Metrohm 746 VA Trace Analyzer User Manual
Page 238
5.5.2 RESULTS
746 VA Trace Analyzer / 747 VA Stand
5-87
Parameter
Range; Default value / Meaning
V0.sample
display only
Sample volume in measuring vessel (variable V0)
Display of the sample volume in the measuring vessel at the start of
measurement with numeric value and unit (L, mL,
µ
L, etc.).
The sample volume in the measuring vessel can be used in formulae
as
VO
for further calculations. It should be noted that this value is put
out in such cases in the base unit L without prefix (see section 5.6.4).
This field remains empty (
–
) if no calibration technique has been
selected (
Technique = none
).
The nature of the sample volume display depends on whether
•
Sample size/S0
has been entered as a volume or a weight (see
section 5.4.4),
•
work has been performed with undiluted (
V.fraction
= empty)
or diluted (
V.fraction
not empty) samples (see section 5.4.4),
•
only part of the sample quantity defined by
Sample size/S0
or
V.fraction
has been transferred to the measuring vessel on the
695 Autosampler (dilution factor f
AS
).
The dependency of
V0.sample
on these factors is shown in the
following Table:
S0 S2
V.fraction
V.total
V0.sample without
Autosampler
V0.sample with
Autosampler
L
–
–
–
S0
S0 *
f
AS
g
d
–
–
S0/S2
S0/S2 *
f
AS
L
–
V.fraction V.total
V.fraction
V.fraction *
f
AS
g
–
V.fraction V.total
V.fraction
V.fraction *
f
AS
You will find several numeric examples to clarify this table in the
explanation of the parameter
Sample size/S0
on the "SAMPLES"
page (see section 5.4.4).
Comments
display only
Comments
Display of comments if any type of error or difficulties appeared in the
determination of the mass concentration
ρ
s
of the substance.
The following comments are possible:
conc. out of range
The mass concentration
ρ
s
of the substance
Mass conc.
is outside the working range
Range min...Range max
defined on the
"SUBSTANCES" page.
dev.estimated
The total deviation
MC.dev.
could only be
estimated (see sections 6.9.5/6.9.6).
no cal.deviation
Calculation of the calibration deviation
Cal.dev.
is not possible as insufficient cali-
bration points are available (see sections
6.9.5/6.9.6).
no meas.deviation
The determination of the measurement de-
viation
Meas.dev.
is not possible as only 1
measured point is available (see section
6.9.4).