Teledyne 9110T instruction manual Current Loop Analog Outputs Option 41 Setup, Test Channel

Model 9110TH NOx Analyzer Getting Started

ANALOG OUT

A1 A2 A3 A4

+- + - + - + -

Figure 3-8: Analog Output Connector

Table 3-5: Analog Output Pin Assignments

PIN	ANALOG OUTPUT		SIGNAL	STANDARD	CURRENT
				VOLTAGE OUTPUT	LOOP OPTION
1	A1	NOx	Concentration	V Out	I Out +
2				Ground	I Out -
3	A2	NO Concentration		V Out	I Out +
4				Ground	I Out -
3	A3	NO2	Concentration	V Out	I Out +
4				Ground	I Out -
7	A41	TEST CHANNEL		V Out	Not Available
8				Ground	Not Available

To change the settings for the analog output channels, see Section 5.9.2.

3.3.1.4. Current Loop Analog Outputs (Option 41) Setup

If your analyzer had this option installed at the factory, there are no further connectons to be made. Otherwise, it can be installed as a retrofit for each of the analog outputs of the analyzer . This option converts the DC voltage analog output to a current signal with 0-20 mA output current. The outputs can be scaled to any set of limits within that 0-20 mA range. However, most current loop applications call for either 2-20 mA or 4-20 mA range. All current loop outputs have a +5% over-range. Ranges with the lower limit set to more than 1 mA (e.g., 2-20 or 4-20 mA) also have a -5% under-range.

Figure 3-9 provides installation instructions and illustrates a sample combination of one current output and two voltage outputs configuration. This section provides instructions for converting current loop analog outputs to standard 0-to-5 VDC outputs. Information on calibrating or adjusting these outputs can be found in Section 5.9.3.7.

CAUTION – AVOID INVALIDATING WARRANTY

Servicing or handling of circuit components requires electrostatic discharge protection, i.e. ESD grounding straps, mats and containers. Failure to use ESD protection when working with electronic assemblies will void the instrument warranty. Refer to Section 14 for more information on preventing ESD damage.

Teledyne Analytical Instruments 43