Campbell Scientific CR9000X Measurement and Control System - Manual (Page 66)

Section 1. Installation
TABLE 1.2-1. CR9000X Battery and Charging Circuitry Specifications
CR9000X WITH STANDARD BATTERIES (4):
Battery life, no supplemental
charge
13 hours to 10.5 V (assuming 1A current)
Voltage at full discharge 10.5 volts
Recharge time
(AC Adapter input) 9 hours from 100% discharge
5 hours from 50% discharge.
Individual Batteries
Type Yuasa
NP7-6
Nominal Voltage 6 Volts
Nominal Capacity 20 hr rate of 350 mA to 5.25 V, 7 Ahr
10 hr rate of 650 mA to 5.25 V, 6.5 Ahr
Operating Temperature range:
Charge –15 to 50 ºC
Discharge –20 to 60 ºC
Shelf Life @ 20 ºC:
1 month 97%
3 months 91%
6 months 85%
Life Expectancy:
Standby 3 to 5 years
Cycle use
100% depth of discharge 250 cycles
50% depth of discharge 550 cycles
30% depth of discharge 1200 cycles
Number of batteries 4
CHARGING CIRCUIT
Type Controlled voltage with temperature
compensated voltage regulation
Charging Current limited to 2 Amps max
POWER SUPPLY TRANSFORMER
Input Voltage
100-240 VAC,
50-60 Hz
Input Current 1.4 A maximum
Output Voltage 17.5 VDC
Output Current 3.5 A maximum
At typical CR9000X current demand, the batteries are 100%
discharged at a system battery voltage of 10.5 V. Discharging
the batteries below this voltage damages the cells. As can be
seen from the above table, battery life expectancy decreases with
depth of discharge. NOTE
CSI'S WARRANTY DOES NOT COVER BATTERIES .
Avoid deep discharge states by measuring and monitoring the battery voltage
(BattVolt instruction) as part of the collected data and periodically checking
the voltage record to be sure the batteries and charging system are working
correctly.
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