Miscellaneous
147
Low = de-energized ( Zero volts on the coil )
High = energized ( 24 V DC on the coil )
Opening and closing of the furnace, sequence:
6.2.3.1 Opening the furnace:
At the moment when the key is pressed to open the furnace,
V1, V2 and V4 are energized.
V1 releases the oxygen out of the furnace.
V2 stops the oxygen supply to the furnace.
V4 keeps the oxygen flow to the IR-cell, bypassing the furnace.
About one second later, the pressure in the furnace drops lower than one bar ( 15
psi ) so that the pressure switch opens ( no contact any more )
resp. 24V DC between its two leads.
After a short delay produced by the software, thus allowing sufficient time for the
oxygen pressure in the furnace to fall practically to zero, the pneumatic valve is de-
energized, causing the piston to move down, opening the furnace.
6.2.3.2 Closing the furnace:
By pressing the key to close the furnace, the pneumatic valve is energized and the
piston moves up. At the same time V3 is also energized, letting oxygen into the
furnace area from the top and from the bottom ( through the dust filter ).
Before the furnace closing cone reaches the O-ring to seal, the oxygen which
enters the furnace area escapes, purging the air out of the furnace. After the cone
seals the furnace, the incoming oxygen leads to a growing pressure in the furnace.
When this pressure reaches approx. one bar ( 15 psi ) the pressure switch will
close ( zero volts between its two leads ).
After a short delay by the software, V2, V3 and V4 will be de-energized.
The closed furnace condition is now reached.
Pos: 11.6 /0020 Überschriften/ELTRA 1.1 Überschriften/11 Spare parts kit s @ 7\ mod_1382427709237_9.docx @ 50008 @ 2232232 @ 1
6.3 66BSpare parts kits
Pos: 11.7 /0 010 ELTR A/ 0015 s ervic e_i nstr uc tio ns/C S-800 _Ser vice/ 0030 So nstig es/30 15 Mod ul Spar e parts ki ts @ 7\mod_1382427765325_9.docx @ 50019 @ 321222333333333 @ 1
6.3.1 130BCommon spare parts kit for all analysers
Part
Number
description
quantity
05048 Infrared source (emitter) 1
05060 Reflector 1
05064 Chopper motor 1
05067 IR path for high carbon 1
05068 IR path for sulphur 1
05150 IR path connector with window source side 1
05160 IR path connector with window detector side 1
05260 IR path tube (80 to 320 mm) 1
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