Overview - Campbell EE181 Instruction Manual

Model EE181 Temperature and Relative Humidity Probe
5.

Overview

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4. After selecting the sensor, click Wiring Diagram to see how the sensor is
to be wired to the datalogger. The wiring diagram can be printed now or
after more sensors are added.
5. Select any other sensors you have, then finish the remaining Short Cut
steps to complete the program. The remaining steps are outlined in Short
Cut Help, which is accessed by clicking on Help | Contents |
Programming Steps.
6. If LoggerNet, PC400, RTDAQ, or PC200W is running on your PC, and the
PC-to-datalogger connection is active, you can click Finish in Short Cut
and you will be prompted to send the program just created to the
datalogger.
7. If the sensor is connected to the datalogger, as shown in the wiring
diagram in step 4, check the output of the sensor in the datalogger support
software data display to make sure it is making reasonable measurements.
The EE181 is a digital probe with linear voltage outputs for temperature and
humidity. Its voltage signals are measured with two single-ended inputs on the
datalogger.
Campbell Scientific recommends 12 V power when used with our dataloggers.
When minimizing power use is important, power can be switched on and off
for the measurement, provided there is a two-second warm-up delay. Switching
power avoids constant current flow through datalogger ground, which can
affect the accuracy of low-level single-ended voltage measurements.
The EE181 uses a metal mesh filter with excellent response, protection against
dust, and no water absorption.