N
2
O Portable Monitor
Introduction
Instruction 3015-4787
3
1.7 Shipping Precaution
When shipping the instrument by air, deflate the purge-air bag to prevent it from bursting due to changes
in air pressure. Deflate the bag by selecting the
EMTYBAG
function as described on page 11.
1.8 Features and Capabilities
•
Detects, measures, and displays the level of N
2
O gas in the area being monitored
•
Measurement range of 0–1,000 ppm with a resolution of 1 ppm
•
Self contained purge-air bag, allowing the monitor to be used in a contaminated atmosphere
•
Automatically logs up to 200 gas readings that can be printed / plotted for analysis
•
Eliminates false alarms with use of non-dispersive IR source and sample draw system
•
Visual and audible gas alarm indictors that are turned ON when the detected gas level exceeds
a user defined trip-point
•
Extensive self diagnostics, providing both visual and audible indications when a fault occurs
•
Battery powered, providing 8–12 hours of operation
1.9 Functional Overview
The Bacharach Nitrous Oxide (N
2
O) Portable Monitor is designed to detect, measure, and display the
concentration of N
2
O gas in the area being monitored. To ensure accurate gas measurements, the monitor
self-zeros every 4 minutes using its internal supply of fresh air.
During normal operation the N
2
O Monitor displays both the current gas level and the peak gas level
detected 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 N
2
O Monitor 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 quickly identify the cause of the fault.
