CM4 Four-Point Continuous Monitor
CM4 Technical Manual
7-3
The following is an overview of each of the seven functions. The
following sections describe each of these functions in detail:
• 3.1 POINT ENABLE disables points not needed (see Section
7.2)
• 3.2 POINT PARAMETERS
configures points, selects gas type,
alarm level, and 20 mA full scale, as well as assigns each point
an identification (see Section 7.3)
• 3.3 OUTPUT OPTIONS enables the Printer and COM outputs
and defines data format between data transmissions and
determines relay state and 2mA fault operational status (see
)
• 3.4 CONFIGURATION saves a new instrument configuration
or restores a previously saved instrument configuration (see
)
• 3.5 DATE & TIME controls several date and time functions
• 3.6 ACCESS KEYLOCK locks the keypad from unauthorized
access when in Monitor Mode (see
)
• 3.7 MAINT. SET-UP enables and disables the Chemcassette
®
and internal/external filter counters (see
). See
to reset Chemcassette
®
and filter counters.
7.2 Function 3.1 – Point Enable
Purpose
Use the Point Enable function to disable points not needed.
Instructions
1. Press PROGRAM to exit Monitor Mode.
2. From the 3–SET-UP MENU, choose the subfunction 1–POINT
ENABLE.
The display reads:
SELECT POINT
3. Select Point 1.
The display reads:
PT1 ENABLE 1=Y 0=N
4. Enter your selection, “1” or “0”.
The display returns to:
SELECT POINT
5. Press RESET to return to the Set-Up Menu.
NOTE:
Disabling a point will not activate any alarm or set any output
concentrations for that point.
7.3 Function 3.2 – Point Parameters
Purpose
Use the Point Parameters function to:
• Specify gases for monitoring
• Set alarm levels and current loop Full Scale (FS) value for
each point
• Assign point identification strings
7.3.1 Select Gas Type, Program Alarms and Set
Current Loop Full Scale Values
Instructions
1. Press PROGRAM to exit Monitor Mode.
2. From the 3–SET-UP MENU, choose subfunction 2–POINT
PARAMETERS.
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