8 hour reference period. Also referenced as
LTEL, Long Term Exposure Limit.
PPM
Parts per million.
STEL
Short Term Exposure Limit, the average exposure over a 15 minute sampling period.
T
90
Response Time
The time taken to reach 90% of the true value
4
PGD3-IR
F
EATURES AT A
G
LANCE
♦
Monitoring of up to 4 gases
♦
Can house up to 2 infrared sensors in the same instrument
♦
Pumped versions available
♦
Robust construction - high impact resistance
♦
Monitoring (STEL and TWA[LTEL])
♦
Peak readings facility for pre - entry testing
♦
Displays in scientific units
♦
Factory set alarm levels for each sensor
♦
Audible and visual alarms
♦
Sensor zero function
♦
Serial number and calibration due dates stored within instrument
♦
Display contrast adjustable via instrument menu
♦
Display backlighting
♦
Power and Fault indicators
♦
Low battery alarm
♦
Accessories to provide aspiration
♦
Protective rubber case and body harness