Operator Manual

748223-K June 2002

Model 7003M

4-4 DIAGNOSTICS MODE

Refer to Figure 4-2 on page 4-7, Table 4-7 on page 4-6 and Table 4-8 below. The DIAGNOSTICS mode is used to:

•Check sensor circuit voltages

•Check relays

•Adjust the output current

Enter DIAGNOSTICS Mode

If the instrument is already in HOLD mode, skip step 1 and proceed to step 2.

1.From the RUN mode, press the UP ARROW and DOWN ARROW at the same time to enter the HOLD mode.

2.If the security is activated, enter the security identification (id) code and press ENTER to continue.

Hld, YES, flash briefly, then Hld flashes alternately with the last oxygen reading. The output signal will remain unchanged until the instrument returns to the RUN mode.

a.Raw Sensor Voltage

1.Press DISPLAY and ACK at the same time to enter DIAGNOSTICS mode.

Tst, d-3, d-4 flash briefly, then the %O2 caret lights and the raw sensor voltage is displayed.

2.Press ENTER at any time to return to HOLD mode. Press ENTER again to return to RUN mode.

 

KEY

DISPLAY

WHAT HAPPENS

 

DISPLAY

"2.13"

Scrolls among the DIAGNOSTIC displays

 

ACK

Nothing

Nothing

 

ALARM 1

"A-1" "On"/ "OFF"

Toggles the Alarm 1 relay ON/OFF

 

ALARM 2

"A-2" "On" / "OFF"

Toggles the Alarm 2 relay ON/OFF

 

UP ARROW

"2.13" →"2.14"

Increases current output or span setting

 

DOWN ARROW

"2.14" →"2.13"

Decreases current output or span setting

 

CAL

Nothing

Nothing

 

ENTER

"hLd"

Drops back to HOLD mode

 

 

Table 4-8. DIAGNOSTICS Mode Key Functions

b. Test Current Output

c. Linearizing Current Output

The current output can be tested (increased or decreased using the ARROW keys) and the actual output will change. When the instrument returns to the RUN mode, the output will return to the previous value.

1.Press DISPLAY until the minus sign (- ) is displayed on left.

2.Use the ARROW keys to increase or decrease the current output.

For some samples, current output does not track the oxygen reading displayed. The operator can linearize output and store the compensating second-order polynomials in EEPROM. This data will remain and function there as long as the EEPROM is not erased. However, if a "cold boot" is performed, the operator must repeat this linearization routine.

4-8 Calibration and Adjustments

Rosemount Analytical Inc. A Division of Emerson Process Management