Oxymitter 4000

Instruction Manual

IB-106-340 Rev. 3.0 December 2003

HEATER T/C

DIAGNOSTIC HEATER

ALARMS O2 CELL CALIBRATION

CALIBRATION RECOMMENDED

SW2

ON

o. Fault 15, Last Calibration Failed

Figure 8-17shows the electronic assembly

for an Oxymitter 4000 with a membrane

keypad (upper view) and an Oxymitter 4000

with an LOI (lower view).

Membrane Keypad. When Fault 15 is de-

tected, the CALIBRATION LED flashes

TEST

POINTS

INC INC

HIGH LOW

GAS GAS

DEC DEC

O2 CELL mV +

O2 CELL mv - HEATER T/C + HEATER T/C -

CAL

TEST GAS + PROCESS - % O2

TP1

J1

 

TP2

 

TP3

 

TP4

RED YEL GRN ORG

 

TP5

TP6

three times, pauses for three seconds, and

repeats.

1. The last calibration failed alarm acti-

vates when the slope and constant

values calculated are out of range and

the unit reverts to using the previous

calibration values.

2. The cell should be replaced. See para-

graph 9-4i,Cell Replacement, for cell

replacement instructions.

KEYPAD

Alarms

Calib Failed

LOI

37260033

Figure 8-17. Fault 15, Last Calibration Failed

LOI. When Fault 15 is detected, the LOI displays the “Calib Failed” message. Refer to the comments in paragraphs 1 and 2 above.

Rosemount Analytical Inc. A Division of Emerson Process Management

Troubleshooting 8-19