Deploying The Midas Wlr; Real Time Operation; Self Recording Operation; Led Flashing Sequence - Valeport MIDAS WLR Hardware Manual

3.2 DEPLOYING THE M
All parts of the standard system (with the exception of the top part of the 3m Y lead) are
designed for immersion. All communications adaptors (RS485, RS422, FSK) are
splash proof, but should be sited in a dry place, as close to the PC as possible.
The M WLR is supplied with a stainless steel protective cage, but care should still
IDAS
be taken not to damage the instrument. For profiling work, the recommended
deployment method is to suspend the instrument using the stainless steel wire strop
fixed to the top of the cage. For fixed deployments, the user may wish to remove the
cage, and use the grooves in the instrument housing as clamping points.
3.2.1

REAL TIME OPERATION

For real time data output, connect the signal cable to the 10 pin Subconn connector on
the instrument. All Valeport signal cables include a suspension point for strain relief,
and a similar arrangement is recommended for other cable types. Connect the top end
of the cable to a PC using the appropriate method as described above.
3.2.2

SELF RECORDING OPERATION

For self recording only deployments, the instrument is switched on by insertion of the
Subconn style switch plug. This plug must be inserted for the unit to operate.
Note that the switch plug is NOT just a dummy plug; it contains links between some of
the pins as described in Section 5, which are used to turn the instrument on.
3.2.3

LED FLASHING SEQUENCE

The M WLR is fitted with an LED visible through a polycarbonate window in the
IDAS
battery pack. The LED will flash as detailed below to indicate various states.
Continuous ON
for 15 seconds
1Hz Continual
Flashing
Continuous ON
for 2 seconds
5 Rapid Flashes
M WLR Hardware Manual
IDAS
WLR
IDAS
Occurs when the Switch Plug or cable is connected, indicating that
instrument is on and awaiting communication
Insufficient Power. Change internal batteries, or completely remove
external power, and apply higher voltage
Indicates the start of Burst Sampling pattern
Indicates the end of Burst Sampling pattern. The duration of the
burst may be calculated as the time between the start and stop LED
sequences, less 5 seconds.
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