Parr Instrument 6400, Operating Instructions Manual

Page: 32 / 110

4
Menu Descriptions
P a r r I n s t r u m e n t C o m p a n y
30
Operating Controls Menu
Method of Operation:
Offers an operating mode of
either dynamic or equilibrium. In most cases, the
dynamic mode with its curve matching capability
will save approximately 3-4 minutes per test and will
produce the same operating precision as the slower
equilibrium mode.
Reporting Units: Offers a choice of BYU/lb, cal/g,
J/kg, or MJ/kg for the reporting units. A user
selected set of reporting units may be chosen by
selecting “other”.
Spiking Correction: Accesses the Spike Controls
sub-menu. “Spiking” is the addition of material,
such as benzoic acid or mineral oil, to samples
which are difficult to burn in order to drive the
combustion to completion.
Spiking Controls
Use Spiking: When set to ON, the calorimeter
will prompt for the weight of the spike added
and will compensate for the heat of combus-
tion in the calculations.
Heat of Combustion of Spike: The heat of
combustion of spike is entered on sub-menu
keyboard in cal/g.
Use Fixed Spike: When set to ON, a constant
amount of spike is to be added to each test.
Weight of Fixed Spike: The weight of the fixed
spike is entered on sub-menu keyboard.
Note: The precision of tests with fixed spikes
can be no better than the accuracy of the
spike weight.
Prompt for Spike before Weight: When set to
ON, the calorimeter will prompt the user for
the weight of the spike and then the weight
of the sample. Normally the calorimeter will
prompt the user for the weight of the sample
and then the weight of the spike.
Bomb Rinse Tank Controls:
Accesses the Rinse Tank
Controls sub-menu. Wash water for the bomb is
drawn from the Bomb Rinse Tank