GHM Delta OHM HD53LS.A User manual

Operating manual
Ultrasonic anemometers
HD53LS.A / HD53LS.S
www.deltaohm.com
English
Keep for future reference.

HD53LS - 2 - V1.3
TABLE OF CONTENTS
1 INTRODUCTION .................................................................................................... 3
2 TECHNICAL SPECIFICATIONS ...............................................................................
3 MEASURING PRINCIPLE OF WIND SPEED AND DIRECTION .................................. 5
INSTALLATION ..................................................................................................... 6
4.1 ALIGNMENT OF THE INSTRUMENT .............................................................................. 7
4.2 ELECTRICAL CONNECTIONS ..................................................................................... 8
4.2.1 RS232 SERIAL CONNECTION ...................................................................... 9
4.2.2 RS485 SERIAL CONNECTION (ONLY HD53LS.S) ............................................... 9
4.2.3 ANALOG OUT UTS CONNECTION (ONLY HD53LS.A) ......................................... 10
4.2.4 CONNECTION OF RS52 CABLE.................................................................... 11
5 CONFIGURATION ................................................................................................ 12
5.1 SERIAL COMMANDS ............................................................................................ 12
6 MODBUS-RTU MODE (ONLY HD53LS.S) ............................................................... 18
7 INSTRUMENT STORAGE ...................................................................................... 19
8 SAFETY INSTRUCTIONS ...................................................................................... 19
9 ACCESSORIES ORDERING CODES ....................................................................... 20

HD53LS - 3 - V1.3
1INTRODUCTION
HD53LS.A and HD53LS.S are 2-axis ultrasonic static anemometers for the measurement of:
•Wind speed and direction
•U-V Cartesian components of wind speed
•Wind Gust (only HD53LS.S)
The average of wind speed and direction over a period configurable up to 10 minutes is calcu-
lated.
Wind speed and direction are determined by measuring the transit time of ultrasonic pulses
between two pairs of ultrasonic transducers.
HD53LS.A has two analog outputs, for wind speed and direction, which are factory-configurable
within 4÷20 mA (standard), 0÷1 V, 0÷5 V or 0÷10 V (to be specified when ordering).
HD53LS.S has RS485 MODBUS-RTU output.
All models are equipped with a magnetic compass.
Mounting on ∅ 40 mm mast. The electric connection is performed through a M23 19-pole con-
nector situated on the bottom of the instrument.
The low power consumption of the instrument allows installation in remote sites, with power
supplied by photovoltaic panel and backup battery.
The absence of moving parts minimizes the instrument maintenance.

HD53LS - 4 - V1.3
2TECHNICAL SPECIFICATIONS
Wind speed
Used sensor Ultrasounds
Measuring range 0…50 m/s
Resolution 0.01 m/s
Accuracy ± 0.2 m/s or ± 2%, the greatest (0…35 m/s), ± 3% (> 35 m/s)
Wind direction
Used sensor Ultrasounds
Measuring range 0…359.9°
Resolution 0,1°
Accuracy ± 2° RMSE from 1.0 m/s
Compass
Sensor Magnetic
Measuring range 0…360°
Resolution 0.1°
Accuracy ± 1°
General features
ower Supply 10…30 Vdc (15…30 Vdc for version with 0÷10 V analog out-
put)
ower consumption 26 mA @ 12 Vdc
Analog output 2 analog outputs: one for wind speed and one for wind di-
rection (only in HD53LS.A).
Analog output type is 4…20 mA as standard; 0…1 V, 0…5 V
or 0…10 V available on request.
Analog output refresh rate 1 Hz.
Digital output RS485 MODBUS-RTU (only in HD53LS.S)
Averaging interval Configurable from 1 s to 10 min
Electrical connection M23 connector
Operating temperature -20…+55 °C
Survival speed 90 m/s
rotection degree I 66
Dimensions H=179mm, ∅=150mm
Weight 640 g approx.
Case ASA. Metal parts: AISI 316

HD53LS - 5 - V1.3
3MEASURING PRINCIPLE OF WIND SPEED AND DIRECTION
Wind speed and direction are determined by measuring the time taken by ultrasonic pulses to
cover the distance from the transducer that generates the pulse to the receiving transducer.
The instrument uses 2 pairs of transducers oriented along two orthogonal axes. Detecting the
wind speed along two axes allows determining not only the intensity but also the wind direc-
tion.
The instrument measures the travel time of the ultrasonic pulse between the two transducers
of the same pair in both directions. The travel times in the two opposed directions are defined
as tA (forward direction time) and tR (reverse direction time).
If wind speed is zero, tA and tR values are the same. In the presence of wind, one of the two
time values is greater than the other and the comparison between the two time values allows
to determine the direction and the intensity of the wind.
Measuring the travel time in both directions allows to cancel the dependence of the transmis-
sion speed of ultrasounds in the air from the environmental conditions of temperature, humidi-
ty and barometric pressure.
Measurement along first axis Measurement along second axis
The travel times of the ultrasonic pulses are given by:
W
A
V
C
D
t
+
=
W
R
V
C
D
t
−
=
Where:
D = Distance between the two transducers of the same pair
C = Sound speed
VW = Component of wind speed along the measurement axis
Measuring the two travel times allows determining the wind speed component:





−⋅=
RA
Wtt
D
V11
2
Axis U
Transducer Transducer
Transducer Transducer
Axis V

HD53LS - 6 - V1.3
INSTALLATION
To install the instrument, pass the connection cable inside the support mast and connect the
19-pole M23 female connector of the cable to the 19-pole M23 male connector situated at the
bottom of the instrument. Ensure connection stability by tightening the connector external nut.
Align the arrow on the housing of the instrument to the North (see par. 4.1 “Alignment”), then
fix it on the support mast by tightening the cable tie at the bottom of the instrument.
The support mast, having 40 mm maximum outer diameter and 36 mm minimum inner diame-
ter, should be positioned on a stable surface.
The instrument should be installed vertically and in an open area, far from obstructions located
in the vicinity that might alter the natural air flow. Any close objects (such as buildings, trees,
pylons, etc.) should be at a distance equal to at least ten times their height.
In the presence of close objects, it is advisable to place the instrument at a height of 10 m.
For open-space installations, the instrument can be installed using the tripod HD2005.20
(2 m) or HD2005.20.1 (3 m).
If the instrument is installed on a building, the height of the instrument should be at least 1.5
times the minimum value between the height of the building and the roof longest diagonal.

HD53LS - 7 - V1.3
Mount the instrument far from magnetic materials and devices that generate magnetic fields
(electric motors, electric power cables, electric transformers, radars, radio transmitters etc.) in
order to prevent faulty indications from the magnetic compass.
In case of mobile installations (for example on a boat), take into account that the instrument
measures the relative (apparent) wind speed with respect to the instrument. To determine the
absolute (real) wind speed one should consider the movement velocity of the instrument.
The instrument is factory-calibrated and does not require additional interventions of the user.
For the available configuration parameters, the related factory settings and the commands to
modify the parameters, see Chapter 6 “CONFIGURATION”.
In the model HD53LS.S, the RS485 MODBUS-RTU mode will be active 10 seconds after power
up.
.1 ALIGNMENT OF THE INSTRUMENT
The instrument is equipped with a magnetic compass, and wind speed and direction measure-
ments are automatically compensated and referred to magnetic North, even if alignment to
North is not performed. This allows obtaining accurate measurements even in case of mobile
installations.
It is possible to disable the compass compensation of the wind speed and direction measure-
ments. In this case it is necessary to align the instrument during installation. The arrows on
the case will facilitate the alignment.
For an accurate alignment, connect the instrument to a C (see following chapters for commu-
nication protocols), then rotate the instrument on its vertical axis until the compass measures
0.0° ± 0.1°.
When evaluating the wind direction, one should take into account that the geographic North
differs from the magnetic North indicated by a magnetic compass. The difference, named
magnetic declination, depends on the area where the instrument was installed (for example,
about 15° in North-America and less than 3° in Europe).
If wind speed and direction values are given in polar coordinates, 0° angle corresponds to a
wind coming from North.
Arrow for
alignement
to North
Supporting plate
of ultrasonic sensors

HD53LS - 8 - V1.3
.2 ELECTRICAL CONNECTIONS
All connections are performed through a 19-pole M23 male connector situated at the bottom of
the instrument. The figure and the table below show numbers and function of the connector
contacts and the corresponding wires of the optional CP52.x cable:
Connector
pin No
CP52.x cable
wire No/color Symbol Description
1 Not connected
2 2 / Blue Not connected
3 3 / Yellow RX + RX for RS232 connection
4 Not connected
5 Not connected
6 6 / ink Not connected
7 7 / Violet Not connected
8 8 / Grey GND Serial ground
9 9 / White TX - DATA - for RS485 connection (only HD53LS.S)
TX for RS232 connection
10 Not connected
11 Not connected
12 12 / Black GND Instrument power supply negative
13 4 / Grey- ink Not connected
14 10 / Brown OUT 1 Analog output 1 positive (only HD53LS.A)
15 GND Analog ground (only HD53LS.A)
16 11 / Green OUT 2 Analog output 2 positive (only HD53LS.A)
17 5 / Red-Blue TX + DATA + for RS485 connection (only HD53LS.S)
18 V + Instrument power supply positive (10…30 Vdc)
19 1 / Red V + Instrument power supply positive (10…30 Vdc)
-- Black (thick wire) SHIELD Cable shield
Connector
Reference
Visible side
male
connector

HD53LS - 9 - V1.3
.2.1 RS232 SERIAL CONNECTION
For RS232 connection, TX-, RX+ and serial GND signals (pin 9, 3 and 8 of M23 connector) are
used, to be connected respectively to RX, TX and GND signals of RS232 port on C (pin 2, 3
and 5 of 9-pole SubD connector). The length of RS232 cables should not exceed 15 m.
The RS232 serial connection is used for the instrument configuration (via serial commands or
HD52.3D-S software) and for displaying the measurements in real time (via HD52.3D-S soft-
ware).
If the C is not equipped with RS232 serial ports, the RS52 adapting cable (with built-in
USB/RS232 converter) can be inserted between the C and the instrument (see paragraph 4.2.4).
.2.2 RS 85 SERIAL CONNECTION (ONLY HD53LS.S)
Thanks to RS485 connection, multiple instruments can be connected to a multi-point network.
Instruments are connected in sequence through a twisted-pair shielded cable for signals and a
third wire for ground.
Line terminations should be placed at the two ends of the network. The cable shield should be
connected to both ends of the line.
The maximum number of devices that can be connected to the RS485 line (Bus) depends on the
load characteristics of the devices to be connected. The RS485 standard requires that the total
Reference of female
connector solder side
ower supply
ower su
p
ply
RS232
ort
RS485/USB or RS485/RS232
converter or data logger
with RS485 port
Other sensors with
RS485 output
Termination Termination
Reference of female
connector solder side

HD53LS - 10 - V1.3
load does not exceed 32 unit loads. The load of an HD52.3D… anemometer is equal to ¼ of unit
load. If the total load is greater than 32 unit loads, divide the network into segments and add a
signal repeater between a segment and the successive one. Line termination should be applied
at both ends of each segment.
The maximum length of the cable depends on the transmission speed and the cable character-
istics. Typically, the maximum length is 1200 m. The data line should be kept separated from
any power lines in order to prevent interference with the transmitted signal.
Each instrument on the network is univocally identified by an address. Multiple transmitters
with the same address should not be placed on the network.
If the instrument is connected to a data logger, the possibility to connect multiple sensors to
the network depends on the data logger capacity to manage multiple sensors.
MODBUS-RTU protocol is used with RS485 connection.
Before connecting the instrument to the network, configure address and Baud Rate (see chap-
ter 6 “CONFIGURATION”).
.2.3 ANALOG OUTPUTS CONNECTION (ONLY HD53LS.A)
Connect the outputs according to one of the two schemes below, depending on the output
type, current (standard) or voltage (on request), available in the instrument. OUT 1 and
OUT 2 are associated to wind speed and direction respectively. To change the type of speed
and direction measurements associated to the outputs, see chapter 6 “CONFIGURATION”.
Current outputs are active. Load resistance: RL < 300 Ω.
Load resistance: RL > 10 kΩ.
ower supply
ower supply
Reference of female
connector solder side
Reference of female
connector solder side
Current
outputs
4…20mA
Voltage outputs

HD53LS - 11 - V1.3
.2. CONNECTION OF RS52 CABLE
If the C is not equipped with RS232 serial ports, but with USB ports only, the RS52 adapting ca-
ble (with built-in USB/RS232 converter) should be interposed between the C and the instrument.
To use the RS52 cable, the drivers included in the HD52.3D-S software package should be in-
stalled in the C (see the guide to USB drivers installation included in the software package).
The instrument is powered directly from the USB port of the C.
Reference of female
connector solder side
RS52 cable

HD53LS - 12 - V1.3
5CONFIGURATION
Configuration mode allows to read the instrument general info (firmware version, calibration
date, serial number), to read and set the instrument operation parameters.
To configure the instrument, a RS232 serial connection to a C should be performed (see par-
agraph 4.2.1). If your C is not equipped with RS232 serial ports, the RS52 adapting cable can
be placed between the C and the instrument (see paragraph 4.2.4).
The instrument configuration can be realized with the aid of the HD52.3D-S application soft-
ware (see the instructions of the software) or by sending serial commands via standard com-
munication programs.
If a standard communication program is used, the program communication parameters should
be set as follows:
•Baud rate: 115200
•Data Bits: 8
•arity: None
•Stop Bit: 2
HD53LS.S:
The serial output of the HD53LS.S model is preset to operate in MODBUS-RTU mode; in order
to enter configuration mode after connecting the instrument to the C via RS232 it is neces-
sary to send within 10 seconds from power on (if the instrument is already powered, pow-
er cycle the instrument) the serial command @ (if a standard communication program is used)
or the request of connection with the HD52.3D-S application software, if the application soft-
ware is used.
To reset the serial output of the HD53LS.S model to MODBUS-RTU mode after the configura-
tion has been carried out, power cycle the instrument: the MODBUS-RTU protocol will become
active after 10 seconds from restart.
HD53LS.A:
The serial output of the HD53LS.A model is always in configuration mode.
5.1 SERIAL COMMANDS
The tables below describe the serial commands that allow reading the current instrument con-
figuration and change the operation parameters.
Instrument information
Command Reply Description
G1 &Vnn.nn yyyy/mm/dd| Version and date of firmware
RGD &yyyy/mm/dd hh.mm.ss|
Date and time of calibration
RGS &nnnnnnnn| Serial number of instrument
RGI &ccc…ccc| User code
CGIccc…ccc &| Sets user code to ccc…ccc
(max. 34 characters)

HD53LS - 13 - V1.3
General parameters:
Command Reply Description
CGUVn &| Sets measuring unit of wind speed:
m/s if n=1
cm/s if n=2
km/h if n=3
knot if n=4
mph if n=5
Default : m/s (n=1)
RGUV n| Reads the wind speed measuring unit set in the in-
strument
CWCnnnn &| Sets wind speed threshold to nnnn value (in hun-
dredths of m/s)
Value should range within 0 and 100 hundredths of
m/s (= 0…1 m/s)
Default: 20 (= 0.2 m/s)
(see Note 1)
RWC & nnnn| Reads the wind speed threshold value set in the in-
strument (in hundredths of m/s)
CWaLnnn &| Sets time interval for the calculation of average speed
and average direction to nnn value
Value should range within 1 and 600 s.
If the value is greater than 10 s, it must be an inte-
ger multiple of 10.
Default : 1 s
RWaL & nnn| Reads the time interval for the calculation of average
speed and average direction set in the instrument
CWaMn &| Sets the method for the calculation of average speed
and average direction:
If n=0: scalar mean. The average intensity is cal-
culated as average of intensities without considera-
tion of direction. The average direction is calculated
as average of directions, and expressed according
to the extended characteristic (see Note 2).
If n=1: vector mean. The average of the coordi-
nates along each measurement axis is calculated.
The average intensity and the average direction are
those determined by the two average coordinates.
Default : vector mean (n=1)
RWaM & n| Reads the method for the calculation of the average
speed and average direction set in the instrument
CCn &| Enables/disables the compass compensation
of wind speed and direction:
 Disables if n=N  Enables if n=Y
Default: Enabled (n=Y)
NOTE 1 : WIND S EED THRESHOLD VALUE
If the wind speed is very low, the determination of the direction can result inaccurate. The in-
strument allows setting the threshold value of speed below which the direction value is frozen
on the last acquired value.

HD53LS - 14 - V1.3
NOTE 2 : WIND DIRECTION EXTENDED CHARACTERISTIC
With 0÷359° wind direction measuring range, the analog output continues to oscillate between
maximum and minimum scale if the direction continues to slightly fluctuate around 0°:
This effect can be reduced through the extended ("wrap-around") characteristic of wind direc-
tion. In this mode, the wind direction is considered as corresponding to 0÷539° range instead
of 0÷359°. The wide output fluctuation occurs the first time that the wind direction goes from
0 to 359°; if later the “physical” direction goes back to 0°, the analog output will always re-
main around 360°. Using the extended characteristic, the behavior of the above graph changes
into the following:
If 539° value is exceeded in extended mode, the output goes to the value corresponding to 180°.
The table below shows the correspondence between the value of the analog output and the di-
rection of the wind in the two modes.
Wind
direction
…20mA output 0…1V output 0…5V output 0…10V output
standard extended standard extended standard extended standard extended
0° 4.00 4.00 0.00 0.00 0.00 0.00 0.00 0.00
180° 12.00 9.33 0.50 0.33 2.50 1.67 5.00 3.33
360° 20.00 14.67 1.00 0.67 5.00 3.33 10.00 6.67
540° -- 20.00 -- 1.00 -- 5.00 -- 10.00

HD53LS - 15 - V1.3
Analog outputs (only HD53LS.S):
Command Reply Description
CAFxnn &| Sets offset and direction of the analog output
x (x=1 or 2) to:
Standard if nn=00
[ex. 4…20 mA , 0...1 V , 0...5 V , 0...10 V]
Without offset if nn=01
[ex. 0…20 mA]
With offset if nn=02
[ex. 0.2...1 V , 1...5 V , 2...10 V]
Inverted if nn=04
[ex. 20…4 mA , 1...0 V , 5...0 V , 10...0 V]
Inverted without offset if nn=05
[ex. 20…0 mA]
Inverted with offset if nn=06
[ex. 1...0.2 V , 5...1 V , 10...2 V]
Default : Standard (nn=00)
RAFx & nn| Reads offset and direction setting of the analog
output x (x=1 or 2)
CAMn &| Association of the analog outputs:
If n= 0:
Output 1 = Mean wind speed
Output 2 = Mean wind direction
If n= 1 (see Note 3):
Output 1 = Instant wind speed component
along V-axis
Output 2 = Instant wind speed component
along U-axis
If n= 2 (Tunnel mode, see Note ):
Output 1 = Instant wind speed component
along
the direction indicated by
the arrow on the instrument
case
Output 2 = Instant wind direction referred
to the direction indicated by
the arrow on the instrument
case
Default : n=0
RAM & n| Reads the association of analog outputs
CAHn &| Associates full scale of wind speed analog
output to:
 5 m/s if n=0  30 m/s if n=5
10 m/s if n=1  35 m/s if n=6
15 m/s if n=2  40 m/s if n=7
20 m/s if n=3  45 m/s if n=8
25 m/s if n=4  50 m/s if n=9
Default : 50 m/s (n=9)
RAH & n| Reads the value corresponding to the wind
speed analog output full scale

HD53LS - 16 - V1.3
NOTE 3 : U,V COM ONENTS
By selecting the U and V components, the speed value associated to the initial scale of the two
analog outputs is equal to the opposite of the speed value associated to the full scale of the
outputs.
For example, if the speed full scale value is set to 50 m/s, the speed range associated to the
analog outputs is -50…+50 m/s.
NOTE 4 : TUNNEL MODE
In tunnel mode the wind direction measurement is not compensated by the magnetic compass,
but the measurement is referred to the direction indicated by the arrow on the instrument
case.
The output 2 is set to full scale value if the wind blows in the direction of the arrow, and to initial
scale value if the wind blows in the opposite direction.
The initial scale of output 1 is associated to the speed value opposite to that associated to the
output full scale.

HD53LS - 17 - V1.3
Parameters for MODBUS-RTU mode (only HD53LS.S):
Command Reply Description
CU5Annn &| Sets MODBUS address to nnn
The address should range within 1 and 247
Default : 1
RU5A & nnn| Reads the MODBUS address setting
CU5Bn &| Sets the Baud Rate for MODBUS mode to:
9600 if n=3
19200 if n=4
38400 if n=5
57600 if n=6
115200 if n=7
Default : 19200 (n=4)
RU5B & n| Reads Baud Rate setting for MODBUS
mode
CU5Mn &| Sets parity and stop bits for MODBUS
mode to:
8N1 if n=0 [No parity, 1 stop bit]
8N2 if n=1 [No parity, 2 stop bits]
8E1 if n=2 [Even parity, 1 stop bit]
8E2 if n=3 [Even parity, 2 stop bits]
8O1 if n=4 [Odd parity, 1 stop bit]
8O2 if n=5 [Odd parity, 2 stop bits]
The number of bits is fixed to 8
Default : 8E1 (n=2)
RU5M & n| Reads the setting of parity and stop bits
for MODBUS mode
CU5Wn &| Sets waiting time after transmission in
MODBUS mode to:
Immediate reception if n=0
(violates protocol)
Waiting 3.5 characters if n=1
(respects protocol)
Default : Waiting 3.5 characters (n=1)
RU5W & n| Reads the setting of waiting time after
transmission in MODBUS mode

HD53LS - 18 - V1.3
6MODBUS-RTU MODE (ONLY HD53LS.S)
In MODBUS-RTU mode, the instrument sends the acquired measurements only if specifically
requested by the C, LC or data logger.
Communication parameters should be set in the C or data logger as follows:
•Baud rate: same as the setting in the instrument (default =19200)
•Data bits: 8
•arity: same as the setting in the instrument (default = even)
•Stop bits: same as the setting in the instrument (default = 1)
Below is the list of registers.
Input Registers
Address Description Format
0 Instantaneous wind speed (x100) unsigned 16 bits
1 Instantaneous wind direction in degrees (x10) unsigned 16 bits
8 Compass angle in degrees (x10) Unsigned 16 bits
10 Average wind speed (x100) unsigned 16 bits
11 Average wind direction in degrees (x10) unsigned 16 bits
14 Wind direction in degrees (x10) with extended feature
(see page 14)
unsigned 16 bits
15 Wind speed (x100) along V-axis unsigned 16 bits
16 Wind speed (x100) along U-axis unsigned 16 bits
17 Status register: bit0=1  Speed measurement error unsigned 16 bits
18 Wind speed unit of measurement
0  m/s, 1  cm/s, 2  km/h, 3  knot, 4  mph
unsigned 16 bits
21 Wind Gust intensity (x100) unsigned 16 bits
22 Wind Gust direction in degrees (x10) unsigned 16 bits
N te: the wind speed measurement value is expressed in the unit set in the instrument.
The Wind Gust measurement is determined by continuously calculating the wind speed aver-
ages in a time interval equal to 3 seconds, and detecting the maximum value of the calculated
averages over the time elapsed between the current reading command and the previous read-
ing command (the Wind Gust measurement is reset after each reading command).

HD53LS - 19 - V1.3
7INSTRUMENT STORAGE
Instrument storage conditions:
•Temperature: -40...+65 °C.
•Humidity: less than 90 %RH no condensation.
•In storing, avoid locations where:
•There is a high humidity level.
•The instrument is exposed to direct sunlight.
•The instrument is exposed to a high temperature source.
•There are high vibration levels.
•There is presence of vapor, salt and/or corrosive gas.
8SAFETY INSTRUCTIONS
General safety instructions
The instrument has been manufactured and tested in accordance with the safety standard
EN61010-1:2010 “Safety requirements for electrical equipment for measurement, control and
laboratory use” and has left the factory in perfect safety technical conditions.
The instrument proper operation and operating safety can be ensured only if all standard safe-
ty measures as well as the specific measures described in this manual are followed.
The instrument proper operation and operating safety can be ensured only in the climatic con-
ditions specified in this manual.
Do not use the instrument in places where there are:
•Rapid ambient temperature variations that may cause condensation.
•Corrosive or flammable gases.
•Direct vibrations or shocks to the instrument.
•High-intensity electromagnetic fields, static electricity.
If the instrument is moved from a cold place to a hot one, or vice versa, condensation for-
mation can cause an instrument malfunction. In this case, you will have to wait for the instru-
ment temperature to reach ambient temperature before turning the instrument on.
User obligations
The instrument operator shall follow the directives and regulations below that refer to the
treatment of dangerous materials:
EEC directives on workplace safety
National low regulations on workplace safety
Accident prevention regulations

HD53LS - 20 - V1.3
9ACCESSORIES ORDERING CODES
CP52… Connecting cable with 19-pole M23 female free connector on one end, open
wires on the other. Available lengths: 5 m (C 52.5), 10 m (C 52.10), 15 m
(C 52.15), 20 m (C 52.20), 30 m (C 52.30), 50 m (C 52.50) and 75 m
(C 52.75).
RS52 Serial connection cable with built-in USB/RS232 converter. USB connector for
the C and screw terminals on the instrument side.
HD2005.20 Tripod with adjustable legs for installing environmental sensors. Material: ano-
dized aluminium. Max. height 225 cm. It can be fixed on a flat base with
screws or to the ground with pegs. Foldable legs for the transport.
HD2005.20.1 Tripod with adjustable legs for installing environmental sensors. Material: ano-
dized aluminium. Max. height 335 cm. It can be fixed on a flat base with
screws or to the ground with pegs. Foldable legs for the transport.
CP52.C Additional 19-pole M23 female free connector.
DELTA OHM metrology laboratories LAT N° 12 are ISO/IEC 17025 accredited by ACCREDIA
for Temperature, Humidity, Pressure, Photometry / Radiometry, Acoustics and Air Velocity.
They can supply calibration certificates for the accredited quantities.