
Section 1. Installation and Maintenance
1-5
Monitor the power supply voltage using the datalogger Battery instruction.
Incorporate this instruction into your data acquisition programs to keep track
of the state of the power supply. If the system voltage level consistently
decreases through time, some element(s) of the charging system has failed.
The Battery instruction measures the voltage at the Power In terminals, not the
voltage of the lead acid battery. External power sources must be disconnected
from the CR800 and charging circuit in order to measure the actual lead acid
battery voltage.
TABLE 1.3-2. PS100, Battery, and AC Transformer Specifications
Input Voltage (CHG terminals)
15 to 28 VDC or 18 VAC RMS
Battery Connections
Charging Output Voltage: Temperature compensated float
charge for 12 V Battery
Temperature Compensation Range: -40 to +60ºC
Charging Current Limit: 1.2 Amps typical
Power Out (+12 terminals)
Voltage: Unregulated 12 V from Battery
Current Limited w / 3 A Thermal Fuse:
> 3 A @ < 20°C
3 A @ 20°C
2.1A @ 50°C
1.8 A @ 60°C
Batteries
Operating Temperature Range: -40 to +60ºC
Capacity:
PS100 7 Amp hours
BP12 12 Amp hours
BP24 24 Amp hours
AC Transformer: CSI Model No. 9591
Input Voltage: 120 VAC
Output Voltage: 18 VAC RMS
Output Current (max): 1.2 Amps RMS
Protection (automatic reset):
85°C thermal reset breaker
UL Approval: UL-1950
AC Transformer: CSI Model No. 14014
Input Voltage: 90 - 264 VAC; 47 - 63 Hz
Output Voltage: 18 VDC
Output Current (max): 1.3 Amps
UL Approved, File No.: E137895
There are inherent hazards associated with the use of sealed lead acid batteries.
Under normal operation, lead acid batteries generate a small amount of
hydrogen gas. This gaseous by-product is generally insignificant because the
hydrogen dissipates naturally before build-up to an explosive level (4%)
occurs. However, if the batteries are shorted or overcharging takes place,
hydrogen gas may be generated at a rate sufficient to create a hazard.
Campbell Scientific makes the following recommendations:
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