Routine Maintenance; Filter - Teledyne 7120 Operating Instructions Manual

Photometric ir analyzer

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5 Maintenance

3. Insert a small flat-blade screwdriver into the slot in the receptacle

wall nearest the fuse and gently pry open the fuse receptacle. The

fuse holder will slide out. There are two fuses in use and are

visible in the clip.

4. Remove the bad fuse and replace it with a two 3 AGmm 1.0 A,

250 VAC, IEC time lag (T) fuse (P /N F9).

5. Replace the fuse holder into its receptacle, pushing in firmly until

it clicks.

5.1

Routine Maintenance

The 7100 should be inspected on a regular schedule to be determined

by the maintenance personnel. The system filter and analyzer

measurement cell should be maintained as required by the quality

of the sample.

Periodic calibration of the system will assure accurate analysis of the

sample gas and will also indicate the need for maintenance. A regular

calibration schedule should include recording of the zero and span pot values

for performance trends. Clogging of the sample system and other system

problems will usually show early symptoms during online analysis or during

calibration.

Problems with the system not due to the normal processing of the

sample are sometimes failures which must be corrected.

The system filter element (if included) should also be periodically

inspected. Replacement is recommended when the element begins to restrict

sample flow or upon visual inspection looks clogged and dirty.

NOTE: Although not normally included on basic Model 7120

analyzers, input protection filtering is always recom-

mended. Refer to the system piping schematic for recom-

mended hook-up.

5-2

Teledyne Analytical Instruments

Model 7120

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