Notice that the channels we use leave a much smaller footprint than WLAN. Also notice that one WLAN channel
radiates a signifi cant amount of energy onto several of the
adjacent WLAN and controller channels.
For the most reliable communication between the S/R controller
and the tool in a 802.11b/g LAN environment, it is usually best
to choose a channel for the controller and tool that is separated
from the channel of the LAN.
Unlike IEEE 802.15.1 (Bluetooth) radios, the our 2.4GHz radio
modules do not frequency hop, use less power and have faster
response times with less impact on other wireless devices. A
wrench only transmits a small packet of data after each torque
operation, and each transmission lasts about 30ms (0.03 sec-
onds).
The 2.4GHz radio used by the unit and the tool is certified in
the United States (FCC), Canada (IC), and Europe (CE).
Torque wrench output power:
1mw
Controller 2.4GHz output power: 10-60mw
Typical 802.11b/g output power: 100mw
Establishing RF Communication With S/R Controllers
The procedure used to establish RF communication with the SR controllers varies by controller. Regardless of the
controller, however, there are two important elements to understand and one procedure that it is useful to know.
The first element is that the system uses the identification number of the transceivers in establishing
communications. The transceiver in the controller and the one in the torque wrench each have identification
numbers. When communication between the two is first established, the numbers are exchanged and stored in
memory. The controller and tool will thereafter ignore communications from other radios until the number stored in
memory is replaced with a different identification number.
The second element is that under all conditions the controller and the tool to be used with it must be on the same
channel. If the channel on the controller is changed and the channel on the tool is not, they will not communicate or
will cease communicating if they have previously been associated with each other.
To remove the identification of the TV unit from the tool memory, click the wrench and hold it in the clicked position
until the LED on the wrench flashes. This will take about 5 seconds. Release the pressure on the tool and allow it to
return to the normal position.
The flashing of the LED occurs when the memory of which controller the tool was associated with has been erased.
The tool is now ready to be associated with another controller.
Note that when the battery has been removed and replaced in the wrench the LED will alternate between emitting
red and green light several times very quickly. If the alternating color emission stops and then a red light pulse is
emitted, the tool is not associated with a specific controller and can be associated with whatever unit is desired. If
the alternating color emission stops and then a green light pulse is emitted, the tool has a specific controller unit
identification number in memory and is ready to be used with that unit.
To establish communication with the controller, it is necessary to follow the instructions included with the specific
controller to be used. The simpler controllers use one methodology, and those with advanced features in their
programs use another.
Frequency Map of 802.15.4 vs. 802.11b/g
Center Frequency (GHz)
Channel 802.15.4 802.11b/g
1
2.410
2.412
2
2.415
2.417
3
2.420
2.422
4
2.425
2.427
5
2.430
2.432
6
2.435
2.437
7
2.440
2.442
8
2.445
2.447
9
2.450
2.452
10
2.455
2.457
11
2.460
2.462
12
2.465
P/N 857331 B Revised 6/30/15
