Star Meter CWDZ18 Instruction Manual

An instruction manual
CWDZ18Wall mounted temperature transmitter
Typical application
Suitable for various
applications Indoor ambient
temperature measurement
1.Overview
1.1 Safety guidance
This operational manual contains important information on how to use the
transmitter correctly. The installation personnel of the transmitter should
read this manual carefully before operation. In case of further explanation
or special questions, which cannot be addressed in this manual, please
contact our company for assistance on necessary information.
Please pay attention to the warning signs on the manual!
The operator must strictly follow the safety instructions and user's
manual during operation. Furthermore, the operator should comply with the
occupational safety rules, the accident prevention guidelines, the national
standards and engineering specifications as well.
Please keep this manual in a safe place near the transmitter for easy
access.
The copyright of this operational manual is protected. This version of
operational manual was edited according to the functions of corresponding
products, the product functions and operation procedures are described as
complete as possible. If there is any error, please don't hesitate to
contact us. The company is not responsible, in regard of any fault
description or its possible consequences.
–The right to modify the technical parameters is retained–
1.2 Icon description
！ Danger! - Hazard that may result in death or serious injury.
！
Warning!- Potential hazard that may result in death orserious injury.
！ Cautious!-Potential hazard that may cause minor injury.
！ Reminder!-Potential hazard that may result in personal injury.
Tips!-Tips and information for smooth operation of the equipment.
1.3 Manual user
Warning! This manual is suitable for technicians.
！
1.4 Limit of liability
The company will not be held responsible nor provide any warranty
service, in case of transmitter damages caused by failure to follow the
instruction manual, inappropriate use, self-modification or destruction.
1.5 Instructions for use
The temperature transmitter CWDZ18 is suitable for indoor environmental
temperature measurement. Operators are responsible for checking whether the
equipment is suitable for operating conditions. If you have any questions,
please contact our sales department to ensure the correct application of
the transmitter. The Company shall not bear any responsibility for the
influence caused by improper selection.
！
Warning!
Inappropriate use may lead to danger!
2.Product overview
CWDZ18 series temperature transmitter products use PT100 as signal
measuring element, and through computer automatic testing, the temperature
compensation of zero point and sensitivity in wide temperature range is
carried out by laser resistance adjustment technology. The amplification
circuit converts the sensor signal into standard output signal, giving full
play to the technical advantages of the sensor, so that the CWDZ18 series
temperature transmitter has excellent performance. It has
anti-interference, overload, small temperature drift, high stability, high
measurement accuracy, and is an ideal temperature measurement instrument in
the field of industrial automation.
3.Working principle
Temperature transmitter is the resistance effect produced by PT100
sensor under the influence of temperature. It generates a differential
voltage signal by special processing unit conversion. This signal is
transformed into standard analog or digital signal by special amplifier.
STAR METER
24-hour service hotline：400-600-4496
星仪传感器
4. Product Features
STAR METER
a) Wide Voltage Supply, Nonlinear Correction, High Precision
b) Small size, light weight and easy installation
c) Strong anti-lightning, frequency-cut jamming design and
anti-jamming ability
d) Connection Reverse and Overvoltage Protection and Current
Limiting Protection
5.Technical parameters
Measuring media : gas
Overall material: Protective Pipe Material
Shell ABS Engineering Plastics
Overall weight : 110g
Measuring range ： -50～100℃
Supply voltage: 12～36VDC
4～20mA、RS485 （Standard Modbus-RTU Protocol）
O u t p u t s i g n a l :
Accuracy class: 0.5%FS
Stability : ±0.1% FS/year
Protection lever : IP65
Working conditions: Ambient humidity0%～95%RH（No condensation）
Response time: 18s（accord withIEC60751,0.4m/swind speed，10℃Stepping
）
Power range : Current type≤0.02Us(W)
Digital type≤0.015Us(W)
Note:Us=Supplied voltage
Load characteristics: Current type load≤{（Us-9）/0.02（Us=Power
Load resistance （4～20）mA DC
RL（Ω）
1200
1000
800
600
400
200
9
6.Dimensions
304 Stainless Steel
Working zone
Us（VDC）
Working volt
15 20 25 30 36
Figure5-1
98mm
86mm
φ3*2
Figure 6-1
33.5
Figure 6-2
1
7.Installation and precautions
！ Warning!
a)
Installed without pressure nor power supply.
Warning!
！
b)
Transmitter should be installed by technician who read and
understood this operational manual.
Danger!
！
c)
This product is not explosion-proof, using in explosive area may
cause serious injury and significant loss.
Warning!
！
d)
It is prohibited to measure media that is not compatible with
the transmitter.
e)
Please check if the package is in good order when receiving
the product, confirm the transmitter model and specifications.
! f)
No modification or change can be made to the device.
! g)
Handle with care, do not throw, do not force during
installation of transmitter.
h)
Transmitters should be placed as vertically as possible, and
sensors should be placed below the transmitter (the font on the
transmitter is in the positive direction).
i)
Installation height is the environmental area of human sitting
height or main measurement requirements.
j)
Avoid installing in a zone which is easy to heat transfer and
will directly cause temperature difference with the area to be
measured, otherwise the temperature measurement will be inaccurate.
k)
Installed in a stable environment, avoid direct lighting, away
from windows and air conditioning, heating and other equipment, avoid
direct to windows, doors.
l)
Keep away from high-power interference equipment as far as
possible to avoid inaccurate measurement, such as frequency converter,
motor, etc.
m)
If the transmitter is installed in a bad site and will
encounter dangerous damage such as lightning strike or overvoltage, we
recommend that users protect against lightning strike and overvoltage
between distribution box or power supply and transmitter.
!n)
This product is a light current device, it must be laid
separately from high current cables during wiring, and comply with
relevant national wiring standard (GB/T50312-2016）.
o)
Ensure that the supply voltage of the power supply meets the
requirements of the power supply of the transmitter. Ensure that the
measured temperature is within the range of the transmitter.
p)
Users should not disassemble themselves in order to avoid
product damage.
8.
Wiring diagram
V+/V24
1、Positive power supply（
V-/GND
2、Negative power supply（
、Earthing
Power supply(VDC)
P
Red line（V+）
+
Transmitter
Collecting device
（V-）
Blue line
Current output wiring diagram 8-1 (two-wire system)
1、 Positive power supply （V+）
2、RS485A（A）
3、 （V-）
Negative power supply
4、RS485B（B）
、
Earthing
Power supply（VDC）
（V+）
Red line +
P
Transmitter
（V-）
Blue line
Collecting device
（A）
Yellow line
（B）
White line
RS485 (digital signal) 8-2 output wiring diagram (four-wire system)
Representing the shielded wire, all marked grounding points
must be effectively grounded.
Only the current output has reverse connection protection
(no damage but does not work), current limiting and voltage limiting
protection. Reversed connection of all other output signals can cause
damage to the transmitter.
version number19.5.18
Executive standard JB∕T 12599-2016
www.star-sensor.com
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