Campbell Scientific CR3000 Micrologger - Manual (Page 64)

Section 5. System Overview
64
the use of the keyboard display is available in the sections Read More! To
implement custom menus, see CRBasic Editor Help for the DisplayMenu()
instruction.
CRBasic programming in the CR3000 facilitates creation of custom menus for the
integrated keyboard / display.
Figure Custom Menu Example
(p. 70)
shows windows from a simple custom menu
named DataView. DataView appears as the main menu on the keyboard display.
DataView has menu item Counter, and submenus PanelTemps, TCTemps and
System Menu. Counter allows selection of one of four values. Each submenu
displays two values from CR3000 memory. PanelTemps shows the CR3000
wiring-panel temperature at each scan, and the one-minute sample of panel
temperature. TCTemps displays two thermocouple temperatures.
,
Custom
Keyboard and Display Menus
(p. 510),
and Keyboard Display
(p. 69).
5.1.4 Power Requirements
Read More! See Power Sources
(p. 82).
The CR3000 operates from a power supply with voltage ranging from 9.6 to 16
Vdc, and is internally protected against accidental polarity reversal. The CR3000
has modest-input power requirements. In low-power applications, it can operate
for several months on non-rechargeable batteries. Power systems for longer-term
remote applications typically consist of a charging source, a charge controller, and
a rechargeable battery. When ac line power is available, an ac/ac or ac/dc wall
adapter, a charge controller, and a rechargeable battery can be used to construct a
UPS (uninterruptible power supply). Contact a Campbell Scientific applications
engineer for assistance in acquiring the items necessary to construct a UPS.
Applications with higher current requirements, such as satellite or cellular phone
communications, should be evaluated by means of a power budget with a
knowledge of the factors required by a robust power system. Contact a Campbell
Scientific applications engineer if assistance is required in evaluating power
supply requirements.
Common power devices are:
• Batteries
o Alkaline D-cell — 1.5 Vdc / cell
o Rechargeable lead-acid battery
• Charge sources
o Solar panels
o Wind generators
o Vac / Vac or Vac / Vdc wall adapters
Refer to the appendix Power Supplies
(p. 566)
for specific model numbers of
approved power supplies.
NOTE While the CR3000 has an input voltage range of 9.6 to 16 Vdc,
peripherals (telecommunications devices, sensors, etc.) connected to and powered
by the CR3000 may not have the same input voltage limits. For example, a sensor