Instruction Manual

IB-106-340 Rev. 3.0 December 2003

Oxymitter 4000

7-7 HART COMMUNICATOR MANUAL O2 CAL METHOD

To perform a calibration using the HART Com- municator, use the following procedure. If nec- essary, use the menu tree in Figure 7-3(sheet 1 of 3) for reference.

NOTE

To select a menu item, either use the up and down arrow keys to scroll to the menu item and press the right arrow key or use the number keypad to select the menu item number. To return to a preceding menu, press the left arrow key.

a.From the PERFORM O2 CAL screen, select menu item 1, O2 CAL, to access the O2 cali- bration procedure.

Failure to remove the Oxymitter 4000 from automatic control loops prior to performing this procedure may result in a dangerous operating condition.

b.In the first O2 CAL screen, a “Loop should be removed from automatic control” warning ap- pears. Remove the Oxymitter 4000 from any automatic control loops to avoid a potentially dangerous operating condition and press OK.

c.The next several screens indicate the calibra- tion status. At each of the following status prompts, select menu item 2, NEXT CAL STEP:

COMPLETE

CAL RECOMMENDED APPLY GAS 1

GAS 1 FLOW

d.At this point, select menu item 4, EXIT, to leave the O2 CAL procedure.

e.From the PERFORM O2 CAL screen, view menu item 3, CALSTATE, to monitor the

calibration status as it updates. Or, access the O2 CALIBRATE screen and select menu item 2, O2 CAL STATUS, to view menu item 1, CALSTATE; menu item 2, TIMEREMAIN; and menu item 3, PRESENT O2, as the calibration status updates.

f.When CALSTATE displays APPLY GAS 2, return to the O2 CAL procedure.

g.When the “Loop should be removed from automatic control” warning appears, press OK.

h.At the APPLY GAS 2 status prompt, select menu item 2, NEXT CAL STEP. When the status displays GAS 2 FLOW, select menu item 4, EXIT, to leave the O2 CAL procedure.

i.From the PERFORM O2 CAL screen, view menu item 3, CALSTATE, to monitor the cali- bration status as it updates. Or, access the

O2 CALIBRATE screen and select menu item 2, O2 CAL STATUS, to view menu item 1, CALSTATE; menu item 2, TIMEREMAIN; and menu item 3, PRESENT O2, as the cali- bration status updates.

j.When CALSTATE displays STOP GAS, re- turn to the O2 CAL procedure.

k.When the “Loop should be returned to auto- matic control” message appears, return the Oxymitter 4000 to the automatic control loops previously removed and press OK.

l.At the STOP GAS status prompt, select menu item 2, NEXT CAL STEP. When the status displays PURGING, select menu item 4, EXIT, to leave the O2 CAL procedure.

m.From the PERFORM O2 CAL screen, view menu item 3, CALSTATE, to monitor the cali- bration status as it updates. Or, access the

O2 CALIBRATE screen and select menu item 2, O2 CAL STATUS, to view menu item 1, CALSTATE; menu item 2, TIMEREMAIN; and menu item 3, PRESENT O2, as the cali- bration status updates.

n.When CALSTATE displays COMPLETE, the calibration is finished.

7-6 HART/AMS

Rosemount Analytical Inc. A Division of Emerson Process Management