Teledyne 9060Z - Zirconium oxide flue gas oxygen analyzer - Manual (Page 22)

Model 9060Z Manual
22
4.8 CONNECTING THE AUXILIARY THERMOCOUPLE (OPTIONAL)
For 9060H heated probes, the auxiliary thermocouple must be a separate TC with the junction
isolated from earth, mounted near to and upstream of the oxygen probe. It can be either a K, J, R or S
type thermocouple. It is optional. If the auxiliary temperature or combustion efficiency is not to be
displayed or transmitted, then an auxiliary thermocouple is not necessary. The thermocouple should
be connected to terminals 7 & 8. These terminals will not be available for an auxiliary thermocouple if
a second probe has been installed.
4.9 CONNECTING THE OUTPUT CHANNELS
The two 4 to 20 mA DC output channels are capable of driving into a 1000Ω load. The output
terminals are 12 & 13 for channel 1, and 14 & 15 for channel 2.
4.10 CONNECTING THE ALARMS
A common alarm, which should be connected for all installations initiates on alarm functions
described below. Three additional alarm relays are available for selectable functions as listed in
chapter 9.2. Each relay has normally open contacts. The contacts will open in alarm condition. Relays
are connected as follows:
Relay Common Alarm Terminal Numbers 26 & 27
Alarm 1 28 & 29
Alarm 2 30 & 31
Alarm 3 32 & 33
Common Alarms All of the following conditions will cause a common alarm ‐
Probe 1 (2) Heater Fail
Ref Air Pump Fail Heater 1 (2) SSR Failure
Probe 1 (2) High Impedance ADC Calibration Fail Heater SSR Leakage
Probe 1 (2) TC Open Circuit Alarm Log Fail Probe 1 (2) Filter Blocked
Aux TC Open Circuit Output 1 (2) Failure Gas 1 (2) Calibration Error
BBRAM Fail
The watchdog timer is a special alarm. There will not be an alarm message displayed, but the
transmitter will reset.
Alarms can be accepted by pressing the alarm button (viewing the alarm messages).
Alarm relay 2 to 4 Select any one or all of the following for each relay. Refer chapter 9.
In addition, any of the selections that are removed from the common alarm relay can be added to
relays two to four.
High oxygen 1 (2)
Low oxygen 1 (2)
Very low oxygen 1 (2)
Oxygen deviation
Probe 1 (2) temperature low
Calibration check 1 (2) in progress
Probe 1 (2) purge in progress
4.11 CONNECTING THE AUTOMATIC PURGE AND CALIBRATION CHECK SYSTEM
CAUTION
The purge and calibration solenoid valves are supplied with mains voltage. This supply has
electrical shock danger to maintenance personnel. Always isolate the transmitter before working
with the purge and calibration solenoid valves.