HB Products HBX Vapor Quality sensor Operator's manual

HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
Installation and conguration guide
HBX Vapor Quality sensor
Sensors for optimizing Evaporator Control, both for DX (direct expansion) and
overfeed CR (Circulating Refrigerant) - systems
Introduction:
The three dierent versions are available, with the same function. Pipe size and piping layout, bend or
straight, is dierent and suited for dierent applications. The strainer house version has one xed ow di-
rection, whereas the two stainless versions accept ow in both directions.
HBX Vapor Quality Sensors measures the Vapor Quality of the refrigerant vapor leaving an evaporator and
use this signal for controlling the expansion valve. Thanks to the capacitive measurement principle it is able
to measure the liquid content of the uid leaving the evaporator without pressure drop.
For “DX” systems the vapor quality sensor can replace the conventional superheat control and is able to re-
duce the superheat to zero. The sensor can control the valve directly or it can provide the high vapor quality
measurement for an external control system. The vapor quality sensor react instantaneously if the dryness
of the gas is changed in the evaporator outlet. Experience has shown that the entire system is in better bal-
ance with minimum variation in pressure.
In overfeed and ooded systems the sensor is able to measure the low vapor quality in the evaporator outlet
and control the circulation ratio (CR) by controlling the liquid valve or the pump capacity, either directly or
as an input for a PLC.
The sensor is manufactured in stainless steel or cast steel and can be used for all commonly used refriger-
ants CO2, Hydrocarbons, ammonia, HFO’s and HFC’s with dierent settings. The HBX sensor is available in
several versions, with and without temperature sensor and cable for direct connection to an expansion
valve. Three types of expansion valves are supported: stepper motor, PWM pulse modulating ex. AKV valves
and modulating 4-20mA controlled expansion valve.
A special ATEX/IECEx (EEx ib IIC) version is available for use in special hazardous areas and with ammable
refrigerants. This product is only suited for external control and is not able to control an expansion valve di-
rectly.
Angle strainer version
Angle rod version
In-line version

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
Table of Contents
introducon............................................................................................... 1
Safety Instrucon ...................................................................................... 2
Applicaon and mounng strainer house version .................................... 3
Applicaon and mounng straight pipe version ....................................... 4
Applicaon and mounng small rod in pipe version................................. 5
Installaon of temperature sensor............................................................ 6
Removal of electrical unit.......................................................................... 7
Sensor conguraon ................................................................................. 7
How to use the sensor............................................................................... 8
How does the control work for DX operaon……… ……………………………… 9
Sensor setup Basic sengs as controller ................................................ 11
Sensor setup advanced sengs as controller ......................................... 12
Sensor setup Basic sengs for PLC input................................................ 13
Sensor setup advanced sengs for PLC input ........................................ 13
Connecng diagram stepper motor ........................................................ 15
Connecng diagram motor valve ............................................................ 16
Connecng diagram pulse modulang.................................................... 17
Connecng diagram PLC and ATEX......................................................... 18
Calibraon of sensor ............................................................................... 19
Remote seng ........................................................................................ 22
LED indicaons on sensor head............................................................... 23
Safety Instructions
CAUTION! Read this setup guide before installing and using the HBX Sensor.
Installation of HBX sensor must be carried out by a trained professional with in-depth knowledge of both
refrigeration and electronics. Improper installation and use of the HBX Sensor may result in damage to
material and/or people. The installation and use of the HBX Sensor must be done according to local regula-
tion.
Altering type-approved equipment voids the type approval. The product's input and output, as well as its
accessories, may only be connected as described in this guide. HB Products assumes no liability for dam-
ages resulting from failing to follow the instructions in this setup guide.
Intended use. The purpose of the HBX sensor is refrigerant measurement and control.
If the HBX is to be used in a different way, prior, written consent must be obtained from HB Products.
Repair: Any repair must be carried out by a trained professional.
Disposal instructions: The HBX is designed for long life operation. If or when it becomes necessary to
dispose of the sensor it must be done according to local regulation.
CAUTION! This symbol refers to a possible limitation of functionality or risk in usage.
NOTE! Contains important additional information about the product and provides further advice.
CAUTION! Factory sengs do not guarantee safe operaon since the conguraon
parameters depend on the system design

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
Up
Flow direcon
Flow direcon
H
H
H
Risk of trapped refrigerant
around the sensor disturbs the
measurement when lid down-
wards
Application and mounting instruction
Sensor mounted in a strainer house (HBX-xxx-ST)
The HBX-sensor is mounted after the evaporator and is able to measure the Vapor Quality (dryness) from 0 to 1. The
output can be used as input to a PLC or it can control the expansion valve directly or both. The sensor is mounted in a
strainer house where the strainer is replaced by the sensor. Compared to the original strainer the ow direction is
opposite and the mounting is upside down.
The sensor have to be mounted in downward sloping pipes to ensure drainage of refrigerant, and oil. The lid need to
be upwards as other mountings will be sensitive to oil contamination and trapped refrigerant during startup.
When the sensor is welded into the plant the lid and sensor have to be removed. After the welding the piping have
to be checked for welding debris and deformations which might disturb the measurement. The distance between
the sensor element and the wall have to be uniform.
The lid with sensor is remounted and the bolts are tightened according to the table.
HRemove lid with sensor
before welding
Max torque for bolts
H

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
Application and mounting instruction
Sensor mounted in a straight pipe HBX in-line
The HBX-sensor is mounted after the evaporator and is able to measure the Vapor Quality (dryness) from 0.2 to 1. The
output can be used as input to a PLC or it can control the expansion valve directly or both. This sensor version is
mounted in a straight pipe and it accepts ow in both directions.
The sensor can be mounted in dierent positions as long as you make sure there is no trapped refrigerant inside the
sensor during startup. Mounting the sensor with the electronic unit pointing downwards is not ideal as the connectors
might disturb the liquid ow in the bottom of the pipe and make the measurement unprecise.
The electrical unit can be mounted on either of the two connecting points
When the sensor is welded into the plant the electronic unit
have to be removed in order to protect it from the heat. The
studs have to be cooled during welding as the include O-rings
which does not tolerate temperature beyond 100°C. A wet
cloth is normally sucient to cool the studs.
Remove electronic unit be-
fore welding or soldering and
cool the studs ex. with a wet
cloth.
This mounting
will suer from
trapped refrig-
erant in the
sensor tube
With the sensor downwards the
internal connections will disturb
the liquid ow in the bottom of
the pipe. The measurements
might be unprecise
Apply
cooling

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
HBX
Flow direcon
Angle minimum 30 downwards
Piping should be designed
with a P-trap/drop-leg to avo-
id liquid and oil accumulaon
around the sensor.
Note: the pipe from the evap-
orator should dropping
Evaporator
Application and mounting instruction
Angle rod version
The sensor accept ow in both directions, but have to be mounted in downward sloping pipes to ensure drainage of
refrigerant, and oil. The sensor can be mounted in dierent positions. But some will be sensitive to oil contamination
and trapped refrigerant during startup. Make sure that the sensor rod inside the long pipe is free from trapped refrig-
erant and oil at any time. The sensor pipes has a larger dimension than stated in the specication, but is delivered
with reductions to t the specied pipe diameter. This is done to avoid pressure loss coming from a massive inner rod
lling some of the pipe and reducing the cross section
Workarounds for low mounted evaporator outlets
The outlet pipe should be angled minimum downwards 1 ᵒ or designed with a
P-trap/drop-leg.
This mounting will suer
from trapped refrigerant in
the metal block ,where the
sensor is mounted
This mounting will suer from
trapped refrigerant in the
sensor tube
This mounting will suer from
trapped refrigerant in the sensor
tube
H
Flow direcon
Flow direcon
Slope downwards

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
Installing the HBX-DX Sensor
The sensor is installed in the outlet of the evaporator, as part of the sucon line. Soldering connecon, ngs and pipes are
made of stainless steel. The sensor part itself must be removed by unscrewing it from the steel block/base part before sol-
dering.
Unscrew the complete sensor part before solder-
ing.
Use two wrenches when dismantling and installing
the HBX-Sensor. One to turn the sensor and one on
to stabilize the steel block to avoid stress to the
soldering's.
Use thread sealant.
We recommend using liquid thread sealant when
installing the sensor
Insulate the entire
mechanical sensor
part with insulation
foam.
Temperature sensor installaon
The sensor normally has a cable with a temperature sensor which have to be mounted to the pipework using cable es or to
the lid of the larger strainer models. The temperature sensor compensate for the change in the dielectrical constant with the
temperature and make the measurement more accurate when starng the system. Refrigeraon systems working with NH3
can operate well without a temperature sensor.
The temperature sensor should
be mounted to a pipe in posi-
tion 3 or 9 o’clock with cable
ties as shown.
For strainer houses the clip can
be used for attaching it to the
lid

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
Sensor conguraon
All HBX sensors can be calibrated using a pc and a M12 -USB cable. The soware can be downloaded freely on the HB
products web page. The conguraon data can be stored in the sensor and will be there unl erased without power con-
necon—just like you store data on a memory sck. When you change a value /seng there will be put a check mark next
to it and that indicates you have changed something and need to store the data in the sensor.
When the sensor is mounted in a refrigeraon plant where it is dicult to reach or it is awful cold you should consider
using an M12 extension cable in your installaon. This allows for conguraon of your sensor where you have your M12/
M12 connecon.
PLC
Cable from HB sensor
USB
M12 female
M12 male
USB conguraon cable used for con-
necng all sensors with M12 con-
nector to a pc with the HB tool
order code HBxC-USB
Removal of the electrical unit
End view without electronic unit
The threaded union between the electronic and
mechanical part allows for fast removal and
remounng of the electronic element without
interfering with the pressurised system. No
tools are needed for the operaon.

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
Setup — sensor or control
The sensor can operate in two very dierent modes
• As sensor input to a PLC, computer or other device that
uses the sensor signal
• A direct controller of an electrically controlled expansion
or liquid valve versions with a cable output can be set up
as a controller
Select Control/Sensor to select the mode
How to use the sensor
Two dierent versions
Two dierent versions exist
• A pure sensor version—without the controller capability
• A version which can both control an expansion valve with a simple input and act as a sensor together
with a PLC
The sensors are able to control an expansion valve has a cable beside the temperature sensor cable, which can
be connected directly to the valve. The sensors which are specied only to provide a signal for a PLC will only
have the M12 connection. All sensors, except those for NH3 refrigeration, has a cable with a PT1000 tempera-
ture sensor, which measure the operating temperature and make the needed compensations.
Stop-
start
Power
24VDC
PLC
Sensor only version
Controller and sensor
version
PLC

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
How does the expansion valve control loop work for DX operaon
From stop to Start
To start the process you need to acvate the run in signal by applying 5-24 V on pin 5 when you remove the voltage the
system will stop. If this signal is not set the automac dry-out is not working
Dry out period
Then the controller will open the expansion valve to dry out the sensor and start the process. This funcon is only ac-
ve if the sensor basic seng “run in signal” is set to “ON” The idea behind the dry out funcon is to make sure the
process is started and gas from the evaporator start owing through the sensor and remove potenal liquid refrigerant
and oil. The opening of the expansion valve also prevent the system from shung down due to low sucon pressure.
If the system usually is dry aer a stop or defrost, the period used for dry-out can be reduced.
The dry out run for a period specied in the parameter: “Dry out funcon in sec” and is ramped up with the speed set
in the parameter: “Ramp dry out % in sec”. When the dry out is done, ramp up to normal operaon will begin.
Ramping up capacity
The system will start slowly due to a PI controller which will ramp up the capacity depending on the sengs. The “P-
band in %” specify the target for the expansion valve opening and the “I-factor in sec” specify how long me it takes to
reach the target.
What then happens is that the controller start opening the expansion valve at “valve speed 2 open % in sec” which
means more and more liquid is send to the evaporator. Aer a period the maximum capacity is reached and the HBX
sensor begins to detect liquid and the opening of the expansion valve is reduced to “valve speed 1 open % in sec”. At
this point the X value pass 1, where X value is a measure for the vapor quality where X=0 is all liquid and X=1 is dry gas.
With the reduced valve opening speed the capacity will sll increase unl the setpoint “Degree of dryness “X” ” is
reached. Aer this point the controller will open and close the valve to maintain a stabile “X “value.
Normal operaon and stopping
The normal operaon will connue unl the system is stopped by removing the voltage on pin 5 for defrost or a regu-
lar stop. Aer stop, the process will restart with a new dry out period, which is important for a smooth operaon.
80%
Valve Opening
100%
60%
40%
20%
+5°K
LL Alarm...0.900
Set.point.0.980
Start with
Wet sensor
Dry sensor
Wet sensor
Vapor Quality
”X”
Voltage/signal on pin 5, Start/Stop Signal
0%
Time
24V
0
Ramping up capacityDry out
period
stop Normal operaon stop
Valve opening

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
What happens when the process is disturbed
If something happens with the complete system which results in liquid in the evaporator outlet there is a build in safety
system that protect the compressor. If the sensor measures a “X” value lower than the “low limit safety alarm in “X”
the valve will be closed rapidly unl setpoint “Degree of dryness “X” ” is reached again. The speed can be adjusted in
the parameter: “Low Limit Valve close %/sec” and is a default set very high for safety reasons—it might lead to unsta-
ble running. If the system has a accumulator before the compressor the “Low Limit Valve close%/sec” can be set to a
lower value e.g. 0.8 instead of the default 0.9 to avoid instability. The gure below shows what happens when the low
limit safety alarm is hit.
To make sure the compressor is not shut down due to too low sucon pressure there is a parameter: “Minimum valve
opening in %” in the system. There is also a parameter: “Maximum valve opening in %” which is there to limit the liquid
injecon if the valve is too large.
How does the control loop work for ooded operaon
The sensor can control a liquid valve or a circulaon pump directly in a similar maer as for an expansion valve in DX
operaon. The control loop can work with any vapor quality all the way to X=0 (all liquid) if needed.
HB-products support can help you with seng up the system.
Min. Valve opening
80%
Valve Opening
100%
60%
40%
20%
Valve opening/closing me
”X”
+5°K
LL Alarm...0.900
Set.point.0.980
Start with
Wet sensor
Dry sensor
Wet sensor
Vapor Quality
”X”
DI, Start/Stop Signal, Run-In…..pin 5
0%
Time
Valve Speed 2 Valve Speed 1
ON
OFF
Valve Close
Low Limit Safety Alarm at ”X” 0.9
Closing the liquid Valve to minimum Valve
opening (Ramp me controlled)
Valve Open
Speed 2
Valve Closing
Speed
Open
Speed 1
Dry out period

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
1. Set the degree of dryness, ”X” value. For DX operation a good starting point would be 0.985 the closer to 1
you go the dryer the gas will be. The X value is the Vol% of liquid
2. Set the P-band to 30% as a starting point. If the value is set higher the valve will react slower
3. Set the I-factor to 120 sec as a starting point. This means the system will ramp up over a period of 120 sec-
onds
4. Set lter time to 5 seconds. The lter time is the period of time over which the X measurement is evened
out. Increased lter time smoothens the measurement, but the risk is that the system becomes too slow.
5. Run in signal (digital input pin 5) is used as external start and stop signal when set to ”ON” this is im-
portant. If set to “OFF” the dry-out will not work and there is a risk that the control system will not really
start up because the sensor is wet to begin with.
6. Zero cal. function: Choose ”ON” if you want to use the push button ”R” for zero calibration
7. The “Alarm setting in “X” “ is 0.8 as default. The alarm setting is normally not used
8. The “Alarm delay in seconds” is as default 10 sec. The alarm is normally not used
9. If the sensor has a temperature sensor it has to be mounted according to the installation guide and the
“Temp. comp. function” should be set to “Temp. oset” This activates the temperature compensation and
gets a more accurate “X” measurement
10. Select a refrigerant from the drop down list. If your refrigerant is not in the list please contact HB-products
11. After changing settings push the button ”Save to sensor” (the message ”OK” on the screen indicates that the
settings are saved)
12. Go to next page: Advanced settings
How to setup the sensor as direct controller of a expansion valve.
Typical values for DX operation

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
1. Alarm output, NO (normally open) or NC (normally closed) , default is ”NC” (Fail safe function)
2. Valve speed 1 opening time in sec. , Default is 0.1sec. and a good starting point
3. Valve speed 2 opening time in sec. Used for fast opening during start-up , Default is 0.3sec.
4. Valve speed closing time in sec., default is 0.2sec. and a good starting point
5. Dry out time function in sec., The function opens the expansion valve to dry-out the sensor after a stop or
defrost, this is essential for a good starting process
6. Ramp dry-out %, degree of valve opening in % per second (safe function to minimize hydraulic shock) 2
% is a good starting point
7. Minimum valve opening in % (ensures against stops due to low suction pressure) 10 % is a good starting
point
8. Maximum valve opening in %, normally set to 100% but a lower number is used for oversize valves
9. Low limit safety alarm in ”X” value, default value is 0.85 Close the expansion valve to minimum opening
0.85 is a good starting point
10. Low limit valve close time in sec., default value is 5% per second used for fast closing when the sensor
getting wet 5% is a good starting point
11. After Changing settings push the button ”Save to sensor” (a message ”OK” on the screen indicate that the
settings is saved)
12. Check all settings by push the button ”Show sensor settings”
13. Save settings le is used to save all the settings as a txt le
14. Load settings le is used to set up all parameters from a existing .hbp le (copy data to a new sensor)
The content can be read in a text program like MS word
Stepper motor sengs only ap-
pear in sensors with built-in step-
per motor print.
Can be used for all valve types,
stepper motor sengs must
match manufacturer's instruc-
ons.
Displayed sengs are for a Carel
EV2 valves. There is an instruc-
on manual describing how to
setup and connect dierent
valves on HBproduct.dk
If you need further help, please
contact supp[email protected]
Advanced settings for sensor as direct controller of a expansion valve.

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
Using the sensor for controlling a ooded or semi ooded evaporator
The sensor have to be set to ooded operaon called “HBX-CR” this is normally done at delivery. If this is not done or
the sensor have to be used for another purpose it can be changed in the Calibraon tab in the HB tool. You start by
cking o the three small boxes to the right. Then the large input boxes come to live and you can change the applica-
on to “HBX-CR” for ooded operaons and set the sensor type if wrong. At the same me you can change the opera-
on range from minimum in the box called “X measuring scale” to maximum called “Dry sensor” When you are done
changing the parameters, you store them in the sensor by clicking on “X scale calculaon”
The output of the sensor can be used for controlling a liquid valve directly or the analogue output in pin 4 can be used
as input to the PLC. The signal is scaled linear from 4 to 20 mA where 4 mA is send for the “dry sensor” and the 20 mA
for the minimum “X measuring scale”
An Example:
If you set the minimum to 0.50 and maximum to 1.00 you will get 16 mA for “degree of dryness “X” of 0.625
AO signal: 20— 16* ( 0.625-0,5) / (1,0-0,5) =16 mA on pin 4
Current for
minimum “X”
Range
(20-4 )mA
minimum
maximum
X
minimum
Tick o here for geng
access to selecon of
applicaon
Tick o and
select applica-
on to HBX-CR
here
Set minimum
value here
Set maximum
x value here
Tick o here
and select
sensor type
Click here to
store the data
in the sensor

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
When the sensor is not operating as a controller some of the parameters are irrelevant and the boxed are inactive
and shown in grey.
1. Set lter time to 2 seconds. The lter time is the period of time over which the X measurement is evened
out. The longer the range the more smooth the measurement become, but the risk is that the system be-
comes too slow.
2. Run in signal (digital input pin 5) is used as external start and stop when operating as a controller and
should be OFF
3. Zero cal. function: Choose ”ON” if you want to use the push bottom ”R” for zero calibration
4. The “Alarm setting in “X” “ is 0.8 as default. Set the value if you need it in your PLC.
5. The “Alarm delay in seconds” is as default 10 sec. Set the value if you need it in your PLC.
6. The temperature compensation function is set to “Temp oset” unless you don’t want this functionality. This
only apply if the sensor has a temperature sensor
7. The refrigerant is chosen which is essential to get a correct measurement
8. After changing settings push the button ”Save to sensor” (the message ”OK” on the screen indicates that the
settings are saved)
9. Go to next page: Advanced settings
How to setup the sensor as input for PLC
Typical values for DX operation

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
1. Alarm output, NO (normally open) or NC (normally closed) , default is ”NC” (Fail safe function)
2. After Changing settings push the button ”Save to sensor” (a message ”OK” on the screen indicate that
the settings is saved)
3. Save settings le is used to save all the settings as a txt le
4. Load settings le is used to set up all parameters from a existing txt le (copy data to a new sensor)
Advanced settings for sensor as input for PLC

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
+24V DC
- Common
AI 4-20 mA Remote sengs*
AO,4-24 mA level **
DI start stop
4
1
5
3
2
R
1
5
4
3
2
ALARM
LIQUID
POWER
PLC
AI
AI
AO
AI
DO
Run IN signal 5 to 24 V
Temperature sensor PT1000
Should be mounted on the outside of
the tube in posion 3 or 9 o´clock with
strips
Color coding
A+ = yellow(2)
A- = white (4)
B- = green (1)
B+= brown (3)
Connecon diagram for HBX/S (stepper motor) with temperature compensaon — here shown
with Carel E2V
• In the ”advanced sengs” the stepper motor
sengs for the valve should be specied
• Analog output see page 19
*Please see appendix for descripon of remote sengs
** When the sensor is very wet it will deliver 22 mA

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HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
AO = Gray , 4-20 mA
- Common
AI 4-20 mA Remote sengs*
AO,4-24 mA level vapor quality**
DI start stop
4
1
5
3
2
R
1
5
4
3
2
ALARM
LIQUID
POWER
PLC
AI
AI
AO
AI
DO
Run IN signal 5 to 24 V
Motor valve: 4-20 mA 24 V DC, max 24 W
3 wire connecon
Connecon diagram for HBX/C motor valve— here shown with Siemens MVS661
-common
+ supply
mA input
mAoutput posion
Open/Close valve
G0
G
Y
M
U
ZC
+24V DC
+ = Brown Supply
- = White common
Manual open/close
Close Open
MVS661 motor valve
Opportunies when used as controller:
• Addional analog output showing Vapor Quality, 4-20mA
(sensor pin. 4).
• Change set-value by remote seng, 4-20mA (sensor pin. 3).
• Controller funcon may be monitored by data logging of the
valve posion, as shown by measuring the valve opening signal
on MVS661 terminal U (4-20mA/0-10V)
• Analogue output see page 19
*Please see appendix for descripon of remote sengs
** When the sensor is very wet it will deliver 22 mA
Important informaon on motor valves
Some motor valves does not work properly when mounted in a cold
room. Please check supplier specicaon

18
HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
- Common
DO—PWM +24V DC
AO, 4-24 mA level vapor quality**
DI start stop
4
1
5
3
2
R
1
5
4
3
2
ALARM
LIQUID
POWER
PLC
AI
AI
AO
AI
DO
Run IN signal 5 to 24 V
Connection diagram for HBX/PWM— pulse modulating expansion valves
Danfoss AKV/AKVA and Hansen PXV/PXVW
+24V DC
HBSSR box solid state relay
Power input 24 to 240 V AC
Note:
• HBX-DX/C-R-3-X/PWM, with valve cable for easy electrical
connecon.
• HBX-DX-R-3-X/PWM, without valve cable, then the PWM out-
put is connected to PIN3 (blue colour).
• The HBSSR-BOX is included.
• Analogue output see page 19
HBSSR box solid state relay
Power input 24 to 240 V AC
Wiring using M12 connector
Wiring using cable
** When the sensor is very wet it will deliver 22 mA

19
HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
- Common
Not used
AO,4-24 mA level vapor quality **
Not used
1
5
4
3
2PLC
AI
AI
AO
AI
DO
Connection diagram for sensor without control cable, connected to PLC
+24V DC
Not used
Not used
AO,4-20 mA level vapor quality
Not used
1
5
4
3
2
PLC
AI
AI
AO
AI
DO
+24V DC
The sensor with ATEX approval use a two wire connecon.
This means only two pins in the M12 connector are acve
and the output is a 4-20 mA analogsignal.
Connecon diagram for special two wire ATEX version
Degree of dryness ”X” 1.00 0.99 0.98 0.97 0.96 0.95
mA value 4.00 7.20 10.40 13.60 16.80 20.00
Analog output
The analogue 4-20 mA output on pin 4 is linear with the “Degree of dryness “X” as shown in the table. This is similar for all
types of sensors in DX operaon. For ooded operaon see separate secon.
** When the sensor is very wet it will deliver 22 mA

20
HBX-all types installaon and calibraon manual date: 06-11-2019 WWW.HBPRODUCTS.DK
Calibraon of sensor for DX operaon
The sensor is delivered with a basic calibraon for the refrigerant you specied when ordering. The sensor can be used
directly without further calibraon. You can check the calibraon as described below. If the calibraon is not opmal the
accuracy can be improved by making a simple dry calibraon at normal operang temperature., when the system has
been operang for some hours. The calibraon procedure is described in the secon below. The calibraon will depend
on
• Refrigerant
• Sensor and pipe dimensions
• Operang temperature (the temperature sensor will eliminate the inuence of the temperature)
How to check your calibraon and make a new calibraon of sensor controlling an expansion valve
 Start your refrigeraon system and let it reach normal operang temperature.
 Make sure the sensor is completely dry which can be done in dierent ways depending on your system
• If possible close the expansion valve manually and wait 1 minute for the system to evaporate all the
refrigerant
• Set the “degree of dryness “X” to 1.00 and the “Minimum valve opening in %“ to 0 this is done with the HB
tool as described before. Wait for 2 minutes
a. Disconnect the M12 plug and connect a pc with the HB tool with a USB/M12 cable.
b. Check the control bar at the boom of the page indicate 0%
c. Select the “calibraon” tab and you get the picture shown.
d. Your calibraon is perfect if you don’t get a lower “Actual measurement in pF” than the value stated in the eld
“Dry calibraon in pF” if the “Actual measurement in pF” is lower you need to make a calibraon. This is done by
clicking on the “Dry sensor calibraon” boom. If the “Dry calibraon in pF” sll is higher than the “Actual
measurement in pF” click the buon once again
e. When the calibraon is perfect, set the
“degree of dryness “X” back to normal, and the
“Minimum valve opening in %“ to normal and then
unplug the pc , reconnect the normal M12 plug .