412440-s:calibration source checker

easy to use pocket checker for simulating current loops

features

• pocket checkers are easy to use and provide a quick and easy way for checking calibration of meters or controllers
• instantly determine if your device needs calibration or if sensor needs to be replaced
• 0.1ma accuracy
• current: 4ma, 12ma and 20ma; overload indication when load exceeds 240ohm
• complete with calibration cable and 9v battery