Emerson Process Management IB106-340 instruction manual Operation, Overview

Oxymitter 4000

Instruction Manual

IB-106-340 Rev. 2.4 April, 2001

SECTION 4 OPERATION

4-1 GENERAL

a.Overview

Ensure the Oxymitter 4000 is at normal op- eration. The diagnostic LEDs will display the operating cycle. All other LEDs should be off (Figure 4-1).

1.DIAGNOSTIC ALARM LEDS. If there is an error in the system, one of these LEDs will flash various blink codes (Section 7, TROUBLESHOOTING). In the case of multiple errors, only one will be displayed based on a priority system. Correct the problem and cycle power. The operating display will return or the next error will be displayed. The alarms are:

HEATER T/C HEATER

O2 CELL CALIBRATION

2.CALIBRATION RECOMMENDED LED. Turns on when the system de- termines a calibration is recommended.

3.TEST POINTS. Test points 1 through 6 will allow you to monitor with a mul- timeter: the heater thermocouple, O2 cell millivolt, and the process O2.

(a)TP1 and TP2 monitor the oxygen cell millivolt output which equates to the percentage of oxygen present.

(b)TP3 and TP4 monitor the heater thermocouple.

(c)TP5 and TP6 monitor the process gas or the calibration gas parameter.

4.CAL LED. The CAL LED is on steady or flashing during calibration. Further information is available in Section 6,

MAINTENANCE AND SERVICE.

5.Keys.

(a) INC and DEC. The INC and DEC
keys are used to set the values of
the calibration gases. Attach a
multimeter across TP5 and TP6.
The calibration and process gases	4

can now be monitored. Pressing the INC or DEC once will cause the output to switch from the proc- ess gas to the calibration gas. Pressing INC or DEC a second time will increase or decrease the calibration gas parameter. If the keys have been inactive for one minute, the output reverts to the process gas. When a calibration has been initiated, the value at TP5 and TP6 is the % O2 seen by the cell. Oxygen levels, as seen on the multimeter, are:

8.0% O2 = 8.0 volts DC

0.4% O2 = 0.4 volts DC

(b)CAL. The CAL key can: 1 Initiate a calibration.

2 Sequence through calibration.

3 Abort the calibration.

b.Model 751 Remote Powered Loop LCD Display (Optional)

Refer to Remote Powered Loop LCD man- ual for calibration and operation.

Rosemount Analytical Inc. A Division of Emerson Process Management Operation 4-1