Sierra FLAT-TRAKTM 780S - Manual (Page 5)

Series 780S Instruction Manual Table of Contents
IM-78S-B 0-5
Warnings and Cautions
Warning! Agency approval for hazardous location installations varies between flow
meter models. Consult the flow meter nameplate for specific flow meter approvals be-
fore any hazardous location installation.
Warning! All wiring procedures must be performed with the power off.
Warning! To avoid potential electric shock, follow National Electric Code safety practices
or your local code when wiring this unit to a power source and to peripheral devices. Fail-
ure to do so could result in injury or death. All AC power connections must be in accor-
dance with published CE directives.
Warning! Do not power the flow meter with the sensor jumper wires disconnected. This
could cause over-heating of the sensors and/or damage to the electronics.
Warning! Before attempting any flow meter repair, verify that the line is de-pressurized.
Warning! Always remove main power before disassembling any part of the mass flow meter.
Caution! Changing the length of cables or interchanging sensors or sensor wiring
will affect the accuracy of the flow meter. You cannot add or subtract wire length with-
out returning the meter to the factory for re-calibration.
Caution! When using toxic or corrosive gases, purge the line with inert gas for a
minimum of four hours at full gas flow before installing the meter.
Caution! The AC wire insulation temperature rating must meet or exceed 71°C (158°F).
Caution! Before making adjustments to the Smart Electronics device, verify the flow meter
is not actively monitoring or reporting to any master control system. Adjustments to the
electronics will cause direct changes to flow control settings.
Caution! Printed circuit boards are sensitive to electrostatic discharge. To avoid
damaging the board, follow these precautions to minimize the risk of damage:
• before handling the assembly, discharge your body by touching a grounded,
metal object
• handle all cards by their edges unless otherwise required
• when possible, use grounded electrostatic discharge wrist straps when handling
sensitive components