1
LORD TECHNICAL NOTE
SG-Link
®
-LXRS
®
350 Ohm Tester Board
Overview
The 350 Ohm Tester Board (part number 6309-6000) provides a precise instrument to test
the differential input channel and the single ended input channel of the SG-Link
®
-LXRS
®
. It
can be used with any SG-Link
®
-LXRS
®
that has its differential input channel outfitted as full
bridge or ½ bridge with 350 ohm completion. The Tester Board is used in conjunction with
Node Commander
®
software.
Hardware Installation
Determine the bridge configuration of the SG-Link
®
-LXRS
®
by reviewing its
accompanying certificates and documentation.
Set the appropriate dip switch settings for the bridge configuration using the guide
(bottom of the Tester Board). For our example we will use a FULL bridge
configuration.
Set switches 1, 2 and 3 to ON and switch 4 to OFF. As you view
Figure 2, switches 1, 2 and 3 would be to the left and switch 4 would
be to the right.
Note: The dip switches may come with a brown protective film over
their surface; simply peel the film off to access the white levers.
Turn the SG-Link
®
-LXRS
®
power switch off and unplug the battery
charger barrel connector to insure the internal battery is not being
charged.
Loosen (by turning counterclockwise) the 8 terminal screws in the
green Phoenix connector on the SG-Link
®
-LXRS
®
.
Insert the 8 fingers of the Tester Board into the Phoenix connector
as shown in Figure 1.
Tighten snuggly (but do not over-tighten) the 8 terminal screws.
Turn the SG-Link
®
-LXRS
®
power switch on.
Software Operation
Launch Node Commander
®
software and establish communications with the SG-Link
®
-LXRS
®
as normal.
Right-click the node and a drop-down menu will appear.
Click Configure.
Click Configure Node and the Configuration window will appear.
Click the Channels tab.
Enable channels 1 and 4 by checking the checkboxes.
Click Apply.
Click the Configure button for channel 1.
The Configuration (Channel 1) window will appear.
Set the Hardware Gain to 503.
Set the Auto-Balance radio button to Midscale.
Click the Auto-Balance button.
An auto-balance will occur and a confirming message will appear.
Click OK.
Set the Conversion Coefficients to Strain and
μStrain will automatically fill in as Units.
Figure 1:
Tester Board
Figure 2:
Dip Switches