5
3.3
Wiring
Caution: Ensure electrical mains are disconnected before proceeding.
1. Connect the power supply to the three-pin terminal block
•
VAC live wire = 1
•
VAC neutral wire = 2
•
VAC protective ground wire = 20 OR 21
α
lpha TDS 190 controller accepts voltages from 85 to 260 VAC, 50/60 Hz or DC.
2. Connect the Pt 100 leads to terminals 13 to 15 of the seven-pin terminal block.
Either wire can be connected to either terminal. Terminals 13 and 14 must be
shunted unless using a 3-wire RTD.
NOTE:
α
lpha TDS 190 is factory set for Automatic temperature compensation.
MTC can be selected in Program P4.0.
3. Power on the controller. The display automatically shows the TDS reading, the
ppm and ‘MEAS’ annunciators’ lights.
NOTE: In the event Pt 100 is not connected or the connection is broken in the ATC
mode, the display flashes ‘OR’ to alert you.
3.4
Panel-mounting the controller
The supplied mounting hardware allows surface mounting to all panels and
protective enclosures. Mounting cut-out size is 91 x 45 mm.
To attach the mounting to the controller:
1.
Align the catch to the side of the controller, and insert threaded rods through
catch.
12 11 10 9 8 7 6 5 4
3 2 1
19 18 17 16 15 14 13
21 20
2.
Screw the threaded-rod through the catch in a clock-wise direction. Tighten
until the catch holds the controller firmly against the back of the panel or
protective housing. Repeat on the other side.
