Metrohm 796 Titroprocessor - Manual (Page 128)

7.10 Calculations / Formulas
796 Titroprocessor, Instructions for use 122 122
IM Initial measured value (unit depends on mode)
SM Measured value after the start phase of a titration or measure-
ment
CM Measured value at end of a titration or measurement
SV Added starting volume in mL
CV Added volume at end of a titration in mL
C Concentration of reagent (value without units)
HNV# HNP volume in mL (half neutralization potential)
HNP# HNP value (unit depends on mode)
AP Asymmetry pH (pH
as
) of the calibrated sensor used
SL Slope of the calibrated sensor used
DRC Volume drift in conditioned status (in µL/min)
DOD Dosing duration in s, length of the dosing increments added
together (for SET and KFT modes)
ITD Duration between end of conditioning and start of the
following titration in s
$RN Sample number, run number
$AS Autostart counter
$CRF Conditioning flag (conditioning OK, yes/no (1/0)
COV Conditioning volume in mL
$BC Buffer counter
$LV Live volume in mL, added volume to live value display
$LM Live value, actual value to live value display
$LD Live measurement duration in s, actual duration to live value
display
7.10.2 Mathematical functions
+ Addition
– Subtraction
* Multiplication
/ Division
^ Exponentiation
( ) Expression in brackets
LOG( ) Decimal logarithm
EXP( ) Decimal exponent
LN( ) Natural logarithm
SQRT( ) Square root
TST( , ) Test function (tested variable, substitution term)
ABS() Absolute value (unsigned)
All the above mathematical functions can be used in formulas. Expressions
in brackets can be combined at will. The recognized rules of priority for
mathematical functions apply. The formula editor has an automatic syntax
checking function.
If errors such as missing or invalid variable contents occur while the calcula-
tion formulas are being carried out (at the conclusion of the titration or
measuring mode) then a warning is given and the error message is entered
in the error list on the result page. The error list is included in the result re-
port.