Burkert Type 1078-2 - Manual (Page 8)

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For example:
The time range for t
on
is set to 5-100 seconds and the
time range for t
off
is set to 1,5-30 minutes.

If t
on
= 50 seconds = min. value of the range (5 s)
+ 45 s (45/95*100 = 47 % of the range), set the
cursor of the t
on
potentiometer as follows:
t
on
= min. value of the range + 47 % of the time range
1 3

If t
off
= 20 seconds = min. value of the range (1,5
min.) + 18,5 min. (18,5/28,5*100 = 65 % of the
range), set the cursor of the t
off
potentiometer as
follows:
1 3
t
ooff
= min. value of the range + 65 % of
the time range
Fig. 11: Setting example of potentiometers t
on
and t
off
of
the 1078-1
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9.3. Adjustment of the 1078-2
To change the parameters of the 1078-2, install a configu-
ration module type 1077-2 on the timer 1078-2.

Switch off the power supply of the 1078-2 in order not
to damage the current 1078-2 settings.

Check that both red LEDs are OFF.

Loosen the screw from the 1078-2.

Remove the cover.

Install the 1077-2 with its seal onto the 1078-2, in any
position. See Fig. 6, page 21.

Insert the screw supplied with the 1077-2.

Tighten the screw at a torque rating between 0,5 and
0,8 Nm.
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9.3.1. Adjustment keys of the 1077-2
+ To access the Settings level.
• From the Read level to go to the next time.
• From the Settings level to go to the next
function.
• To validate the setting of each function.
• At the end of the adjustment, to transfer the
new settings to the timer.
At the Settings level:
• To change the flashing numerical value.
• To go to the next choice of a function.
Fig. 12: Adjustment of the 1077-2
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9.3.2. Display elements of the 1077-2
h m s
199:99
Time units for the displayed time:
hours, minutes and/or seconds
- At the Read level:
Shows that the output is
closed
- At the Settings level:
Shows that the ON/OFF
contact is normally open
Setting for the reset
input
Shows a time. If "--:--"
is displayed the set
cycle is completed.
Shows that the device
is beeing adjusted
Shows the operating
mode
- At the Read level:
Shows that the output
is open
- At the Settings level:
Shows that the ON/OFF
contact is normally closed
Fig. 13: Display of the 1077-2
9.3.3. Operating levels
The configuration module has two operating levels: The
Read level and the Settings level.
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