Teledyne 100AH instruction manual 10-4, Pres, Samp FL

Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D

Table 10-1: Test Functions (Continued)

Test Function	Factory Set-Up	Comment
VACUUM	Check value in	Reaction cell pressure is measured to monitor sample pressure
	Final Test	and to compensate any sample pressure variation.
	Values	Faults are caused due to:
	Table 2-1
		1. Pump not able to pull the vacuum
		2. Faulty pressure sensor
		3. Sample line flow restriction
		4. Faulty orifice assembly
		See Section 10.3.5 Pres/Flow Sensor.
PRES	Check value in	Inlet sample pressure is typically 1 In-Hg lower than the
	Final Test	ambient pressure due to the internal pressure drop.
	Values	Faults are caused due to:
	Table 2-1
		1. Inlet pressure too high
		2. Faulty pressure sensor
		3. Sample line flow restriction
		See Section 10.3.5 Pres/Flow Sensor.
SAMP FL	650 cc/min ±65	This is the instrument flow. It is computed value from the
		upstream and downstream of the orifice. Incorrect flow can be
		caused by the plugged orifice, pneumatic leak, or the flow
		meter itself. If the orifice is plugged, computed value could
		give a false flow indication.
		- A rapid method of determining if the orifice is plugged is to
		disconnect the sample inlet from the filter assembly cell, then
		briefly put your finger over the fittings on the filter. You
		should feel the vacuum build up.
		- Another reliable method is to attach a rotameter or soap
		bubble flowmeter to the sample filter inlet fitting to measure
		the flows.
		Flow rate will change ± a few cc/min due to changes in
		sample pressure. Changing altitude changes the ambient air
		pressure and therefore the sample flowrate. See
		Section 10.2.2 Flow Check.

(table continued)

10-4