The smallest possible reading as a signed integer. The value of this OID variable should be scaled by outletPoleSensorDecimalDigits. For example, if the value is 1 and outletPoleSensorDecimalDigits is 2, then actual value is 0.01. This value determines whether to use the signed or unsigned threshold and value columns: If the minimum is below zero the sensor can have negative readings and the signed columns should be used. This parameter does not apply to sensors without numerical reading.