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Related Manuals for Rice Lake PW 400
Summary of Contents for Rice Lake PW 400
- Page 1 PW 400 / PW 500 Portable Wheel Load Weigher Installation and Service Manual 37881...
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Page 2: Table Of Contents
Replacement Parts ......................... 16 Wiring Diagram ........................18 PW 400 / PW 500 Limited Warranty ....................19 Copyright ©1997 Rice Lake Weighing Systems. All rights reserved. Printed in the United States of America. Specifications subject to change without notice. January 1997... -
Page 3: Introduction
The PW 400 and PW 500 are identical in operation. The main difference in the two models is the size of the platform. The PW 400 platform is 10" x 11" to handle most standard truck tires, while the larger PW 500 platform at 13.5"... -
Page 4: Physical Description
12 VDC Options and Accessories The following table shows the options and accessories available for the PW 400 and PW 500 Portable Wheel Load Weighers. Battery chargers listed in the table show the required power source and the number of wheel weighers that can be charged using the listed charger. -
Page 5: Operation
Operation Portable Weighing Procedures The PW 400/PW 500 Portable Wheel Load Weigher is specifically designed to indicate the weight of an individual wheel resting at any position within the weighing area. The operator must follow the basic prin- ciples of portable weighing in order to obtain accurate and reliable results. Improper weighing procedures can induce errors into the weighing process that are no fault of the weigher. -
Page 6: Wheel Placement
Occasionally the outside tire has such low air pressure that the inside tire of a dual set does not clear the ground. This will give an erroneous reading since the inner tire is bearing part of the load. The PW 400/PW 500 weigher design is such that either tire may be used. -
Page 7: Reading The Weigher Display
ZERO and LCL/TTL Activates or deactivates the display backlighting. Press both buttons at the same time to turn the display backlighting ON or OFF. COMM Communication connector for connecting two or more weighers together for Local/Total function or remote communications. CHGR Connection for input to recharge weigher battery. -
Page 8: Operating Instructions
REMOTE OUTPUT MESSAGE MEANING “TOT # # # # # LB” Total weight in pounds. “TOT # # # # # KG” Total weight in kilograms. “REM LOW BATTERY” Battery of interconnected weigher is becoming low. Recharge at first opportunity. “REM RECHARGE”... -
Page 9: Weigher Bus Address
Following is the procedure for connecting four weighers together for total operation: 1. Turn off the weighers to be interconnected. 2. Attach a communication cable from weigher #1 to weigher #2. 3. Attach a communication cable from the breakout receptacle of the first cable to the #3 weigher. 4. -
Page 10: Maintenance
Maintenance The PW 400/PW 500 weigher is designed to give many years of trouble-free service. However, in cases where a large number of portable weighers are in constant use and facilities are available, it may be desired to perform in-house maintenance rather than returning units to the factory. By carefully following instructions, normal maintenance and repairs can be easily accomplished. -
Page 11: Removing The Platform
Removing the Platform Snap rings (see #8 in Figure 2 below) are sealed at the factory with silicone sealer to ensure proper environ- mental protection of electronics. Before disassembly, remove seals with a pick or another sharp instrument. 1. Place weigher on a flat surface, bottom down. 2. -
Page 12: Removing The Pc Board
Removing the PC Board Use the following procedure to remove the PC board: 1. Remove the platform (see Section 3.2) and display cover (see Section 3.4). Wear a grounded wrist strap to prevent electrostatic discharge damage to PC board. 2. Unplug connectors J1, J2, J3, J5, J6 and J7. Take care to prevent damage to the connectors and wiring harness. -
Page 13: Removing The Battery
Removing the Battery Use the following procedure to remove the battery from the weigher. See Figure 4 for component locations. 1. Remove the 6 screws (70) around the outer edge of the battery compartment cover (69). 2. Lift out battery (66) and unplug connector. Figure 4 —... -
Page 14: Lubrication
4. Inspect side load strips (24) for tightness in base and signs of wear. Side strips should be replaced when depth of wear exceeds 0.003 inch. 5. Inspect link retaining pins (47) for tightness in base and signs of wear. 6. -
Page 15: Reassembling The Platform
11. Platform assembly is now complete. Calibration Verification Each PW 400/PW 500 weigher is fully calibrated and tested at the factory before shipment. The weigher is checked at five or more points to ensure accuracy of calibration over the weighing range of the scale. Special equipment is used to simulate vehicle passage and assure that calibrations are stabilized and will not change with normal usage. -
Page 16: Calibration Instructions
Section 5.0 below. Calibration Instructions After performing the test outlined in Section 4.0, Calibration Verification, calibration of the PW 400/PW 500 is needed if the weigher indication exceeds the tolerances described in Section 1.3. - Page 17 15. This completes the calibration of the weigher. Verify calibration as instructed in Section 4.0, Calibra- tion Verification. If weigher is still outside the tolerances specified in Section 1.3, turn the unit OFF and perform the steps required in Section 3.0, Maintenance. After completing Section 3.0, repeat steps 1 through 15 again.
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Page 18: Replacement Parts
Replacement Parts This section contains an exploded view of the PW 400/PW 500 weigher followed by an associated replace- ment parts list. Callout numbers on the exploded view correspond to item numbers on the parts list. Some callouts are shown elsewhere in this manual for user convenience. - Page 19 BEARING, Link (1-3/4") PISTON BUSHING, Link ASSEMBLY, Load Strip (2") RETAINER, Load Strip Resilient (2") LOAD STRIP, Upper (2") LOAD STRIP, Lower (2") NEEDLE BEARING, Load Strip ASSEMBLY, Base SUBASSEMBLY, Base BASE, Machined LOAD STRIP, Base Side (1") RING, Diaphragm Retainer GASKET, Base DIAPHRAGM ASSEMBLY, Dial Cover...
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Page 20: Wiring Diagram
BATTERY, 12 VDC Rechargeable GASKET, Battery cover COVER, Battery SCREW, Cover (#6-32 x 1/4 Flat Hd., 82° SS) SWITCH, RST-OFF/ON Communications Connector Assy. SWITCH, Momentary Pushbutton, Zero and LCL/TTL Cable Clamp TAG, RST-ON/OFF, Zero, LCL/TTL CHARGER CONNECTOR ASSY. TAG, Comm. Chgr. GASKET, CONNECTOR CONNECTOR ASSY, Battery wires DISPLAY ASSY. -
Page 21: Pw 400 / Pw 500 Limited Warranty
PW 400 / PW 500 Limited Warranty Rice Lake Weighing Systems (RLWS) warrants that all RLWS equipment and systems properly installed by a Distributor or Original Equipment Manufacturer (OEM) will operate per written specifications as confirmed by the Distributor/OEM and accepted by RLWS. All systems and components are warranted against defects in materials and workmanship for one (1) year.