WEIGHING THE COAL.
The weight of coal used throughout an examination might conveniently be found by utilizing a normal wheelbarrow and a platform range, organized as in number
1. At each side of the scales build a slope with its leading level with the top of the platform. But make sure not to have either one touch the system. Set the empty wheelbarrow on the scales, run the movable weight or grace out till it specifically balances the weight of the barrow as well as lock it in position with the thumbscrew.
Next off, put weights on the scale frying pan A to correspond to an internet weight of 250 or 300 pounds of coal Load the barrow with coal. Run it on the ranges, and include coal or take off coal till the scales equilibrium. This is easily done by having a tiny stack of coal B beside the ranges. If the weights on the range pan represent, claim, 300 pounds, the internet weight of coal in the barrow is specifically 300 pounds. This coal is rolled before the boiler and also the clean floor, and also the barrow is returned for an additional load.
Set to balance tare of the wheelbarrow; 2 Include in balance net weight of coal.
Each time the barrow of coal is weighed on the scales and also taken to the central heating boiler being checked, a tally mark needs to be made on a board toenailed to the wall surface beside the ranges. Each tally mark represents 300 pounds of coal because the quantity of coal in the barrow is adjusted at each considering, to make sure that the ranges simply equilibrium.
At the end of the examination, for that reason.
The variety of tally marks is multiplied by 300, and the product is the weight of coal used, provided it has all been discharged; however if any coal stays before the central heating boiler at the close of the test, it needs to be gathered up as well as weighed, and its weight must be subtracted from the total weight indicated by the tally marks to obtain the variety of pounds of coal in fact discharged. You should, certainly, start the examination with no coal in front of the boiler.
Care needs to be taken not to neglect to make a tally mark each time a barrow of coal is run the scales.
By setting the scales so as to reveal any type of internet weight, such as 250 or 300 extra pounds, as well as making each bar  row tons specifically this weight, much time is saved, as it is unnecessary to change any of the weights or the placement of the cyclist on the range light beam.
If the coal used in the examination is to be evaluated, take an example of from 4 to 6 extra pounds from each barrow and also toss it right into a box near the scales. Do this prior to the coal is considered. These small amounts from the different barrow tons will certainly that offer a fairly typical sample of the coal used throughout the examination.
The condition of the heating system must coincide at the end of the test period as at the beginning. Therefore, right now the test is started, observe the density of the gas bed and also the condition of the fire. If the fire was cleansed, claim, an hr prior to the examination began, see that it is cleaned up an hour prior to the moment when the test is arranged to finish. If the coal was discharged, say, eight mins before the examination began, the last coal utilized throughout the examination ought to be discharged 8 mins prior to the end of the test. The item of these preventative measures is to guarantee the exact same problems at start and surface, as almost as feasible; otherwise, the coal weighed will certainly not coincide as the coal eaten.