Campbell Scientific CR510 Basic Datalogger - Manual (Page 163)

14-1
SECTION 14. INSTALLATION AND MAINTENANCE
14.1 PROTECTION FROM THE
ENVIRONMENT
The normal environmental variables of concern
are temperature and moisture. The standard
CR510 is designed to operate reliably from -25
°
to +50
°
C (-55
°
to +85
°
C, optional). Internal
moisture damage is reduced with a water
resistant conformal coating on the current
board. Extra desiccant should also be placed in
the enclosure to prevent corrosion.
Campbell Scientific offers fiberglass enclosures
for housing a CR510 and peripherals. The
enclosures are classified as NEMA 4X (water-
tight, dust-tight, corrosion-resistant, indoor and
outdoor use). A 1.25" diameter entry/exit port is
located at the bottom of the enclosure for routing
cables and wires. The enclosure door can be
fastened with the hasp for easy access, or with
the two supplied screws for more permanent
applications. The white plastic inserts at the
corners of the enclosure must be removed to
insert the screws. The enclosures are white for
reflecting solar radiation, thus reducing the
internal enclosure temperature.
The Model ENC 12/14 fiberglass enclosure
houses the CR510, power supply, and one or
more peripherals. Inside dimensions of the
ENC 12/14 are 14" x 12" x 5.5", outside
dimensions are 18" x 13.5" x 8.13" (with
brackets); weight is 11.16 lbs.
The Model ENC 16/18 fiberglass enclosure
houses the CR510, power supply, and several
peripherals. Inside dimensions of the ENC
16/18 are 16" x 18" x 9", outside dimensions
are 21.75" x 20.0" x 11.0" (with brackets);
weight is 17.2 lbs.
14.2 POWER REQUIREMENTS
The CR510 operates at a nominal 12 VDC.
Below 9.6 or above 18 volts the CR510 does
not operate properly.
The CR510 is diode protected against
accidental reversal of the positive and ground
leads from the battery. Prolonged input
voltages in excess of 18 V may damage the
CR510 and/or power supply. A transzorb
provides transient protection by limiting voltage
at approximately 20 V.
CAUTION: The metal surfaces of the
Terminal Strip and mounting bracket are at
the same electrical ground as the power
supply. Caution must be exercised when
connecting power directly to the Terminal
Strip's 12 V and ground terminals. Connect
the plus (+) side of the supply first, keeping
the minus (-) side away from the Terminal
Strip. Once the plus side is secured, connect
the power return.
TABLE 14.2-1. Typical Current Drain for Common CR510 Peripherals
Typical Current Drain (mA)
Peripheral Quiescent Active
RF100 VHF 5 Watt Radio 30 1730
RF200 UHF 4 Watt Radio 30 1530
RF95 RF Modem 1.4 30
SM192/SM716 Storage Module 0.25 3
CSM1 Card Storage Module 0.5 18
CR10KD Keyboard/Display <1 0.3 (
∗
6 Mode)
DC112 Phone Modem <1 45
COM200 Phone Modem 0.0012 140
COM100 Cellular Phone 0.5 1.8
VS1 Voice Phone Modem 0.05 75 (Data)/110 (Voice)
MD9 Multidrop Interface 1.2 17 (80 if drives network)
SRM-6A RS232 DCE Interface 2.2 15