SENS IQ Technical Manual
6
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I.
Verify battery voltage—
With the charger input AC and output DC breakers still opened
, close any
system battery disconnect, if used, and measure the battery voltage at the battery (left) side of the charger
DC output circuit breaker, making sure it is near the nominal DC voltage rating of the charger. See
TABLE
5
for typical values of open circuit battery voltage for most common battery configurations.
J.
Verify battery polarity—
With the DC output circuit breaker still opened
, close charger AC breaker to
start charger. The charger status display will come on and the charger will execute its initialization
routines. The charger output should ramp up to within 5% of battery voltage. It will not ramp up to the
float voltage setting until the DC circuit breaker is closed.
K.
Close the DC output breaker—Depending on the state of charge of the batteries and the load on the DC
bus, the charger may go into current limit at this time, in which case the output voltage as displayed on the
LCD will be reduced as the charger operates in constant current mode. Eventually as the battery is
charged, the charging current demand should taper to a value below the current limit set point of the
charger, and the charger should revert to constant voltage output.
L.
See Section 8.2 to initially charge/commission zero charge batteries.
M.
If Automatic or Equalize charging modes are desired press the
CHARGE MODE SELECT
button on the
front panel (see
FIG 4
for CHARGE MODE selection and Section 8.3 for description of available
charging modes). Set the
EQUALIZE TIME LIMIT
to the desired value (see Section 8.6.2).
N.
It is highly recommended that for proper operation of two chargers connected in parallel to the same
battery that one charger be equipped with a CommsGenius communications option and is connected to the
second charger with a digital load-sharing cable. See the CommsGenius User Manual available at
www.sens-usa.com for more information.
The digital load sharing cable should never be connected
when two chargers are each connected to different batteries.
NOTE:
If a beeping tone is heard at this time, the polarity of the battery
connection to the charger is incorrect. Turn off the AC power source and
correct the reverse polarity problem.
3 PERFORMANCE
SPECIFICATIONS
See IQ Product Data Sheet and Product Specification on SENS website (www.sens-usa.com) for detailed per-
formance specifications.
