The LDT-5900 Series Temperature Controllers consists of two family members, the LDT-5948 60W Precision Temperature Controller and the LDT-5980 120W High Power Temperature Controller. These instruments are bi-directional current sources with precision measurement circuits to monitor and control the temperature of the device under test. They have the following operating characteristics: • PWM (pulse width modulated) output power of 60 W for the LDT-5948;(5A @ 12V DC) and 120 W for the LDT-5980 (10A @ 12V DC) • 0.001 oC set point resolution • 0.005 oC stability • Constant temperature, constant current, constant resistance and constant voltage control modes • Compatible with thermistors, IC and RTD temperature sensors • Four-wire sensor measurements • Four-wire TEC voltage measurement • AC resistance measurement • Heating and cooling temperature and current limits • Software controlled PID feedback loop control • PID Autotune mode • IEEE GPIB and RS-232 remote interfaces • Programmable triggers • Closed case calibration