Rice Lake BCi Belt Scale - Installation & Operation Manual Version 2.00 - Manual (Page 19)

BCi Installation & Operation Manual - Introduction and Overview 13
1.6 Handbook 44 Requirements for Belt Scales
The following is a listing of various Handbook 44 requirements for belt scales.
• Minimum divisions shall not be greater than 0.1 of the minimum totalized load.
• On test, the recorder must show the initial totalizer reading; the final totalizer reading, the unit of
measure and the quantity delivered along with the time and date.
• The integrator master totalizer shall not be reset the master totalizer without breaking a security seal.
• In the event of loss of power of up to 24 hours, the accumulated measured quantity on the master
totalizer shall be retained in memory during that power loss.
• An audio or visual alarm indication shall be activated when the flow rate equals or falls below 35% or is
in excess of 98% of the rated capacity.
• The totalizer can only advance when the belt conveyor is running (ie: if the belt is shut down with coal
on the belt, the totalizer could not register).
• The master totalizer shall not be re-settable without breaking a security seal.
• Means shall be provided that the totalizer reading shall be retained for a minimum of 24 hours in the
event of a power failure.
• The belt scale integrator must factor in belt speed as a function of calculating tons per hour weight.
• Zero is to be limited to +/- 2% without breaking the security seal.
• Auto zero mechanism shall be designed to operate only after a whole number of belt revolutions.
• An indication shall be provided for when the auto zero adjustment has reached its maximum limit.
• Belt speed device shall be designed so that there is no slip.
• An event logger must provide an audit trail of all calibration adjustment with a printed copy available on
demand. It shall have the capacity to retain records equal to ten times the number of sealable parameters
in the device, but not more than 1000 records are required, (ie: time and date of change; the parameter
value; the parameter ID).
• A zero circuit should provide for an average of one belt revolution (track +/-).
• Remote outputs record for (digital and analog), the total tons, rate in% of full cap, and the belt speed.
• Front panel calibration that is password protected w/ audit trail.
• Ability to enter the belt length and indicate in feet.
• Ability to accept pulse input for belt speed indication.