11
Single block:
When single locking is selected, the system has two test
signals connected to the instrument, among which there must be a single alarm,
and either single locking 1 or single locking 2 can be selected. At this time, the
system tests two signals at the same time.
Double locking:
When double locking is selected, three signals must be
connected to the system at the same time, and the system tests three signals
at the same time.
Click "OK" to enter the density relay test interface.
Click "return" to return to the previous interface.
The test interface of density relay is shown in Figure 5. There are six
groups of values on the interface, including alarm reply value, alarm value, lock
reply value 1, lock reply value 1, lock reply value 2 and lock value 2. According
to the set test times and signal type test results, they will be displayed
correspondingly. PT is the normal temperature pressure value and P20 is the
equivalent pressure value converted to 20
℃
.
Figure 5
After confirming that the external air circuit is ready, click "start", and the
system will start testing according to the previously set parameters.During the
detection process, there will be a sound of opening or closing the solenoid
valve. When the pressure is increased to the preset upper limit pressure value,
there will be a short and rapid air release sound on the vent pipe when the
pressure is reduced. The corresponding test results will be successively