Flomec QSI 제품 소유자 매뉴얼 - 페이지 12

{카테고리_이름} Flomec QSI에 대한 제품 소유자 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Flomec QSI 16 페이지. Cover plate transmitter for g2 meters

TEMPERATURE PROBES

INSTALLATION & WIRING - (continued)

After performing the differential check, remove the PT100 #2 probe near the inlet

end of the meter and install the removed probe in the system supply line.

During normal system operation, probe PT100 #1 is installed near the meter outlet

end and probe PT100 #2 is installed in the system supply line. Accurate system

BTU usage is calculated between the (2) probes.

Typically, the probe cables are the same length. Excess cable from the PT100 #1

probe (near the meter outlet) to the cover plate may be coiled and secured using

plastic quick ties.

MAINTENANCE

Check cable-entry seals periodically. Tighten and/or apply sealant if needed. This

is especially important in environments containing heavy concentrations of dust,

oil mist, or other residue.

Check all wiring connections occasionally for oxidation or corrosion. Clean and re-

seat if such conditions are noted.

If necessary, check and re-seat any connections that may have been subjected to

strain (during rework or construction, for example).

NOTE: The QSI2 and QSI3 communications module has a 3V lithium coin cell

battery installed on the PC board. In case of power failure, the battery functions

as power backup to maintain the internal system time. Any QSI2 or QSI3 feature

that uses a time reference as part of its functionality will be immediately accurate

to the current time when power is restored.

DISCONNECT POWER TO METER

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Remove (6) screws retaining the cover plate to the base and lift the cover plate

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free of the meter body (see Figure 9).

Flip the cover plate over and remove (4) screws retaining the PC board

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assembly (see Figure 10).

Remove and replace the coin cell battery (CR2032) on the backside of PC

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board (see Figure 11).

Reverse the procedure to reassemble the cover plate to the base. Make sure

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the cover plate seal is seated before tightening the (6) cover plate screws.