Campbell CH201, Product Manual

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If multiple SDI-12 devices are connected to a data logger, Campbell Scientific recommends using
separate terminals when possible. However, multiple SDI-12 devices can connect to the same
data logger control or U terminal. Each must have a unique SDI-12 address. Valid addresses are 0
through 9, a through z, and A through Z. The CH201 has a default SDI-12 address of 0. The SDI-12
address can be changed by using Device Configuration Utility or an SDI-12 command (
aAb! ).
For the CR6 and CR1000X data loggers, triggering conflicts may occur when a companion
terminal is used for a triggering instruction such as
TimerInput()
,
PulseCount()
, or
WaitDigTrig()
. For example, if the CH201 is connected to C3 on a CR1000X, C4 cannot be
used in the TimerInput() , PulseCount() , or WaitDigTrig() instructions.
7.3.1.1 SDI-12 commands
Table 7-3: SDI-12 commands and responses
SDI-12 command
1
Values returned
aM!
,
aMC!
1. Battery voltage
2. Battery current
3. Load current
4. DC In 1 voltage
5. DC In 2 voltage
6. Temperature
7. Charge state
8. Charge source
9. Check battery
aM1!
,
aMC1!
1. Charge state
2. charge source
3. check battery
aM2!
,
aMC2!
1. Target battery voltage
2. Input voltage at maximum
3. Battery capacity, Qloss
1
a is the sensor address.
CH201 12V Charging Regulator 24