Table 9-1: Test Functions - Teledyne 200A Instruction Manual

Teledyne API Model 200A NO
Table 9-1: Test Functions (Continued)
Test Function
IZS TEMP
RCEL PRESS
SAMP PRESS
SLOPE
OFFSET
TIME
Analyzer Instruction Manual, 02246, Rev. F1
X
Factory Set-Up Comment
± The IZS temperature is the temperature of the permeation tube
50 0.4° C
oven. This temperature is controlled by the CPU and is adjustable
in 0.1° C increments. This adjustment allows small changes in
permeation tube temperature so the permeation rate can be
adjusted to an even value. The control loop variations show a
temperature swing at the control thermistor of a few tenths of a
degree. Temperature fluctuations of the perm tube however are
less than 0.1° C. Warning limits are < 45° C and > 55 ° C.
RCEL is the pressure in the Reaction Cell. The instrument is very
±
5 1 in-Hg-A
sensitive to variations in reaction cell pressure. 10% change in
(Thomas 607)
output per 1"Hg pressure is typical. The pressure reading will
±
7 2 in-Hg-A
change when going to the AutoZero cycle, otherwise it should
remain constant. Higher altitudes will decrease cell pressure due to
(ASF internal)
lower pump back pressure. Pressures out of the acceptable range
will decrease instrument noise performance and sensitivity.
29.5"Hg at sea The sample pressure is taken just upstream of the reaction cell. It
level usually runs about 0.5" less than ambient pressure due to the
restrictions in the sample intake tubing. Sample pressure should be
within
reports absolute pressure and therefore is sensitive to altitude,
weather fronts, and room air conditioning. Changes due to altitude
is about 1" per 1000 ft., other changes are
Pressurizing the sample inlet will cause the M200A to be noisy
and to shift its reading.
This is the software slope value. It operates like a software gain
±
1.0 0.3
pot. Refer to Table 7-19 on Calibration Quality for additional
information.
± This is the software offset value. It operates like a software DC
0 150
offset pot. Refer to Table 7-19 on Calibration quality for
additional information.
This is the time of day clock readout. It is used to time the
AutoCal cycles. The speed of the clock can be adjusted by the
CLOCK_ADJ variable in the VARS menu. The clock can be set
via SETUP-CLOCK-TIME from the front panel.
±
1"Hg of atmospheric pressure. The pressure sensor used
9-7
±
0.4" maximum.