Technical Data Sheet
Presure • Temperature • Humidity • Air Velocity • Air Flow
Part number
To order, just add the code to complete the part number :
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Humidity transmitter
N
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HM 50
• Humidity transmitter type HM 50
• Range 0-100 %RH
• 0-10 V output, active sensor, power supply 24 Vac/Vdc (3-4 wires) or
4 -20 mA output, passive loop, power supply 18 to 30 Vdc (2 wires)
• ABS IP 30 housing, without display
• Quick and easy mounting with the “ ¼ turn” system with wall-mount plate
Features of the transmitter
Humidity
Working principle : the measurement of humidity is made by only one digital
component CMOS (complementary metal-oxyde semiconductor), including
a capacitive element and a thermistor. This technology guarantees an
excellent stability in the long term, along with a great accuracy of the
measurement.
Measuring range.................................0 to 100 %RH
Unit of measurement..........................% RH
Response time....................................1/e (63%) 4 s
Type of fluid ........................................air and neutral gases
Transmitter/ Power supply / Output
V Active • 24 Vac/Vdc • 0-10V
HM 50
Example : HM 50-A
Model : humidity transmitter HM 50, passive loop 4-20 mA.
Dimensions
(with wall-mount plate)
-
100 mm
110 mm
Ø 13 mm
• 18/30 Vdc • 4-20 mA A Passive
42 mm
30 mm
HYGROMETRY PROBE :
Guaranteed Accuracy Limits* (GAL) = ±2,95 % RH
between 18 and 28°C (normal measurement range)
Measuring range : 0 to 100%RH
Short-term drift : 1%RH / year
* As per norm NFX 15-113 and the Charter
"2000-2001 HYGROMETERS”.
Features of the housing
Housing ...............................................ABS
Fire-proof classification.....................HB as per UL94
Dimensions .........................................see drawing beside
Protection............................................IP 30
Cable grip ............................................for cables Ø 7 mm max.
Weight..................................................110 g
Technical Specifications
Output / Power supply ...........active sensor 0-10 V (power supply 24 Vac/Vdc ±10%), 3-4 wires
.......................................................
.......................................................
.......................................................
Consumption ......................................2 VA (0-10V) or max. 22 mA (4-20 mA)
Electro-magnetical compatibility .....EN 61326
Electrical connection screw terminal block for cable Ø 1.5 mm² max.
Communication to PC ........................ Kimo RS 232 cable
Working temperature .........................+10 to +40°C
Storage temperature ..........................-10 to +70°C
Environment .......................................air and neutral gases
........................
passive loop 4-20 mA (power supply 18/30 Vdc), 2 wires
maximum load : 500 Ohms (4-20 mA)
minimum load : 1 K Ohms (0-10 V)
* GAL = Et + Ehl + k (uet +ur +ud +us )1/2
As per the Charter 2000/2001 Hygrometers with :
uet : uncertainty of calibration = ± 0,55%RH
ur : uncertainty of resolution = ± 0,003%RH
ud : manufacturing dispersion = ± 0,2%RH
us :comparison repeatability = 0,13%RH
Et : temperature coefficient error = ± 0,42%RH
Ehl : Linearity and hysteresis errors = ± 1,33%RH
k :coverage factor value = 2
22 22
Connection
For the model
HM 50-V • 0-10 V output - active sensor
Connection to PC via
e
LCC 100 software
c
Cable grip
c
Cable grip : to insert the cable, it is required to slightly cut the rubber.
Output
Vdc RH ......direct voltage (humidity)
a
a
Output
GND...........ground
Power supply
Vdc ......direct voltage
b
GND ....ground
OR
Vac.......alternative voltage (phase)
b
Vac.......alternative voltage (neutral)
For the model
HM 50-A • 4-20 mA output - passive loop
a
Output terminal block
b
Power supply
Vdc ............direct voltage
a
IRH..............direct current (humidity)
Electrical connection - as per norm NFC15-100
This connection must be made by a qualified technician. To make the connection, the transmitter must not be energized.
!
For the model
HM 50-V • 0-10 V output - active sensor
For the model
HM 50-A • 4-20 mA output - passive loop
4 wires
Output
terminal block
Power supply
terminal block
Humidity
Vdc RH
GND
Vdc
GND
+
-
4 wires
+
-
-
Power supply
OR
+
24 Vdc
+
-
Vac
Vac
Regulator display
or PLC/BMS
passive type
~
~
~
Power supply
24 Vac
Class II
Vdc
+
-
IRH
~
3 wires
To make a 3-wire connection, before powering up the transmitter, please
!
connect the output ground to the input ground. See drawing below.
Output
terminal block
Power supply
terminal block
Vdc RH
GND
Vdc
GND
+
24 Vdc
+
-
terminal block
OR
Power supply
terminal block
-
Output
Vdc RH
GND
Vac
GND
+
3 wires
~
Phase
Power supply
+
3 wires
+
Power supply
24 Vac
Neutral
+
-
Vdc
IRH
+
-
Power supply
+
2 wires
2 wires
18-30 Vdc
OR
2 wires
-
+
I in
-
Regulator display
or PLC/BMS
+
passive loop
Regulator display
or PLC/BMS
active sensor
2
Configuration
You can configure the offset of the transmitter via software (connection on “connnection” drawing).
In order to balance an eventual drift of the transmitter, you can add an offset to the value measured
by the HM 50
Example :
=> the HM50 indicates 48%RH, the standard reference indicates 45%RH
=> via the software LCC 100, you can add an offset of “-3” to the value.
• Please refer to the user manual of the LCC 100 to configure the offset.
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Mounting
Installation : mount the ABS plate on the wall (this plate is supplied
with the transmitter). Drilling : Ø 6 mm (with the screws and pins
supplied with the transmitter). Insert the transmitter into the plate
(see points A of the drawing shown beside), by tilting it at 30°. Rotate
the housing in clockwise direction until you hear a “click” which
confirms that the transmitter is correctly installed.
Maintenance
Please avoid any aggressive solvent.
Please protect the transmitter and its probes from any
cleaning product containing formol, that may be used
for cleaning rooms or ducts.
Options
Power supply class 2, input 230 Vac, output 24 Vac,
ref.KIAL-100A
Configuration software LCC 100 with RS 232 cable.
ABS
plate
73 mm
A
Ø 8 mm
68 mm
A
40 mm
7 mm
Ø 4,5 mm
50 mm
3
Ref. FT ang - HM 50 - 06/04 A - We reserve the right to modify the characteristics of our products without notice.
www.kimo.fr
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