Teledyne 2020 - Explosion proof thermal conductivity analyzer - Manual (Page 59)

Thermal Conductivity Analyzer Operation 4
4-25 Teledyne Analytical Instruments
Use the UP/DOWN key to increment/decrement the range number to
01, 02, 03, or CAL, and Enter .
Imp: H2 Bck: N2
FR:Ø TO:1Ø %
Use the UP/DOWN key to increment the respective parameters as
desired.
Use the ENTER to move from Imp: (impurity) to Bck: (background),
FR: (from—lower end of range), TO: (to—upper end of range), and PPM
or %.
Last Enter will accept the values and the screen will display
OFFST/INVRT:
Standard:
ESC if your application is standard. If your application requires
OFFSET or Reversal output, ENTER will set your output as OFFSET or
REVERSAL. (See special function setup section 4.9 for more information).
. (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 out-
puts 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.