8
Mechanical Chair Scale Installation and Operation Instructions
3.0
Zero Adjustment
To ensure accurate weighments, a zero adjustment should be done to the scale upon arrival and setup. To perform
a zero adjustment, perform the following steps.
1. Ensure the scale is sitting on a level surface.
2. Check the eye loop area of the scale to ensure that the scale pointer is equally balanced between the eye
loop area.
Eye Loop
Area
Z e r o
A d j u s t i n g
Screw
Scale pointer
Large poise
weight
Figure 3-1. Eye Loop Area and Zero Adjusting Screw Location (Lb/Kg model shown)
3. If the scale is not balancing properly, then the small zero balance weight must be adjusted. Turn the zero
adjusting screw (shown in Figure 3-1) using a flat head screwdriver. By adjusting the screw, the zero
balance weight will move accordingly.
4. The scale is now ready to weigh patients.
5. Have the patient sit down on the molded seat.
The patient should be completely seated in the chair,
not leaning forward, and having feet firmly positioned on the footrest assembly
.
Important
For units having both lb/kg weighing capability, ensure that the large poise
weight sits directly above the desired weight reading on the weigh beam. Note
that lb readings are in white and kg readings are in black.
