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6 - Language Dictionary
82
To make an effective probe resistance measurement, there should be some significant current
through the probe contacts to the cells. The cfSetVoltage, cfSetCurrent, and cfSetOutputState
commands can be used to set up the proper conditions for this measurement. If the probe
resistance measurement cannot be made, either because the output for a cell is in the OFF state,
the voltage sense is set to Local, or if there is insufficient current flowing to make the
measurement, the special value CF_NOT_A_NUMBER (9.91E37) is returned.
cfMeasProbeContinuity
Syntax
int cfMeasProbeContinuity(CF_HANDLE server, int cell, CF_CONTINUITY
*result);
Description
NOTE: Because this command may take several seconds to complete, you may need to temporarily
adjust the cfSetTimeout function to account for the increased execution time.
This command checks the sense and output probe connections for a particular cell or for all cells.
The cell argument can be an individual cell number from 1 to 256, or the constant
CF_ALL_CELLS to request readings for all cells. If CF_ALL_CELLS is given, the result
argument should point to an array of size CF_MAX_CELLS that will receive the return values.
The value returned in result will be one of the following constant definitions:
CF_PROBES_OK
CF_SENSE_PROBE_OPEN
CF_OUTPUT_PROBE_OPEN
CF_PROBES_OPEN
CF_CANNOT_TEST
(either the unit is set to local sensing or a cell is inactive)
The Agilent MCCD must be configured for remote voltage sense and the probes must be
connected to a battery cell to do probe continuity testing. No tests are performed if local voltage
sense has been programmed.
cfMeasSenseProbeResistance
Syntax
int cfMeasSenseProbeResistance(CF_HANDLE server, int cell, float
*resistance);
Description
NOTE: Because this command may take several seconds to complete, you may need to temporarily
adjust the cfSetTimeout function to account for the increased execution time.
Measures and returns the resistance looking back into the sense probes for a particular cell or for
all cells. Data is returned ohms. The cell argument can be an individual cell number from 1 to
256, or the constant CF_ALL_CELLS to request readings for all cells. If CF_ALL_CELLS is
given, the resistance argument should point to an array of size CF_MAX_CELLS that will
receive the return values.
To make an effective probe resistance measurement, there should be a cell connected at the
output. The instrument cannot distinguish between resistance in the sense connections and output
resistance of the cell.