OHAUS Explorer Balances, Руководство по обслуживанию

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CHAPTER 4 - TESTING
Ohaus Corporation www.ohaus.com 50 Explorer
®
Series Service Manual
5. Place the test mass on the Balance, record the weight and remove.
6. Place Load 3 on the Balance and press TARE.
7. Place the test mass on the Balance and record the weight.
8. The difference in the weights of the test mass should be within the tolerance in Table 4-2. If
the differences are out of tolerance, verify the test conditions and repeat the test.
9. If the Balance remains out of tolerance, the Load Cell may need to be replaced.
4.4.4 Off-Center Load Test
The Off-Center Load Test is used to determine whether displayed weight values are affected by
moving the sample to different areas of the Pan. OCL test may also be referred to as a Shift Test
(NTEP) or an Eccentricity Test (OIML).
The test weight used in this test 1/3 the capacity of the balance. See table for the test weight
values.
TABLE 4-4 OFF CENTER LOAD MASS VALUES
Model OCL Mass Value Notes
EX124 50g 1. The class of the weight used in
OCL testing is not critical.
2. Use large weights where
possible. Smaller weights can be
stacked on the larger but a stability
problem may occur if many
smaller weights are used. If
weights cannot be stacked they
must be placed uniformly over the
segment.
EX224 100g
EX324, M, N 100g
EX223 100g
EX423 200g
EX623 200
EX1103, M, N 500g
EX2202 1000g
EX4202 2000g
EX6202 2000g
EX10202, M, N 3500g
EX6201 2000g
EX10201 3500g
EX12001 4000g
EX24001 8000g
EX35001 12000g
The test positions (A-D) must be centrally located in each segment.
A
B
D
C
A
B
D
C
Round Pan Rectangular Pan