Emerson 3081FG - Manual (Page 53)

Instruction Manual
IB-106-3081 Rev. 1.5
September 2002
Rosemount Analytical Inc. A Division of Emerson Process Management HART/AMS 4-7
Model 3081FG
4-6 HART COMMUNICATOR START CAL-
CHECK METHOD
To perform a calibration check on the Two-Wire
In Situ Oxygen Analyzer with the HART Com-
municator, use the following procedure. If nec-
essary, use the menu tree in Figure 4-3 (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 ar-
row key or use the number keypad to
select the menu item number.
To return to a preceding menu, press
the left arrow key.
NOTE
Pressing ABORT at any time during
this process will purge the calibration
check gases and end the calibration
check procedure.
a. From the DEVICE SETUP SCREEN, se-
lect DIAG/SERVICE.
b. From the DIAG/SERVICE screen, select O
2
CALCHECK.
c. Before starting the calibration check proce-
dure, first set up the high calibration check
gas, low calibration check gas, and tracking
using HART/AMS.
d. From the O
2
CALCHECK screen, select
menu item 1, START CALCHECK, to ac-
cess the calibration check procedure.
Failure to remove the analyzer from
automatic control loops prior to per-
forming this procedure may result in a
dangerous operating condition.
e. In the first screen, a “Loop should be re-
moved from automatic control” warning ap-
pears. Remove the analyzer from any
automatic control loops to avoid undesirable
equipment performance and press OK.
f. The next screen prompts you to apply the
high calibration check gas. This message
will only display for approximately three
seconds. Press OK.
g. At this point, calibration check gas will flow
for approximately three minutes until the
gas reading is taken. Once the gas is
measured, the message, “Hi gas reading
taken,” displays for three seconds.
h. Next, the screen prompts you to apply the
low calibration check gas. Press OK.
i. The low calibration check gas will flow for
approximately three minutes until the read-
ing is taken. Once the gas is measured, the
message, “Low gas reading taken,” displays
for three seconds.
j. Next, the screen prompts you to disconnect
the calibration check gases. Press OK.
Once the gases are disconnected, the sys-
tem will purge the gases for approximately
three minutes.
k. When the “Loop may be returned to auto-
matic control” note appears, return the ana-
lyzer to the automatic control loops
previously removed and press OK.
4