Teledyne 9060Z - Zirconium oxide flue gas oxygen analyzer - Manual (Page 7)

Model 9060Z Manual
7
1. IMPORTANT NOTICES
This manual is intended as a supplement to the 9060Z Operators Manual. It is intended to be used by
technical personal that are qualified to install, commission, service and calibrate electronic industrial
control equipment.
Please read the safety information below before connecting power to the transmitter.
CAUTION 1
The probe heater is supplied with mains voltage. This supply has electrical shock danger to
maintenance personnel. Always isolate the transmitter before working with the probe. The EARTH
wires (green/yellow) from a heated probe must ALWAYS be connected to earth.
CAUTION 2
Combustion or atmosphere control systems can be dangerous. Burners must be mechanically set up
so that in the case of equipment failure the system cannot generate explosive atmospheres. This
danger is normally avoided with flue gas trim systems by adjustment so that in the case of failure the
appliance will not generate CO in excess of 400 ppm in the flue. The CO level in the flue should be
measured with a separate CO instrument normally an infrared or fuel cell type.
CAUTION 3
The oxygen probe is heated to over 700°C (1300°F) and is a source of ignition. Since raw fuel leaks can
occur during burner shutdown, the transmitter has an interlocking relay that removes power from the
probe heater when the main fuel shut‐off valve power is off. If this configuration does not suit or if it
is possible for raw fuel to come into contact with a hot oxygen probe then the Model 9060Z
transmitter with a heated probe will not be safe in your application. An unheated probe can be
utilized in such applications, however the oxygen readings are valid only above 650°C (1200°F).
CAUTION 4
The reducing oxygen signal from the transmitter and the associated alarm relay can be used as an
explosive warning or trip. This measurement assumes complete combustion. If incomplete
combustion is possible then this signal will read less reducing and should not be used as an alarm or
trip. A true excess combustibles analyzer, normally incorporating a catalyst or thermal conductivity
bridge, would be more appropriate where incomplete combustion is possible. Also read the probe
electrical shock caution in the probe heater interlock caution in chapter 4.7
CAUTION 5
FIL‐3 filter. If the optional FIL‐3 has been fitted to the 9060H probe in this installation, please read the
Important Notice regarding probe option FIL‐3 on the previous page.
CAUTION 6
CAUTION 7
The heater is supplied from the mains power directly, and the temperature is controlled at 720°C
(1330°F). The outside of the process end of the probe can get to temperatures that are dangerous to
touch. Wear insulating gloves when handling a probe that has been on.