Maintenance And Periodic Inspections; Indication Of Response Time; Indications And Alarms - gefran KS Series Manual

of less than 30 m.
Periodic maintenance to carry-out in order to guarantee the justified exclusion of failures are:
- Visual inspection of the status of the electrical and mechanical connections.
The maintenance is designed to evaluate possible problems due to situations of incorrect mounting endured over time
or particular aggressiveness of the material processed.
Frequency: every two years
Check obstruction of the channel under pressure
- The maintenance has the purpose to verify that there are no occlusion of the pressure channel, which would lead to
malfunctioning.
The inspection is visual, after removing the probe from the process seat.
Frequency: every year.
Testing the sensor calibration
- The test is intended to check the correctness of the transduction curve of the sensor. It's done by applying known
pressure points to the transducer and checking the output values of the probe.
Frequency: every four years.
The response time to the pressure transduction is equal to 1 ms
The KS Series pressure sensors in the case of some specific anomalies provide output saturation (positive HIGH or
negative LOW).
The table 1 indicates the detected failures, their effect on the electrical output, and the recovery mode of the device.
Table 1: failures, effects on the outputs
Failure
Power supply cable broken
Sensor not connected
Power supply broken
Broken bridge
85194D_MAN_Electrical Installation for Probes_KS and KS-SIL2 Series_11-2021_ENG

5.3 Maintenance and periodic inspections

5.4 Indication of response time

5.5 Indications and alarms

Current output
LOW < 3.8mA
LOW < 3.8mA
LOW < 3.8mA
*LOW < 3.8mA
*HIGH > 22mA
Voltage output
FS<= 6V FS > 6V
LOW < 0.05 V
LOW < 0.05 V
LOW < 0.05 V
*LOW < 0.05 V
*HIGH > 7 V *HIGH > 11.5 V
7