Thermo 42i, Instruction Manual

Page: 21 / 314

Introduction
Specifications
Thermo Electron Corporation 42
i
Low Source Instruction Manual 1-3
NO
2
, and NO
x
concentrations to the front panel display, the analog
outputs, and also makes the data available over the serial or ethernet
connection.
Figure 1-1. Model 42
i
Low Source Flow Schematic
Specifications
Table 1-1. Model 42
i
Low Source Specifications
Preset ranges 0-0.2, 0.5, 1, 2, 5, 10, 20, 50, 100 ppm
0-0.5, 1, 2, 5, 10, 20, 50, 100, 150 mg/m
3
Extended ranges 0-1, 2, 5, 10, 20, 50, 100, 200, 500 ppm
0-2, 5, 10, 20, 50, 100, 200, 500, 750 mg/m
3
Custom ranges 0-0.2 to 100 ppm (0-1 to 500 ppm in extended ranges)
0-0.5 to 150 mg/m
3
(0-2 to 750 mg/m
3
in extended ranges)
Zero noise 0.005 ppm RMS (60 second averaging time)
Lower detectable limit 0.01 ppm (60 second averaging time)
Zero drift (24 hour)
≈
0.005 ppm
Span drift (24 hour)
±
1% full-scale
Response time
(NO/NO
x
mode)
15 sec (10 second averaging time)
85 sec (60 second averaging time)
305 sec (300 second averaging time)