TMET User Instructions

TMET User Instructions
TU1032 - User Instructions for GenII TMET weather transmitter
The TMET is part of the Eltek GenII family of transmitters.
The TMET transmitter is designed to be used with the Vaisala weather monitor or
ultrasonic wind sensor and pyranometer. It provides comprehensive local weather
channels at the receiver/logger (referred to hereafter as RX250AL).
TMET accessories include an outdoor pole mounting enclosure, pole mounting solar
panel or AC power supply and additional air temperature sensor.
The TMET provides inputs for:
1 x RS232 plus power for the Vaisala WXT520 weather sensor or WMT52 ultrasonic wind
sensor
1 x 0-50mV range with scaling for use with Kipp and Zonen CMP3 pyranometer or Skye
Instruments SKS1110 pyranometer.
1 x Thermistor temperature input for use with a ground temp or radiant air temp sensor.
Page 1 of 16
TMET channel assignment:
Channels can be presented at the RX250AL together with those from any other GenII
transmitter and can be reordered during TX Set-up or when configuring the RX250AL.
Channels can only be renamed when configuring the RX250AL with Darca software.
Note: RX250AL channels are numbers 1 through 247. TMET channels are labelled A
through H.
TMET
Channel
Vaisala WXT520 connected
Vaisala WMT52
connected
Range
A
Wind direction
Wind direction
0°- 360°
B
Wind speed
Wind speed
0-60m/s
C
Rainfall
N/Asee Page 8
0.0 to 6500.0mm
D
Temperature
N/A
-52.0 to 60.0°C
E
Relative humidity
N/A
0 to 100%
F
Barometric pressure
N/A
600 to 1100hPa
G
Thermistor temperature probe
H
If Kipp & Zonen CMP3
connected, range is typically 05000w/m2 and is a function of
CMP3 calibration value.
-50.0 to 150.0°C
If Skye SKS1110
See page 5 “setting
connected range is up channel H”
0-5000w/m2
Note: Channels C to H are the instantaneous sensor values at the time of transmission.
Channels A and B are averaged values at the point of transmission, see Vaisala Notes P8
Page 2 of 16
Sensors that can be used with TMET
Vaisala WXT520: For operation and mounting, refer to
the User Guide supplied with the product. Ensure the
WXT520 is pointing north (refer to N← moulded into base
- see P147).
WXT520 supplied by Eltek is preconfigured and includes a
26.7mm or 30mm diameter pole top adaptor (see P148)
and 3M connecting lead. TMET powers the WXT520.
Note: TMET cannot provide wind gust data
Vaisala WMT52: For operation and mounting, refer to
the User Guide supplied with the product. Ensure the
WMT52 is pointing north (refer to N← moulded into
base).
WMT52 supplied by Eltek is preconfigured and includes a
26.7mm or 30mm diameter pole top adaptor and 3m
connecting lead. TMET powers the WMT52.
Note: TMET cannot provide wind gust data
Kipp and Zonen CMP3: Refer to the instruction sheet for
correct orientation and to the calibration certificate for
SENSITIVITY value, which will be required when setting the
H channel range. A mounting bracket/base may be
required. (e.g PyroBkt below). CMP3 does not require
power.
Note: TMET cannot provide sunshine hours.
Skye SKS1110: Refer to manual and product
specification. SKM221 levelling unit and SKM226 mounting
bracket may be required. SKS1110 does not require power.
Note: TMET cannot provide sunshine hours
PyroBkt: This is a pole mount robust bracket pre-drilled
for use with the Kipp and Zonen CMP3 and the SKS1110.
The mounting bracket positions the centre of the CMP3
approximately 155mm from the mounting pole. A
stainless steel U bracket with securing nuts is included.
Ensure that the CMP3 sensor is not in the path of the
shadow cast by the pole.
Page 3 of 16
Ground temperature probe: Eltek supplied thermistor
probes with U type sensors are rated +/-0.1°C for 0 to 70°C.
See the Eltek website for probe specification and cable styles.
Radiant air temperature probe: Grant Instruments type AG.
Refer to the Eltek website for additional information.
Accessories for TMET
WBT
Outdoor 25mm dia pole mounting
enclosure, 200 x 300 x 132mm
Weight (excludes TMET): TBA
WBT is supplied with 2 x 12mm and
2 x 16mm compression glands at
the base of the enclosure for
external antenna, solar panel or
12VDC power, pyranometer or
temperature probe cable access.
SPTMET
(if using any other
panel ensure max
charge current is
<1A to prevent
failure of FU2)
10W solar panel supplied with
25mm dia pole mounting bracket
and lead. Charge rate is 1A max.
For northern hemisphere locations
the SPTMET should be facing due
south. The bracket fitted provides
fixed inclination of 30 degrees and
is optimised for latitude 52 degrees
north. For extremes of latitude an
alternative bracket may be required.
MP12U/TMET
100/250AC to 12VDC power
supply. This is the standard MP12U
re-terminated with bare ends. The
+/positive lead is indicated by a red
sleeve.
Page 4 of 16
TMET Connections
Comms socket
+
0
+
0
RX TX
Temp
+
0
antenna
Screen
0
Pyro
Inner
+
Connections strip
WMT52
WXT520
Solar
7-12VDC panel
Battery header
Location of key components (panel removed):
black
brown
red
Battery
connector.
Observe
polarity!
7.2VDC NiMh battery with
built in temperature sensor.
D5 - LED
concealed
push button
switch
black
green
blue
D9 - LED
1 of 4
fixing
holes.
Fuse FU1, 1A
(12VDC input
protection)
Fuse FU2, 1A
(solar input
protection)
Sma Antenna
socket.Use
only antenna
marked “TMET”!
Lead to
“comms”
socket
Ensure Comms
head connection is
secured
Page 5 of 16
Powering the TMET
TMET is supplied with a 2Ah NiMh battery partially charged and disconnected. TMET can be charged
from a solar panel, Eltek type SPTMET or external 12VDC supply e.g. Eltek type MP12U.
Caution: do not use a panel rated greater than 10W
Charging using SPTMET solar panel
Connect solar panel to “Solar panel“ inputs. Observe polarity. Maximum current (1A max) from the
solar panel is connected directly to the battery. If the battery pack temperature sensor exceeds 50°C a
charge current limiter prevents overheating of the battery. Reversing the solar panel connections could
cause fuse FU2 to fail.
Charging using the MP12U
Connect MP12U to 7-12VDC inputs. Observe polarity. The input is reverse polarity protected; refer to
protection fuse FU1. D9 will illuminate. With MP12U connected the fast charge rate is approx. 350mA.
Battery temperature detection at 50°C will cause charging current to reduce. Fast charge is reduced if
the DC voltage is less than 12VDC.
Battery
The battery should be disconnected if the TMET is to be stored or not used for more than 5 days. This
is to prevent deep discharge of the battery which can degrade battery capacity and life.
To disconnect:
" Release the semi captive 4 x screws retaining the clear front cover
" Remove the 4 screws retaining information plate
" Carefully withdraw battery lead from header (this is the black/brown/red cable form).
To reconnect, reverse disconnect procedure. Ensure the lead is refitted correctly (see P5).
Caution!
Do not attempt to connect the solar panel and a 12VDC supply simultaneously as damage to the
TMET can result!
With a Vaisala sensor connected, battery capacity is rated for 5 days operation (once fully charged) in
the event of no charging source – i.e. complete cloud cover or 12VDC failure.
Locating the TMET
TMET is rated for indoor use only. If used outdoors, TMET must be housed in a secondary enclosure
e.g. outdoor unit type WBT from Eltek. The WBT is for mounting on a 25mm lightweight aluminium
pole.
TMET is supplied with a compressed antenna; to extend the range an external antenna can be used
e.g a light weight dipole antenna with lead, type LWANT/sma. Alternatively a Yagi antenna, available
from other suppliers can be used. Do not exceed 10mW ERP.
TMET range can also be extended by using the RP250GD repeater unit.
Refer to the information supplied by Vaisala for siting and mounting the weather/wind monitor sensor.
A 25mm pole top bayonet fitment is available from Vaisala.
Be aware that high power transmitters are frequently sited on top of buildings and could interfere
with either TMET or Vaisala sensors. As a precaution, site TMET and Vaisala devices clear of such
transmitter antennae.
Page 6 of 16
Indicators and concealed switch (located behind the fascia)
Red LED (D9) indicates external DC power is connected to the “7-12VDC” input.
Red LED (D5) cadence due to activation of the concealed switch (SW1):
Function
Activate
switch for
LED cadence
LCD
Tx disable
5 seconds
5 x fast flashes
After 5 seconds displays OFF
Tx enable
5 seconds
1 continuous 5 sec
flash
After 5 seconds displays
sensor information
Short flash at time of
transmission
No change
Test transmissions
2 seconds
approximately every
5 sec for 2 minutes.
Red LED (D5) due to TMET being configured or not configured:
TMET condition
LED
TMET not configured
“Blink” every 8
seconds
TMET configured
Short flash at time
of a transmission
Note
LCD
Battery gauge
displayed only
A transmission occurs See Display below
at a random time
within the set TX
interval
LCD
The LCD includes a battery condition gauge, active at all times (Battery gauge will flash if
battery failure imminent). Only configured channels are displayed.
If a channel is configured but not connected to the sensor the LCD shows:
A
OPEN
E
OPEN %
B
OPEN
F
OPEN
C
0.0
G
Lo °C
D
OPEN °C
H
Lo
Note: If the TMET is to be stored or will not be connected to a charging source for more
than 5 days, it should be disabled (put into hibernate mode) to prevent total battery drain
and possible loss of settings. To do this, first remove the clear front cover, and then remove
the label panel. Press the concealed switch (SW1) for 5 seconds. The LCD will now read
OFF.
Page 7 of 16
TMET configuration using Darca software
Refer to the Quick start guide (ref TU1008).
This is supplied with the RX250Al or can be downloaded from
http://www.eltekdataloggers.co.uk/literature.shtml
Connect the LCTX3 to the “Comms” socket. Don't forget to set up the logger interval first!
(Note that the TMET cannot be configured by the logger only.)
Before setting Tx channels please set the TX Interval:
Note: Tx channels A to G are pre-set. Select as appropriate, set channel and then meter to
check. Do not attempt to set alarms!
Configuring the Rain parameter in Darca Heritage for Tx Channel C (precipitation)
The value of rainfall recorded by the logger is the total measured during each logging
interval. It is important to consider the maximum expected value of rain during this time
period in order to optimise the range of the rain parameter.
In Darca Heritage, open the Parameters window by clicking Site Settings > Parameters.
As an example, if the maximum rainfall expected at the location is 5mm during a logging
interval of 5 minutes, set the Range of the parameter to:
Page 8 of 16
Setting / scaling Channel H for the Skye SKS1110 Pyranometer
" Connect the SKS1110 to the TMET: green to pyro +, red and blue to pyro 0.
" In Range for channel H, select EU Range from the drop down list. Click Set channel
and then Edit Eu Range (hardware range is 0.00 to 50.00mV).
EU range configuration:
" SKS1110 output is 10uV/Wm2
Assuming a typical UK day, clear and sunny equates to a solar radiation value of
1000W/m2 or more. Therefore, an SKS1110 will deliver 10mV at 1000W/m2 (SKS1110
usable to 5000W/m2)
TMET range is 0-50mV. Therefore 50mV equates to 5000W/m2
In the EU Range Selector: Channel H window (Do not click on Helper!)
Set Maximum to 50000
Set units to Wm2
Set DP Position to 1 then click OK
" Now check in Range for channel H that the text reads (EU Range) Voltage (0 to
5000.0Wm2)
Setting / scaling Channel H for the Kipp and Zonen CMP3 pyranometer
" Connect the CMP3 to the TMET: red to pyro +, black (screen) and blue to pyro 0.
" In Range for channel H, select EU Range from the drop down list. Click Set channel
and then Edit Eu Range (hardware range is 0.00 to 50.00mV).
EU range configuration:
" Refer to the CMP3 Calibration Certificate for SENSITIVITY value in uV /Wm. Let’s say for
example that the CMP3 output is 10.32uV/Wm2
" Assuming a typical UK day, clear and sunny equates to a solar radiation value of
1000W/m2 or more. Therefore, a CMP3 will deliver 10.32mV at 1000W/m2
" TMET range is 0-50mV. Therefore 50mV equates to 5000W/m2
" In the EU Range Selector: Channel H window (Do not click on Helper!)
" Set Maximum to 48450
" Set units to Wm2
" Set DP Position to 1 then click OK
" Now check in Range for channel H that the text reads (EU Range) Voltage (0 to
4845.0Wm2)
Now Close Transmitter Connections and follow the instructions, ending the routine by
clicking Send to Squirrel and then OK, and close the Window.
Page 9 of 16
TMET specification
Frequency:
Tx compliance:
Tx output power:
Useable Tx interval:
On air duration:
Environment:
Temperature Range:
Humidity:
Size:
Weight:
Connection strip:
Antenna “TMET”:
Default is 434.225Mhz (other frequencies are available)
To EN300 220 -1
10mW ERP
typically 10 seconds to 15 minutes
typically <200mS
Indoor only, rated IP40
-10 to +55ºC compliant to EN300 220-1, operational -30 to +60ºC
95% non condensing (TMET PCB is conformal coated)
120 x 120 x 55mm (excluding antenna)
560g
Standard 5mm pitch rising cage connector (included)
Supplied compressed spring, L=70mm, modified SMA base
Gain -3db
Antenna connector: SMA socket is mounted on the TMET
Fixing:
4 x 4mm dia holes (fixing screws are NOT provided)
Battery type:
customised (7.2v) 2.3Ah Ni-mH with built in temperature sensor
Battery endurance:
typically > 5 days if battery fully charged and with Vaisala connected
Charging time:
Using MP12U: typically 8 hours from discharged
Using SPTMET typically from discharged 1 day of full sun.
Max lead length to any connected sensor is 10M.
TMET to Vaisala connections
1
2
Yellow
3
TX
4
5
RXD
6
7
8
+
0
TMET
Blue
Red
Yellow
Blue
Red
Green
0 RX TX
Green
0
+
0
OUT
Screen
IN
+
+
IN
Pyro Temp
Inner
WMT52
WXT520
Solar
7-12VDC panel
9 10 11 12 13 14 15 16 17 18 19 20
WXT520/WMT52
Page 10 of 16
Vaisala notes and configuration
Note: The Vaisala device is set to take readings from the wind speed and wind direction
sensors every 5 seconds to create a rolling average value for every 12 readings (1
minute). Therefore averaged values are sent at the time of a TMET transmission.
RH, temp, precipitation and barometric pressure are instantaneous values at the time of
a TMET transmission.
Detailed setting information (if Vaisala software and USB configuration lead
available):
The configuration of the WXT520 or WMT52 can be checked using the Vaisala
Configuration Software.
" Connect the Vaisala device to the PC using the Vaisala USB configuration lead.
(Warning: Do not connect the Vaisala device to TMET and USB simultaneously!)
" Launch the software.
For WXT520 and WMT52:
" In File >Connection Setup, ensure the correct port is selected. To find the correct
port, open Control Panel > Device manager > Ports (COM & LPT) and note the
COM Port number allocated to “Vaisala USB Instrument”.
" Check or change values to be as shown, ensuring the correct port allocation in
Connect using drop down is selected. (allocation used is for illustration only):
Page 11 of 16
For WXT520: (For WMT52 go to page 14)
In Settings > Device Settings, set check boxes as below:
Page 12 of 16
In Settings > Message Settings, set check boxes as below:
Page 13 of 16
For WMT52:
In Vaisala Configuration Tool – No profile (Default Screen) adjust Averaging and 2
lots of Update interval as below:
Page 14 of 16
Message settings:
Page 15 of 16
Routine Maintenance
TMET:
Vaisala WXT520 and WMT52:
Skye Instruments SKS1110:
Kipp and Zonen CMP3:
Grant Instruments AG probe:
Eltek probes e.g. type ELCM:
No routine maintenance required. Battery packs
should be replaced after 36 months.
Vaisala (UK) advise there is no statement for
calibration period but suggest every year/18 months
is best practice.
Vaisala (WXT520 only) offer test and replacement of
the PTU (RH, temp and barometric
pressure) with test report (no calibration). For costs
refer Eltek or Vaisala direct.
Skye Instruments recommend calibration every 2
years. For costs refer Eltek or Skye
instruments direct.
Kipp and Zonen recommend calibration every 2
years. For costs refer Eltek or if in UK Equinox (UK
distributor) direct.
None required, calibration every 2 years.
None required, calibration every 2 years.
Guarantee
TMET and WBT are guaranteed for three years against faulty materials or workmanship.
The guarantee given for equipment supplied by us, but not manufactured by Eltek (this
includes all devices detailed in the “Sensors that can be used with TMET” is limited to the
guarantee given by the manufacturer of the particular product as follows:
Vaisala WXT520 and WXT52:
One year (extended warranty is available from Vaisala
at time of purchase only)
Skye Instruments SKS1110:
One year (extended warranty is available from Skye
Instruments at time of purchase only)
Kipp and Zonen CMP3:
Two years standard
Grant Instruments AG probe:
One year
Eltek probes e.g. type ELCM:
One year
Guarantee repairs to TMET or WBT are free of charge for labour, materials and return
carriage.
Associated information available from Eltek:
TN109 – GenII basic principles of operation.
TN110 – Receiver/Logger Alarm management.
User Instructions TU1032 (10/04/17)
Page 16 of 16
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