Halogen Safe Entry Monitor

The Bacharach Halogen Safe Entry Monitor (hereafter referred to as the H-SEM unit) is a portable refrigerant gas monitor with a self contained purge-air supply. The H-SEM unit is designed to test an area for a specific refrigerant gas for the purpose of determining the presence and level of that gas in the area being tested.

The self contained purge-air supply allows an area to be tested for up to 40 minutes without needing to take the monitor to an area of fresh air for zeroing purposes. The monitor self-zeros every 4 minutes to ensure accurate gas measurements.

During normal operation the H-SEM unit displays the type of gas being monitored, along with displaying both the current gas level and the peak gas level detected in that area on its front panel LCD. The monitor retains a log of previous readings that can be easily accessed at a later time for analysis.

Front panel indicators and an audible alarm are provided to signal gas alarm and instrument fault conditions. The audible alarm can temporarily be silenced by a push of a button, but will reactivate if the gas level is still above the alarm trip point after a user defined time period has elapsed.

The H-SEM unit requires only minor periodic maintenance such as the occasional replacement of filters. The monitor incorporates active diagnostics that continuously check the system for proper operation. A front panel indicator is provided to alert an operator of system malfunctions, and fault codes are generated that enable the operator to identify the cause of the fault.