The SZP-73 is manufactured by Simex, and is a current test set that permits creating user-defined current with 4 to 20 mA range. It has an LED display in two color with IP 65 version.
The unit has measurement range of -999 ÷ 9999 plus decimal point, and stability of type 50 ppm/°C. The unit can operate at standard temperature of 0°C ÷ +50°C.