296
F
FURNACES
Gold Cupellation
CF Series, Cupellation Furnaces for the Assay of
Precious Metals
CF Series
Features:
●
1200°C maximum operating temperature
●
Models with a maximum charge capacity of 15, 24, 50 or
60 number 8 cupels
●
Alternatively 24, 32, 72, or 90 number 6 cupels
●
Designed for testing using the cupellation method to
IS011426: 1999 the standard test method used by the
United Kingdom Assay Office, a reference quantitative
assay method laid down by the International Hallmark
Convention
●
The CF furnaces are internationally renowned for their
close temperature uniformity and hazardous fume
control*
●
Airflow controlled by an adjustable valve, is preheated
before entering the work chamber
●
Silicon carbide elements mounted above & below the
chamber provide even heating of cupels, have good
resistance to thermal shock & offer extended working life
at high temperatures
●
Fumes are extracted through insulated exhaust duct, with
removable chamber below chimney to collect
condensed lead
●
Up & away counterbalanced vertically opening door
complete with observation hole
●
Silicon carbide lined roof & hearth resist the corrosive
fumes emitted during the cupellation process
●
Includes 7 day, 24 hour time switch.
* Fumes are extracted through an insertable exhaust duct and removable container below the chimney.
Options:
●
Modified configurations are available to fit existing
fume extraction systems.
Note:
The furnace should be positioned beneath an
efficient fume extraction system preferably fitted with
a proprietary lead filter.
Model
CF 15
CF 24
CF 50
CF 60
Max. temp. (°C)
1200
1200
1200
1200
Internal H x W x D(mm)
125x220x350
205x255x460
230x350x540
250x400x650
External H x W x D(mm)
1059x950x950
(bench mounted)
225x600x380
(Separate control module)
2110x1050x1070
(floor standing)
2100x1150x1100
(floor standing)
2100x1200x1200
(floor standing)
Volume (Liters)
15
24
50
60
Max. power (W)
9000
13000
20000
3100
Thermocouple type
Pt/Pt 13% Rh
Type R
Pt/Pt 13% Rh
Type R
Pt/Pt 13% Rh
Type R
Pt/Pt 13% Rh
Type R
Weight (kg)
306
Power supply
required per phase
a1
=68A,
h3
=23A,
a3
=40A
a1
=87A,
h3
=28A,
a3
=50A,
j3
=30A
h3
=45A,
e3
=78A,
k3
=45A
h3
=62A,
a3
=107A,
k3
=62A
a1
=Single 200-240V,
a3
=200-240V 3 phase delta,
e3
=230-240V 3 phase delta,
h3
=380-415V 3 phase+N,
j3
=440-480V 3 phase no N,
k3
=440-480V 3 phase + N.
