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Using LENS Wireless
Overview
LENS™ Wireless (Linked Equipment Network for Safety) is used to form wirelessly connected instrument
"groups". A LENS group can include Ventis Pro Series instruments, Radius™ BZ1 Area Monitors, or both.
Instruments that are connected through a LENS group are known as "peer instruments". Peer instruments
share alarms, allowing instrument operators to learn of nearby hazardous conditions and the identities* of
colleagues whose instruments are in alarm. LENS also allows instrument operators to view peer-instrument
gas readings on demand.
Instruments in a LENS group communicate in a nonlinear manner. With the location of units A through F as
shown below in Figure 5.5, messages can travel among instruments that may be separated by distance or
a structure (gray bar). The following also apply to Ventis Pro instruments that are in a LENS group:
To maintain membership in the group, use this guideline to assess potential signal reach: a line-of-sight
distance up to 100 m (109 yd) between two Ventis Pro instruments that are facing each other.
Check the home screen to assess the group's signal quality. From lowest to highest signal quality, the
symbols are: , , , and ..
If an instrument becomes separated from its group, its display screen will feature a "Group Lost"
message; its peer instruments, a "Peer Lost" message (if settings permit). When lost from its group, the
instrument will make multiple attempts over five minutes to rejoin the group.
Figure 5.5
LENS group peer-instrument locations
*Requires valid current user assignment; otherwise, the peer instrument's serial number or MAC address will display.
How to form, join, or leave a LENS Wireless group
Forming and joining a group
Among LENS-enabled instruments that have the LENS setting turned on, peer-instrument groups can be
formed or joined in the field in the ad hoc manner described below in Figure 5.6.
When an instrument is already in a LENS group, but tries to join another, the instrument will prompt its user
to confirm the change; otherwise, it will simply signal its user of the joining-attempt result.