Enmet PGD2 Manual de usuario descargar pdf (Pagina 5)

ENMET Corporation PGD2

3 D

EFINITIONS AND

BBREVIATIONS

Aspirator

A hand operated pump attachment which enables gas to be drawn into the instrument.

Data Logging

The automatic recording of readings stored in the solid state memory of the instrument

for later retrieval.

EXP

Explosive Gas.

LEL

Lower Explosive Limit, the volume ratio of flammable gas or vapor 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

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.

Pellistors

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.

PGD2

Portable Gas Detector - 2nd generation, monitoring up to 4 gases.

PPM

Parts per Million.

STEL

Short Term Exposure Limit, the average exposure over a 15 minute sampling period.

Response Time

The time taken to reach 90% of the true value

4 PGD2

EATURES AT A

LANCE

♦ 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

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