RKI Instruments RI-215A - Manual (Page 5)

RI-215A Operator’s Manual Overview • 5
Chapter 1: Introduction
Overview
This chapter briefly describes the RI-215A. This chapter also describes the RI-215A
Operator’s Manual (this document). Table 1 at the end of this chapter lists the specifications
for the RI-215A.
About the RI-215A
The RI-215A Air Quality Monitor detects the presence of CO
2
(carbon dioxide) using an
infrared (IR) gas sensor. The RI-215A shows increasing levels of CO
2
on its liquid crystal
display (LCD). It also displays a visual alarm should levels of CO
2
exceed the unit’s full
scale (e.g., 2,000 ppm). Alarm contacts on the RI-215A are also provided, which enable
you to connect an external alarm to the unit.
Three ranges of gas detection are available for the RI-215A: 0 - 2,000 ppm, 0 - 5,000 ppm,
and 0 - 9990 ppm. Detection ranges are set at the factory. When you ordered the RI-215A,
you should have specified one of these gas detection ranges for your unit. It becomes
necessary to change the detection range, See “Appendix A: Changing the Detection
Range” on page 24.
The RI-215A operates in three modes: Measuring Mode, Maintenance Mode, and Alarm
Adjust Mode.
Measuring Mode
Measuring Mode is the mode in which the RI-215A detects, measures, and displays CO
2
(normal operation).
Maintenance Mode
Maintenance Mode allows you to perform maintenance tasks. These tasks include:
• adjusting the zero setting
• adjusting the span setting
• changing the detection range
CAUTION: The RI-215A is not in operate as a gas monitor when you are in Maintenance Mode.
Alarm Adjust Mode
Alarm Adjust Mode allows you to verify and change the alarm point.