Teledyne Insta Trans - trace and percent oxygen transmitter - Manual (Page 25)

Trace Oxygen Transmitter Installation
Teledyne Analytical Instruments 17
When the Micro-fuel Cell needs to be installed or replaced, follow
the procedures in Chapter 5, Maintenance, for removing and installing
cells.
3.6 Testing the System
Before connecting the signal wires to the transmitter:
 Check the integrity and accuracy of the gas connections.
Make sure there are no leaks.
 Verify that the restriction device has been properly installed
(see section 3.3).
 Check that inlet sample pressure is within the accepted range
(see section 3.3).
Connect the signal wires and energize the signal line, and test the
transmitter by performing the following:
1. Observe that the LCD display illuminates and that the
transmitter starts up in Run mode. If the transmitter is being
energizer for the first time or has been disconnected from the
power for a long period of time, wait about 60 seconds for
the 0.1 Farad storage capacitor to charge up before
attempting any tests.
2. If the right three digits of the LCD display are blank, the
transmitter is in an over range condition. Push the RANGE
button once to enter the Range Select mode. Observe that the
RNG annunciator illuminates. Push the RANGE button until
the transmitter displays an “in range” condition.
Note: Tthe transmitter can display a 99.9% over range condition,
so select a range where the left-most digit is blank.
3. Push the COARSE button. Observe that the CRS
annunciator illuminates on the display.
4. Push the
▲ and▼ buttons. Observe that the gas
concentration reading goes up and down in rather coarse
increments as the buttons are pushed.
5. Push the FINE button.
Observe that the CRS annunciator
goes out and the FIN annunciator illuminates on the display.