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Emerson Process Management GmbH & Co. OHG 7-49
X-STREAM XE
Instruction Manual
HASXEE-IM-HS
10/2010
7
Maintenance & Procedures
7.5 Replacing the Electrochemical Sensor
7.5.5 Adjusting the Output Signal
Strip P3 for sensor connection
Potentiometer R4
Tp 1
Tp 2
Fig. 7-14: OXS Board, Top View
Procedure:
• power on the open instrument.
• Supply ambient air (approx. 21 % O
2
)
• Connect a digital voltmeter (DVM) to
Tp 1 (signal) and Tp 2 (GND) on the elec-
tronics board OXS (g. 7-14).
• Adjust the measured signal to 3360 mV DC
(± 5 mV) utilizing the potentiometer R4 on
OXS board.
Having replaced the worn sensor, the board´s
output signal requires some adjustment.
Note!
Once the output signal has been adjusted for
a specic sensor, changing the potentiome-
ter settings will cause incorrect measuring
results!
ELECTRICAL SHOCK HAZARD
Working at open and powered instruments means working near live parts
and is subject to instructed and trained personnel only!