K41091 Micro Carbon Residue and Ash Tester
Operation and Instruction Manual
K41091-Manual
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7-
6.
Basic Functions of the Apparatus:
The apparatus has been designed to perform tests
for both carbon residue and ash.
WARNING:
It has been determined that at the
higher temperatures of 775°C for the Ashing test,
the temperature stability of the furnace is outside
the acceptable range of testing standards.
Two preprogrammed test procedures have been
developed and implemented into the instrument.
Program No. 1: Micro Carbon Residue
Start T (°C)
End T
(°C)
Duration
(min)
Gas Flow
50
50
10
NIT
50
500
36
nit
500
500
15
nit
500
50
1
NIT
Program No. 2: Ash
Start T (°C)
End T
(°C)
Duration
(min)
Gas Flow
50
50
10
NIT
50
775
60
NIT
775
775
120
AIR
775
50
1
AIR
Where:
Air = Low Flow Air
nit = Low Flow Nitrogen
AIR = High Flow Nitrogen
NIT = High Flow Nitrogen
During a test procedure, the instrument follows the
temperature profile of the program selected and
also manages the gas flow (air or nitrogen)
following the sequences defined in the program.
NOTE:
The gas flow rate
(High and Low Flow)
must be adjusted and set manually before starting
the test.
Flow meter Calibration Scale as per ASTM D4530
30mm = 150mL/min
120mm = 600mL/min
NOTE:
It is possible to follow the temperature of
the furnace by connecting an External PC to Serial
Line 1 and using the Data Acquisition Software
provided with the accessories of the instrument.
NOTE:
The calculation of residue percentage can
also be determined by the apparatus. Inputting the
initial and final weight of the samples into the
software will then calculate the residue percentage
automatically.
5.2 Starting a Test
WARNING:
For either program selected, the
Instrument must be placed under a hood to
evacuate the fumes generated by the furnace
during testing. When performing an Ashing Test, it
is highly recommended to reduce the light
distillation products in the sample by using
nitrogen to avoid any risk of spontaneous
combustion.
Rapid Combustion must not be
performed in the Furnace!
WARNING:
It is essential to understand the
standard test method of the test to be performed.
WARNING:
It will be necessary to work with a hot
furnace and samples before and after each test
run. Therefore, it is required for the operator to use
Personal Protective Equipment (PPE) and the
suitable accessories provided with the apparatus.
WARNING:
When conducting an Ashing Test it is
required to use quartz vials (sold separately). The
vials provided with the instrument are of
borosilicate glass and are intended for only the
Micro Carbon Residue Test.
1.
Check that the condensate tank is empty.
WARNING:
The oven temperature must be below
100°C before checking the condensate tank.
Figure 5: Condensate Tank Check
2.
Remove the Insulating Lid
