OHAUS Pioneer PJX Series, Service Manual

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CHAPTER 4 - TESTING
Pioneer PJX Series Service Manual 27 Ohaus Corporation www.ohaus.com
Enter the service menu (see Appendix B ) and adjust and record the following settings:
•
Set the Filter level to “Middle”.
•
Set the AZT (Auto Zero Tracking) to .5d (its lowest setting, 3d for 5 place model). Do not turn
it off.
Enter the User Menu and adjust the following settings:
•
Set the instrument to display the same units as the performance specifications.
(Usually kg, g, or mg)
Record Test Parameters:
•
Filter Level Setting = ____________
•
Auto Zero Tracking Setting = ____________
•
Displayed Units = ____________
•
Mass Used = ____________
Test Procedure:
1. Zero the instrument.
2. Using a test mass approximately half the capacity of the instrument, place the mass on the
center of platform. Record the reading on the worksheet provided.
3. Remove the mass from the platform.
4. Repeat this test starting at Step 1 until you record a total of ten readings.
Fill in the worksheet with the ten (10) readings.
TABLE 4-2 REPEATABILITY WORKSHEET
n Reading Delta = Reading – Mean Delta x Delta
1
2
3
4
5
6
7
8
9
10
n = number of Reading
Mean = Sum of readings / 10
Delta = Reading – Mean
Standard Deviation = Square Root of (sum of (Delta x Delta) / 9)