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CAUTION
BE CAREFUL USING THE BUBBLE
SOLUTION. IF THERE IS NO INTERNAL
PRESSURE, THE SOLUTION MAY ENTER
AND CONTAMINATE THE CELL.
DO NOT ATTEMPT TO USE THE BUBBLE SOLUTION
WHILE THE UNIT IS UNDER VACUUM. THIS MAY
CAUSE DAMAGE TO THE ANALYZER.
USE ONLY BUBBLES, NOT LIQUID.
11.3.2 leak self test
If only a Model 300 is available, the following alternate method for leak checking can be
used:
The power must be on and the pump must be in-line. Disconnect the power from the
pump. Check for the sample flow. If the sample flow does not read zero, record the
reading. Re-connect the power to the pump.
Cap the sample inlet. Check if the sample flow goes down to zero. If not, check the
sample flow exceeds the prerecorded value when the pump was disconnected. If the
sample flow is above zero or higher than the prerecorded value, the unit has the leak.
11.4 Changing the prom
1. Locate the CPU card by referring to Figure 1.6.
2. Remove the screws that hold the CPU card (SBC40 printed on the lever) top
corner to the A/D - I/O card, then remove the card from the STD-BUS backplane.
3. Remove the two cables attached to the SBC40, taking note of the polarity.
4. Remove the card, laying it down on an insulating surface such that the card edge
pins on the PCB are on the left. The PROM chip should be at the top center. The
current chip should be labeled with something like "API CO A.6 - - -". Gently
pry the chip from its socket and replace it with the new chip. Install the chip in
the left end of the socket with the notch facing to the right. Make sure that all of
the legs insert into the socket correctly.
5. Replace the CPU board and re-attach the connectors, making sure to observe the
polarity.
6 Re-attach the CPU card to the STD-BUS.
7. Move the power switch to the "ON" position and observe the front panel display.
As the analyzer goes through the setup the version number will be displayed on
P/N 02163G1 Teledyne API Model 300 CO Analyzer Instruction Manual - Page 103