21
MAN-147-0018-A
•
input 2 is usually left disconnected (or allocated to use
as a ‘Tamper Alarm’
, or
used as a Status input).
(2) Inputs 1 and 2 can be used as a pair with a
Bi-directional meter
(one which can
measure both forward and also reverse flow).
For use in this configuration:
•
Input 1 acts to collect meter pulses, and
•
input 2 is used for the flow direction indication from the meter
(open = forward flow, closed = reverse flow).
(3) Inputs 1 and 2 can be used as a pair with a
Bi-directional meter
(one which can
measure both forward and also reverse flow).
For use in this configuration:
•
Input 1 acts to collect meter pulses (forward flow direction), and
•
input 2 acts to collect meter pulses (reverse flow direction).
Where the logger is
pre-configured by the factory to produce 2 Flow channels
(datapoint streams), the pair of inputs can be used as 2 independent uni-directional
Flow input channels (channels 1 and 2).
Each input can be used with a Uni-directional meter (one which only measures forward
flow / consumption).
5.4.2.
V
IA A
L
OGGER
4-
PIN
B
ULKHEAD
C
ONNECTOR
Multilog2 Flow signal inputs are presented on a 4-pin connector (see Figure 8 on page
12). Each connector has a pair of Flow signal inputs.
The pinout of this connector is shown below:
Check the meter to which the logger is going to be connected and ensure its meter
pulse signalling method is understood, along with the significance of each meter pulse.
Connect the logger to the meter-pulse outputs of the meter using a suitable cable. If
cables with bare tails have to be interconnected, refer to the guidance in section 5.5.
Use IDT to complete the setup, ensuring the logger is correctly set to interpret the
meter pulses. If the logger is required to keep track of the meter counter display, take
an initial reading of the meter counter and program it into the logger. The logger
uploads additional consumption regularly, so a meter reading can be made remotely.
5.5.
C
ONNECTING
U
NTERMINATED
C
ABLE
W
IRES TO
E
QUIPMENT
When using a cable that is unterminated, an installer will be required to make their own
connection to the other equipment on site.
When making a connection to Multilog2 you will normally need to splice the bare tails
together. It is important that
a waterproof connector housing is used, such as the “Tuff
-
Splice” enclosure available from HWM.
Logger bulkhead connector pinout : 4-pin Flow Inputs
Pin
A
B
C
D
Signal
(not connected)
Flow Input 1
Flow_GND
Flow Input 2