13
RS85
VIBR ATING FORK LEVEL SWITCH | OI/RS85-EN REV. K
4 Time delay
The RS85 time delay option allows changing the time
response of the relay output, which is very useful in
applications with severe turbulence or agitation.
In typical applications, the RS85 in default settings will
activate the relays instantaneously when the switch point has
been reached. In certain applications it may be necessary to
delay the action of the relays in the switch. If this is desired, a
time delay for the relays can be set. To enter the time delay
setup mode, place the magnet on 'S1' (figure 26) or press
pushbutton S1 (figure 27) for more than 1 second but less
than 6 seconds. The following sequence of LED’s will be
observed:
While LED2 is lit RED, LED1 will blink the current time delay
setting per table 4.
Table 3 – Time delay adjustment
OPERATION
LED 1
LED 2
Normal
Green or red
Off
S1 for 1 – 6 sec
Off
Off
Displaying current time delay
'Green'
Red
Off
Off
S1 PER table 4
'Green'
Off
'_' – indicates a blinking LED
Table 4 – Time delay setting
LED1 Blinks
1
2
3
4
5
6
7
8
Seconds
0
5
10
15
20
25
30
35
After LED2 turns 'off', LED1 will blink in correspondence to the
different time delay settings per table 4. When the desired
time delay is reached, place the magnet on the 'S1' position
(see figure 26). The time delay will be set and the RS85 will
return to normal operation. If a time delay is not selected, the
RS85 will return to its current operating mode without
changing the current time delay setting. During normal
operation of the switch, if a time delay is selected, LED1 will
change color when the switch point has been reached. The
relays will respond after the elapsed time delay on both
energized and de–energized actions.
Figure 26
Figure 27
