Teledyne 9110AH Instruction Manual page 123

TELEDYNE Model 9110AH NO
Table 9-1: Test Functions (Continued)
Test Function
CONV TEMP
O3KL TEMP
RCEL PRESS
SAMP PRESS
SLOPE
OFFSET
TIME
Analyzer Operator Manual, 01620, Rev. F
X
Factory Set-Up Comment
700 C 10 C The CPU controls the converter temp to 700 C. After cold start it
requires about 30 min to come to temperature. After temperature is
reached, it should not vary more than 10 C. See Section 9.3.4 for
315 C 5 C
troubleshooting. Warning limits are < 690 C and > 720 C.
The M9110AH can be equipped with a molybdenum converter as an
200 10 C
option. The troubleshooting is the same as listed above except the
warning limits are <290 C and > 320 C.
If the M9110AH is equipped with the M501 external converter option,
the converter housing is equipped with a heater to warm the ozone
killer catalyst to 200 C.
3 – 10 "-Hg-A RCEL is the pressure in the Reaction Cell. The instrument is very
(Thomas 607) sensitive to variations in reaction cell pressure. 10% change in output
per 1"Hg pressure is typical. Higher altitudes will decrease cell
pressure due to lower pump back pressure. Pressures higher than the
acceptable range will decrease instrument sensitivity and increase
noise.
29.5"Hg at sea The sample pressure is taken upstream of the reaction cell. It usually
level runs about 0.5" less than ambient pressure due to the restrictions in
the sample intake tubing. Sample pressure should be within 1"Hg of
atmospheric pressure. The pressure sensor used reports absolute
pressure and therefore is sensitive to altitude, weather fronts, and
room air conditioning. Change due to altitude is about 1" per
1000 ft., other changes are
inlet will cause the M9110AH to be noisy and to shift its reading.
1.0 0.3 NO and NO
calibrate the analyzer. When the instrument is span calibrated, this
parameter is set so the analyzer front panel and analog output show
the expected span gas concentration. There can be 2 values for
SLOPE if AutoRange is enabled.
0 25 NO and NO
the instrument is zeroed, the offset term is set so the concentration
reads 0 ppm. There can be 2 values for OFFSET if AutoRange is
enabled.
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.
9-7
0.4" maximum. Pressurizing the sample
SLOPE. The slope is a software gain factor used to
x
OFFSET. The offset is used to zero the analyzer. When
x