Teledyne 7300A manual 4.6The Range Select Function, Manual Select/Define Range Screen, Operation

Infrared Gas Analyzer Operation 4

the number. Holding down the key speeds up the incrementing or decrementing.

•After the number (value) has been choosed, use Enter to move the desired parameter. Then use the UP/DOWN keys to change the parameter.

•Once the parameters for alarm have been set, Enter the alarm function again, and repeat this procedure for next alarm.

•To reset a latched alarm, go to Dft– and then use either UP two times or DOWN two times. (Toggle it to Y and then back to N.)

–OR –

Go to Ltch– and then use either UP two times or DOWN two times. (Toggle it to N and back to Y.)

4.6The Range Select Function

The Range function allows you to manually select the concentration range of analysis (MANUAL), or to select automatic range switching (AUTO).

In the MANUAL screen, you are further allowed to define the high and low (concentration) limits of each Range, and select a single, fixed range to run.

CAUTION: If this is a linearized application, the new range must be within the limits previously programmed using the System function, if linearization is to apply through- out the range. Furthermore, if the limits are too small a part (approx 10 % or less) of the originally linear- ized range, the linearization will be compromised.

In the AUTO screen, you are further allowed to select which gas application (PREVIOUSLY defined in APPLICATION function) to run.

4.6.1 Manual (Select/Define Range) Screen

The Manual range-switching mode allows you to select a single, fixed analysis range. It then allows you to redefine the upper and lower limits, for the range.

Use UP/DOWN key to start the RANGE function, and ENTER

Select range mode: MANUAL

Teledyne Analytical Instruments 4-23