Teledyne T100 Manuale Utente

This measurement is stored in the analyzer. Memory as the test function PMT TEMP 
and  is viewable  as a test function (refer to Section 4.1.1) through the analyzer’s front 
panel. 

SAMPLE GAS PRESSURE SENSOR: This sensor measures the gas pressure at the 
exit of the sample chamber.  

SAMPLE FLOW SENSOR: This sensor measure the flow rate of the sample gas as it 
exits the sample chamber.  

13.5.8.3. THERMISTOR INTERFACE 

This circuit provides excitation, termination and signal selection for several negative-
coefficient, thermistor temperature sensors located inside the analyzer. They are as 
follows: 

SAMPLE CHAMBER TEMPERATURE SENSOR: The source of this signal is a 
thermistor imbedded in the of the sample chamber block. It measures the temperature of 
the sample gas in the chamber. The data are used by the CPU to control sample chamber 
the heating circuit and as part of the SO

2

, calculations when the instrument’s 

Temperature/Pressure Compensation feature is enabled.  

This measurement is stored in the analyzer. Memory as the Test Function RCEL TEMP 
and is viewable as a test function (refer to Section 4.1.1) in the analyzer’s front panel 
display. 

IZS OPTION PERMEATION TUBE TEMPERATURE SENSOR: This thermistor, 
attached to the permeation tube in the IZS option, reports the current temperature of that 
tube to the CPU as part of control loop that keeps the tube at a constant temperature. 

BOX TEMPERATURE SENSOR: A thermistor is attached to the motherboard. It 
measures the analyzer’s internal temperature. This information is stored by the CPU and 
can be viewed by the user for troubleshooting purposes through the front panel display. 
This measurement is stored in the analyzer‘s memory as the test function BOX TEMP 
and is viewable as a test function (refer to Section 4.1.1) in the analyzer’s front panel 
display. 

The analyzer comes equipped with four Analog Outputs: A1, A2, A3 and a fourth that is 
a spare. 

A1 and A2 Outputs: The first two, A1 and A2 are normally set up to operate in parallel 
so that the same data can be sent to two different recording devices. While the names 
imply that one should be used for sending data to a chart recorder and the other for 
interfacing with a data logger, either can be used for both applications.  

Both of these channels output a signal that is proportional to the SO

2

 concentration of 

the sample gas. The A1 and A2 outputs can be slaved together or set up to operated 
independently. A variety of scaling factors are available; refer to Section 5.4 for 
information on setting the range type and Section 5.9.3 for adjusting the electronic 
scaling factors of these output channels 

Test Output: The third analog output, labeled A3 is special. It can be set by the user 
(refer to Section 5.9.9) to carry the signal level of any one of the parameters accessible 
through the TEST menu of the unit’s software. 

06807C DCN6650