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| Line 1: |
Line 1: |
| =Set up=
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| :*Make sure discharge pipe (on righthand side) is placed in something to collect discharge, and valve is not completely shut.
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| :*Check clear tube is connected to compressor OUTLET, and securely attached.
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| :*Turn on compressor.
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| :*Gauge on back of photometer should read 12psi.
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| :*Check gas pipe is attached at tap.
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| :*Turn on gas.
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| :*Wait 1 minute.
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| :*Turn on photometer. It should click, and orange "flame on" light should come on.
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| :*Place beaker of distilled water in the photometer tray, and make sure thin tube reaches water.
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| :*Wait 15 minutes before taking any readings.
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| :*Use "blank" dial to adjust reading to 0 for distilled water.
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| =Taking readings=
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| :*Place thin tube into sample, far in, as the liquid will be taken up quite rapidly.
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| :*Wait for reading to stabilise (reading may continue to fluctuate at high values) and take reading.
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| :*Place tube in distilled water beaker between each sample, waiting until reading returns to 0.
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| =In case of compressor blow-out=
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| :*Turn off gas at tap.
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| :*Turn off photometer.
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| :*Turn off compressor.
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| :*Redo set up steps, with 15 minute waiting time reduced to 5, as the equipment will already be almost up to temperature.
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