Yokogawa Extractive Oxygen Gas Analyzer TDLS220 User Manual
Page 4
IM 11Y01B02-01E-A 4th Edition September 11, 2012-00
SAFETY should be considered first and foremost importance when working on the equipment described in this manual. All persons using this
manual in conjunction with the equipment must evaluate all aspects of the task for potential risks, hazards and dangerous situations that may
exist or potentially exist. Please take appropriate action to prevent ALL POTENTIAL ACCIDENTS.
1) Safe lifting and carrying
If it is necessary to relocate the analyzer, it should be lifted by at least two people wearing protective gloves and steel toe boots.
The analyzer should be always transported either in a vertical position as shown in the picture, or in a horizontal position with the mounting plate
facing down. If transported horizontally, it must be held by the mounting plate only. In vertical position, it is acceptable to hold the analyzer by the
elements in the “grip” area. Never hold the analyzer by applying force to the elements in the “Do not grip” zone or to the conecting cables and
tubes. If a winch or another hoisting device is used, it can be hooked to the upper mounting holes.
2) Electrical hazard
The areas of potentially hazardous voltage are labeled with this sign:
The analyzer is powered by either a ~220V, 50 Hz or ~120V, 60 Hz (model specific). During normal operation this voltage is not accessible from
outside of the enclosure. However, end user is responsible for connecting the mains to the analyzer terminals in the Power/Temperature Controller
box (right bottom block in the diagram above).
THE WIRES BEING CONNECTED MUST BE DISCONNECTED FROM ANY VOLTAGE SOURCES DURING THIS PROCEDURE.
PROTECTIVE GROUND WIRE MUST BE CONNECTED TO THE DESIGNATED TERMINAL LABELED BY THE CORRESPONDING SYMBOL.
DO NOT OPEN THE POWER MODULE ENCLOSURE WHEN THE ANALYZER IS ENERGIZED.
Some maintenance and troubleshooting operations require opening the Electronics Controller box (left bottom block in the diagram above) while
the analyzer is powered. The highest voltage present in this box is 24V and is not hazardous. A higher voltage (+65V, 10 mA)
is shielded with an isolating plate and labeled. .
3) Thermal hazard
The gas cell can be heated up to +120 ºC and cause thermal injury to unprotected skin at direct contact. In normal configuration the cell is
wrapped in a thermal isolation jacket that prevents such incidents. DO NOT REMOVE THERMAL JACKET WHEN THE ANALYZER IS POWERED.
Prior to performing service operations that require removal of the thermal jacket, power the analyzer down and wait 30 minutes to let the
temperature drop to a safe level.
iii