Compaq MTEK6000 user manual Low Pressure Alarm, Low Supply Volts Alarms, Low Temperature Alarm

MTEK6000 SERIES USER'S MANUAL

Low Pressure Alarm

If the gas pressure should fall below the Low Pressure Alarm Setpoint, a Low Pressure alarm will be initiated. The alarm will remain active until the pressure rises above the Low Pressure Reset parameter value. The setpoints are user configurable with default values of -100 and -80 respectively (see Appendix A for parameter addressing for your device).

Low Supply Volts Alarms

If the supply voltage to the unit falls below the Low Supply Volts Alarm Setpoint value, a Low Supply Volts alarm will be initiated. The alarm will remain active until the supply voltage is greater than the Low Supply Volts Alarm Reset parameter. The setpoints are user configurable with default values of 2.9 and 3.1 volts respectively for battery powered units (see Appendix A for parameter addressing for your device).

Low Temperature Alarm

If the gas flow temperature should fall below the Low Temperature Alarm Setpoint, a Low Temperature alarm will be initiated. The alarm will remain active until the temperature rises above the Low Temperature Reset parameter value. The setpoints are user configurable with default values of -100 and -80 respectively (see Appendix A for parameter addressing for your device).

Lost Differential Pressure Alarm (EFM)

A Lost Differential Pressure alarm is generated when the differential pressure circuitry is over-ranged. This can occur if the differential pressure transmitter is defective, or disconnected from the analog board causing differential pressure readings to be above or below the range of the transducer.

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Lost Pressure Alarm

A Lost Pressure alarm is generated when the pressure circuitry is over-ranged. This can occur if the pressure transducer is defective, or disconnected from the analog board causing pressure readings to be above or below the range of the transducer.

Lost Temperature Alarm

A Lost Temperature alarm is generated when the temperature circuitry is over- ranged. This can occur if the thermal (temperature) probe is defective, or disconnected from the analog board causing temperature readings to be above or below the range of the probe.

LowVolt Shutdown

On battery powered units, if the battery voltage decreases to approximately 2.8 volts, an interrupt will be triggered and the unit will enter Low Voltage (Critical) Shutdown mode. Low batt will be displayed on the display. This is an indication that the supply voltage is absolutely too low to operate the unit properly. The battery must be changed at this point or adequate supply voltage applied. For units that are externally powered, this point will occur when the input voltage drops to approximately 6.0 volts. In this mode, all operations cease, and the unit operates in a protective mode. The on-board battery will continue to protect the unit's memory; therefore data prior to entering this mode will be maintained. The supply voltage is monitored constantly and the unit will reset itself should the supply voltage become greater than 6.0 volts. If the unit is left alone without applying adequate supply voltage, the battery will continue to drain and the outside display will eventually go blank.

When sufficient supply voltage is applied and the unit powers-up, a LowVolt Shutdown alarm will be recorded.

January 2002