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Quick Reference Guide
N2015 Current Loop Data Loggers
The N2015 data logger is a single channel current loop data logger measuring over the range 4-20mA. It is designed to
connect in series with your existing current loop. The following guide will explain some of the features of the new data
logger as well as giving details of the wiring required. Further information can be found in the Diligence EV manual which is
installed with the software. To open select Start-Programs-Evolution-Diligence EV Manual. The document is in Word
Format.
The Evolution software now supports a number of new features for quicker programming and data retrieval from the data
logger. ‘Quick Program’ allows the user to write and program a TASK with a click of a mouse button.
Quick Program
The easiest way to write a TASK for a data logger is to use the Evolution software feature Quick Program. Activate your
logger by pressing the navigation button on the front. Place it face down in the Interface. Run the software and select Quick
Program. After a few seconds a data logging task for your data logger will be displayed. Each task has a number of
predetermined settings. These are as follows:
Description
The Diligence EV data logger can store a short summary of the logging run being performed. This text appears when the
logged data is retrieved.
Channel Configuration
Channel (1) Only – 4-20mA Current Loop.
Channel Name
A descriptive name can be included for the channel.
Sensor Type
Diligence EV model N2015 is the current loop model measuring over the range 4-20mA.
Units
The software will automatically offer a list of Units applicable to the sensor type chosen above. The setting can only be
changed on the 1
st
enabled channel.
Scale Mapping
The scaling of the 4-20mA input can be chosen to display in a scale that you are more familiar with, e.g. 4-20mA might
represent
0-500mBar Pressure for instance. Use this section of the task form to set this up.
For example:
Enter maximum current (Hi) e.g. 20mA and corresponding unit value as e.g. 500mBar.
Enter minimum current (Lo) e.g. 4mA and corresponding unit value as e.g. 0mBar.
Resolution
The software allows the user to set the decimal point for the data. The software will then set the numerical value associated
with that decimal point setting, e.g. setting 0 decimal points allows values of +/-32000 to be recorded, whereas setting 4
decimal points gives readings to +/-3.2000 only. Select the number of decimal points that best represents the data you wish
to store.
Data Logger Operation
Once you have written the task you must either save it for use later or use it to program the logger. To save click on the
Save button and enter a file name. To program the logger select Program. The logger is now ready for use.
For Diligence EV models with display, it is possible to view the last logged reading and the alarm status of each individual
channel. With each single press of the navigation button on the front of the data logger a single bleep is emitted and the
Diligence EV display will cycle from the clock display through all enabled channels. The Bell symbol appears when any of
the enabled channels has logged an alarm. The Ringing Bell symbol appears whenever any of the enabled channels is
currently in alarm. It is possible to determine which channel is in alarm by cycling through the channel readings and noting
when “H” representing a high alarm or “L” representing a low alarm is displayed. An alarm indication can be acknowledged
and cleared down by pressing and holding the button on the front of the data logger for 3 seconds. A single bleep is heard
on the initial press followed by another single bleep after the 3 seconds has elapsed. Any further NEW alarm conditions will
still be indicated.
(2 pages)
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