A thermocouple data logger has a built-in circuit to compensate for the temperature of the connecting board which is used for mounting the thermocouples. A test is to be performed on the circuit by measuring the temperature of the board and the compensating voltage generated internally. If the temperature of the board is measured as 50?F, what should be the compensating voltage, and to what tolerance should it be maintained so that the compensation is accurate within ±0.2?F? Assume iron-constantan thermocouple.