Parr Instrument 6200 - Manual (Page 50)

51
6200
Calorimeter Operating Instruction Manual
Calibration
and Data
Controls
Menu
Continued
EE Max Std Deviation. Displays the
maximum relative standard deviation
in percent that will be permitted for
any EE value calculated by the
calorimeter and accesses the sub-
menu on which this limit is set. If this
value is exceeded, the user
will be warned to take corrective action
before proceeding with testing. This
calorimeter is capable of achieving a value
of 0.15 or better for 15 tests. A setting of
zero disables this check.
Heat of Combustion of Standard.
Displays the heat of combustion in calories
per gram for the material used to
standardize the calorimeter and accesses
the sub-menu on which this value is set. For
benzoic acid, this value is 6318.4 calories
per gram.
Bomb Service Interval. Displays the
maximum number of times a bomb may be
fired before it is flagged as due for service
and accesses the sub-menu on which this
limit is set. Parr recommends 500 firings for
this service interval. This interval may be
more frequent depending upon the nature of
the sample.
Use Bomb. Displays the bomb number of
the bomb currently installed in the
calorimeter and toggles through the four
possible bomb numbers.
Bomb 1. Leads to sub-menu, Bomb 1.
Displays standardization information for
bomb and bucket combinations with the
respective EE values for each bomb being
stored in the memory.
Note:
For rapid turn around between tests, user
may wish to use two bomb assemblies in
the calorimeter. Each bomb/bucket can be
assigned a bomb number if the EE Values
are significantly different. Set prompt for
bomb ID to “ON”
Bomb 1
EE Value. Displays the calculated EE value for
the corresponding Bomb 1.
Number of Runs. Displays how many runs have
been used to determine the EE value.
Relative Standard Deviation. Displays the relative
standard deviation for the series of tests used to
determine the current EE value in percent of the
EE value.
Bomb Firing Count. Displays the current bomb
firing count or the number of times the bomb has
been fired since it was last serviced. When this
count matches the limit set by Bomb Service
Interval, the user will be informed that the bomb is
ready for service.
Protect EE Value. When set to ON, protects the
EE values if the user does not wish to have the
calorimeter automatically update its own EE
value.
Update Statistics. This key will cause the
EE Value for this calorimeter ID to be
updated using all standardization runs
currently in memory if the EE value is not
protected.
A-7
APPENDIX A