Luwa HTT-V Series User manual

Operating Instruction Q5.25.45
TLT Page 1 / 18
Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
Revision: - Revision: -
Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
Humidity and Temperature Transmitter HTT-V

Operating Instruction Q5.25.45
TLT Page 2 / 18
Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
Revision: - Revision: -
Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
Table of contents
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OM MP PO ON NE EN NT TS S . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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1. .1 1H Hu um mi id di it ty y a an nd d t te em mp pe er ra at tu ur re e t tr ra an ns sm mi it tt te er r
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1. .2 2A Ac cc ce es ss so or ri ie es s a an nd d s sp pa ar re e p pa ar rt ts s
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RO OD DU UC CT T D DE ES SC CR RI IP PT TI IO ON N
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2. .1 1S Sc co op pe e o of f d de el li iv ve er ry y
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2. .2 2T Tr ra an ns sm mi it tt te er r F Fe ea at tu ur re es s . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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2. .3 3F Fa ac ct to or ry y S Se et tt ti in ng gs s . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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2. .4 4T Te ec ch hn ni ic ca al l s sp pe ec ci if fi ic ca at ti io on ns s . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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2. .5 5 D Di im me en ns si io on ns s
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NS ST TA AL LL LA AT TI IO ON N . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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OU UN NT TI IN NG G . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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5. .1 1O Ou ut ts si id de e m me ea as su ur re em me en nt t . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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TA AR RT TU UP P . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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6. .1 1C Co on nn ne ec ct ti io on ns s
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ON NF FI IG GU UR RA AT TI IO ON N . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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7. .1 1W Wo or rk ki in ng g p pr ri in nc ci ip pl le e . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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7. .2 2O Ou ut tp pu ut t s si ig gn na al l s se el le ec ct ti io on n . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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7. .3 3M Me ea as su ur re em me en nt t m mo od de e: :
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7. .4 4C Ca al li ib br ra at ti io on n H HR R: : . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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7. .5 5C Ca al li ib br ra at ti io on n t te em mp pe er ra at tu ur re e: : . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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7. .6 6A An na al lo og gu ue e O Ou ut tp pu ut ts s: : . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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7. .7 7T Te em mp pe er ra at tu ur re e U Un ni it t: :
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7. .8 8L Lo ow w- -p pa as ss sf fi il lt te er r s se et tt ti in ng g : : . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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7. .9 9M Ma an nu ua al l o ov ve er rr ri id de e: :
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7. .1 10 0P Pa as ss sw wo or rd d p pr ro ot te ec ct ti io on n: : . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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YS ST TE EM M M ME ES SS SA AG GE ES S
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EC CH HN NI IC CA AL L S SU UP PP PO OR RT T . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
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Operating Instruction Q5.25.45
TLT Page 3 / 18
Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
Revision: - Revision: -
Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
1
1 C C
O
OM MP PO ON NE EN NT TS S
1
1. .1 1
H
Hu um mi id di it ty y a an nd d t te em mp pe er ra at tu ur re e t tr ra an ns sm mi it tt te er r
AN 28896
Humidity / temperature transmitter type DigiControl
HTT-V S room, with 24 VAC/VDC power supply, with
LCD display, with standard polyformaldehyde (POM)
probe length 90 mm.
AN 28897 AN 29164
Humidity / temperature transmitter type DigiControl
HTT-V M1, with 24 VAC/VDC power supply, with LCD
display,
with remote stainless steel probe length 250 mm,
on 3m wire.
Humidity / temperature transmitter type DigiControl
HTT-V M2, with 24 VAC/VDC power supply, with LCD
display,
with remote stainless steel probe length 250 mm,
on 10m wire.

Operating Instruction Q5.25.45
TLT Page 4 / 18
Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
Revision: - Revision: -
Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
1
1. .2 2
A
Ac cc ce es ss so or ri ie es s a an nd d s sp pa ar re e p pa ar rt ts s
AN 28928 AN 28929
Sal_SC humidity set 58% 75% Sal_SC humidity 90%
AN 29025 AN 28904
Sal_SC humidity 33% Probe assembly bracket for duct 13mm
AN 28905 AN 28916
Probe-wall-mounting bracket 13mm (2 pieces) Connector set for HTT-V “S“ and “M“ 3 pieces
AN 28914 AN 28920 AN 28920
Power supply module 24 VAC/DC Special screw set for cover Screw set bottom

Operating Instruction Q5.25.45
TLT Page 5 / 18
Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
Revision: - Revision: -
Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
AN 28902 AN 29121
Stainless steel probe duct HTT-V M1, length of cable
3 m
To use with high humidity (> 85%)
Stainless steel probe duct HTT-V M2, length of cable
10 m
To use with high humidity (> 85%)
AN 28901 AN 28907
Probe room HTT-V “S“ Electronics Module Transmitter HTT-V “S“ room
AN 28926 AN 28909
Electronics Module Transmitter HTT-V “M“ ext. Housing bottom complete
AN 28911 AN 28910
Housing cover HTT-V “M“ without electronics Housing cover HTT-V “S“ without electronics

Operating Instruction Q5.25.45
TLT Page 6 / 18
Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
Revision: - Revision: -
Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
2
2 P P
R
RO OD DU UC CT T D DE ES SC CR RI IP PT TI IO ON N
The Luwa HTT-V, Stransmitter is a rugged precision measuring instrument for the use in HVAC control and regu-
lating systems. It continuously measures up to three times per second, the relative humidity and the actual air
temperature and shows the measured value on a large LCD display and simultaneously on two high-precision
analogue outputs.
Special features:
• Large LCD for a simultaneous display of %RH and temperature
• Easy and intuitive menu navigation (3 keys)
• 2 analogue outputs for measured value %RH und temperature (U or I), freely scalable
• Possibility of adjustment von %HR and temperature (3 points %HR / 1 point temperature)
• Average value display (1/4: 1 : 3 h display for 3 seconds)
• Password protection for all settings
• Changeover of Aout U / I and the display °C/°F
• Permanent online monitoring of all functions
Luwa HTT-V-M Luwa HTT-V-S
2
2. .1 1
S
Sc co op pe e o of f d de el li iv ve er ry y
The HTT-V S/M contains:
• RH/T measuring instrument including probe in room – duct version
• Stain relief plate including screw set and 4 spacers
• Instruction manual
• Assembly instructions
Check the completeness of the box contents.
Incomplete deliveries can be completed immediately by the Luwa Air Engineering AG representation.

Operating Instruction Q5.25.45
TLT Page 7 / 18
Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
Revision: - Revision: -
Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
2
2. .2 2
T
Tr ra an ns sm mi it tt te er r F Fe ea at tu ur re es s
Type HTT-V room HTT-V duct
Item number 28896 28897
Supply voltage 24 VDC +/-25%
(no galvanic isolation of input and output)
Power consumption min 20mA typical 50 mA max. 80 mA
(current outputs)
Measuring range -20…+80°C 0…100.0% RH
Application range 0…50°C
(Electronic) -20…80°C (Sensor)
Breathing air measurement
(MAC value respected)
Humidity / Temperature probe Digital capacitive humidity and temperature measuring system
Standard measurement accuracy +/- 0.4°C
(at 25°C) +/- 1.2°C (0…50°C)
+/- 2.5 - 3.0% RH
(20…80-90% RH) +/- 5.0% RH (0…100% RH)
Option measurement accuracy +/- 0.2°C
(at 25°C) +/- 1.0°C (0…50°C)
(with 3 points RH / 1 point T factory ad-
justment) +/- 1.5% RH
(10…90% RH) +/- 4.0% RH (0…100% RH)
Measurement hysteresis temperature /
humidity +/- 0.1°C +/- 1.0% RH
Measurement interval 330…500 ms
Temperature effect on measurement typical 0.06% RH /°C
Resolution of analog outputs typical 5 mV : 5uA
Accuracy of analog outputs typical 0.05% FS
(of the entire measuring range)
Housing protection class IP 54
Housing material POM
Probe protecting class IP 54
(with polymer membrane filter as option for type S, stand for type R and M)
Probe material Stainless steel / POM
Storage temperature range 5…+ 55°Cnoncondensing!
EMV-CE tests EN 61326-1 / EN 61326/A1 / EN 61010-1
2
2. .3 3
F
Fa ac ct to or ry y S Se et tt ti in ng gs s
Display: Temp. : -20…+80°C
Humidity : 0…100.0% RH
AOUT 1: Humidity : 0…10V. 0…20, 4…20mA / 0…100% RH
AOUT 2: Temp. : 0…10V, 0…20, 4…20mA / -20…+80°C
Password : "0000" -> deactivated
Factory adjustment : precalibrated (standard)
Opt. calibration : "CAL RH" L/M/H (3 PKT)
"CAL T" (1 PKT)
2
2. .4 4
T
Te ec ch hn ni ic ca al l s sp pe ec ci if fi ic ca at ti io on ns s
Power supply ......24 VAC / VDC ±25%
Output ..................2 x 4-20 mA
Max. Last: 500 Ohm (4-20 mA)
Galvanic separation...........................Output
Power consumption ..........................5 VA
CE-conformity (EMV).........................EN 61 326
Electrical connection.........................Screw terminals up to max. 1.5 mm²
Operating temperature
housing...............................................0 to +50°C
Probe...................................................-20 to +80°C
Storage temperature..........................5 to +55°C
Medium ...............................................air and neutral gases

Operating Instruction Q5.25.45
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Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
Revision: - Revision: -
Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
2
2. .5 5 D Di im me en ns si io on ns s
3
3 S S
A
AF FE ET TY Y
This equipment has left the factory perfectly safety-related way.
Inappropriate manipulations or modifications are strictly forbidden. Follow all warnings and warning labels on
the instrument and in the manual.
The HTT-V is exclusively developed for the measurement in fresh air environments within the specifications.
Use and run this instrument only for this purpose. A different or additional use is considered as not intended.
The manufacture / supplier is not liable for possible damage caused. The risk is entirely assumed by the user.
The assembly and installation work shall only be done by certified personal (electrician or workman with
equivalent training).
The HTT-V may be operated only under the specified operating conditions.
Wherever malfunctions or errors can cause large material damage or personal injury, additional precautions
and external safety measures must be taken, so that in case of an error defined operating conditions are
guaranteed (for example limit switch).
The HTT-V is not suitable for the use in hazardous rooms.
The professional installation should comply with local electrical codes and with this manual.
The HTT-V contains ESD-sensitive components. Please refer to the appropriate safety measures.
Use only original accessories and spare parts from Luwa Air Engineering AG.
Without written permission from Luwa Air Engineering AG it is not allowed to carry out extensions or remodel-
ing at the HTT-V.
4
4 I I
N
NS ST TA AL LL LA AT TI IO ON N
General:
1. Read carefully the manual before the installation of the HTT-V instrument.
2. Verify the performance data on the label fixed on the instrument and check whether or not it is suitable for
your application.
3. Choose the appropriate mounting place according to the application and specification (possibly in cooperation
with the planners)
4. Observe strictly that the device specifications and the MAC values (maximum allowable concentration for the
chemical load for craftsmen) match.
5. Avoid that the instrument and the probe are exposed to a corrosive ambient air.

Operating Instruction Q5.25.45
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Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
Revision: - Revision: -
Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
5
5 M M
O
OU UN NT TI IN NG G
1. First remove the bottom of the instrument. If necessary, 4 holes can be broken through for the mounting on
the wall or at the ventilation duct. The breakthroughs should remain closed when assembling it at a ventilation
duct through cable flanges. This is the only way to guarantee the housing tightness
2. In case of unevenness of the mounting wall, 4 spacers can be assembled.
3. Insert the appropriate cables into the membrane which is at the bottom of the instrument by piercing small
holes into the membrane with a pointed scriber and then push the cables (only simple isolation) through the
holes.
4. Please use the stain relief plate for a cable stain relief.
5. After having set the dowels or drilled the appropriate holes in the wall, the bottom can be screwed.
6. Now you can screw the cables on the connector with the ferrule. Please consider for this the electric diagram
of the designer, respectively of the instrument.
7. Check the wiring carefully, before connecting the plugs to the cover plate with integrated electronics.
8. Introduce the cover plate into the upper bracket and click it laterally on the bottom. Check the correct fitting.
9. After switching on the supply voltage the HTT-V registers on the display.
EMC note:
1. Disturbing circuits of measurement or analysis units have to be separated by open ground.
2. Avoid, wherever possible, the parallel motion of measurement connections and power electric cables.
3. Shield the measurement connections, if necessary, and connect the screen only on one side with a defined
mass potential.
4. Twist the unshielded cables in pairs and keep them as short as possible.
Recommended cabling:
Supply: 24 VDC +/- 10% single-strands from 0.5...0.75 mm2 (22 ... 18 AWG) with PVC insulation or equivalent 2-
fold strand.
AOUT: 0...10 VDC / 0... 20 mA
Single-strand from 0.25...0.5 mm2 (24 ... 20 AWG) twisted and possibly shielded with PVC insulation or corre-
sponding 2/3/4-fold strand.

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Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
Revision: - Revision: -
Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
5
5. .1 1
O
Ou ut ts si id de e m me ea as su ur re em me en nt t
For the outside measurements, use the same cables as for the duct measurements. The probe does not neces-
sarily have to be installed inside the duct, but can also be secured by means of a pipe clip to the outside wall of
the building. This application is used to detect the outside conditions, for example for the enthalpy. So that the
probe is not exposed to all weathers, a cover should be fitted over it.
6
6 S S
T
TA AR RT TU UP P
Before you start the system, check the correct supply wiring and the configuration of the analogue outputs (U/I
switch). Close the cover of the HTT-V before the power supply is switched on. Check the fuse protection on the
power supply in accordance with the current local regulations. Voltages above +35VDC lead to destruction of the
measuring instrument! The HTT-V is calibrated to a basic accuracy of +/- 2.5 - 3.0 % HR. (option +/- 1.5 % HR
with factory certificate). After switching-on the power supply, an automatic start-up occurs *S TST*. On the top
line of the display the current software version is shown for 2 seconds. After that the measurement starts immedi-
ately and the current relative humidity and temperature is displayed. In case of faults of the hard- or software, the
system alerts „ERROR” and shows an error-code. The device has an online monitoring, which reports error im-
mediately. The analogue outputs are protected against short circuit, but not protected against external supply.
Outside wall
Cover
Prob
e
Pipe Clip

Operating Instruction Q5.25.45
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Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
Revision: - Revision: -
Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
6
6. .1 1
C
Co on nn ne ec ct ti io on ns s
a
e
Analogue
outputs
b
Power supply
Connector for standard humidi-
ty probe
c
f
Probe connection room
d
Connection fittings
Output selection
4-20 mA
or 0-10V
Kabelverschraubung
c
Connector for remote humidity probe
d
Anlague
outputs
Connection fittings
d
b
a
Power supply
Output selection
4-20 mA
or 0-10V
e
Probe connection duct
f

Operating Instruction Q5.25.45
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Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
Electrical connections
This connection must be made by a qualified technician.
To make the connection, the transmitter must not be energized.
Power suppy connection
Before making the
connection, you must first
check the power supply which is indicated on
the transmitter board
Output signal selection
Voltage (0-10 V) or current (4-20 mA)
Select on the miniatur switch the diesred output signal.
Connection analogue output
•
4
-
20 mA
:
Power supply terminal
block
Down
0-10 V
Up
4-20 mA
Terminal block
•
0
–
10 V:

Operating Instruction Q5.25.45
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7
7 C C
O
ON NF FI IG GU UR RA AT TI IO ON N
7
7. .1 1
W
Wo or rk ki in ng g p pr ri in nc ci ip pl le e
The configuration of the transmitter is done via the keypad which is front mounted under the display.
7
7. .2 2
O
Ou ut tp pu ut t s si ig gn na al l s se el le ec ct ti io on n
The HTT-V is delivered ready for operation. At the
most the analogue outputs and the display options
for the application have to be configured. For this,
the instrument has an intuitive menu guidance,
which is
started by the key „Enter“.
Menu keys:
Operation :
"ENTER"
ENTER : -> Menu and submenus
Press 2 seconds for the change [ ↑]* : -> Men
u
upwards increases the flashing digit [ ↓]* : -> Men
u
downwards reduces the flashing digit
* Average function in the measuring mode
Following menu items can be used:
• Measuring mode (Standard & average
value display)
• Calibration (adjustment) of rel. humidity
• Calibration (adjustment) of temperature
• Adjustment of the analogue outputs
(U: 0,2...10V -I: 0,4...20 mA) and free scaling of the
ranges
• Switchover unit °C or °F
• Key lock-code (Password protection)
•
Each menu item can be selected by [ ↑], [ ↓]
Voltage or current?
The selection of the analogue
output is made on the on-off
slide switch on the board of
the transmitter.
Down
0-10 V
Up
4-20 mA
Graphic
display
Operation
panel

Operating Instruction Q5.25.45
TLT Page 14 / 18
Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
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Calibration humidity
*CAL RF
Measurement
mode
Calibration temp.
*CAL T
Analogue outputs
*AN OUT
7
7. .3 3
M
Me ea as su ur re em me en nt t m mo od de e: :
To get directly from any menu item to the measurement mode, press for minimum 2 seconds the “Enter” key.
The measurement mode is automatically activated 2 minutes after the last key press. The relative air humidity
and temperature (°C or °F) are simultaneously displayed. In case of an error an error-code is displayed instead of
the temperature. If the arithmetic average of the relative air humidity respectively of the temperature should be
displayed, then press in the measure mode the button [ ↓]. It appears then the average of the last 1/4 h (1 arrow
on the top right of the LCD). Press twice to show the average of 1 hour and three times for the average of the last
3 hours. After about three seconds all arrows disappear and the system returns to the current measurement
mode.
7
7. .4 4
C
Ca al li ib br ra at ti io on n H HR R: :
You reach this menu by pressing ENTER -> „*CAL RH“ -> ENTER -> “CAL 1“ -> ENTER. There is the
possibility to adjust 3 humidity points separately (1: Low / 2: Medium / 3: High) without any restriction.
As an example, we show the adjustment by SAL-SC 33%:
Drop the SAL-SC 33% HR together with the adapter „CH“ over the probe, after having inspected visually
and shaken the SAL-SC. Make sure that the cylinder is close to the probe.
Wait at least 30 minutes (necessary for the balancing of the moisture inside the cylinder). The ambient tem-
perature should not vary during this time (SAL-SC 90%RH > wait 3h!).
By pressing the ENTER key go to the change mode.
Read the generated humidity level with the corresponding room temperature from the table of the SAL-SC.
Perhaps it is necessary to interpolate the value accordingly.
Set up the desired value of humidity with the keys [ ↑], [ ↓] (press ENTER for the next digit!)
After the last digit appears on the display “no SAVE?n“ By pressing the keys [ ↑] or [ ↓] you get to „YES
SAVE?“ and close off the function with the ENTER button (it appears briefly “*DONE*“ on the display).
The adjustment point “CAL 1“ is now terminated.
7
7. .5 5
C
Ca al li ib br ra at ti io on n t te em mp pe er ra at tu ur re e: :
The adjustment of the temperature measurement can be done at one point (offset shift of the temperature curve).
The procedure is the same as for the adjustment of the relative humidity. Here too, an entered value can easily be
deleted by the menu function“CAL CLR“. (Range +/- 4.0 °C) Press „Exit“ to leave this menu item.
7
7. .6 6
A
An na al lo og gu ue e O Ou ut tp pu ut ts s: :
You can set the scaling of the analogue outputs and the ranges 0....10V/0...20mA or 2...10V/4...20mA
“Range L“: Lower % HR humidity value -> normally = 0.0 % RH
“Range H“: Higher % HR humidity value -> normally = 100.0 % RH
“Range L“: Lower temperature value -> normally = -20.0 °C
“Range H“: Higher temperature value ->normally = +80.0 °C
Example: (ANA OUT: 4 - 20 / switch I)
0.0 % RH -> 4 mA
100.0 % RH -> 20 mA AOUT 1
- 20.0 °C -> 4 mA
+80.0 °C -> 20 mA AOUT 2
„ANA OUT“: Outputs can be changed depending on the switch setting „Aout“
[ ↓] U: 0 - 10V <-> 2 - 10V
I: 0 - 20mA <-> 4 - 20mA

Operating Instruction Q5.25.45
TLT Page 15 / 18
Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
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Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
7
7. .7 7
O
Of ff fs se et t a ad dj ju us st tm me en nt t f fo or r a an na al lo og gu ue e o ou ut tp pu ut t: :
With this function, the analogue output and the value for manual output can be adjusted
from -5%RH to 105%RH. This allows an adaption to inaccurate analogue inputs.
7.7.1 Settings before correction
Adjust the desired values for Range L and Range H at the Transmitter HTT-V,
for example 0%RH (RLs) and 100%RH (RHs).
Set the desired output range (0/2..10V, 0/4..20mA).
Set the control system in the same way.
7.7.2 Measurement
Enter a manual value for example 10%RH (S1). Note the range on the control system, e.g. 11%RH (M1).
Enter a manual value e.g. 90%RH (S2). Note the range on the control system e.g. 92%RH (M2)
7.7.3 Calculation Gain and Offset
7.7.4 Calculation corrected settings Range L and Range H
To adjust 0.9[%RH]
To adjust 102.1[%RH]
The display on the control system should now concur with the one on the transmitter. The linearity of both sys-
tems is assumed.
Should the deviation at the nominal value of the measurement of the system be too big due to a nonlinearity,
chose for S 2 a value around the nominal measuring value and for S 1 the RLs value.

Operating Instruction Q5.25.45
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Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
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Temperature Unit
*UNIT T
Manual override
*MANVAL
Password protection
*KEYLO
Filter settings RH
F. RH
Exit Menu
EXIT
7
7. .8 8
T
Te em mp pe er ra at tu ur re e U Un ni it t: :
In this menu item you can change the unit temperature from °C (ISO unit) to the US format
°F. The changeover is done by pressing the keys [ ↑], [ ↓].
7
7. .9 9
L
Lo ow w- -p pa as ss sf fi il lt te er r s se et tt ti in ng g: :
Press [ENTER]. ⇒ The display starts flashing. Use [↑] or [↓] to set the low-pass filter between 0 and20.
Press [ENTER] again for confirmation.
Remark:
The low-pass filter damps the measurement value display as well as the analogue output signal. This func-
tion can be used in case of big pressure oscillations.
Basically it is recommended to set a low filter with high oscillations (high frequency) and a high filter with low
oscillations (low frequency).
7
7. .1 10 0
M
Ma an nu ua al l o ov ve er rr ri id de e: :
In this menu item the actual value of the temperature and humidity can be overridden. This override is active for
10 minutes, then the system displays the current actual value of the temperature and humidity.
7
7. .1 11 1
P
Pa as ss sw wo or rd d p pr ro ot te ec ct ti io on n: :
At shipping from factory the password is deactivated. You can activate the password (4 digits) on your own.
Attention: The activation of the password is set by the code >< „0000“ and activating the menu “Loc “ , but
latest after 2 minutes (without operation). Note your password. Password reset can only be done via the factory-
reset function. Thereby all configuration data will be deleted and the factory settings are taken over.
Menu: *KEYLO -> ENTER -> CODE -> ENTER -> Setting of the password -> [ ↑] LOCK & ENTER -> Password
activated *DONE*
Reset to factory settings:
All parameters including the password code are reset to the factory settings. This function is activated as follows:
• Switch off the supply voltage
• Press and keep pushed the key [ ↑] when the power supply is turned off and switch the power supply on again
• Following text appears on the display: “FA SET?“
• Select with the keys [ ↑], [ ↓] “YES“
• “DONE“ is displayed and the instrument is restarted. The device is thus reset to factory settings.
7
7. .1 12 2
E
Ex xi it t t th he e s se et t- -u up p
• In the Exit Menu press the key, to change in the measurement mode.
• press the [Enter] key for more than 2sec., at any menu level, for changing to the measurement mode.

Operating Instruction Q5.25.45
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Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.
8
8 S S
Y
YS ST TE EM M M ME ES SS SA AG GE ES S
*S TST“: Power ON reset
*DONE“: Action completed successfully
*CODE? “ : Password needed
*---.-“ : Defective probe element
*SPACE“ : CAL points are too close (2.0%RH)
*RANGE“ : Range exceeded
*Power“ : Operating voltage outside the limits
*FATAL“ : Fatal error
*DATA“ : Not enough data for Moving Average
Error messages:
A serious error is displayed with an error code. This is important for error analysis. Please send us in such cases
always the fault code.
9
9 T T
E
EC CH HN NI IC CA AL L S SU UP PP PO OR RT T
Luwa Air Engineering AG has an extensive worldwide network of representatives, which offers a service at any
time with their experienced technicians. Report any disturbance to your local representative
of Luwa Air Engineering
www.luwa.com

Operating Instruction Q5.25.45
TLT Page 18 / 18
Draft created/changed: 31.01.03/TT Document created/changed: 03.08.2012 / Rea
Revision: - Revision: -
Draft released: 18.02.03/DEL Document released: 03.08.2012 / Rea
Jede unerlaubte Verwendung ist strafbar / Any unpermitted use is subject to prosecution.