Precision Check - Hitachi 902 Service Manual

(1)

Precision Check

(a) Statitical calculation is made for the result data of routine samples.
(b) Specify Precision Check on the MAINTENANCE screen.
(c) Statistical data for a maximum number of samples is calculated. Up to forty tests
including ISE assay are applicable.
(d) The statistical data shown in the following table is output.
Output Statistical Data
Data Count (N)
Maximum value (MAX) 6-digit real number with
Minimum value (MIN)
Mean value (MEAN)
Standard deviation
(SD)
Coefficient of variation
(CV)
(e) The result data is read from FD.
(f) The result data provided with an alarm is excluded from calculation (also not
counted for N). Note that reference value range over and overflow are excluded
from alarm.
(g) Statistics are not output for unmeasured tests and subsequent tests are placed
close.
(h) When N < 2, statistical calculation is not carried out.
Output Format
3-digit integral
sign/decimal point
Same as above
7-digit real number with
sign/decimal poin
Same as above
6-digit real number with decimal
point
7 - 46
Number of Digits below
Decimal Point
−
According to STD(1) CONC
Same as above
1 digit increased below
decimal point as compared
with STD(1) CONC
Same as above
Fixed at 2 digits