Teledyne 6200T - Sulfides Analyzer - Manual (Page 31)

6200T Total Sulfur Analyzer Introduction
Teledyne Analytical Instruments 31
1.6. The M501TS – Total Reduced Sulfur Converter
The M501TS oxidizes reduced sulfur compounds to SO
2
in a high temperature quartz
oven. A front-panel-mounted, programmable digital temperature controller regulates
power to the heater. Power to the heater is switched by a solid state, zero-crossing relay.
An over/under-temperature alarm contact closure is located on the rear panel. The alarm
set point is adjustable in the temperature controller. The heater temperature is sensed by
a Type S (distinguished from other thermocouple types by its wire colors, red and black;
see table below) (Platinum-Rhodium) thermocouple probe inserted in the bore alongside
the quartz tube. Note: If using a type K or N thermocouple, or if switching to a type S
thermocouple, please refer to Sections 3.4.1.1 and 12.8.4 for proper controller
configuration.
The quartz tube carrying the sample mixture runs through the core of the heater and is
heated by radiation from electrical heating elements at the heater bore surface. See
Figure 1-4 for a layout view of the converter.
Table 1-2: Thermocouple Type Distinctions
Thermocouple Type Indicated by Wire Color
S red and black
K red and yellow
N red and orange
WARNING !
ENSURE PROPER LINE VOLTAGE IS SELECTED PRIOR TO PLUGGING UNIT
INTO POWER SOURCE.
CAUTION!
THE QUARTZ TUBE AND HEATER ARE VERY HOT
DO NOT TOUCH
CAUTION!
ENSURE THAT YOU SELECT THE CORRECT SETTING) FOR THE
THERMOCOUPLE TYPE THAT YOU HAVE! (see Table