Armstrong Monitoring Corporation AMC-310 Gebruiksaanwijzing - Pagina 16
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display this setting can be adjusted by using a meter connected to the output. In this calibration
mode the analog output is 10,000 ppm at full scale (i.e. 10.0 volts or 20.0 mA). If the voltage
output is selected, this scaling corresponds to 1ppm per millivolt or 1 volt per 1000 ppm.
The setpoint is adjusted with the 'UP' and 'DOWN' buttons while JP3 is closed. When JP3 is
opened, the new relay setpoint takes effect and is stored in non-volatile memory. The setpoint
hysteresis is approximately 40 ppm.
6.3 Optional High Limit Contact
The high CO
limit option provides a dry (i.e. unpowered) contact closure that activates when
2
the detected concentration rises above the high CO
full scale of the unit.
6.3.1 Setting High Limit Contact Polarity
The polarity of the high limit contact is set with jumper JP5 as shown in the table below.
To open jumper JP5 remove the shorting block from the two pins, and replace it so that it
engages only a single pin of the jumper. The shorting block should not be removed; it is
required during the calibration procedure.
AMC-310 AirSense Infrared CO
Jumper JP5
OPEN
CLOSED
(factory default)
Analyzer
2
limit. The high limit is adjustable from 0 to
2
Relay Operation
normally closed
opens above setpoint
normally open
closes above setpoint
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