I
NITIAL
S
TARTUP AND
C
ALIBRATION
3-6
October 1999 Rosemount Analytical 748250-L
Model 880A Non-Dispersive Infrared Analyzer
3.4 ACCESSING MODE DISPLAYS
Ensure that all MODE displays are functional and that all options ordered from the
factory are present by following the flow chart in Figure 3-4. To follow the logic flow
chart, use the following steps:
Note:
For more detailed instructions, refer to Figures 3-5 through 3-8, 3-11, and 3-13
through 3-15.
1. Press MODE.
2. Use the
→
key to move to the desired sub-menu (SECURITY, RANGE, DIAG-
NOSTICS, LINEARIZER, ALARM, CUR-RENT OUTPUT, AUTO-CAL or REMOTE
I/O) and press ENTER.
3. Press SHIFT then
→
to move through each sub-menu.
4. At the end of each routine, press SHIFT/ENTER to return to the RUN mode.
5. Repeat steps 1 through 4 to check the next function.
3.5 SECURITY CODE
See Figure 3-5. The Model 880A is equipped with a security code feature, which is
deactivated when the instrument is shipped from the factory. When the security
feature is activated, only the STATUS and MODE function keys are active to access
the STATUS and SECURITY displays. A valid password must be entered to activate
the rest of the keyboard.
This password may be changed to any three character group. Entering the correct password
activates the keyboard.
To gain access, follow the steps in the appropriate figure in this section. Once access has
been gained, the procedure described in Figure 3-5 may be performed.
In the event the password is misplaced, the operator may return to the initial password (880)
through the following steps:
1. Press and release the RESET push-button switch on the Micro Board (see Figure 3-1).
2. Press and hold the ENTER key until the RUN mode display appears.
INITIAL PASSWORD IS “880”
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