User`s guide

Installation - 3
33
The default setting for the open sense lead protection circuit is disabled or OFF. This is because
applications that apply an external voltage to the output or that use external disconnect relays may
interfere with the operation of the open sense detect circuit. If you are using external voltages or relays,
you can enable the open sense detect at the beginning of the test procedure. Make sure that the external
voltage is disabled and that any relays are in the closed position. Perform the remote sense check by
cycling the output off, then on. Then disable the open sense detect circuit and continue using the unit.
To enable open sense lead detection from the front panel, press the
Output key, use p to scroll to
SENS:PROT, press
ä
ää
ä to select ON, then press Enter. To have the unit turn on with open sense detection
enabled, save this state in location 0 and set the power-on state to RCL 0.
Figure 3-5. Output Voltage vs. Programmed Voltage with Open Sense Connection
0
1
2
3
4
5
6
7
8
9
10
11
PROGRAMMED VOLTAGE
ACTUAL OUTPUT VOLTAGE
+
S OPE
N
-
S
O
P
E
N
BOTH SE
NS
E LE
A
DS CONNECTE
D
12
13
14
15
16
17
18
19
123456789101112131415
B
O
T
H
+
A
N
D
-
S
E
N
S
E
L
E
A
D
S
O
P
E
N
Values will increase by about
+0.3 V under load conditions
Values will decrease by about
-0.1 V under load conditions