Instruction Manual

IB-106-340 Rev. 3.0 December 2003

Oxymitter 4000

1. DIAGNOSTIC ALARM LEDS. If there

is an error in the system, one of these

LEDs will flash various blink codes

(Section 8, TROUBLESHOOTING). In

DIAGNOSTIC

LEDS

MEMBRANE

the case of multiple errors, only one

KEYS

HEATER T/C

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 pa- rameter.

4.CAL LED. The CAL LED is on steady or flashing during calibration. Further information is available in Section 9,

MAINTENANCE AND SERVICE.

DIAGNOSTIC HEATER

ALARMS 02 CELL

CALIBRATION

CALIBRATION RECOMMENDED

 

 

02 CELL mV +

TEST

02 CELL mv -

POINTS

HEATER T/C +

 

 

HEATER T/C -

INC

INC

CAL

 

 

HIGH

LOW

 

GAS

GAS

 

DEC

DEC

TEST GAS +

PROCESS -

 

 

 

 

% 02

MEMBRANE

KEY

MEMBRANE

KEYS

22220023

Figure 5-2. Calibration Keys

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:

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 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

1Initiate a calibration.

2Sequence through calibration.

3Abort the calibration.

NOTE

Refer Section 9, MAINTENANCE AND SERVICE, for calibration instructions.b.Model 751 Remote Powered Loop LCD Display (Optional)

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

5-2 Startup and Operation with Keypad

Rosemount Analytical Inc. A Division of Emerson Process Management