TSI Instruments DustTrak 8520, Operation And Service Manual

Page: 31 / 89

Operation 21
Analog Output
Newer models of the Model 8520 D
UST
T
RAK
Aerosol Monitor contain an
analog output feature. This means the instrument is capable of providing an
analog voltage signal that is proportional to mass concentration.
Note: Before using this feature, it is important to read this operational
section. For further information, please see Application Note
ITI-073, which describes the Analog Output programming and
operation. This Application Note is available at the TSI website,
http://www.tsi.com.
Because the D
UST
T
RAK
monitor measures aerosol over such a wide dynamic
range, it is necessary to select the appropriate range before using the analog
output feature. The instrument may be programmed to one of four options,
using the T
RAK
P
RO
software. When shipped from the factory, the instrument
is programmed to the lowest range. To select the analog output range, do the
following:
1. Turn on the D
UST
T
RAK
monitor and start the T
RAK
P
RO
software
(version 3.2 or higher).
2. Select Parameters , Analog Output , from the Instrument Setup menu.
The following dialog is displayed:
3.
Select one of the four ranges, and press Send .
Please note the following considerations when using the analog output
feature.
•
The analog output function is always “On.” You do not need to activate
this function.
•
The interpretation of the analog output voltage is directly tied to the
chosen range. For example, at the lowest range, each “0.001 mg/m
3
” of