Invisible Systems Limited
P a g e
|
15
7-9 Beetham Road, Milnthorpe Cumbria, LA7 7QL, England
Phone: 01539 722 520 Email: [email protected]
QC0150 Mains Powered Modbus Transmitter
Installation Manual
Each Transmitter will show the following
1.
Sensor ID
2.
Transmitter Type
3.
Battery Voltage
4.
Values being received
5.
Signal Strength and frequency
It is important to check all of this information to confirm that each sensor is being seen by the
gateway and at regular intervals in relation to (5). Blue colour dots show direct messages being
received and Orange colour dots show messages received via repeaters.
Correct setup and operation of Realtime-
online, will require all the Sensor ID’s and Transmitter types
in conjunction with the Gateway ID.
The RSSI is shown in dBm with a bar chart showing signal strength. This is an important parameter.
The table below shows dBm ranges in relation to Signal strength.
The range shown above reads -100dBm this is shown in the table as a Marginal signal therefore will
need improving either by reviewing the transmitter location, moving the Gateway closer or adding a
signal repeater in between transmitter and receiver.
Value
RSSI
dBm
Signal
Strength
Value
RSSI
dBm
Signal
Strength
2
-109
Marginal
17
-79
Good
3
-107
Marginal
18
-77
Good
4
-105
Marginal
19
-75
Good
5
-103
Marginal
20
-73
Excellent
6
-101
Marginal
21
-71
Excellent
7
-99
Marginal
22
-69
Excellent
8
-97
Marginal
23
-67
Excellent
9
-95
Marginal
24
-65
Excellent
10
-93
OK
25
-63
Excellent
11
-91
OK
26
-61
Excellent
12
-89
OK
27
-59
Excellent
13
-87
OK
28
-57
Excellent
14
-85
OK
29
-55
Excellent
15
-83
Good
30
-53
Excellent
16
-81
Good
Further technical reference and product info can be obtained from associated data sheets
