Physical Zero Alignment; Ir Measurement; Paramagnetic Oxygen Measurement; Electrochemical Oxygen Measurement (Eo2) - Emerson ROSEMOUNT Analytical NGA 2000 Instruction Manual

Instruction Manual
90002929
07/2006
11.1.6

Physical Zero Alignment

For physical zero adjustment the raw signal of respective measuring channel is set to ± 100.000
counts while purging instrument with zero gas.
The raw measuring values can be shown by pressing "Status" (F2)
11.1.6.1

IR Measurement

For set of physical zero adjustment see Item 17.5 please.
11.1.6.2

Paramagnetic Oxygen Measurement

Set physical zero adjustment by alteration the position of photodiode of the sensor.
A further test is to measure the output voltage of the sensor while purging with test gas.
Test point:
Signal:
11.1.6.3 Electrochemical Oxygen Measurement (EO
For set / check of sensor see Item 18.2 and 18.3.4 please.
Emerson Process Management GmbH & Co. OHG
"Pin 2" of P23 of PCB "PIC" (Fig. 1-32, too)
≈ + 4 V dc
(purging with test gas 25 Vol.-% / 100 Vol.-% oxygen (O
on installed sensor)
NGA 2000 MLT Hardware
TEST PROCEDURE / TEST POINTS
PHYSICAL ZERO ALIGNMENT
"RawMeas." (F2).
)
2
not used
5 (+ 6,3 V dc)
4
3 (- 6,3 V dc)
2 (signal)
1 ( )
not used
), depending
2
11 - 5