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MAN - BBR3 - REV: Original | E. Operation
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Digital Outputs 1 and 2
Raw values out of the system. Use a voltmeter to test the state at the output pin and verify that it matches the value
shown on the diagnostics screen. DO1 is the valve to switch between contact and test loads. DO2 is pulsed by the
program to control the bath stirrer.
Digital Outputs 3 and 4
High speed pulse outputs. Use a scope to test the output pin and verify that it matches the frequency and duty cycle
entered in the diagnostics screen. DO3 is not used in the current BBR3, DO4 is used to control the bath heater.
Cool PID Values
If you have mechanical cooling you will see the “Cool PID” values, which set the PID information for each range of the
mechanical chiller.
WARNING: These values have been set at the factory by Applied Test Systems and SHOULD NOT
BE CHANGED without consulting with the Applied Test Systems Service Department.
The Cool PID values are as follows:
• T sets the temperature for that set of values.
• P is the proportional gain of this set of values.
• I is the integral time of this set of parameters.
• D is the derivative time of this set of parameters.
•
IO is the integral offset of this set of parameters.
For more information and further understanding concerning the temperature controller in the BBR3’s chiller, refer to
the separate chiller manual that accompanies it.