ENMET PGD2 - Manual (Page 30)

ENMET Corporation PGD2
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13 C ALIBRATION , C ONFIGURATION & P ROGRAMMING
13.1 PC Interfacing (Using Optional Accessories)
In order to enable the PGD2 to be calibrated, configured and programmed an interface unit is available which provides the means of
communicating with a personal computer.
This interface unit is either in the form of: -
a). a dedicated PGD2 Interface Unit Model PGDCI(option) or,
b). a combined ‘Smart’ charger/PGD2 Interface Unit Model PGDC2/I(option) which allows both battery charging and PC
interfacing to be carried out using a single unit.
The interface units communicate with the PGD2 instrument via infra-red devices housed in the red lens section of the instrument
thereby enabling the instrument to be calibrated, configured and programmed without being removed from it’s protective rubber case.
Communications with the PC is carried out via an RS232 serial port (either ‘Com1’ or ‘Com2’) and is menu driven under Windows 3 or
above using purpose designed software option.
13.2 Calibration
In order to ensure that the PGD2 instrument continues to provide accurate measurement of the intended gas levels is vitally important
that the instrument receives regular calibration using precise reference gases traceable to National Standards. This is necessary to
correct for drift and ageing of the individual gas sensors and enables any sensors that require replacement to be identified.
In general it is recommended that the period between calibrations should not exceed six months - unless otherwise requested, this is
the “calibration due” period programmed into the instrument during manufacture.
Where instruments are exposed to levels of above 20% LEL flammable gas on a regular basis the period should be reduced to 3
months.
Calibration can either be carried out: -
a). by returning the instrument to ENMET or authorized ENMET service center.
b). customer calibration using appropriate equipment.
13.3 Configuration (Using Optional Software & Hardware)
Various parameters associated with the PGD2 instrument can be configured by the user to suit the particular operational requirements.
This configuration is carried out using the purpose designed PC software, PGD Utilities, (option) Windows.
Communication between the instrument and the PC is carried out using either the PGD2 Interface Unit Model PGDCI or ‘Smart’
Charger/Interface Unit Model PGDC2/I(options).
Configuration can be carried out on the following parameters: -
Toxic gas sensor data - including alarm levels.
Flammable gas sensor data - including alarm levels.
Oxygen sensor data - including alarm levels.
Instrument name and serial number - see Section 6.13.
Low battery warning level.
Calibration gas concentrations.
Display backlight time - see Section 6.16.
Confidence bleep flash rate - see Section 6.19.
Confidence bleep on/off - see Section 6.19.
Sensor zero facility enable/disable - see Section 6.17.
Calibration due inhibit - see Section 6.8.
Data Logging mode - see Section 6.21.
13.4 Programming (Using Optional Software & Hardware)
The PGD2 Portable Gas Detectors can be fully reprogrammed without even removing it from its protective rubber case.
The ability to fully reprogram the instrument offers the advantages that: -
a). users can conveniently update the software in their instrument to make use of the latest features.
b). instruments can be programmed with bespoke software to suit a particular application and then if required can be
converted back to standard software.
This configuration is carried out using the purpose designed PC software, Programming Utilities, (option) running under Windows.
The facility is password protected to provide unauthorized use. Details on the use of the programming facility are given in the
Calibration, Configuration & Programming Instruction Manual.