Campbell 012 Operator's Manual

Campbell 012 Operator's Manual Manual pdf 31 page image

4-1SECTION 4. MAINTENANCE4.1 MOISTURE IN CANISTERThe hex bolts used to seal the top and bottomof the canister should be tightened every springand fall to maintain seal integrity. As aguideline, the bolts should be tightened to about160 inch pounds.The readings from a moisture detection sensorhoused in the canister are displayed in Location3 and accessed by keying *63A (Section 2.7).The sensor detects humidity above 33% with 0dry and readings in the 100s being wet. Thereadings should be monitored regularly and ifthey are above 200, the weather station mustbe dried out.WARNING: Damage to the CR10, modem,and wiring panel will occur if high moisturelevels are not corrected. The weatherstation should be dried out and thedesiccant reactivated when the moisturereading is 200 or greater.When opening the canister, loosen each hexbolt one half turn until each bolt has beenloosened two full turns.CAUTION: DO NOT REMOVE THEBOLTS FROM THE CANISTER.Desiccant can be reactivated by placing itin an oven at 250 oF for 16 hours.4.2 RAIN GAGEInspect and clean the rain gage as needed toremove leaves, debris, etc. The rain gagecalibration is 0.01 in. per tip. The followingcheck is advised every 6 to 12 months.Rain Gage Calibration:1. Secure a metal can that will hold at leastone quart of water.2. Punch a very, very small hole in the bottomof the can.3. Place the can in the top funnel of the raingage and pour 16 fluid ounces (1 pint) ofwater into the can (A 16oz. soft drink bottlefilled to within 2.5 inches of the top may beused for a rough field calibration).4. If it takes less than 45 minutes for thiswater to run out, the hole in the can is toolarge.5. One hundred tips plus or minus three tipsshould occur.6. Adjusting screws are located on the bottomadjacent to the large center drain hole.Adjust both screws the same number ofturns. Rotation clockwise increases thenumber of tips per 16 oz. of water; counterclockwise rotation decreases the number oftips per 16 oz. of water. One half turn ofboth screws causes a 2% to 3% change.7. Check and re-level the rain gage lid.4.3 SOLAR RADIATIONInspect and clean the pyranometer every two tothree months. Dusty environments may requiremore frequent cleaning. Be careful not toscratch the surface of the sensor. A blast ofclean, dry air or a soft bristle, camel hair brushare best used for cleaning the diffuser surface.Recalibration of the radiation sensor isrecommended every two (2) years.4.4 WIND SPEED AND DIRECTIONInspect the operation of the anemometer andwindvane bearings at least once a year. Theyshould move freely and react to a windspeed of2-3 mph. Check the windvane by manuallypositioning it and verifying the reading.Components requiring replacement due tonormal wear are the precision ball bearings andthe azimuth potentiometer. The bearings havea life expectancy of twenty million revolutions (3to 5 years in normal use). This time may bereduced to 1 year or less in high wind areas.The anemometer bearings should be replaced ifthey become noisy or if the starting thresholdincreases above an acceptable level.CAUTION: DO NOT use WD-40 or otherlubricants on the bearings.

/ 34

Related manuals for Campbell 012