Instruction Manual
Microwave 328-24 Series
Non-Contact Point Level
System
HiTECH Technologies, Inc.
301 Oxford Valley Road, Bldg 505
Yardley, PA 19067-7711 USA
Tel: 215. 321. 6012 Fax: 215.321. 6067
www.hitechtech.com info@hitechtech.com
Wiring
Calibration
Transmitter
After installation is complete, adjust the following with the sensor in
the UNBLOCK state.
Receiver
Transmitter
De-energized
1 2 3
• After supplying 24 VDC, the POWER light (Green) will come on.
Receiver
1 2 3 4 5 6
• After supplying 24 VDC, either the red BLOCKED LED light
or the green UNBLOCKED light will come on.
NC COM NO
+
-
+
Ground
Power supply 24 VDC.
-
Ground
• Turn mode selection switch A to BLOCK, turn the sensitivity
switch S to L and turn the time delay potentiometer T fully counterclockwise (minimum).
Power supply 24 VDC.
Selection of detection mode and relay configuration.
Beam broken
BLOCKED
Detection mode
• Set the sensitivity potentiometer S to minimum.
Beam unbroken
UNBLOCKED
Terminal number
4&5
5&6
4&5
5&6
Unpowered state
Closed
Open
Closed
Open
Non-detecting
state
Open
Closed
Closed
Open
Detecting state
Closed
Open
Open
Closed
Powered
state
Function of receiver switches and potentiometers
S
SENSITIVITY
H
L
C
A
UNBLOCK
BLOCK
T
F
DELAY
ON
OFF
1 2 3 4 5 6
Description
Part Name
A
T
O
F
S
C
W
O
W
Time delay adjustment
BLOCK: Outputs on broken beam
UNBLOCK: Outputs on unbroken beam
0.1 - 10 sec. delay after state changes
Output indicator
ON (red) : Illuminates on output
Output indicator
OFF (green) : Illuminates on no output
Sensitivity switch
H:High L:Low
Mode selection switch
Sensitivity potentiometer To adjust sensitivity
Terminals
• The red LED output indicator ON O will come on.
• Slowly turn the sensitivity potentiometer C clockwise until the green
output indicator OFF F comes on.
This is to determine the actuation point. If this sensitivity setting
is very high (more than 7 on the potentiometer switch the sensitivity
switch S to H and repeat the above procedure.
• For applications involving mainly paper and/or where there is
little accumulation on the sensing head, increment the
potentiometer S by 1 or 2 levels only.
On the other hand, where the application involves material with a
moderately high water content, i.e. wet garbage etc, then the
potentiometer should be incremented by 3-4 steps.
However, if the object to be detected absorbs microwaves well,
(i.e. coal), then the rpotentiometer S can be incremented by more
than 5 steps.
• For an application where material is introduced from above,
a suitable "delay" time must be provided to to avoid
instantaneous detection of the falling material.
• To use UNBLOCK output mode, switch the mode selection
switch A to UNBLOCK.