Campbell CR1000 User Manual

Section 7. Installation
Figure 33. Schematic of Grounds
7.6.1.1 Lightning Protection
Reading List:
• ESD Protection (p. 105)
• Lightening Protection (p. 107)
The most common and destructive ESDs are primary and secondary lightning
strikes. Primary lightning strikes hit instrumentation directly. Secondary strikes
induce voltage in power lines or wires connected to instrumentation. While
elaborate, expensive, and nearly infallible lightning protection systems are on the
market, Campbell Scientific, for many years, has employed a simple and
inexpensive design that protects most systems in most circumstances. The system
employs a lightening rod, metal mast, heavy-gage ground wire, and ground rod to
direct damaging current away from the CR1000. This system, however, not
infallible. Figure Lightning-Protection Scheme
(p. 108) is a drawing of a typical
application of the system.
107

Campbell CR1000 Specifications

General

Power Requirements	9.6 to 16 VDC
Data Logger Operating System	CRBasic
Memory	4 MB
Analog Inputs	16 single-ended or 8 differential
Analog Input Resolution	13 bits
Analog Input Range	+/-2.5V
Digital I/O	8
Pulse Counters	2
Communication Ports	RS-232
Operating Temperature	-25°C to +50°C
Pulse Channels	4