Verifying Voltage Or Current Output Connection - Intec AIRSENSE I-310e Operator's Manual

Microprocessor-based, infrared environmental co2 sensor

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Table of Contents

I-310e – UserManual

The type of analog output is determined by the setting of the

analog output selector shown in Figure 2.

The analog output of the Model I-310e is completely

isolated from the power supply. The common outputs of

multiple units can be connected together with no

interaction regardless of power supply hook-up.

Voltage

When the outboard and middle pins of the analog output

selector are connected with the shorting block, a voltage

output appears between the two terminals marked ANALOG

OUTPUT. The output voltage increases linearly from 0

volts at the low output threshold to 10 volts at the high

output threshold. The unit is shipped from the factory with

the low output threshold at 0 ppm and the high output

threshold at 2000 ppm. See the Analog Output Range

Adjustment section on page 7 to change the analog output

range limits.

Current

When the inboard and middle pins of the analog output

selector are connected with the shorting block, a current

output appears between the two terminals marked ANALOG

OUTPUT. The output current increases linearly from 4 mA

at the low output threshold to 20 mA at the high output

threshold. The unit is shipped from the factory with the low

output threshold at 0 ppm and the high output threshold at

2000 ppm. See the Analog Output Range Adjustment section

on page 7 to change the analog output range limits.

If the total resistance between the two terminals exceeds the

specified maximum loop resistance, the output current may

be erroneously low at high concentrations.