User guide

4 Operation Model 3020M

4-16

Teledyne Analytical Instruments

The automatic air calibration range is always 0-25 % and is not pro-

grammable.

4.11.1 Setting the Analog Output Ranges

To set the ranges, ENTER the RANGE function mode by selecting

RANGE from the MAIN MENU. The RANGE screen appears.

L—5.00 M—25.00

H—100.00 Mode—AUTO

Use the DOWN/UP control to the range to be set: low (L), medium (M),

or high (H).

Use the DOWN/UP control to enter the upper value of the range (all

ranges begin at 0 %). Repeat for each range you want to set. ENTER to

accept the values and return to the Analysis Mode. (See note below.)

Note: The ranges must be increasing from low to high, for example,

if range 1 is set as 0–10 % and range 2 is set as 0–100 %, range

3 cannot be set as 0–25 % since it is lower than range 2.

4.11.2 Automatic Ranging

After defining your analysis ranges, set Mode– to AUTO, if not already

there. ESCAPE to re-enter the ANALYZE screen using the fixed range.

4.11.3 Fixed Range Analysis

The autoranging mode of the instrument can be overridden, forcing the

analyzer DC outputs to stay in a single predetermined range.

To switch from autoranging to fixed range analysis, ENTER the

RANGE function by selecting RANGE from the MAIN MENU.

Use the DOWN/UP control to move AUTO between the arrows.

Use the DOWN/UP control to switch from AUTO to FX/LO, FX/

MED, or FX/HI to set the instrument on the desired fixed range (low, me-

dium, or high).

L—5.00 M—25.00

H—100.00 Mode—FX/LO

L—5.00 M—25.00

H—100.00 Mode—FX/MED