Operations And Procedures Manual for Trans-Data On Board Weight Systems

FIELD OPERATION OF THE ON-BOARD SCALE

  1. FIELD OPERATION AND MAINTENANCE
    1. WARM UP
      Like any electronic instrument, the digital meter should have a warm-up period to permit the circuits to stabilize. A minimum of 10 minutes should be allowed before any readings or scale zeroing is attempted. NOTE: THE SCALE SHOULD BE OPERATED FOR 10 MINUTES BEFORE ZEROING OR READING THE METER.
    2. ZEROING THE SCALE
      After an adequate warm up period, the indicator display can be zeroed by pressing, on the blue keys, [-0-] (see 3.4.3). Before this is done, the truck should be empty of all cargo load and be on level ground with all brakes off. Each channel should be zeroed separately. Enter Channels [1], [2] or [3], then press [SELECT]. Then, on the blue keys, press, [-0-]. After each channel has been zeroed, the display will read "00" or the tare weight of that channel. You can then enter [4] [SELECT], then, on the blue keys, press, [-0-] (total of all channels).
    3. ACHIEVING AN ACCURATE READING
      A properly set up TRANS-DATA On-Board Scale System is capable of reading accurately within 1% of the actual load to the nearest graduation set in the base program, Parameter [3]. To achieve accuracy, several conditions must be met. As in large platform scales, accuracy depends upon keeping the platform level, therefore, all weight readings should be taken with the truck as level as possible. To keep the suspension from causing false load readings due to spring wrap-up, all brakes including parking (Maxi), should be released. To assure the overall performance of the on-board system, the weight, by axle group, should be checked at least twice a month for each truck in the fleet.
    4. REPORTING THE SCALES INACCURACIES
      When operating the truck across the landfill or transfer station scale and the cab mounted meter displayed gross weight does not coincide within 1% of the certified scale weight reading, fill out form 3.7.5, Truck Weight Record, for at least four consecutive trips over the same scale. Turn these readings in to your supervisor. The meter can be trimmed by trained personnel without taking it back across the scale. All axle and total truck readings on the cab mounted meter along with the certified scale readings for the total truck and at least the rear axle group must be taken. If the truck scale is being operated properly, the percentage of inaccuracy will remain constant. Even if the scale is "off", it will consistently repeat.
    5. VEHICLE SCALE PROBLEM SHEET
      If the meter is not operating properly or displaying "EEEEEEE" or "UUUUUUU" press [1], then, on the blue keys, press [SELECT], press [2], then, on the blue keys, press [SELECT], or press [3], then, on the blue keys, press [SELECT], and determine which channels are not operating properly. Fill out Form 3.6.6, Vehicle Scale Problem Operation Sheet, and turn it in to your supervisor.
    6. LOW BATTERY CONDITION
      If the meter operates properly when the battery power is first turned "on" and then goes "off" when the engine is started and will not come back on, let the engine warm up thoroughly, stop the engine and shut the battery switch "off" and wait a moment. Then turn the battery switch back "on" and let the meter stabilize. Then, restart the engine. A cold engine can take up to 800 initial cranking amps surge to roll the starter. This load surge can cause the microprocessor to shut down. If it still will not operate, fill out form 3.6.6, Vehicle Scale Problem Operation Sheet, and turn it in to your supervisor.
    7. FUSE REPLACEMENT
      If the fuse blows, the fuse should not be replaced or the system should not be put back into service without determining the cause. Only replace with a 1-amp fuse for the in-cab fuse holder and a 5-amp fuse for the battery case fuse holder.
    8. USING THE WEIGHT SET POINT
      The M-2000 digital indicator is equipped with set point warning lights or set points that can be set; they will flash when the target load has been reached. However, if the truck is on an incline or the suspension is uneven due to broken pavement or other rough road conditions, the light may flash before the actual target weight is reached. As in reading the weight display, the target overweight flashing light should only be observed if the truck is on level ground with all brakes off.
    9. FINE TUNING THE SYSTEM
      The digital indicator has a unique feature that allows the original weight span to be reset or modified without having to re-weigh the vehicle. Use the feature as shown in Section III, 7, T. Parameter [200], Trimming the Scale Weights After Set-Up. To correct minor differences that are noted in the averages taken from Form 3.7.5 Truck Weight Record, enter the channel to be corrected in the calibration mode, then enter [200] [SELECT] and press [1] to raise graduation size or [9] to lower graduation size, then press [T.gif] to accomplish the amount of change required to achieve the scale difference to that number. Example: If the average reading on Form 3.7.5 Truck Weight Record, shows the rear axles to be reading under weight by (.80) tons (1600 lbs.), divide (.08) by two = (.04) =(800 lbs.). Look up the previous recorded 110# for each axle on Form 3.5.1, Truck Scale Settings. To change the weight settings on the M-2000 meter, see Section III, 7, T. Trimming the Scale Weights After Set-up. After fine-tuning the scale, re-check the 110# and record it on Form 3.5.1.
    10. NORMAL SCALE MAINTENANCE
      At least once a month, the scale system should be checked by qualified, trained, maintenance personnel. These inspections should be done with the truck empty, on level ground, and all brakes off. The indicator keypad shield should be removed and the following procedures should be done:
      1. Check all channels for proper operation.
      2. Check each channel with a digital volt meter for base zero (see Section III, 7, L. Zeroing the Sensor Beam).
      3. Re-zero the channel using Parameter 12, if required.
      4. Reset Parameter [110} for each channel, if required, based on Form 3.7.5 Truck Weight Record averages (at least 4 complete readouts). See Section III, 7., O. Parameter 13, Load Span Settings, and Section III, 7, T. Trimming the Scale Weights After Set-up.
    11. SCALE PARTIAL OR COMPLETE FAILURE
      1. Check in-line power fuse (replace only with 1 amp fuse). If fuse blows again, check for loose ground or a short in the power supply line. 
      2. If the indicator displays either Trouble Code 20 or 22, replace the indicator and return the old one for service.
      3. Check to see if each operational channel is responding when it is selected. If a channel does not respond, remove the bad load beam wires from the 7-Position Terminal Strip on the rear of the meter (see 3.4.2). With a digital multi meter set at 2K ohms, check across the green and white wires. The meter should read .350/.351 a similar check across the red and black wires should also read .350/.351. If either of these readings are not seen, check for a break in the load beam signal wiring or replace the load beam.
      4. If the ohm readings check out on the beam wiring, replace them to the proper channel terminal plug as shown in 3.4.2.
    12. USING THE INDIVIDUAL BIN WEIGHT SYSTEM
      The individual bin weight system is controlled by separate load beams mounted on the two fork arms and can be displayed either Channel 1 or Channel 3. In this configuration, when operating in Channel 3, it will operate separately from the other channels by setting the graduations differently from the other two channels. When attempting to weigh an individual bin, the indicator must be set to read on Channel 3. Run the fork arms forward to the weigh position with the cross bar in the center of the laser beam and the fork arms forward to allow the bin to be picked up. Before lowering the arms to the pick-up position, zero the meter out by pressing, on the blue keys [-0-] (see 3.4.3). Pick up the bin and raise the bin until the cross bar is up to the laser mark on the crossbar and pause until the weight on the indicator stabilizes (approx. 2 seconds). After the bin weight has been noted, the bin may be dumped in the usual manner. If a second bin is to be weighed, the same zeroing procedure should be followed. The on-board printer, as discussed in paragraph (M), can be connected to the digital indicator to allow a printed receipt to be issued for the individual bin weights.
    13. OPERATING THE ON-BOARD PRINTER
      The 12 volt on-board printer is designed to operate in conjunction with the TRANS-DATA digital indicator. It will print the displayed weight as a receipt including the company name and address if desired along with the time and date. The printer should be mounted in a convenient location. When the printer is installed, in conjunction with the standard indicator, the overweight warning light will be incorporated. If the individual bin exceeds the max overweight setting on the meter, the printer will not operate. To operate the printer after the desired weight reading has been displayed, simply press [in], [SELECT], the meter will display "ID". The driver will then enter the individual customer ID number and press [SELECT] again. When the printer starts to operate, the loaded bin may be dumped. The bin must then be returned to the weigh position using the laser light on the cross bar. After the empty bin weight stabilized, the driver will press [out] [SELECT]. When the printer starts, the empty bin may be unloaded from the forks and the driver may proceed to the next pick-up. If a second copy is required, the printer may be loaded with a 2-ply carbonless paper roll. At the end of each days' run, any excess print paper should be removed from the printer to prevent the roll from recycling and jamming the printer. To print the individual bin weights on a front loader or rear loader, the indicator must be set on 1, 3 or 5 as directed in 3.7.2, 3.7.3, or 3.7.4 Static Ticket Meter Set-Ups.

NOTE: BEFORE MODIFYING THE 110#, MAKE SURE THE TRUCK IS EMPTY, ON LEVEL GROUND, AND ALL BRAKES ARE OFF, INCLUDING THE MAXI. THEN CHECK EACH CHANNEL FOR ZERO WEIGHT READING WITHOUT TARE.