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Controller Display
The Model 2850 default normal operation screen is shown in Figure 6. The first three
lines of the display are fully user programmable. Live moisture concentration and
system values such as cell temperature, pressure, and flow rate may be displayed. The
fourth line displays system messages and alarm/error information only. Refer to (Chap-
ter 5): Display Flags and Labels for more information on changing the format of the
controller display.
Held Moisture (Display Flag = 1)
Cell Oven Temperature (Display Flag = 11)
System Message/Alarm
Figure 6.
Typical normal operation
screen.
System Security and Access Codes
The Model 2850 has four system security levels, Levels 0 through 3. An access code must
be entered before certain menus and system values can be accessed. Factory default ac-
cess codes are listed in (Chapter 4), which may be removed from this manual at the user's
discretion. Level 1 and 2 default access codes can be altered or eliminated by changing
the software configuration. Refer to (Chapter 5): Passwords for more information on
altering system security. Note that higher levels access codes can access any lower level
function.
Level 0 Security (Operator Level)
No access code is required for the following functions:
CONTROLLER FUNCTIONS
1 . 0 0 ppm Vol H2 O
60 . 0 0 Deg ree C ent
0 0 1 9 -Smpl 0 8 : 0 0 -C al
Sample Flow ing
Note that system message will vary.
•
Initiate a zero cycle with NO coefficient D adjustment
•
Initiate an auto-calibration cycle with NO span adjustment
•
View upper and lower levels for concentration alarm
•
View upper and lower range limits for 4 to 20 mA analog outputs 1 and 2
•
Manually select high or low range setting for analog output 1
Countdown for Current Measurement
Period and Time of day for or interval in
seconds between auto-calibration cycles
(Display Flag = 15)
Controller Function 4-1
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