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Rev 1.0 RFID LOGGER – USER MANUAL
The RFID logger is a small compact data logging device that uses near
field communication (NFC) to communicate with Android devices that
have NFC capability or with the PC using a special RFID reader that
plugs into a USB port.
This logger can record 8100 samples in non-volatile memory at a user
selectable rate from 10 seconds to 60 minutes per sample, equivalent
to
a record time of 22 hours to over 338 days. This time is halved for a
two channel device. The logger can also acquire samples at a rate
faster than the record interval, and these samples can be averaged, or
the maximums and minimums calculated.
The logger has a bi-colored LED that is used to indicate record status and alarms when the button is
pressed momentarily. The LED blinks twice – the first blink is the Record status and the second blink is
the alarm status. The button can also be used to stop and start the recording if programmed by the
user.
There are three user programmable record modes – record now, record on button press, record later.
Record Now – the logger starts recording as soon as a configuration file is uploaded to it using the
Android device or the PC USB reader.
Record on button press – the logger remains dormant until the user performs a long press on the
button at which time recording starts. Once started, the recording can be ended by a second long press
on the button.
Record later – the logger remains dormant for a period of up to 999 hours as programmed by the user
after the configuration file is uploaded to the device before starting to record.
The record status is indicated by the first LED blink. RED means the unit is not recording, GREEN means
the unit is currently recording.
The logger has four alarms which can be programmed as high or low by the user. The alarm status can
be checked by a user with a short press of the button. The alarm status is indicated by the second LED
blink . RED means an alarm occurred, GREEN means no alarm occurred. The alarms become active when
the logger starts recording.
Each logger has a unique fixed serial number and a 20 character unit tag which can be programmed by
the user.
Software allows the user to configure the logger. The current configuration can be read from the logger
using the Android device or the PC USB reader, or can be loaded from a stored file on the PC or Android
device. The user can alter the record mode, record rate, sample rates and data type – instantaneous,
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average, minimum, or maximum. The unit tag can be modified, the time zone selected, and the alarms
programmed. This configuration is then uploaded to the logger to start the record cycle.
Software is also used to upload and analyze the recorded data. The data can be depicted graphically or
in the form of a data table. There are different summaries available which indicate record start and end
times, number of samples, average maximum and minimum of the data recorded and alarm status.
The user can perform a quick read which will indicate record status, record start and end times and
alarm status. This takes just a second and can be used by the user to determine if data needs to be read
from the device, a process that takes around five to ten seconds.
On the PC, data can be saved to a file in native format or as a CSV file for import into an Excel spread
sheet. On the Android device data can be saved to a file or emailed to a remote recipient.
Reading and Writing
The logger uses near field communication (NFC) to communicate with Android devices that have NFC
capability or the PC using a special reader that plugs into a USB port. Near field communication is a form
of low-power radio communication that is effective only when the devices are in close proximity to one
another (touching). The logger has a small antenna that needs to be within the field of the companion
evice, either the Android device (smart phone or tablet) or the PC USB reader. Communication is
d
position dependent.
The antenna coil in the logger is between the
button and the loop handle at the top of the
device. You need to know where the antenna
coil is on your phone/tablet, and ensure that
the logger antenna coil is within that coil.
Keep the logger close to your Android device
with the logger antenna coil in the NFC Area of
the Android device. If possible keep the battery
away from the NFC field.
Follow the instructions in the Android
application.
LED Status Indication
The LED on the device will indicate the record and alarm status by blinking when the button is pressed
and released quickly. (Less than a second).
The first LED blink indicates the record status: RED means the unit is not recording, GREEN means the
unit is currently recording.
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The second LED blink indicates the alarm status: RED means an alarm occurred, GREEN means no alarm
occurred. Note that there will be no second blink if the unit has not started recording.
Note: If the logger has not been programmed – no configuration loaded, the LED will blink AMBER
twice. If the logger successfully receives a new configuration file it will blink GREEN once if it has a
delayed record start or twice if it starts recording right away.
Operational Overview
LED:
Response to quick button press.
1st Blink – Record Status:
2nd Blink – Alarm Status:
RED – not recording
RED – No Alarm occurred
GREEN – recording
GREEN – Alarm occurred
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Button:
Short Press < 3 sec: LED Status Indication – see LED above
Long Press > 3 sec: Only valid in Button Press Mode
Modes:
Single RED blink indicates logger is waiting to record, either on button press or delay start
Recording ended, No Alarm occurred --- --- Recording, No Alarm occurred
Recording ended, Alarm occurred --- --- Recording, Alarm occurred
If this is 1st long press since loading config – START Recording, LED blinks GREEN twice
If this is 1st long press WHILE recording - STOP Recording, LED blinks RED, Alarm Status
Any button press after recording has STOPPED will show status on LED - RED, Alarm Status
Record Now:
Button Press – shows status per LED above.
Once started by user cannot be stopped until memory fills.
Button Press:
Button Press – if < 3 sec shows status
If > 3 sec, starts or stops recording per Button Long Press above. (1 time cycle)
Once STOPPED by button press cannot start recording unless new config loaded.
Delayed Start:
Button Press - shows status per LED above. Once started by user cannot be stopped until
memory fills.
Note that if recording has not started due to delay not reached, the record status will show as
NOT RECORDING. --- (Single RED blink)
Once a record cycle has ended, by time or button press, subsequent button presses will show status.
To Restart or reset any record mode the device must have a new configuration file downloaded.
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