Super Systems PGA3000 - Manual (Page 4)

SSi Manual 4549 Page 4 of 16 3-Gas Analyzer PGA3000
Revision Level E
Basic Operating Theory
The Model PGA 3000 has been designed for the simultaneous analysis of CO,
CO2 and CH4 in heat-treat furnace atmosphere gases. It has a 16 line by 40-
character LCD display and a 4 x 4 keypad for the operator interface. Information
is presented to the operator on various screens. The operator selects the
appropriate page and enters the number using the keypad.
Numeric keypad key assignments.
0 – 9 are used to enter numeric data.
* is the escape key and clears all numbers previously entered.
# will display a specific menu, to select a specific page, press a numeric key (or
two numeric keys) and then the # key.
A is used as the ENTER key.
B moves the cursor up.
C moves the cursor down.
D adds a decimal point to the data being entered on a screen, also toggles from
one furnace to the next on the data collection page.
Analyzer Start-Up Procedure
Turn the power switch on and allow the instrument to warm up until numbers
appear on the default screen instead of ********. This process should take
approximately two minutes.
Accurate readings are only possible if the sample is taken from a clean (free of
excess carbon buildup) sample port. The current state-of-the-art technology
associated with IR sampling requires that a clean, soot free sample be available
for analysis. A clean sample port will also increase the life of the filter elements,
and reduce the possibility that soot will enter the unit and contaminate the
sensors.
On a furnace, the ideal port would be found on SSi’s Sample Port (Part Number
20263). If this is not available, the burnout port of a freshly burned-out Gold
Probe
™ would be an alternative, although this would still contain a trace amount
of soot.
On a generator, a dedicated sample port should be available. This sample port
should be blown out before it is used, which will remove any soot that has
accumulated in the line. This is accomplished by opening the valve without
connecting the analyzer. Wait until the gas stream is clean before proceeding
and connect the sample line to the sample port.