Parr Instrument 6725 - Manual (Page 35)

6725
Semi-micro Calorimeter Instruction Manual
5-8
• Charted
Value:
Toggles the charted value between the HOC Standard (Heat Of Combustion of
Standard) and Energy Equivalent.
• Process
Sigma:
In relation to calorimetry, sigma is used as the classification of the instrument.
The higher the process sigma the higher the limits for acceptable values for
precision control.
The Process Sigma of the 6772 will depend on the application.
• Temp. Rise High Warning:
Sets the high warning limit on the bucket temperature rise. A temperature rise
higher than this value will generate a warning message.
• Temp. Rise Low Warning:
Sets the low warning limit on the bucket temperature rise. A temperature rise
lower than this value will generate a warning message.
Use Bomb:
Displays the bomb number of the bomb currently being used in the Calorimetric
Thermometer and toggles through the four possible bomb numbers.
Bomb 1:
Leads to sub-menu, Bomb 1. Displays
standardization information for bomb and
bucket combinations. While only one
bomb and bucket is installed in the
calorimeter at a time, a spare may be
used for servicing and for more rapid turn-
around. The respective EE values for
each bomb can be stored in memory.
Note:
For rapid turn around between tests,
the user may wish to use an extra
bomb. Each bomb can be assigned a
bomb number if the EE Values are significantly different. On the Data Entry
Controls Menu, set the Prompt for Bomb ID to “ON”.
The following four values are displayed for the Bomb # shown in the title on top of the
screen.
• Bomb EE Value. Displays the calculated EE value.
• # Runs, EE Val. Displays how many runs have been used to determine the EE
value.
• Rel. Std. Dev. Displays the relative standard deviation for the series of tests used
to determine the current EE value in percent of the EE value.
• Bomb Fire 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