MP SERIES™ Battery Backup System for Traffic Signals: MP2000E System
Volume One: Operating Manual
Page 7-16
Generally, charging depleted batteries in hot weather and while the MP2000 operates in boost
mode results in low VAC input conditions due to line loss.
The VAC input reading in the MP2000 LCD default display and Status menu is the reading on
which the MP2000 will act regards – switch to battery backup and buck / boost (AVR)
operation.
Use a calibrated, high quality, hand-held digital multi-meter (DMM) (battery powered, no VAC
cords to preclude isolation issues) to make external voltage measurements.
Check the MP2000 front panel test points during normal on-line operation for battery charge
voltage. The battery charge voltage will fluctuate around approximately 55VDC while
occasionally lowering to battery voltage checking for a “Battery Not Connected” condition.
7.f
Alignment Procedures
Set up the MP2000 to correspond to:
•
end equipment voltage requirements
•
battery OEM specifications
•
site specific criteria
7.f.1 Site Specific Criteria
Site specific criteria affecting alignment procedures include:
•
P
ROGRAMMABLE
I
NPUT
C
ONTACT
C
LOSURE
: (input to the MP2000 front panel terminal block).
Refer to the MP2000 LCD settings menu for contact closure input selection.
•
I
NTERSECTION
F
LASH
O
PERATION
:
typically the “battery low” contact closure is put to a
conflict monitor to initiate flash. See the MP2000 LCD settings menu contact closures
to set a battery level for battery runtime versus flash operation.
•
L
OAD
S
HED
: See the MP2000 LCD settings menu contact closures for timer load shed
functionality ( to extend battery runtime operation ).
•
G
ENERATOR
P
OWER
V
ERSUS
U
TILITY
P
OWER
: Generator power may be less voltage and
frequency stable than commercial power. See the MP2000 LCD settings – sense type
menu option.
•
S
ET
D
ATE
/
T
IME AND
D
AYLIGHT
S
AVINGS
T
IME
:
Typically MP2000 LCD settings menu date
and time are set for the time zone at the site. This is the date and time that appears in
the UPS log versus e.g. a network operating center (NOC) location that monitors
readings and alarms. Log date and time readings may be instrumental in resolving
extraneous anomalies and issues.