Manual revision 001
Section 3: Preparing SBE 39
plus
-IM for Deployment
SBE 39
plus
-IM
19
Power and Communications Test and Setting SBE 39plus-IM IDs –
Using IM Communications and Remote Inductive Modem Module (IMM)
The power and communications test will verify that the system works,
prior to deployment. This section covers use of the SBE 39
plus
-IM with an
Inductive Modem Module (IMM)
.
Test Setup with IMM
1.
Loop insulated wire through the 39
plus
-IM’s modem coupling core to
simulate a mooring cable. Place the other end of the loop through the
IMM test coupler (supplied with the IMM) or the ICC. Connect the wire
ends from the IMM test coupler or ICC to the IMM’s mooring cable
terminals (J1) (see IMM Manual).
2.
The 39
plus
-IM requires a minimum of 20 ohms impedance.
3.
Connect the IMM to your computer’s serial port and to a 7 – 24 VDC
power supply using the cable supplied with the IMM. A maximum of
15 mA is required.
Note:
Sea-Bird ships the 39
plus
-IM with
four AA lithium cells installed. See
Replacing AA Cells and Desiccant
in
Section 5: Routine Maintenance and
Calibration
to replace the cells.
Insulated wire looped
through modem
coupling core
Modem
coupling core
Loop wire through
IMM test coupler
(shown) or ICC
IMM
To computer serial port
and power supply
Note:
If more than one IM instrument is
on-line when you set the ID, all IM
instruments will be set to the same
ID.
The inductive modem receivers in
IM instruments are very sensitive;
two IM instruments that are side-by-
side will take the same ID, even if
one of them is not on the IM loop.
Therefore, separate IM instruments
by at least 2 meters when
setting IDs.
