CM4 Four-Point Continuous Monitor
The pyrolyzer operates at a very high temperature. Before performing
any service on the instrument, always wait 30 minutes after switching
off power to allow the pyrolyzer to cool.
4.2.1 Exiting Monitor Mode
To exit Monitor Mode:
1. Press PROGRAM from Monitor Mode. The CM4 displays:
END MONITOR? 1=Y 0=N
2. Press 1 within two seconds to end monitoring. If the printer
option is available, the display reads:
3. Press 1 to print TWA information. Entering 0 exits without
printing TWA information.
After selecting 1, the display advances to:
CM4 Technical Manual
4.2.2 Printing Time Weighted Averages (TWA)
During Monitor Mode
If the printer option is installed, press MONITOR twice to print TWAs
while in Monitor Mode. The CM4 prints the current TWA information.
If there is no printer option installed, TWAs can be displayed. Refer
4.2.3 Point Lock-On During Monitor Mode
The Point Lock-On feature causes the CM4 to optimize tape advance
timing of the most rapid updating of concentration on one point.
Monitoring ceases on the other points, and the display locks-on to the
one selected point. To enable a specific point:
1. Press MONITOR.
2. Press 1, 2, 3, or 4 to select the specific point.
The CM4 disables the remaining points. The Status LED for the
selected point flashes green. All other point status LEDs are off.
To re-enable disabled points, either:
1. Exit Monitor Mode and then reenter.
2. Press MONITOR, then 0.
If a point inadvertently remains locked on, a fault triggers after the
user defined idle time (see
fault displays at the end of each point display cycle:
F28 PT LOCK-ON TIMEOUT
Press RESET to clear the fault.
7.6.5) has elapsed. The following