©2000 Xantrex Technology Inc.
Testpoints for Voltage Settings
At midrange on these scales, a testpoint is provided for use with a DC
digital voltmeter for assuring more accurate adjustment. The pots are equipped
with removable knobs to prevent accidental adjustments by the curious or
uninformed. If the knobs are missing, a 5/64" hex-head driver can be used to
adjust the settings. A digital voltmeter can be connected from the COMMON
NEGATIVE terminal on the circuit board and the small testpoint located to the left
of each adjustment pot at the nine oclock position. The testpoint provides a
reading from 0 to 2 volts; this value must be added to the lower value of the
adjustment range (Bulk=13.0, Float=12.5, LVR=12.0, LVD=10.5). Multiply this
value by 2 for 24 V and by 4 for 48 V.
For example, to set the bulk voltage to 14.4 volts, adjust the potentiometer
until the DVM displays 1.4 volts (13.0 V + 1.4 V = 14.4 V). To set bulk to 28.2,
adjust the pot until the DVM displays 1.10 volts (1.10 x 2 [24 volt] = 2.2 + 26.0 =
28.2). When using NiCad type batteries, add another 2 (12-volt), 4 (24-volt) or 8
(48-volts) to the settings.
If you are using the unit as a DC load controller, be sure to set the
potentiometers as shown in the
DC Load Control
section of this manual. The
upper knobs settings are reduced by 1 volt, resulting in a range of 14.0 VDC to
12.0 VDC (for a 12-volt system). The lower knobs settings are reduced by
2 volts, resulting a range of 12.5 to 10.5 VDC (for a 12-volt system).
3.0 INSTALLATION
28
Figure 18
DC Testpoints for Bulk and Float
Load Control Mode (sticker)
Figure 19
DC Load Control Adjustment Sticker
TESTPOINTS
for DC multimeter
(center legs of potentiometer)
Connect the negative lead of
DVM to the COMMON
NEGATIVE terminal
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