Parr Instrument 6400 - Manual (Page 43)

6400
Calorimeter Instruction Manual
5-11
Thermochemical Corrections Menu
The Thermochemical Corrections Menu
permits three types of fixed corrections
for standardization (instrument
calibration) runs, and the same three
types for determination (test) runs.
Pressing the LEFT side of each key
toggles the correction ON or OFF.
Press the RIGHT side of each key to
access the specific numeric dialog box
where that fixed value can be set. Each
value entered for these fixed corrections
is used in all preliminary reports.
When any fixed correction is set to ON,
the specified value will be used in the
final reports, and the 6400 will not prompt for actual corrections to be entered. (If all
corrections are fixed, only a final report will be generated).
When any fixed correction is set to OFF, during the data entry reporting steps the user
will be prompted to enter an appropriate desired value which will be used in the final
report.
Standardization Corrections
Fixed Fuse Correction:
Press this key on the LEFT side to toggle ON or OFF the fixed fuse correction for
standardization runs. Press it on the RIGHT side to access the Fixed Fuse numeric
dialog box on which the value can be set. An appropriate fixed fuse value is 50 calories.
Fixed Acid Correction:
Press this key on the LEFT side to toggle ON or OFF the fixed acid correction for
standardization runs. Press it on the RIGHT side to access the Fixed Acid numeric dialog
box on which the value can be set. An appropriate fixed acid (nitric acid) value is 8
calories when one-gram benzoic acid pellets are used to calibrate the instrument.
Fixed Sulfur Correction:
Press this key on the LEFT side to toggle ON or OFF the fixed sulfur correction for
standardization runs. Press it on the RIGHT side to access the Fixed Sulfur
numeric dialog box on which the value can be set. When benzoic acid is used as
the calibrant, a fixed sulfur value of 0 should be used.
Determination Corrections
Fixed Fuse Correction:
Press this key on the LEFT side to toggle ON or OFF the fixed fuse correction for
determination runs. Press it on the RIGHT side to access the Fixed Fuse numeric dialog box
on which the value can be set. An appropriate fixed fuse value is 50 calories.