Rice Lake Washdown - Manual (Page 16)

12 RoughDeck Low Profile Floor Scale
4.0 Service information
4.1 Troubleshooting Guide
System Does not Operate—no Display
• Power disconnected: Check and reconnect.
• Indicator fuse blown. Replace fuse. Check for cause.
• Interface cable cut or disconnected: Repair.
• Signal leads incorrectly installed at indicator: Install according to indicator installation manual
Display Stays at Zero
• Indicator faulty: Service indicator
• Load cell connections faulty: Check cable connections in junction box and at indicator
Erratic Weighs
• Vibration near scale: Remove source of vibration or move scale.
• Platform not level to within
1
/
4
in: Level scale by adjusting feet or shimming if necessary.
• Load cell or cable water damage: Replace.
• Debris under load cells or platform: Clean.
• Indicator faulty: Use simulator to test indicator for stability. Service indicator.
Consistently High or Low Weights
• Indicator not properly adjusted to zero: Zero the indicator according to indicator manual.
• Platform binding: Obtain adequate clearance for free platform movement.
• Indicator not calibrated: Calibrate according to indicator manual and Section 3.3 on page 11.
• Load cells faulty: Test and replace load cells if necessary.
• Feet touching deck underside: Adjust feet downward to provide clearance.
4.2 Periodic Maintenance
The space between the platform side and pit frame, and the surface beneath the platform must be periodically
cleaned to prevent debris build up. More frequent cleaning of these areas is necessary with scales mounted in pits.
Important
Do not attempt to use scales with load cells that are not hermetically sealed in washdown
applications. Water damage is a common cause of failure in non-hermetically-sealed load cells
Use care with high pressure steam washdowns for hermetically-sealed load cells. The steam may not damage the
load cells, but the elevated temperatures may cause incorrect readings until the unit cools to room temperature.
4.3 Load Cell Replacement
Overload Stops on
HC Models only
Figure 4-1. Load Cell Assembly
Remove Load Cell
1. Lift scale with chains and proper spreader bar, see Section 2.4 on
page 5.
2. Remove defective load cell
3. Remove foot from load cell.
4. Disconnect load cell cable from junction box and cut cable ties.
5. When the cable is freed, pull cable out of the scale frame
channels.