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Model GFC7000E Instruction Manual Frequently Asked Questions
04584 Rev A1 34
Q: How long does the IR source last?
A: Typical lifetime is about 2-3 years.
Q: Where is the sintered filter/sample flow control orifice?
A: These components are located inside the flow control assembly that is attached to the inlet side
of the sample pump, see Figure 3-13. See Section 11.5.1 for instructions on disassembly and
replacement.
Q: How do I set up a SEQUENCE to run a nightly calibration check?
A: The setup of this option is located in Section 7.6.
Q: How do I set the analog output signal range and offset?
A: Instructions for this can be found in Section 6.9.4 which describes analog I/O configuration.
Q: What is the averaging time for an GFC7000E?
A: The default averaging time, optimized for ambient pollution monitoring, is 150 seconds for
stable concentrations and 10 seconds for rapidly changing concentrations; see Section 10.5.1 for
more information. However, it is adjustable over a range of 0.5 second to 200 seconds (please
contact customer service for more information).
4.2. Glossary
ASSY - acronym for Assembly
DAS - acronym for data acquisition system, the old acronym of iDAS.
DIAG - acronym for diagnostics, the diagnostic settings of the analyzer
DHCP: acronym for dynamic host configuration protocol. A protocol used by LAN or Internet
servers to automatically set up the interface protocols between themselves and any other
addressable device connected to the network.
DOC - Disk On Chip, the analyzer’s central storage area for analyzer firmware, configuration
settings and data. This is a solid state device without mechanically moving parts that acts as a
computer hard disk drive under Æ DOS with disk label “C”. DOC chips come with 8 mb in the E-
series analyzer standard configuration but are available in larger sizes.
DOS - Disk Operating System. The E-series analyzers uses DR DOS
EEPROM - also referred to as a FLASH chip.
FLASH - flash memory is non-volatile, solid-state memory.
GFC – Acronym for Gas Filter Correlation.
I
2
C bus - a clocked, bi-directional, serial bus for communication between individual analyzer
components