Table c-1, Tandardization – Parr Instrument 6300 User Manual
Page 78
C
S
TANDARDIZATION
P a r r I n s t r u m e n t C o m p a n y
78
A
UTOMATIC
S
TATISTICAL
C
ALCULATIONS
(C
ONTINUED
)
Any outliers or other tests which should not be included
in the average EE Value must be deleted from the
memory using the memory management procedures
(see Chapter 8). A list of all tests associated with any
Cal ID can be printed from the Calibration Data Page
using Print Standardization Runs.
The user can elect to have any number of stored
standardization runs used in determining the EE value
by entering this number on Calibration Data & Controls
Page - Calibration Run Limit.
EE Max Std Deviation on this same page establishes
the maximum allowable standard deviation for the EE
Value before an error condition is reported. The default
value is zero which turns off this limit. But the user
should enter a value appropriate for the test being made.
Table C-1
Calorimeter Control Limit Values in J/g When Benzoic Acid is Used as a Test Sample
Accepted heat of combustion taken as 26454 J/g.
Instrument precision 0.10%.
Control limits based on 99% confidence (3 sigma) values.
Values are in J/g.
NUMBER OF
OBSERVATIONS
IN A GROUP
UCL FOR THE RANGE
(HIGH – LOW)
WITHIN THE GROUP
UCL FOR THE
RSD WITHIN
THE GROUP
MAXIMUM PERMISSIBLE DEVIATION
OF THE GROUP MEAN FROM THE
ACCEPTED VALUE OR GRAND MEAN
1
79.4
2
97.5
0.261%
56.1
3
115.3
0.228%
45.8
4
124.3
0.209%
39.7
5
130.1
0.196%
35.5
6
134.3
0.187%
32.4
7
137.6
0.181%
30.0
8
140.4
0.175%
28.1
9
142.7
0.171%
26.5
10
144.7
0.167%
25.1
11
146.4
0.164%
23.9
12
147.9
0.161%
22.9
13
149.4
0.159%
22.0
14
150.7
0.156%
21.2
15
151.8
0.154%
20.5
16
153.0
0.153%
19.8
17
154.0
0.151%
19.2
18
154.9
0.150%
18.7
19
155.8
0.148%
18.2
20
156.7
0.147%
17.7
21
157.4
0.146%
17.3
22
158.2
0.145%
16.9
23
158.9
0.144%
16.5
24
159.5
0.143%
16.2
25
160.2
0.142%
15.9