Campbell CR1000 User Manual

Section 7. Installation
When programmed as an SDI-12 sensor, the CR1000 will respond to SDI-12
commands M, MC, C, CC, R, RC, V, ?, and I. See table SDI-12 Commands for
Transparent Mode
(p. 269) for full command syntax. The following rules apply:
1. A CR1000 can be assigned only one SDI-12 address per SDI-12 port. For
example, a CR1000 will not respond to both 0M! AND 1M! on SDI-12 port
C1. However, different SDI-12 ports can have unique SDI-12 addresses. Use
a separate SlowSequence for each SDI-12 port configured as a sensor.
2. The CR1000 will handle additional measurement (aMx!) commands. When an
SDI-12 recorder issues aMx! commands as shown in CRBasic example SDI-
12 Sensor Setup
(p. 280), measurement results are returned as listed in table SDI-
12 Sensor Setup — Results
(p. 280).
CRBasic Example 58. SDI-12 Sensor Setup
'This program example demonstrates the use of the SDI12SensorSetup()/SDI12SensorResponse()
'instruction pair to program the CR1000 to emulate an SDI-12 sensor. A common use of this
'feature is the transfer of data from the CR1000 to SDI-12 compatible instruments, including
'other Campbell Scientific dataloggers, over a single-wire interface (SDI-12 port to
'SDI-12 port). The recording datalogger simply requests the data using the aD0! command.
Public PanelTemp
Public Batt_volt
Public SDI_Source(10)
BeginProg
Scan(5,Sec,0,0)
PanelTemp(PanelTemp,250)
Battery(batt_volt)
SDI_Source(1) = PanelTemp 'temperature, degrees C
SDI_Source(2) = batt_volt 'primary power, volts dc
SDI_Source(3) = PanelTemp * 1.8 + 32 'temperature, degrees F
SDI_Source(4) = batt_volt 'primary power, volts dc
SDI_Source(5) = PanelTemp 'temperature, degrees C
SDI_Source(6) = batt_volt * 1000 'primary power, millivolts dc
SDI_Source(7) = PanelTemp * 1.8 + 32 'temperature in degrees F
SDI_Source(8) = batt_volt * 1000 'primary power, millivolts dc
SDI_Source(9) = Status.SerialNumber 'serial number
SDI_Source(10) = Status.LithiumBattery 'data backup battery, V
NextScan
SlowSequence
Do
SDI12SensorSetup(10,1,0,1)
Delay(1,500,mSec)
SDI12SensorResponse(SDI_Source)
Loop
EndSequence
EndProg
280

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