Carbon Monoxide Alarm User Manual

4 Operation Model 7300A

4-32 Teledyne Analytical Instruments

Note: The span gas use to span the analyzer must be >90% of the

range being analyzed.

Before starting linearization, perform a standard calibration. See section

4.4. To enter data:

From the

MAIN MENU

screen—

1. Use UP/DOWN to select ALGORITHM , and

Enter

2. Select and

Enter

SETUP.

Enter

AUTO from the Calibration Mode Select screen.

The Auto Linearize Mode data entry screen appears.

1.95 % CO2

Input(Ø) :2.00

5. Use the UP/DOWN keys to set the proper value of calibration

gas, and

Enter

. Repeat this step for each cal-point number as it

appears in the Input (x) parentheses.

6. Repeat step 5 for each of the special calibration gases, from the

lowest to the highest concentrations.

Escape

when done.

To end the session, send:

st<enter>

to the analyzer from the computer.

4.9 Special Function Setup

CAUTION: The programming functions of the output signal

reversal, polarity reversal and gain preset are config-

ured at the factory to the users application specifica-

tion. These functions should only be reprogrammed

by trained, qualified personnel.

4.9.1 OFFSET OUTPUT/Reversal Output

4.9.1.1 Output Signal Reversal

Some applications require a reversal of the output signals in order for the

4-20mA and 0-1 V DC output signals to correspond with the low and high end

of the concentration range. For example, if an application involves the analysis

of 85-100% oxygen in a background of argon by measuring the thermal conduc-