Specifications

Section 1. Installation and Maintenance
1-7
1. A CR3000 equipped with standard lead acid batteries should NEVER be
used in applications requiring INTRINSICALLY SAFE equipment.
2. A lead acid battery should not be housed in a gas-tight enclosure.
1.3.3 CR3000 Low Profile Base (Part Number 10695)
The low profile CR3000 option is not supplied with a battery base. In this
configuration, the user supplies power to the CR3000 by attaching an external
12V power source to the Power In plug on the lower left of the CR3000 wiring
panel. Campbell Scientific supplies three external power supplies that would
work with the low profile configuration, the BPALK, PS100, and CH100.
1.3.3.1 BPALK Alkaline Power Supply
The BPALK uses 8 alkaline D cells and comes with an AA cell battery pack to
supply power while replacing the D cells. The 4 AA batteries are not included.
To replace the batteries without stopping the datalogger program, 1) connect
the external battery to the port labeled temporary, 2) remove the old batteries,
3) replace with new alkaline D cell batteries, and 4) remove the external
battery.
A fresh set of eight alkaline D cells has 12.4 volts and a nominal rating of 7.5
amp-hours at 20°C. The amp-hour rating decreases with temperature as shown
in Table 1.3-1. The CRBasic Battery instruction can be used to monitor
battery voltage (see section 7.6). Replace the alkaline cells before the CR3000
battery voltage drops below 11 V.
Panasonic
A
AM-3 1.5V
Panasonic
A
AM-3 1.5V
INTERNAL BATTERY
MADE IN USA
12V ALKALINE BATTERY PACK
BPALK
A
A
M
-3 1.5
V
Panasonic
A
A
M
-3
1
.5V
Panasonic
Panasonic
A
A
M
-3
1
.5
V
Panasonic
A
M
-
3
1
.5
V
A
Logan, Utah
TEMPORARY BATTERY
FIGURE 1.3-3. BPALK Power Supply