Digital Pressure Indicator EV-120

The EV-120 is a digital pressure indicator, designed for use in conjunction with a KELLER Series 30 transmitter. Together, these two instruments build a highly precise pressure measuring device. The EV-120 interrogates the Series 30 transmitter and updates the display two times every second. The display shows after turn-on the full-scale pressure range of the transmitter and then the actual pressure reading. No manual adjustments are required; the EV-120 automatically configures itself to any Series 30 transmitter. Because the pressure is communicated and read in digital format, there are no signal conversion errors. The Series 30 transmitters are based on a microprocessor (µP) circuit. The sensor signals are digitized, numerically compensated in the µP and again converted by the D/A converter into an analog norm signal (0...10V or 4...20 mA). The EV-120 reads out the compensated digital pressure value.

Accuracy	See specifications of KELLER's Series 30 transmitters
Storage - / Operating temperature	-20...60°C / 0...50°C
Compensated temperature range	See specifications Series 30
Protection	IP40