Basic Conditions For The Eo - Emerson ROSEMOUNT Analytical NGA 2000 Instruction Manual

NGA 2000 MLT Hardware
CHECK AND REPLACEMENT OF ELECTROCHEMICAL OXYGEN SENSOR
BASIC CONDITIONS FOR EO
18.3.4

Basic conditions for the EO

Admit ambient air for the analyzer (approx. 21 Vol. - O
Connect the DVM to the measuring points
Tp 1 (Signal) and Tp 2 ( ⊥ ⊥ ⊥ ⊥ ⊥ ) of the PCB OXS, mounted directly at the sensor block
(Fig. 18-1, see also Fig. 18-2, 1-3, 1-16a and 1-17).
Set the signal to 1000 mV DC (± 5 mV) with potentiometer R4 (Fig. 18-3) of the
corresponding circuit board "OXS".
Note !
It is not allowed to change this setting for this sensor again !
Switch off the analyzer and close the analyzer housing (see 15.).
Built-in the module into platform if necessary.
A complete re-calibration of the instrument must be performed after a sensor - replacement.
18 - 6
-SENSOR
2
Tp 1
Potentiometer "R4"
Fig. 18-3: PCB "OXS", assembled, horizontal projection
-Sensor
2
) and switch on (see Section 6.).
2
Tp 2
Connection
oxygen sensor
("P2")
Instruction Manual
90002929
Emerson Process Management GmbH & Co. OHG
07/2006