Hydrological Services Pty Ltd
Wireless Level Transmitter
©
Copyright
WLT420 100-4
Issue 1.20 5 Dec, 2007
B
Battery -
Aerial
Wireless Level
Transmitter
Tran
Transducer -
Configuration
DIP Switches
Status LED
2. Installation
2.1
Hardware Connections
The Wireless Level Transmitter periodically switches the battery voltage to the transducer for
the warm up time (preset on the DIP switches) and then measures the 4-20mA current.
The terminals are screwless, simply push the wire into terminal hole – you may need to
depress the orange release lever if fine wire is used. This lever is also used to remove the
wire.
1
2
3
4
5
6
8
7
0=off
1=on
4:
0=AUS 1=US
Freq 0 1 2 3 4 5 6 7
1: 0 1 0 1 0 1 0 1
2: 0 0 1 1 0 0 1 1
3: 0 0 0 0 1 1 1 1
TxInt cnt 1 15 60
5: 0 1 0 1
6: 0 0 1 1
WarmUp 2 5 10 15
7: 0 1 0 1
8: 0 0 1 1
DIP Switches 1,2,3 set the transmission frequency
and DIP switch 4 sets the frequency band for :
USA and Australia.
0 = 905.5MHz 917.5MHz
1 = 906.5MHz 918.5MHz
2 = 907.5MHz 919.5MHz
3 = 908.5MHz 920.5MHz
4 = 909.5MHz 921.5MHz
5 = 910.8MHz 922.5MHz
6 = 911.9MHz 923.5MHz
7 = 912.5MHz 924.5MHz
DIP Switches 5 and 6 set the transmission interval (in
minutes) to continuous, 1 min, 15 min and 60 min.
DIP Switches 7 and 8 set the transducer warm up (in
seconds) to 2 secs, 5 secs, 10 secs and 15 secs.
