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SAFETY WARNINGS
1) Read this manual carefully before installing the device
2) Installation and maintenance should be carried out by qualified service personnel only
3) Before working on the terminals, make sure the wires to be connected to the device
are not live
4) Do not power or connect the device if any part of it is damaged
Wall-mounted humidity probe
CodeModelRange
VN873600SUR 2 10 ÷ 90 % U.R.
TECHNICAL SPECIFICATIONS
UElectronic humidity probe with active output
UType of sensor: capacitative
UPower supply: 9 ÷ 30 V DC tolerance ± 10%
12÷24 V AC tolerance -10%, +15%
UOperating field:10 ÷ 90% R.H. (0÷50 °C)
UOutput signal:reference range 0÷100% R.H., irrespective of measurement range
Voltage 10 mV/% R.H. (load Rmin = 1 kΩ)
Current 4÷20 mA (load Rmax = 100 Ω)
4 mA = 0%R.H.; 20 mA = 100%R.H.
UPrecision: range:10÷90% R.H.
±
T3% at 25 °C, ± 5% from 10% R.H. to 90% R.H. in the range -10÷60 °C
emporary variations are possible between ± 12% R.H. and ± 2 °C, in
The presence of electromagnetic fields of 10 V/m
UAbsorption:Output in voltage (typical absorption with load of 10 kΩ)
10 mA with 12 V DC power supply
8 mA with 24 V DC power supply
Output in current35 mA with 12 V DC power supply
24 mA with 24 V DC power supply
50 mA with 12 V AC power supply
24 mA with 24 V AC power supply
UTime constant:in still air 60 s
in ventilated air (3 m/s) 20 s
UProtection level: IP30
UTerminal board: screw-on for cables with a max section of 1.5 mm
2
– min. 0.2 mm
2
UStorage conditions: -20 °C ÷ 70 °C, 90% R.H. non-condensing
UOperating conditions: -10 °C ÷ 70 °C or 0 °C ÷ 50 °C, 90% R.H. non-condensing
UClassification in line with protection: Class I and II equipment against electric shock
UHeat and fire resistance category: Category D (for base and cover)
UOver-voltage immunity category: Category 2
GUIDE TO INSTALLATION
UTo open the probe, proceed as shown in box B)
UThe probe can be housed above a 3-module built-in box using 3.5x25 screws
UFor direct wall mounting, we advise using the dowels supplied (S25 + 3.5x25 screws) or a metal
panel. In this latter case, use the M3x10 screws supplied in the fixing kit.
UTake care not to damage the sensors when the tightening the right-hand fixing screw.
UConnect the device as shown in the diagram in box C)
UTo avoid measurement errors caused by the electromagnetic couplings, we advise using a multi-
pole screened cable
UThe cables carrying the signal should not be housed close to the power supply cables or the contact
cables
UAt the minimum, the main insulation should be provided against the control power supply system
to which the probe is connected
GUIDE TO USING THE DEVICE
UAs default, this device is configured with a current output for the direct connection to the universal
instruments from the FHT-…, HR-…. series
UWhen the device is configured with the output in voltage, allowance has to be made for the voltage
drop on the cables: Signal 0÷1 V DC – the effect of the drop on a section of 1 mm
2
is a variation of
0.015 % R.H. per metre of cable (0015% R.H. m/mm
2
)
Cable lengthCable sectionHumidity error
mm 5,0m 03
2
0,9% U.R.
mm 5,1m 03
2
0,3% U.R.
UTo avoid measurement errors due to the power supply current, a supplementary power supply from
an outside transformer to be connected as shown in box F) may be used. The transformer should
not be connected to earth and should be positioned in the regulator panel.
With the supply power supply, there is no flow of power supply current on the connection between
the terminal of the probe marked “M”to the reference terminal of the instrument, and the maxi-
mum remote distance is 100 m
UIf the measurement instrument so permits, we advise selecting the current output for distances
greater than 30 m
UTo select the voltage output, position the pin strips (jumpers) as shown in box E)
UWhen the device is configured with the current output, the minimum remote distance is 200 m:
Signal 4÷20 mA – with an AC power supply it is essential to use cables with a section of 1.5 mm
2
to reduce the noise caused by the power supply current.
In certain cases, this noise may cause measurement instability that can be eliminated with a DC or
supplementary power supply
User Manual
HUMIDITY PROBES
Read all the instructions carefully
V3IS00027-020
Mod.
SUR 2
(A)
21,5 21,5
40 40
83
126
80 29
(B)
(C)
Alimentazione
Power Supply
Alimentation
V ersorgung
Alimentación
+ (G) =
Riferimento alimentazione/uscita
Ground for power and output
Référence alimentation/sortie
Bezug Versorgung / Ausgang
Referencia alimentación/salida
M =
Uscita Umidità
(0 ÷1 VDC o 4 ÷20 mA)
Uumidity output
Sortie umidité
Feuchtigkeitsausgang
Salida humedad
out H=
17 18 16
SUR 2
°C
(G) +
M
Out H
FHT / HR ...DA
7 8 6
SUR 2
FHT / HR ...3D
HR ...3A
7 8 6
SUR 2
(G) +
M
Out H
HR ...P7A
5 6 4
SUR 2
(G) +
M
Out H
(D)
Range 10 ÷ 90% U.R. -10 ÷ 60 °C
% U.R. % rH
5
3
0 25 60 °C
-1
(E)
DP1
DP2
DP1
DP2
DP1
DP2
M
SUR 2
0÷1 V DC
4÷20 mA
Posizione pin-strip DP1 - DP2
Pin-strip configuration
Position Pin-strip
Position Pin-strip
Posición Pin-strip
Uscita in tensione
V oltage output
Sortie tension
Ausgang unter Spannung
Salida en tensión
Rmin = 1kΩ
Uscita in corrente
Current output
Sortie courant
Ausgang unter Strom
Salida en corriente
Rmax = 100 Ω
(G) +
out H
DP1
DP2
M
SUR 2
(G) +
out H
(F)
SUR 2
230 VAC
12 V AC
M
(G) +
out H
TMC 10/24
8 6 5
1 4
VN315800
230 V ~
50/60 Hz
F
ta 40° C
12 V ~
5 VA
12 V ~
5 VA
4 1
5 6
Vemer S.p.A.
I - 32032 Feltre (BL) • Via Camp Lonc, 16
Tel +39 0439 80638 • Fax +39 0439 80619
e-mail: info@vemer.it - web site: www.vemer.it
/