May 2020, Rev 4
Page
5
of
6
PART B.
THE PRESSURE SYSTEM
B1.
PRESSURE GAUGE
The pressure gauge is of a heavy duty construction and designed to withstand both normal transit and
portable handling conditions.
Two common developments that can often indicate a faulty gauge are :-
(i)
The indicating pointer being off zero.
(ii)
A jerky pointer action when increasing or decreasing pressure.
In either condition the gauge should be removed and undergo an overhaul/calibration check.
B2.
PRESSURE TUBE
In the event that the flexible pressure tubing between the flow tube and the pressure gauges becomes
blocked, then remove the entire tube and pressure purge out and refit or replace with new tubing.
PART C.
WIRING
(i)
Only one wire should be inserted into a terminal. Splice double wires outside the terminal.
(ii)
External Reset for Total #1:
Use no more than 30m (100ft) of 2-conductor twisted-pair cable
connected to a dry contact (for example, an ordinary door-bell button or relay contact).
(iii)
Only Totalizer #1 can be reset by the external connection.
(iv)
Total #1 will not be displayed unless it is the standard totalizer selection
INSTRUCTIONS
(i)
Remove 10mm (3/8 in.) of insulation from sensor cable conductors.
10mm
(ii)
Press down on orange lever to open terminal.
(iii)
Insert wire into terminal until it hits bottom.
(iv)
Release the lever to secure wire.
Use this wiring scheme for flow sensor model: 515 and 525
Splice BLACK and SHIELD
Together outside of terminal
BLACK
+
+
1
RED
SHEILD
2
#1 #2
3
4
515
5
6
Connect shield to
- -
Ground Wire
Totalizer 1
515
Remote Reset
Terminal no
.
Function
1 (top) Black
Signal Ground
2
Red
Sensor signal
3
Open Collector Signal
4
DC Power to sensor
5
Ground
6 (bottom)
Ext. Reset
