Teledyne 7500ZA - Infrared Gas Analyzer - Manual (Page 113)

NDIR Gas Analyzer Specifications
Teledyne Analytical Instruments 97
Start-stop synchronization
ModbusTM protocol
Contents : Read/Write parameters
Read measurement conc. and
instrument status
Remark : When connecting via RS-232C
interface, an RS-232C ↔
RS485 converter should be
used.
Atmospheric Pressure Correction:
Measure atmospheric pressure and
calculate compensation (for use, exhaust
port of analyzer must be at atmospheric
pressure.
After atmospheric pressure correction:
Zero point: Not affected.
Span point: Change is 0.5% measured
value or less relative to a 1%
change in atmospheric
pressure.
Correction range: 700hPa-1050hPa