CM4 Four-Point Continuous Monitor
CM4 Technical Manual
6-6
6.4.2 Display TWA
Purpose
The Current TWA display shows:
• Current TWA start time
• Current TWA end time
• Elapsed time
• Concentration levels for each point
Instructions
1. Press PROGRAM to exit Monitor Mode.
2. From the 2–REVIEW MENU, choose the subfunction
3–CURRENT TWA.
2 – REVIEW MODE
3 – CURRENT TWA
The display reads:
1 = DISPLAY 2 = PRINT
3. Press 1 to display the TWA information.
4. Press CURSOR ARROW LEFT/RIGHT to scroll forward/
backward to the next/previous display.
START 08/26/05 03:56
END 08/26/05 11:26
ELAPSED 07HRS 30MIN
The display shows, in sequence beginning at point 1, accumulated
concentrations for all four points.
Press RESET to return to the Review Menu.
6.5 Function 2.4 – Last Power-Down
Use the last power-down function to print and display the most recent
power-down and power-up date and time.
Purpose
Last power-down information which the CM4 prints and displays
includes:
• Instrument serial number
• Current date and time
• Date and time power was interrupted
• Date and time power was restored
6.5.1 Print Last Power-Down
See Figure 6-5 for an example of a typical last power-down function printout.
Instructions
1. Press PROGRAM to exit Monitor Mode.
2. From the 2–REVIEW MENU, choose the subfunction 4–LAST
POWER DOWN.
2 – REVIEW MODE
4 – LAST POWER DOWN
The display reads:
1 = DISPLAY 2 = PRINT
3. Press 2 to send the information to the printer.
CM4-851-0000
08/26/05 10:22
POWER INTERRUPTED
05/26/05 10:15
POWER RESTORED 06/01/05 07:30
Figure 6-5: Typical Last Power-Down Printout
The CM4 also prints this information when power is restored after a
power loss.
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