Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 56)

IM 11M13A01-04E 4-6
Piping Diagram
Piping Diagram of Auto Calibration Unit
SPAN IN
REF. IN
ZERO IN
F4.11E.EPS
Calibration gas
Reference gas
ZR202S body
Span-gas
solenoid valve
Span-gas flowmeter
Reference-gas flowmeter
To Air set
To Zero-gas cylinder
Needle valve
Autocalibration unit
Zero-gas flowmeter
Zero-gas
solenoid valve
Check valve
Ensure that the furnace gas does not flow into the probe.