RKI Instruments HS-94 - Manual (Page 2)

INTRODUCTION
The RKI Models OX-94, CO-94, and HS-94 (the 94 series) are compact portable gas
detection instruments. They are designed to protect the worker from dangerous gas
levels, and are also intended to be used as survey tools to determine gas levels in a
workspace or other confined space. These instruments offer a full range of features,
including:
• Continuous detection of one of three hazards.
Oxygen Deficiency (OX-94)
Carbon Monoxide levels (CO-94)
Hydrogen Sulfide levels (HS-94)
• Large LCD readout with backlighting for dark areas and with easy to understand
symbols for Battery Condition, Peak Hold, STEL, and TWA.
• Loud audible alarm, directed upward for easier hearing.
• Intrinsically Safe design for Class I, Division 1, Groups A,B,C, and D hazardous
atmospheres.
• Microprocessor control for reliability, ease of use, and advanced capabilities.
• Small, lightweight design for user comfort.
WARNING
These instruments are designed to detect potentially life threatening gas levels.
Users must follow the instructions and warnings of this manual to assure proper
and safe operation of the instrument.
DESCRIPTION
The RKI Models OX-94, CO-94, and HS-94 are advanced portable instruments for
detection of either Oxygen Deficiency levels, Carbon Monoxide levels, or Hydrogen
Sulfide levels. Each instrument version is capable of detecting one type of gas. See Table
1 for the detection ranges. Gas detection features include audible alarm and blinking
display for dangerous gas concentrations, time weighted averaging for exposure to
toxic gases (CO or H2S), a Peak Hold function for toxic gases, and minimum hold
function for Oxygen detection.
2