Troubleshooting Tasks; To Measure A Column Flow; Measuring Fid, Tcd, Uecd, And Fpd Column Flow - Agilent Technologies 7890 Series Troubleshooting Manual

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Troubleshooting Tasks

To Measure a Column Flow

Measuring FID, TCD, uECD, and FPD column flow

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The following procedure can be used to measure column flow
with an FID, TCD, uECD, and FPD.
Hydrogen (H2) is flammable and is an explosion hazard when
mixed with air in an enclosed space (for example, a flow meter).
Purge flowmeters with inert gas as needed. Always measure
gases individually. Always turn off detectors to prevent
flame/bead autoignition.
Be careful! The detector may be hot enough to cause burns. If the
detector is hot, wear heat-resistant gloves to protect your hands.
1
Gather the following:
• Appropriate flowmeter adapter tube (can be found in the
GC ship kit)
• Electronic flowmeter calibrated for the gas and flow rates
of concern
2
Turn off the detector.
3
Turn off the detector flows.
4
Connect the appropriate adapter to the detector exhaust.
Flowmeter tube diameters vary by model; modify the adapter to the
flowmeter tubing as needed.
A 1/8-in rubber adapter tube attaches directly to a uECD or
TCD exhaust vent.
A separate adapter (19301-60660) is supplied for the FID.
Insert the adapter into the detector exhaust vent as far as
possible. You will feel resistance as the adapter O-ring is
forced into the detector exhaust vent. Twist and push the
adapter during insertion to ensure a good seal.
Agilent 7890 Series Troubleshooting