HITROL HTM-930 User manual

Doc. no. :HTM-930 M_Kor_2016, Rev. 0
Issued date : 2016. 01
Page 1 / 7
HITROL CO., LTD.
HEAD OFFICE.FACTORY.R&D INSTITUDE
HITROL CO.,LTD 141, Palhakgol-gil, Jori-eup
Paju-si, Gyeonggi-do, Korea
TEL. : [phone]
FAX. : [phone]
www.hitrol.com
INSTRUCTION MANUAL
VIBRATION TYPE LEVEL SWITCHES
HTM-930 Series

Doc. no. :HTM-930 M_Kor_2016, Rev. 0
Issued date : 2016. 01
Page 2 / 7
Table of Contents
1. Features …………………………………………………………………………………………………….... 3
2. Specifications ….………………………………………………………………………………………….. 3
3. Operating Principle ……………………………………………………………………………………. 4
4. Dimensions …………………………………………………………………………………………………. 3
5. Installation Method ……………………………………………………………………………………. 4
6. Wiring Method …………………………………………………………………………………….......... 4
7. Maintenance ……………………………………………………………………………………………….. 5

Doc. no. :HTM-930 M_Kor_2016, Rev. 0
Issued date : 2016. 01
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1. Features
 Can detect level of various solids and powders
 Can be fully operated for powders of low and high densities.
 Can detect the intrface of sediments in the liquid.
 Has a longer lifetime since it has no mechanical movements.
 Does not need adjustments after installation.
2. Specifications
Body Steel (SS41)
Protection IP65
Range of Environment Temp. -20°C ~ + 60°C
Mounting Material Stainless Steel (SUS 304)
Mounting Specification 3/4" PT (KSB0222)
Operating Temp.(Inside Vessel) -20°C ~ + 250°C
Max. Pressure 10 kgf/cm2
Combination Unit HLC-901
Power Supply AC 110 V / 220 V 60 Hz± 10%
Power Consumption Approx. 5 VA
Sensitivity Over 0.2(Specific Gravity)
Max. AC 250 V, 5 A
Relay Output Max. DC 28 V, 5 A
(Relay 1 SPDT)
When relay is on.
Indication of Switch When detection LED is off.
When detection LED becomes RED.
Painting Metallic silver
Distance Between Sensor and unit Max. 300 m
Cable twisted paired cable
3. Operating Principle
HITROL’s HTM is an innovative, multipurpose switch and has the simplest structure.
HTM sensor head is composed of one module which has an oscillating coil generating frequency
and a sensing coil detecting oscillation.
When the material inside the vessel does not exist around the sensing rod, the sensing rod
continuously vibrates due to the oscillating coil.

Doc. no. :HTM-930 M_Kor_2016, Rev. 0
Issued date : 2016. 01
Page 4 / 7
When the material inside the vessel exists around the sensing rod, the vibration frequency is
significantly reduced, and the output from the sensing coil is decreased to a very low value.
It is operated using the above mentioned operation principle, and when a signal is supplied to
alarm and/or process control.
4. Dimensions
Controller Sensor

Doc. no. :HTM-930 M_Kor_2016, Rev. 0
Issued date : 2016. 01
Page 5 / 7
5. Installation Method
1. Sensor should be installed using a 3/4" PT
coupling or a designated flange.
Fig. 1 Schematic diagram for wiring
2. Sensor should not be installed at the inlet of
material to be measured.
(However, when sensor is installed at the inlet of
material to be measured, the protection plate for
the sensing rod should be installed to endure the
force due to falling of material to be measured.
Refer Fig. 1.)
3. The direction of cable gland should be
forwarded to the ground.
6. Wiring Method
6.1 HLC – 901L
1) Refer Fig. 2.
Fig. 2.1 Schematic diagram for wiring
2) Two-wire twisted shield cable should be used
when wiring sensor and the unit. (HITROL’s standard
length is 6 m. However, when the distance between
the sensor and the unit is over 6 m, it is required to
consult cable specification to HITROL.)
3) When wiring between the sensor and the unit, the
separate cable conduits should be used for power
and sensor signal.
4) It should be grounded for either the sensor or the
units.
5) The sensitivity can be adjusted using Dial. If it is
dialed counterclockwise, the vibration becomes weak
and the sensitivity becomes high. But, if clockwise,
the vibration becomes strong and the sensitivity
becomes low.

Doc. no. :HTM-930 M_Kor_2016, Rev. 0
Issued date : 2016. 01
Page 6 / 7
6.2 HLC – 901P
1) Reger Fig. 2.1
Fig. 2.2 Schematic diagram for wiring
2) Two-wire twisted shield cable should be used
when wiring sensor and the unit. (HITROL’s standard
length is 6 m. However, when the distance between
the sensor and the unit is over 6 m, it is required to
consult cable specification to HITROL.)
3) When wiring between the sensor and the unit,
the separate cable conduits should be used for
power and sensor signal.
4) It should be grounded for either the sensor or
the units.
5) The sensitivity can be adjusted using DEG. If it is
dialed counterclockwise, the vibration becomes weak
and the sensitivity becomes high. But, if clockwise,
the vibration becomes strong and the sensitivity
becomes low.
7. Maintenance
 It is recommended to clean and check the sensing rod frequently by removing the
sensing rod from the vessel when the material is hard or viscous.
Fig. 3 Schematic diagram for wiring

Doc. no. :HTM-930 M_Kor_2016, Rev. 0
Issued date : 2016. 01
Page 7 / 7
HITROL CO,. LTD.
HEAD OFFICE FACTORY R & D INSTITUTE
141 (Palhakgol-gil 98), Palhakgol-gil,
Jori-eup, Paju-si Gyeonggi-do, Korea
TEL : [phone]
FAX : [phone]~9
http://www.hitrol.com
[email protected]