Part V Owl Dc Voltage Data Logger; Description; Setup And Use - ACR Systems OWL 100 Manual

5 OWL DC Voltage Data Logger
Features
The OWL DC Voltage Data Logger provides a versatile means of recording a variety of signals in a
small, water-resistant enclosure. It can be configured for easy interface with common transducer
outputs.
5.1

Description

The DC Voltage Logger can measure and record analog Direct Current voltage covering 32 ranges
from 120mV to 38.4V full scale. The model available is the OWL-400.
How it Works
The logger uses a precision 2.5V reference voltage to convert the analog signal to a digital value. A set
of voltage divider resistors on the front end (before the analog to digital conversion) allows for 16
different input ranges. The voltage reference has its own 20:1 resistor divider network making a set of
low ranges. This doubles the number of selectable ranges to 32 in total. The digital values are
processed into voltage units by an equation in TrendReader Software.
5.2

Setup and Use

This section provides guidelines to follow to get started with the OWL DC Voltage Logger.
1. Connect the cable supplied to the signal being measured - see Figure 4.1
2. Run TrendReader Software and communicate with the logger by double clicking on the com port
icon and pointing the flashing wand at the logger's optical port. Once the Status menu is displayed
select the Setup option - see Figure 4.2
3. Make sure the DC Voltage equation is chosen. Then select a range that best fits the expected data
- see Table 4-1. DC Voltage ranges are picked to match the transducers full scale output value. For
example, if a transducer with a 0 to 5 volt output is used then range number 18 which measures up
to 7.3 VDC gives the best resolution.
© 2001 ... ACR Systems Inc.
OWL DC Voltage Data Logger 21