9
54-610 Thermatel Model TD1/TD2 Flow Level Switch
5a.
High Level Applications
a. Set fail-safe switch to the “HL” position (switch up
).
b. Turn alarm potentiometer counterclockwise until red
LED turns on.
c. Turn alarm potentiometer clockwise until red LED
turns off.
d. Repeat steps b and c several times leaving the red LED
on.
e. Turn alarm potentiometer counterclockwise one
additional turn.
f. Remove from the liquid. The switch will reset.
g. Put back in liquid. If response time to detect level is too
long then turn one half turn counterclockwise and retest.
Turn alarm potentiometer counterclockwise for the switch to
respond quicker to detect level. Turn alarm potentiometer
clockwise to decrease time to detect dry condition.
5b.
Low Level applications
a. Set fail-safe switch to the “LL” position (switch
down
).
b. Turn alarm potentiometer counterclockwise until red
LED turns on.
c. Turn alarm potentiometer clockwise until red LED
turns off.
d. Repeat steps b and c several times leaving the red
LED off.
e. Turn alarm potentiometer clockwise
1
⁄
2
additional turn.
f. Remove from the liquid. If the response time to detect a
dry condition is too long, turn the alarm potentiometer
counterclockwise and retest.
5c. Interface applications
Follow either of the procedures above substituting the
oil (or low thermal conductive fluid) for the dry condi-
tion and water (or high thermal conductivity fluid) for
the wet condition.
6. The switch will typically detect level within 3 to 5 seconds
and detect a dry condition within 5 to 10 seconds. This
depends upon set point adjustment and type of sensor.
High Level Adjustment
(High Level Fail-safe)
for faster response to detect
a high level (wet) condition
Turn
Low Level Adjustment
(Low Level Fail-safe)
for faster response to detect
a low level (dry) condition
Turn
