28 part i – Teledyne 6020 - Photometric analyzer User Manual

Page 52

3 Operation

Model 6020

3-28 Part I

Teledyne Analytical Instruments

: 4

Use the UP/DOWN switch again to move the blinking to

APPLICATION

and

Enter

Ñ> 1 2 3

<С

С> 1 2 3

<С

С> 1 2 3

<С

С> 1 2 3

<С

С> 1 2 3

<Ñ

Use the UP/DOWN switch to increment/decrement the range number to

01, 02, 03, or CAL, and

Enter

**********

: :1 %

Use the UP/DOWN switch to increment the respective parameters as

desired, and

Enter

to move to the next. On the last field %/ppm Enter to accept

the values and return to range selection menu. (See note below.) Repeat for each
range you want to set.

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

if Range 1 is set to 0–10 % and Range 2 is set to 0–100 %, then
Range 3 cannot be set to 0–50 % since that makes Range 3
lower than Range 2.

Ranges, alarms, and spans are always set in either percent or ppm units, as

selected by the operator, even though all concentration-data outputs change
from ppm to percent when the concentration is above 9999 ppm.

Note: When performing analysis on a fixed range, if the concentra-

tion rises above the upper limit as established by the operator
for that particular range, the output saturates at 1 V dc (or 20
mA). However, the digital readout and the RS-232 output
continue to read regardless of the analog output range.

To end the session, send:

st
st

to the analyzer from the computer.

3.8.2 The Curve Algorithm Screen

The Curve Algorithm is a linearization method. It provides from 1 to 9

intermediate points between the ZERO and SPAN values, which can be normal-
ized during calibration, to ensure a straight-line input/output transfer function
through the analyzer.