Teledyne 9110T instruction manual Analog OUT, For the other modes

Model 9110TH NOx Analyzer Setup Menu

5.4.2.1. Analog Output Ranges for NOx, NO and NO2 Concentration

The analyzer has three active analog output signals related to NOx, NO and NO2 concentration, accessible through a connector on the rear panel.

ANALOG OUT

NOx Concentration			NO Concentration		NO2 Concentration
						Test Channel
		A1	A2	A3	A4	O2 concentration
						(if optional O2 sensor
	+		- +	- + -	+ -	is installed)

Figure 5-1: Analog Output Connector Pin Out

The A1, A2 and A3 channels output a signal that is proportional to the NOx, NO and NO2 concentrations of the sample gas, respectively. The 9110T can be set so that these outputs operate in one of the three following modes: single range mode, independent range mode, or automatic range mode (Section 5.4.3).

Additionally, the signal levels of outputs A1, A2 and A3 outputs can be:

∙Configured full scale outputs of: 0 - 0.1 VDC; 0 – 1 VDC; 0 – 5 VDC or; 0 – 10 VDC.

∙Equipped with optional 0-20 mADC current loop drivers (see Section 3.3.1.4 ) and configured for any current output within that range analog output (e.g. 0-20 mA, 2-20 mA, 4-20 mA, etc.).

Together these two set of parameters allow the user a great deal of flexibility in how the instrument reports NOx , NO and NO2 concentration to external devices. For example, Using the IND mode the following configuration could be created:

A1 OUTPUT: NOx Output Signal = 4 – 20 mA representing 0-1000 ppb concentration values

A2 OUTPUT: NO Output Signal = 0 – 10 VDC representing 0-500 ppb concentration values.

A3 OUTPUT: NO2 Output Signal = 0 – 5 VDC representing 0-500 ppb concentration values.

The user may also add a signal offset independently to each output (see Section 5.9.3.9) to match the electronic input requirements of the recorder or data logger to which the output is connected.

IMPORTANT	IMPACT ON READINGS OR DATA
	The instrument does not remember upper range limits settings associated
	with the individual modes. Changes made to the range limits (e.g. 400 ppb
	 600 ppb) when in one particular mode will alter the range limit settings
	for the other modes.
	When switching between reporting range modes, ALWAYS check and

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