Metrohm 751 GPD Titrino - Manual (Page 57)

2.6. Parameters, key <PARAM>
751 GPD Titrino
54
Evaluation
Rates C8X
The rates are calculated by linear regression.
C80 is the mean rate over all points of the measuring point list.
C8X (9 ≤ X>0) are the rates in the specified time windows. At least 4 points are
necessary for an evaluation. If the limit of the time window does not coincide
with a current measured point, the next outer is taken as the limit, see example
below.
In monitoring, neither "wait" nor "hold" should be used as an action as otherwise
the resulting volume/time curve is no longer linear. The linear regression of such
a curve then results in high standard deviations.
Fix volume C5X
The associated volume at a specified time is interpolated from the measuring
point list.
Fix time C6X
The associated time at a specified volume is interpolated from the measuring
point list. The volume is entered as a fraction of the total dispensed volume. If
the volume remains constant over several measured points, the last associated
time value is taken.
The fix time for 1.0 V(tot) is evaluated after the final volume.
Example:
Specified time window for rate
evaluation: 40...100 s.
Used for the regression: 30...120 s
Fix time: 0.8 V(tot) ⇒ 1650 s
'mp
751 GPD Titrino 0P1/101 751.0020
date 1999-06-22 time 08:54 14
pH(init) 7.42 STAT pH ********
smpl size 1.0021 g
t/s V/ml pH T/°C mess.
0 0.0000 7.434 35.5
30 0.9140 3.039 35.7
60 1.0010 3.056 36.0
90 1.0780 3.022 36.2
120 1.1470 2.972 36.4
150 1.2250 3.018 36.5
:
:
1560 6.3290 2.994 37.0
1590 6.3290 2.998 37.0
1620 6.3290 2.998 37.0
1650 6.3290 2.998 37.0
1680 6.3465 2.975 37.0
: