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AIM/PURPOSE: To describe the instruction for the calibration of Dumpy Level to ensure that equipment is maintained in fully serviceable condition, is safe to operate and meets environmental requirements. FOR THE CALIBRATION OF DUMPY LEVEL The method described below is to be used on-site check prior to use as to the accuracy of the Dumpy level between calibration checks. This Work instruction shall be conducted at the commencement and completion of a contract. 1. Drive two pegs, "A" & "B", into the ground six metres or more apart 2. Set Dumpy up at "C" 3. Shoot a level at "A" and "B" 4. Relocate Dumpy to "D" and shoot a level at "A" and "B" 5. Record the appropriate result in the workbook. (Levels shot at "D" should be within ± 10mm of "C") D A C B
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How is motor operated valve calibrated?
Usually with electronically controlled valves or any other device that has movement limits, there will be either a slotted ribbon, or 2 sensors and a stepper motor where the device can auto calibrate by moving until both sensors are hit, then it can calibrate it's self and move to a predetermined home position. The same is with a ribbon, (a good example of that design is a printer where you will see it spin the feed wheels and move the heads from side to side on startup to calibrate it's self) Usually electronically controlled valves do not need any user adjustment for calibration. (at least with heating and cooling systems)
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Put the spirit level on a flat surface, check that the bubble is in the middle of the little glass vial. If it is, the machine is level.
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Why hotwell level is maintained in condenser?
High hotwell level will get the cooling water tubes of condenser submerged in the condensate hence cooling efect will be reduced consequentaly vacuum will drop. Low hotwell level will lead to low suction pressure of Condensate Extraction Pump hence it may lead to cavitation.
What does 57dB sound like?
I think that would be about the sound level while watching a TV. I think housing codes are set to maintain a 45 dbA level sound-proofing for the interior of homes.
