Parr Instrument 6725 - Manual (Page 22)

6725
Semi-micro Calorimeter Instruction Manual
4-2
5. Help. This key is used to access help screens related to the menu currently
displayed on the touch screen.
6. This key appears in the Escape key location when the main menu is displayed.
This key is used to shut down the calorimeter program before turning off the power.
Programming
The program in the 6772 Calorimetric Thermometer can be extensively modified to tailor
the unit to a wide variety of operating conditions, reporting units, laboratory techniques,
available accessories and communication modes. In addition, the calculations,
thermochemical corrections and reporting modes can be modified to conform to a
number of standard test methods and procedures. Numerous provisions are included to
permit the use of other reagent concentrations, techniques, combustion aids and short
cuts appropriate for the user’s work.
Note:
Changes to the program are made by use of the menu structure. Any of these items can
be individually entered at any time to revise the operating program.
Default Settings
The 6772 Calorimetric Thermometer is preprogrammed with default settings for use with
the 1341 Plain Jacket Calorimeter. Therefore, the following parameters must be
changed in the Calorimetry Parameters menu found in the Diagnostics Menu.
Correction (K) Parameters:
K1 0.5
K2 0.00040
K3 1.0
K4 0.0
K5 0.0
Blackout
(B) Parameters:
Mis-Fire Blackout (B2) 6
Derivative Blackout (B3) 0.5
Dynamic Blackout (B4) 6
Equilibrium Blackout (B5) 36
Dynamic Derivative Blackout (B6) 0.02
Dynamic Time Blackout (B7) 20
It is recommended that a Fixed Acid value of 1.5 be set on the Thermochemical
Corrections menu.
A more in-depth explanation of these parameters is found on the corresponding
parameter group help pages. These default settings remain in effect until changed by
the user. Should the user ever wish to return to the factory default settings, go to the
Program Info and Control Menu, User/Factory Settings, touch Reload Factory Default
Settings and YES. Non-volatile memory is provided to retain any and all operator
initiated program changes; even if power is interrupted or the unit is turned off. If the unit
experiences an intentional or unintentional “Cold Restart”, the controller will return to the
last known settings.