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APPENDIX 7
VERIFICATION OF SPREADER CONSTANT
To verify and refine the Spreader Constant, perform the following procedure (after completing INITIAL
CONSOLE PROGRAMMING):
1) Weigh loaded truck and note weight.
2) Enter the Product Density in lbs/cu.ft. [grams/liter] into key labelled .
3) Enter a "0" into the key labelled .
4) With the rate switch in the MAN position, unload a portion of the load by positioning the boom switch
to ON.
5) Determine the actual weight unloaded by re-weighing the truck.
6) Compare to the TOTAL VOLUME displayed by the Console.
7) Perform the following calculation to correct the Spreader Constant if desired:
Corrected Spreader Constant =
old Spreader Constant x TOTAL VOLUME
actual weight unloaded
EXAMPLE: old Spreader Constant = 228 [797]
TOTAL VOLUME amount = 2000 lbs [4400 kg]
actual weight unloaded = 1950 lbs [4290 kg]
English (US):
Corrected Spreader Constant (1 lb) = 228 x 2000 = 234
1950
Metric (SI):
Corrected Spreader Constant (1 kg) = [797] x [4400] = [817]
[4290]
This is the new Spreader Constant. Repeat this procedure until the weight of the metered material
equals the TOTAL VOLUME value.
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