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Model 9110TH NOx Analyzer Setup Menu
Teledyne Analytical Instruments 117
5.9.2. ANALOG OUTPUT (DIAG AOUT)
Analog Output is used to verify functionality and accuracy of the analog outputs. The test forces all
analog output channels to produce signals ranging from 0% to 100% of the full scale range in 20%
increments. This test is useful to verify the operation of the data logging/recording devices attached to
the analyzer.
Section 12.7.6.1 presents instructions for use in troubleshooting and service.
5.9.3. ANALOG I/O CONFIGURATION (DIAG AIO)
The 9110T analyzer comes equipped with four analog outputs. The first three outputs (A1 A2, & A3)
carry analog signals that represent the currently measured concentrating of NO
x
, NO and NO
2
(see
Section 5.4.2.1). The fourth output (A4) outputs a signal that can be set to represent the current value of
one of several test functions (see Table 5-9).
The following table lists the analog I/O functions that are available in the 9110T analyzer.
Table 5-5: DIAG - Analog I/O Functions
SUB MENU FUNCTION
MANUAL
SECTION
AOUT CALIBRATED
Initiates a calibration of the A1, A2, A3 and A4 analog output channels that
determines the slope and offset inherent in the circuitry of each output.
These values are stored and applied to the output signals by the CPU
automatically.
5.9.3.1
CONC_OUT_1
Sets the basic electronic configuration of the A1 output (NO
x
Concentration).
There are four options:
RANGE
1
: Selects the signal type (voltage or current loop) and level of the
output
REC OFS: Allows them input of a DC offset to let the user manually adjust
the output level
AUTO CAL: Enables / Disables the AOUT CALIBRATION Feature
CALIBRATED: Performs the same calibration as AOUT CALIBRATED, but
on this one channel only.
5.9.2
CONC_OUT_2
Same as for CONC_OUT_1 but for analog channel A2 (NO Concentration)
CONC_OUT_3
Same as for CONC_OUT_1 but for analog channel A3 (NO
2
Concentration)
TEST OUTPUT
Same as for CONC_OUT_1 but for analog channel A4 (TEST CHANNEL)
5.9.4
AIN CALIBRATED
Initiates a calibration of the A-to-D Converter circuit located on the Motherboard.
5.9.3.10
XIN1
.
.
.
XIN8
For each of 8 external analog inputs channels, shows the gain, offset,
engineering units, and whether the channel is to show up as a Test
function.
5.9.3.11