Getting to Know…
The Metron4
The Metron4 makes remote monitoring
simple and affordable, interfacing with
sensors, taking periodic readings and
transmitting them over the mobile
phone networks.
• Compatible with 1000s of sensors
• Remotely programmable
• Self-contained, weatherproof
• Proven and reliable
Intelligent solar regulator maximises battery life and solar charging potential and
includes pre charge conditioning if battery is in poor condition. There is also
temperature com pensation, meaning charge rate is adjusted according to battery
temperature, maximizing battery life.
Solar capability depends on orientation, sight of sun and location ( ie the further
from the equator the less power from the sun). In England, 10 minute transmissions
possible, in Scotland need a 2nd solar cell to achieve this.
Dimensions
185 × 337 mm base plate
The Metron4 is housed in a panel with the barriers. This panel needs to be in the safe area and
suitable sensors fitted in the field.
This augmented solution offers a sophisticated interface on site, with high resolution, colour
display of actual process (eg tank levels & graphics). It is used where more complex calculations
and commands are needed on site. MetronAS offers instant response to programmable inputs/
events, triggering immediate alarms and beacons Contact Powelectrics to discover more about
MetronAS and bespoke, application specific solutions.
Enclosure
400 × 300 mm wall mount panel with
hinged door.
ATEX Barrier(s)
Includes up to 4 ATEX barries,
such as MTL 554.
Sensor Cabling
Consider inductance and capacitance of cable
as well as characteristics of sensor.
For SPS Ex (from Powelectrics) with
LAPP12420 cable max. = 754m.
Metron4/S/SOL SYS
runs from a 10 Watt solar power
and lead acid battery via an intelligent charge regulator.
Metron4/S/...ATEX
for use in explosive atmospheres. For 110/230 Vac power supply.
MetronAS
(Augmented Solution)
Technical Specifications
Parameter
Details
Inputs
4 (4 – 20 mA, 0 – 10 V DC sensors or volt free contacts).
Expansion cards: 5 channel pulse (volt free, 10 Hz max.) & RS232 / R S485
(contact Powelectrics regarding protocols).
Outputs
Optional 2 relay outputs controlled either remotely or when threshold breached.
Communications
GSM (4G (CatM1 / NB1) with 2G fallback – worldwide frequencies).
Data Logging
80 per channel, first in first out.
Power Supply
Battery, 6 – 24 Vdc, 110/230 Vac, internal battery and solar options.
Sensor Excitation
Will provide power to sensors (5 V or 21.6 V, 31 mA max.) for a programmable length of time.
Environmental
IP67, -20 to +65ºC.
Programming
Normally remotely from MetronVIEW or locally via USB (Windows software free of charge from
Powelectrics. Mini USB not provided by Powelectrics).
Configurable Parameters
System
Inputs
Wake up interval (min: 1 min, max: 24 hr)
Type (analogue or digital)
Transmit interval (min: 5 min, max: 24 hr)
Tag name
Modem state (including idle, transmit on power
up, pollable)
Units of measure
Zero & span (scaling) and linearisation
Antenna selection (internal or external)
Alarm thresholds (10 high (rising) and 10 low
(falling))
Synchronisation time
Call out delay
Transmission window
Sensor excitation time and settling voltage
Display
The built-in back lit 40x40mm LCD display acts as a local gauge to help test the device and ensure
it is communicating well. It is also used to check sensors and wiring. Can be used as a local display
to show measured values on wake up.
138
75
68
Metron4/S
runs on 6-24Vdc. Allow 0.5 A. Ensure supply is well regulated.
For mains power 110/230 Vac, options are:
/MPSU
Mains (110 / 230 Vac)
power supply with backup
battery and regulator, housed in
a weatherproof enclosure and
a Metron4 fixed on base plate
(185 x 371 mm). Provides 6 Vdc
to Metron4
UPS 12 V
Uninterruptable power
supply is a separate box
(262 × 188 mm). Mains 110 / 230
Vac in 12 Vdc maintained output via
battery backup. Battery can typically
support 50 transmissions. IP54
protection rating. Run cable from UPS
12 V to Metron4.
Battery life depends on regime. The Metron4 is designed to maximise battery life. More
frequent readings, weak signal and cold temperatures will shorten battery life. Battery duration
also dependent on the type of sensor used. Typical life is 4 years if powering a 2 wire, 4-20
mA sensor for 2 seconds and transmitting once per day. Only use Powelectrics approved
batteries.
Metron4/SSM
runs from an internal battery.
