Rice Lake Chair Scales - Manual (Page 25)

Chair Scale Technical and Operating Instructions - Troubleshooting and Testing 21
7.0 Troubleshooting and Testing
Refer to the following instructions to check and correct any failure before contacting service personnel.
Symptom Possible Cause Corrective Action
Scale does not turn on Dead battery Connect the scale to a power source.
Faulty electrical outlet Use a different electrical outlet.
Bad power supply Replace adaptor.
Questionable weight or the scale
does not zero External object is interfering with the
scale Remove the interfering object from the scale.
Display did not show 0.0 before
weighing Help the patient off the scale, zero the scale and
begin the weighing process again.
Scale is not placed on a level floor Ensure the scale is level and begin the weighing
process again.
Scale is out of calibration Check the weight with a known weight value.
Improper tare Place the tare item on the scale. Press
REWEIGH. Once the weight of the item is
displayed, press TARE. Place the patient back on
the scale. Press the REWEIGH button again.
Weighing is performed but the display
shows WEIGH and REWEIGH every
few seconds; the weighing process
takes too long and no weight is
displayed The patient is not sitting still Ask the patient to be still.
The display shows a STOP message The load on the scale exceeds the
capacity of the scale Remove the excess weight and use the scale
according to manufacture’s specs.
The display shows LO Bat message The battery is low Recharge the battery.
The display shows Err message as
detailed in the table below
Err 2 Low saturation state (low A/D) The load cell is not connected properly. Check
the cables and mechanical connections. If the
problem persists, replace the set of load cells.
Err 3 High saturation state (high A/D) See Err 2
Err 6 Unstable weight. Cannot calibrate Check the load cells’ mechanical surroundings
and see that nothing touches them and that the
cables are properly welded.
Err 7 Mathematical error; division by zero.
Cannot calculate calibration factor. This error will show when trying to calibrate the
unit with no calibration weight on the unit.
Calibration or configuration settings
are messed up Pushed the wrong keys Reset to factory defaults. See Page 9 for
instructions.
The display shows a Con En message The configuration jumper is not in
place.
Install the configuration jumper on both pins. (see
page 4 for more information).
Table 7-1. Troubleshooting Table for the Rice Lake Scale Line