User Guide

Teledyne API M100E Analyzer Operation Manual Optional Hardware and Software
61
“Alarm 1” Relay
Alarm 1 which is “System OK 2” (system OK 1, is the status bit) is in the energized state when the
instrument is “OK” and there are no warnings. If there is a warning active or if the instrument is put into the
“DIAG” mode, Alarm 1 will change states. This alarm has “reverse logic” meaning that if you put a meter across
the Common and Normally Closed pins on the connector you will find that it is OPEN when the instrument is OK.
This is so that if the instrument should turn off or lose power, it will change states and you can record this with a
data logger or other recording device.
“Alarm 2” Relay and “Alarm 3” Relay
The “Alarm 2 Relay” on the rear panel, is associated with the “Concentration Alarm 1” set point in the
software and the “Alarm 3 Relay” on the rear panel is associated with the “Concentration Alarm 2” set point in the
software.
Alarm 2 Relay SO
2
Alarm 1 = xxx PPM
Alarm 3 Relay SO
2
Alarm 2 = xxx PPM
Alarm 2 Relay SO
2
Alarm 1 = xxx PPM
Alarm 3 Relay SO
2
Alarm 2 = xxx PPM
The Alarm 2 Relay will be turned on any time the concentration set-point is exceeded and will return to
its normal state when the concentration value returns below the concentration set-point.
Even though the relay on the rear panel is a NON-Latching alarm and resets when the concentration
goes back below the alarm set point, the warning on the front panel of the instrument will remain latched until it is
cleared. You can clear the warning on the front panel either manually by pressng the CLR button on the front
panel or remotely through the serial port.
The software for this instrument is flexible enough to allow you to configure the alarms so that you can
have two alarm levels for each gas.
SO
2
Alarm 1 = 20 PPM
SO
2
Alarm 2 = 100 PPM
SO
2
Alarm 1 = 20 PPM
SO
2
Alarm 2 = 100 PPM
In this example, SO
2
Alarm 1 and SO
2
Alarm 1 will both be associated with the “Alarm 2” relay on the rear panel.
This allows you do have multiple alarm levels for individual gasses.
A more likely configuration for this would be to put one gas on the “Alarm 1” relay and the other gas on the
“Alarm 2” relay.
SO
2
Alarm 1 = 20 PPM
SO
2
Alarm 2 = Disabled
SO
2
Alarm 1 = Disabled
SO
2
Alarm 2 = 100 PPM
“Alarm 4” Relay
This relay is connected to the “range bit”. If the instrument is configured for “Auto Range” and the
instrument goes up into the high range, it will turn this relay on.
5.8.3. RS-232 MULTIDROP (OPTION 62)
The multidrop option is used with RS-232 and utilizes both DB-9 connectors on the rear panel to enable
communications of up to eight analyzers with the host computer over a chain of RS-232 cables. It is subject to
the distance limitations of the RS-232 standard.
04515F DCN6048