Table 1-1 Function Of Keys; Figure 1-3 7866 Digital Controller, Front View - Honeywell 7866 Operation And Maintenance Manual

ALM 1 or 2 indicated for Range 3 only
No other annunciators are used
Lower display – 8 characters
Normal operation – RANGE x (x = 1, 2, 3)
or the gas being measured
Configuration mode – Group or function
Key
• Places the controller in the Configuration Set Up group select mode. Sequentially displays Set
Setup Setup
Up groups and allows the FUNC key to display individual functions in each Set Up group.
• Used in conjunction with the SETUP key to select the individual functions of a selected
Func
Configuration Set Up group.
Loop 1/2
• Pressing this key saves, into nonvolatile memory, any changes made to previous function value
or selection.
• Used during field calibration procedure.
• Configuration Mode: Used to scroll through the parameter selections or to increase the selected
parameter value.*
• Configuration Mode: Used to scroll through the parameter selections or to decrease the selected
parameter value.*
* Changing Values Quickly: When changing the value of a parameter, you can adjust a more
significant digit in the upper display by holding in one key
at the same time. The adjustment will move one digit to the left. Press the key again and you will
move one more digit to the left. Holding the
quickly.
• Normal Operation: Used to toggle what is shown in the lower display—either the Range being
SP SP SP
measured or its corresponding Gas.
Select Select Select
• Normal Operation: Used to scroll through the lower display selections:
Lower Lower Lower
Display Display Display
• If Range was selected (by pressing SP SELECT), selections are RANGE 1, RANGE 2, or
RANGE 3.
• If Gas was selected (by pressing SP SELECT), selections are CO2inAIR, H2in CO2, H2in
AIR (corresponding to Range 1, Range 2, and Range 3 respectively).
•
Unused keys
Man Man Man
Auto Auto Auto
•
KEY ERR message will appear in lower display if one of these keys is pressed.
Run Run Run
Hold Hold Hold
9/06 7866 Triple Range Digital H
prompt

Figure 1-3 7866 Digital Controller, Front View

Table 1-1 Function of Keys

and CO Analyzer/Indicator - Operation and Maintenance
2 2
Upper display – 7 characters
Normal operation – 4 digit process
variable w/adjustable decimal point
Configuration mode – parameter values
or selection
Function
or , and pressing the other
or keys down will change the value twice as
Introduction
or
5