4IE-LGR-UxxxxM-22
Introduction
This datalogger is designed for autonomous measurements and recording
of physical and electrical data, with the data recording interval from 1 s to 24 h.
The inputs and ranges of quantities to be measured are determined
by the model type the user has bought. The user cannot modify them.
This portable device can be mounted in a fixed-position. To set up datalogger,
a PC with a USB interface is needed.
This device allows:
- to measure and process input data coming from internal or external sensors,
binary inputs, counters or current inputs.
- to detect and log minimum and maximum values (existing since their last
manual resetting) of each quantity,
- to display the measured values on an LCD display. Some features can be
controlled by two push buttons situated next to the display (device switching
off and on, deactivation of alarm signalling, Min/Max value resetting),
- to store an autonomous chronological record of measured values in internal
non-volatile memory. The values to be collected can be measured at the instant
of recording or as average or min/max values detected during the recording
interval. Recording can be performed continuously or at the alarm time only.
The recording mode can be also set optionally as non-cyclic to stop at the
memory filling up, or as cyclic. In this mode the originally recorded values will
be overwritten by fresh ones after the memory unit getting filled up.
- to set up two alarm signalling limits for each quantity to be measured. The alarm
signalling can be realised visually, optionally by a symbol appearing on the
display or by a short blink of an LED, or acoustically. In addition, all UxxxxM
series dataloggers contain a GSM modem enabling to send alarm SMS
messages to up to four selected receivers and can send values over a GPRS
data connection using JSON messages when changing the alarm status.
- to send data to the COMET Cloud storage system
- to send, at a configurable interval, informative SMS messages containing
device identification, currently measured values and alarm states to up to four
selected receivers. These messages may be of two kinds: user readable
(suitable to be displayed on a mobile phone), or machine readable (suitable
for automated data processing in a database or a cloud).
- In configurable interval to send measured values over a GPRS data
connection using JSON messages
- to be supplied in autonomous manner from an internal Li-ion rechargeable
battery. This can be charged by a common USB charger. An internal GSM
modem is connected to the supply unit only when a sending request has been
sent out, otherwise it is switched off to save energy.
- to communicate with a computer by means of a USB interface (all device
settings, recorded data downloading, and online monitoring).
To communicate, the datalogger utilises the HID USB standard, which does
not require additional controllers to be built into the PC.
