Campbell Scientific PS200/CH200 12 V Charging Regulators - Manual (Page 46)

PS200/CH200 12 V Charging Regulators
6.2.3.1 Write Remote Battery Temperature to PS200/CH200
aXTmm.dd! command overrides the internal temperature measurement, where
‘a’ is the PS200/CH200’s SDI-12 address and mm.dd refers to an ASCII string
of numerals with a decimal point of temperature in degrees Centigrade within
-40 and 100°C. This command overrides the PS200/CH200 internal
temperature measurement for 15 minutes or until canceled by a temperature
restore command. The temperature value is used in calculating the optimal
battery charge voltage.
See Appendix A.1.1, Write/Reset Remote Battery Temperature SDI12
Programming Example.
6.2.3.2 Restore Internal Battery Temperature Measurement
aXTR! Restore to internal PS200/CH200 battery temperature, where ‘a’ is the
SDI-12 address of the PS200/CH200.
Undo what was done with the XTmm.dd! command.
See Appendix A.1.1, Write/Reset Remote Battery Temperature SDI12
Programming Example.
6.2.3.3 Change Battery Capacity Value in PS200/CH200
aXCmm.d! Enter battery capacity, where ‘a’ is the PS200/CH200’s SDI-12
address and mm.d is ASCII representation of battery capacity in Ah.
To use the quicker dual rate charging scheme in the PS200/CH200 a value
other than zero must be entered into the battery capacity field. BUT! This
value needs to be the actual amp-hour capacity of the battery being used or the
charger will not charge correctly. This instruction allows the user to change
the battery capacity in the field if they find themselves swapping out batteries
with a different amp-hour capacity model.
See Appendix A.2.1, Change Battery Capacity SDI12 Programming Example,
for a programming example using this instruction.
6.2.3.4 Enter Battery Test State
aXB! Enter battery test state with 90 second time out, where ‘a’ is the SDI-12
address of the PS200/CH200.
Use this instruction to cause the system to run strictly on battery voltage and
test the battery for sulfation or other issues.
This command can be used in a datalogger program to test a battery connected
to a PS200/CH200. This command instructs a PS200/CH200 to set its
charging voltage to 11.5 VDC for 90 seconds. Generally, the battery voltage
will be greater than 11.5 VDC, so this command momentarily causes a
PS200/CH200 to stop charging the battery. Then, the datalogger program can
analyze the battery charging capacity (see example program). Because the
BATT_TEST command stays in effect for only 90 seconds, the datalogger
program must issue the BATT_TEST command more frequently than once per
90 seconds for as long as the test is to last.
See Appendix A.3.1, Enter Battery Test State SDI12 Programming Example,
for a programming example using this instruction.
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