CHAPTER 2 DIAGNOSTIC GUIDE
Valor
™
7000 Series Service Manual
2-3
Ohaus Corporation www.ohaus.com
CAUTION:
IN THE NEXT STEP, DO NOT OVERLOAD THE SCALE BEYOND FULL
CAPACITY RATING.
–
Measure the voltages on +SIG and
–
SIG wires, disconnected from PCB.
Note:
Measurements must be made with these wires disconnected from the
PCB. These measurements represent the output of the Load Cell. Record
measurements at Zero Load, 50% and full scale capacities. See Table 2-3 for
typical readings.
Figure 2-1. Top view of main PCB.
NOTE
: Table 2-3 indicates typical readings. Actual values can vary, but should
remain linear throughout the range. If readings are out of tolerance, replace the
Load cell. (See Section 3.6.)
TABLE 2-3. LOAD CELL OUTPUT READINGS (in mV/V with 3.1V Excitation)
Model/Capacity
Zero Load
50% Load
100% Load
V71P1502T / 1.5kg
0.492666667
0.992666667
1.49266667
V71P3T / 3kg
0.2956
0.8956
1.4956
V71P6T / 6kg
0.1478
0.7478
1.3478
V71P15T / 15kg
0.0739
0.8239
1.5739
V71P30T / 30 kg
0.03695
0.78695
1.53695
