ECHOTEL Model 961 offers the ultimate solution to reliable single-point liquid level measurement. This advanced switch uses pulsed signal technology for superior performance in difficult process conditions, and to provide excellent immunity from sources of electrical noise interference. Extensive self-testing of the electronics and transducer make this advanced switch suitable for use in Safety Integrity Level (SIL) 2 loops.
The ECHOTEL Model 961 is equipped with advanced diagnostics that continuously check the sensor and electronics. The diagnostics also alarm for electrical noise interference from external sources.
ELECTRONICS SPECIFICATIONS
MODEL 961/962 WITH RELAY OUTPUT
Supply Voltage 102 to 265 VAC, or 18 to 32 VDC
Relay Outputs 961: One DPDT level relay and one SPDT malfunction relay
962: Two SPDT level relays and one SPDT malfunction relay
Relay Ratings DPDT: 5 amps @ 120 VAC, 250 VAC, and 30 VDC, 0.15 amp @ 125 VDC
SPDT: 5 amps @ 120 VAC, 250 VAC, and 30 VDC, 0.15 amp @ 125 VDC
Fail-safe Selectable for high or low level
Power Consumption 961/962: Less than 3 watts
Ambient Temperature -40° to +160° F (-40° to +71° C)
MODEL 961/962 WITH CURRENT SHIFT OUTPUT
Supply Voltage 11 to 35 VDC
Current Shift Output Normal Operation: 8 mA
Level Alarm Condition: 16 mA
Malfunction: 3.6 mA or 22 mA selectable
Loop Resistance 104 ohms with 11 VDC input, 1100 ohms with 35 VDC input
Fail-safe Selectable for high or low level
Power Consumption 961/962 Less than 1 watt
Ambient Temperature -40° to +160° F (-40° to +71° C)