page 16
Panel Layout
DS-1000 Operating Manual
PV Test Lead Connector
When an I-V curve is taken, the load current flows through the test lead into DS-
Tracer. The red and black test clips go to PV array positive and negative
terminals respectively. The test cable contains separate voltage sense wires to
measure the PV voltage at the test clips. This 4-wire measurement technique
avoids measurement errors caused by voltage drops in the test leads.
For maximum safety, the DS-Tracer should be connected through a PV system
disconnect rated at the PV system V
oc
and I
sc
values. See Figure 8. A system
disconnect switch provides a way to break the electrical connection should the
DS-Tracer have a major internal failure.
Figure 8. Use of PV system disconnect switch.
AC Power Entry & Fuse
Connecting the DS-Tracer to an AC power source recharges the DS-Tracer
battery. It is not necessary for the tracer to be on. Refer to section “Battery
Charging and Care” in section “4.0 Maintenance” for details of battery charging.
DS-Tracer
PV Array
System
Disconnect
Switch
Test Lead
