Vaisala HMD60 User Manual

HMD60U/Y
HMD60U/Y-M210276en-A Operating Manual
HUMIDITY TRANSMITTER HMD60U

HUMIDITY AND TEMPERATURE TRANSMITTER HMD60Y

MOUNTING

Ø 12
(0.47)
100 (3.94)
100 (3.94)
Mounting hole 82 (3.23)>>>
Mounting hole 82 (3.23)>>>
Figure 1 Dimensions of the HMD60U/Y
The HMD60U/Y humidity and temperature transmitters are two-wire transmitters. They are duct mounted, and the electronics can be disconnected without dismantling the installation.
Mount the transmitter with two screws. Place the drilling template on the duct surface and drill the holes as indicated. Remember to drill an additional hole for calibration purposes. The calibration can be conveniently performed on site with the HMI41 or HM70 portable indicator equipped with an appropriate probe and optional calibration cable.

GROUNDING

flexible wires 0.5 mm²
(AWG 20), stranded wires
recommended
3
140
165
braid
rubber ring
brass disks
nut
cable
25
(If the cable diameter is less
than 7mm, use a shrinking tube or an adhesive tape)
shielding tube
braid
brass disks
D = Ø 7...10mm
Figure 2 Signal cable grounding with bushing 18941HM
Open the lid and mount the cable bushing set 18941HM. Do the grounding according to Figure 2. When connecting
the signal cable to the transmitter housing, fold the cable braid between the brass disk in order to achieve the best EMC per­formance. Do not leave the bare shield of
the connected wires so that it can shortcircuit the electronics!
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HMD60U/Y Operating Manual HMD60U/Y-M210276en-A

ELECTRICAL CONNECTIONS

RH TEST
Figure 3a. Electrical connections.
RH GAIN
RH OFFSET
12 345
T TEST
T GAIN
T OFFSET
-RH +T+RH -T
+
or
mA
mA
-
+
-
or
mA mA
Signal cables are connected to a removeable 5-pole screw connector. Make the connections according to Figure 3a above. RH test and T test connectors are used with the HMI41 or HM70 indicator equipped with an appropriate probe and optional calibration cable.
Figure 3b shows the same connections in alternative way.
RH TEST
Figure 3b. Electrical connections.
RH GAIN
RH OFFSET
1 2 3 4 5
T TEST
T OFFSET
+
RH
-
T GAIN
+
POWER SUPPLY
10...35 VDC
------------
+
RH
CHART RECORDER AMMETER OR CONTROLL ER
RH+T-T
------------
+
TEMPERATURE
CHART RECORDER AMMETER OR CONTROLLER
------------
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HMD60U/Y
HMD60U/Y-M210276en-A Operating Manual

ELECTRONICS

SCREWS
SPARE PART SENSOR
HUMICAP180
MEMBRANE FILTER
part no. 17039HM
LID
SCREW TERMINAL
10528HM
TO REMOVE THE SENSOR HEAD:
1. Open the lid
2. Disconnect the screw terminal
3. Open the screws (2 pcs)
4. Pull out carefully
TO REINSTALL THE SENSOR HEAD:
1. Push in the sensor head
2. Fasten the screws
3. Connect the screw terminal
4. Close the lid
18941HM
GLANDS
STAINLESS STEEL SINTERED FILTER
part no. HM46670
Electronics (can be disconnected), accessories, spare parts

ONE-POINT RH-CALIBRATION

REPLACEMENT OF THE HUMICAP SENSOR AND THE FILTER

The accuracy is recommended to be checked at least once a year; the interval depends on the operating conditions and the required accuracy of the measurement. The transmitter calibration can be conveniently checked with the HMI41 or HM70 indicator equipped with
Remove the damaged sensor and insert a new one. Recalibrate the transmitter. Replace a dirty filter (membrane or sintered) to ensure a maximum lifetime and a fast response for the sensor. Do not
attempt to clean the filter. an appropriate probe and optional calibration cable. If adjustment is needed, use the one-point calibration potentiometer. If you prefer to calibrate the HMD60U/Y transmitters against saturated salt solutions, use LiCl (11 %RH) and NaCl (75 %RH) solutions.
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HMD60U/Y Operating Manual HMD60U/Y-M210276en-A

TECHNICAL DATA

Relative humidity
Measurement range 0...100 %RH Output signal Accuracy at +20 °C
%RH
3
2
1
0
10 4020 605030 8070
0 90 100
-1
-2
-3
Temperature dependence
%RH
2.0
1.5
1.0
0.5 0
-0.5
-1.0
-1.5
-2.0
-20 200
8040 60 ° C10-10 30 50 70
Humidity sensor HUMICAP180 Response time (90%) at 20 °C in still air 15 s with membrane
filter
Temperature (Y model only)
Measurement range -20...+80 °C
Accuracy
°C
0.8
0.6
0.4
0.2
0
-10
-0.2
-0.4
-0.6
-0.8
0-20 10 20 30 40 50 60 70 80 °C
%RH
Sensor protection: standard membrane filter
(part no. DRW010525)
option stainless steel sintered
filter (part no. HM46670)
Connections screw terminals
0.5...1.5 mm
2
Electromagnetic compatibility
The emission and immunity tests have been performed according to standard EN 61326-1:1997 + Am 1:1998, Electrical equipment for measurement, control and laboratory use- EMC requirements; Light environment.
Emissions: Test Setup according to Performance
Radiated interference CISPR16 class B
Immunity: Test Setup according to
Electrostatic discharge EN/IEC 61000-4-2
Electrical fast transients EN/IEC 61000-4-4
RF-radiated fields EN/IEC 61000-4-3
*GSM-field immunity ENV50204:1995 criteria A
Linearity better than 0.1 °C
(*additional test)
Temperature sensor Pt 1000 IEC 751 class B
General
Supply voltage 10...35 VDC (RL= 0Ω)
20...35 VDC (RL=500Ω) Output signal 4...20 mA Operating temperature range: electronics -5...+55 °C sensor head -40...+80 °C Storage temperature range -40...+80 °C Housing: sensor head stainless steel electronics housing cast aluminium Cable lead-through: bushing for 7...10 mm (PG9)
cable (housing IP65 / NEMA 4), part no. 18941HM
or armoured cable glands part no. 10528HM
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GUARANTEE

Vaisala issues a guarantee for the material and workmanship of this product under normal operating conditions for one year from the date of delivery. Exceptional operating conditions, damage due to careless handling or misapplication will void the guarantee.
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