LP4300 FLOOR SCALE OPERATION INSTALLATION AND SERVICE MANUAL 366 CIRCLE OF PROGRESS POTTSTOWN, PA 19464 (610)323-2250 FAX: (610)323-0114
TABLE OF CONTENTS CONTENTS SECTION 1.0 DESCRIPTION. SECTION 2.0 PREPARATION FOR USE SECTION 2.1 RECEIVING INSPECTION SECTION 2.2 SHIPMENT SECTION 2.3 SITE SELECTION SECTION 2.4 INSTALLING SECTION 2.5 LEVELING SECTION 2.6 HOOK-UP CABLE SECTION 3.0 TROUBLE SHOOTING SECTION 4.0 SERVICING SECTION 4.1 CHECKING THE CONNECTIONS SECTION 4.2 SERVICING THE LOAD CELL SECTION 4.3 CHECKING THE LOAD CELL SECTION 4.4 REPLACING THE LOAD CELL SECTION 5.
SECTION 1.0 DESCRIPTION The Eagle Microsystems Model LP4300 is a low profile industrial floor scale available in four sizes; 30" x 30", 36" x 36", 42" x 42" and 48" x 48". The LP4300 was designed for easy installation and maintenance. All maintenance and calibration work is performed from the top surface and does not require the removal of any decking or lifting the scale to adjust the leveling. The load cell summing board is located in a drawer on the side of the scale. SECTION 2.
2.3 SITE SELECTION 1. Line power devices causing large inductive currents should not run off the same circuit as the scale. Fluctuations in line voltage caused by such devices may result in display instability. 2. The hook-up cable to the read-out should not run close to other unshielded cables. Display instability may result. 3. For best accuracy, a flat, level, and rigid surface is recommended to support the scale and ton containers. 4. The area should be accessible for periodic cleaning. 2.
SECTION 3.0 TROUBLE SHOOTING The following is a list of potential problems and likely cures. 1. Inaccurate but repeatable weight readings: a. Adjust span on read-out (see instrument manual) 2. Blank or drifting display: a. Consult the instrument manual. b. Look for loose connection in hook-up cable at the instrument or in the Summing Box. See Section 4.0 d. Look for moisture in the Summing Box c. Test for bad load cell (see section 4.2) SECTION 4.0 SERVICING 4.
4.2 Checking the load cells. 1. Load Cell resistance test: a. Disconnect the load cells from the Summing Box and measure the resistance as shown in Figure 3. b. Any electrical leakage between the leads and the load cell case is usually caused by moisture leakage into the load cell or by moisture in a damaged load cell cable. c.If a load cell does not pass the above resistance tests, replace it with a known good one.
FIGURE 4 LOAD CELL WIRING RED +EXT BLK -EXT GRN +SIG WHT -SIG YEL SHLD LOAD CELL LOAD CELL VOLTAGE CHECK (WITH 15V EXCITATION) BLACK TO WHITE: BLACK TO GREEN: BLACK TO RED: +7.5V (EXCITATION / 2) +7.
SECTION 5.0 SPECIFICATIONS PHYSICAL SIZE: Model LP4300 30" x 30", 36" x 36", 42" x 42", and 48" x 48". WEIGHT: 33" x30" = 96 lbs, 36" x 36" = 115 lbs 42" x 42" = 135 lbs, 48" x 48" = 162 lbs CONSTRUCTION: Welded steel and formed plate. FINISH: Primer and acrylic paint CAPACITY: 1000, 2000 and 5000 LB cap. SAFE OVERLOAD: 200% of Rated Capacity. ULTIMATE OVERLOAD: 400% of Rated Capacity. NOMINAL OUTPUT: 1.5 mV/V at full scale OPERATING ACCURACY: 0.1% of Capacity. REPEATABILITY: 0.
