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Notes (all units):
The Initial period is required to stabilise the vessel temperature. The main (Final, measuring) period
measures the temperature rise from firing to the end. During both periods data a captured which are
used when the result is calculated.
7
MODE CHANGES
The CAL3KA/AP have four operating modes, all other units work in mode=0.
Mode
Mode=0
DYNAMIC
Mode=1
ADIABATIC
Mode=2
ISOTHERMAL
Mode=3
FAST DYNAMIC
Each mode (and Vessel) must be calibrated if you intend using this mode. Once calibrated the mode can
be changed without re-calibration. Note that a max. of 4 vessels are allowed per mode.
The CAL3K-S/ST have one vessel or two respectively.
There is a trade-off between operating speed and accuracy. The decrease in accuracy is dependent on
the laboratory conditions and in the number of vessels you use.
The mode=3 FAST DYNAMIC can be used without any decrease in accuracy and repeatability if you use
four vessels and operate in airconditioned ambient temperature.
The operating mode can be set by:
82
SET OPS MODE
Each of these modes has its own calibration, which means the vessel(s) must be calibrated in the new
mode.
Each of the modes has its own default parameters. The most preferred mode is 0=dynamic, followed by
3=Fast Dynamic.
DDS CALORIMETERS OPERATIONS MANUAL V1.1
Initial time, Minutes
3
3
4
2
1
2022
Digital Data Systems (Pty) Ltd.
CAL3K Advanced Bomb Calorimeters
www.ddscalorimeters.com
Main Time, Minutes
4
5
5
3
Website:
www.ddscalorimeters.com
10
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