Apogee TS-100 Посібник користувача - Сторінка 15

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MAINTENANCE AND RECALIBRATION

At full duty, the fan is designed to last 50,000 hours (5.7 years). Ultimately, this depends on operating

conditions, and actual results may vary. If the fan runs less than approximately 4500 RPM at full power,

then there may be a blockage or the fan may need to be replaced. The fan is secured by four nylon

screws and can be easily removed. When a replacement fan is installed, verify that it is oriented the

correct way, with air being pulled upwards through the shield towards the hat. Ensure that the

replacement fan is wired correctly as outlined in the OPERATION AND MEASUREMENT section.

Inspect the shield regularly and clean as needed to maintain optimum performance. If the shield or hat is

dirty, wipe the surface with a moist rag to remove buildup and return the surface to its original condition.

Check all mounting nuts and tighten if they are loose.

For optimal accuracy, check the yellow-bead thermistor every three months for dust/dirt buildup. If

needed, twist and pull out the sensor port adapter, then wipe the thermistor tip clean. Be sure to return

the thermistor to its proper position as outlined in the DEPLOYMENT AND INSTALLATION section.

Apogee ST-110 and ST-300 temperature sensors are factory calibrated and come with sensor-specific

calibration coefficients. Sensors are calibrated for absolute temperature against the mean of two

reference PRTs in a constant temperature bath, over a range of approximately -35 to 60 C. The reference

PRT calibrations are directly traceable to the NIST.