QUICK START. Sierra Monitor Corporation IT Series, 5100-02-IT

Model 5100-02-IT Combustible Gas Sensor Module

2. CAUTIONS & WARNINGS

2.1 INTRODUCTION

Although IT Transmitter Modules are designed and constructed for installation and operation in industrial applications including "hostile" environments, caution should be taken to insure that the installation is made in compliance with this instruction manual and that certain procedures and conditions are avoided. This chapter discusses the necessary cautions.

Read the entire chapter prior to installation of the equipment.

2.2 IT MODULES - GENERAL

Avoid installing sensor modules where they will be unnecessarily exposed to wind, dust, water (esp. direct hose down), shock, or vibration. Observe temperature range limitations.

Sensors may be adversely affected by prolonged exposure to certain materials. Loss of sensitivity, or corrosion, may be gradual if such materials are present in low concentrations. These materials include: silicones, sulfides, Halides (compounds containing chlorine, fluorine, bromine, iodine), acid vapors, caustic liquids or mists.

Care has been taken by the manufacturer to ship your modules in protective packaging to avoid contamination prior to installation. It is recommended that the modules remain protected during installation and that the covering be removed immediately prior to system start-up.

During normal use the sensor is protected from dirt and oil contamination by a sintered metal cover. If this cover becomes clogged, the response of the sensor will be reduced. Protect the sensor from contamination by careful placement, or by use of rain and dust shields.

Sensor modules must not be painted. Paint may contain compounds which will contaminate the sensor. Paint will cause clogging of the sintered metal cover and will cause difficulties during attachment of the calibration head or other maintenance activity. It is recommended that the module be tagged

"DO NOT PAINT"

.

2.3 WIRING

The manufacturer recommends that extra caution be taken where the installation is near any sources of electromagnetic or radio frequency interference. Precautions include:

• Avoid running sensor module cable close to high power cables, radio transmission lines, or cables subject to pulses of high current.

• Avoid running cables near large electric motors or generators.

• Unit is shipped with RF filter that is clipped onto the sensor assembly connector.

• When shielding is used, it is recommended that shields be grounded at the controller and nowhere else.

• All splices must be via either a termination hardware system or soldered. Improperly spliced cable can result in corrosion, resistance changes and system errors. The use of wire nuts and crimp-on connectors is unacceptable.

NOTE

Installation and wiring must be in accordance with the National Electrical Code.

AC Voltage conductors are not to be run in the same conduit as DC voltage conductors.

2.3.1 CATALYTIC BEAD SENSOR MODULES

Model 5100-02-IT Gas Sensor Modules are FM performance approved for detection of Combustible gas

(methane and hydrogen). The sensor is cross sensitive to the combustible gases indicated in Table 2-1.

Risk management planning should take into consideration the potential for the presence of other gases in the monitored area.

Page: 7