Broadley Technologies 14 Manual de instrucciones descargar pdf (Pagina 46)

Model 14 Oxygen Analyzer

Chapter 7:

Start-up and Troubleshooting

7.1 Start-up

7.1.1 Probe Connection

See page 3-3 for the terminal connection.

7.1.2 Main Power Supply Connection

Remove aluminum plate inside the Model 14. Power

should be connected to the “Mains” terminal indicated

on the plate. See Page 3-3 for terminal connections.

7.1.3 Starting the Analyzer

When switched on, the analyzer performs an automatic

test of its electronics and displays a first value. Wait

until the measurement has stabilized (max. 30 min).

Do not calibrate the analyzer before the temperature

and the concentration are stable. (See Chapter 6.)

Note 1: Never shake the probe during a calibration, it

may provoke an introduction of oxygen in the elec-

trolyte and temporarily increase the cell current.

7.2 Functional Troubleshooting

Causes and solutions:

A) There is an electrolyte leak (through the mem-

brane). The current is too high because of an exces-

sive penetration of oxygen.

➯ Change the membrane.

B) The electrolyte is contaminated.

➯ Change the electrolyte.

Causes and solutions:

A) The membrane has been torn.

➯ Change the membrane.

B) Cable or connections have been damaged.

➯ Check the connection to the transmitter. If

the connection is correct check the connections

of the probe connector.

Causes and solutions:

A) There is humidity or water in the probe connector.

➯ Dry the connector. Check connections.

B) Incorrect connection.

➯ Check the connections of the transmitter to

the probe.

C) Electromagnetic interferences close to the probe

or transmitter cable.

➯ Find a better place for the cable and check

the EMC level.

7-1

PROBLEM: Excessive time for stabilization

or no stabilization during air calibration.

PROBLEM: Significant instability in

measuring mode

PROBLEM: No significant current increase

when the probe is in the air during

calibration

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