Teledyne 402REU - Hydrocarbon analyzer - Manual (Page 28)

Chapter 4 Model 402 R-EU
Teledyne Analytical Instruments 4-4
5. If the meter and recorder do not agree, open the electrical
control panel, and locate the span potentiometer’s slider
terminal. Under full scale conditions 1000 millivolts ±1mv
should be present. Using a digital multimeter set for about 2
volts, measure between the slider and ground. If necessary,
adjust the span potentiometer until 1000 mv (±1mv) is obtained,
and verify that all output devices agree; adjustment of devices
which read incorrectly may be required. If a remote indicator
panel or device is used, check that as well.
4.4 Placing the System in Operation
1. Turn the power switch to the ON position.
2. Place the range switch in the "HI" (widest) range
position.
3. Allow at least 2 hour warm-up (heat up sensor & sample
system) after making the air adjustment described below.
4. DO NOT attempt to ignite the flame yet. Condensation
will occur.
4.5 Activating the Support Gases
4.5.1 Air
1. Set the air tank regulator to 30 psig.
2. Adjust the instrument air regulator until the air pressure
gauge reads the recommended air pressure. See Figure 4-2.
3. Air should thus be flowing through the sensor during the
warm-up (see step 3 above).
After the air is flowing through the sensor and a 1 hour warm-up
has been completed, activate the following gases:
4.5.2 Zero Gas
1. Set the gas selector valve to the ZERO position.