OHAUS Explorer Balances - Testing; Test Masses Required

CHAPTER 4 - TESTING
Explorer
®
Series Service Manual 45 Ohaus Corporation www.ohaus.com
4 TESTING
Before and after servicing an Explorer
®
balance, an operational test and various performance tests
should be made to confirm if the balance meets specifications. Turn the balance on and allow it to
warm up for at least one hour before performing these tests. The Analytical models need up to 4
hours to stabilize.
NOTE:
Make sure the test area is free from drafts and that the balance rests on a level and vibration-
free surface. The Analytical models especially need a solid platform, such as a stone table.
4.1 TEST MASSES REQUIRED
The masses required to test the Ohaus Explorer
®
balances must meet the requirements of the
ASTM or OIML Tolerances listed in the table. Poor quality calibration masses be the can cause of
frustrating diagnostics.
TABLE 4-1 CALIBRATION MASS VALUES
Model
Span Calibration Points
Weight Class
EX124
50g, 100g
ASTM Class 1
OIML E2
EX224
100g, 150g, 200g
ASTM Class 1
OIML E2
EX324, M, N
150g, 200g, 300g
ASTM Class 1
OIML E2
EX223
100g, 150g, 200g
ASTM Class 1
OIML E2
EX423
200g, 300g, 400g
ASTM Class 1
OIML E2
EX623
300g, 400g, 500g, 600g
ASTM Class 1
OIML E2
EX1103, M, N
500g, 1000g
ASTM Class 1
OIML E2
EX2202
1000g, 2000g
ASTM Class 1
OIML E2
EX4202
2000g, 3000g, 4000g
ASTM Class 1
OIML E2
EX6202
3000g, 4000g, 5000g, 6000g
ASTM Class 1
OIML E2
EX10202, M, N
5000g, 10,000g
ASTM Class 1
OIML E2
EX6201
3000g, 4000g, 5000g, 6000g
ASTM Class 2
OIML F1
EX10201
5000g, 10,000g
ASTM Class 1
OIML E2
EX12001
3000g,5000g,10000g, 12000g
ASTM Class 2
OIML F1
EX24001
10000g,15000g,20000g,
24000g
ASTM Class 1
OIML F1
EX35001
10000g,20000g,30000g,
35000g
ASTM Class 1
OIML F1
Note: Factory default settings are shown in bold. The calibration setting can be changed to allow
the other choices.