Campbell Scientific CR23X Micrologger - Manual (Page 228)

SECTION 14. INSTALLATION AND MAINTENANCE
14-2
TABLE 14.8-1. Typical Current Drain for Common CR23X Peripherals
Typical Current Drain (mA)
Peripheral Quiescent Active
AM25T .5 1
AM416 .1 17
COM100 .5 1.8
COM200 Phone Modem 0.0012 140
CSM1 .5 18
MD9 1.2 80
RAD Modem and SC932 Interface 2.2 10-15
RF100-VHF 5 Watt Radio 30 1700
RF200-UHF 4 Watt Radio 30 1500
RF95 RF Modem 1.4 30
SDM-A04 10.5 --
SDM-CD16 6.0 11/LED lit
SDM-INT8 0.4 6.5
SDM-SW8A 3 6
SM192/SM716 Storage Module 0.25 3
VS1 .05 110
14.2 POWER REQUIREMENTS
The CR23X operates at a nominal 12 VDC.
Below 11.0 V or above 16 volts the CR23X
does not operate properly.
The CR23X is diode protected against
accidental reversal of the positive and ground
leads from the battery. Input voltages in excess
of 18 V may damage the CR23X and/or power
supply. A transzorb provides transient
protection by limiting voltage at approximately
20 V.
System operating time for the batteries can be
determined by dividing the battery capacity (amp-
hours) by the average system current drain. The
CR23X typically draws 2.0 mA (2.5 mA
maximum) in the quiescent state (with display
off), 7.0 mA with display on, 45 mA while
processing, and 70 mA during an analog
measurement; the length of operating time for
each datalogger instruction is listed in Section 3.