The layout of the front panel is shown in Figure 3. The BB701 incorporates a PIDdigital setpoint controller. The upper display indicates the blackbody target platetemperature known as (PV) Process Variable, while the lower display indicatesthe programmed setpoint known as (SV) Setpoint Variable. Making changesto the setpoint, units can be made via the and keys. Holding a key in,continuously, will cause the setpoint temperature to advance more quickly toa desired value. Three scanning speeds are provided: slow, medium and fast.The minimum and maximum setpoints are locked at 0 and 300°F, respectively.While these max. and min. settings are changeable (see “Changing the InternalParameters,” Section 3.4), it is strongly advised not to adjust these parameters.