Star Meter CWDZ81 Instruction Manual

An instruction manual
CWDZ81 Air duct temperature transmitter
Typical application
Measurement of Pipeline
Temperature in Ventilation
and Air Conditioning System
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 CWDZ81 is suitable for temperature
measurement of flowing gas. 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.
The purchased model is suitable for certain gas or liquid medium as
described in the measurement samples. The user must ensure the
compatibility of contact media and transmitter.
Warning!
！
Inappropriate use may lead to danger!
2.Product overview
CWDZ81 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 CWDZ81 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: Pipe material 304 stainless steel (contact)
Slider flange ABS engineering plastic (contact)
Housing ABS engineering plastic
Overall weight: 150g
Measuring range: -50～100℃
Supply voltage: 12～36VDC
output signal: 4～20mA、RS485 （Standard Modbus-RTU protocol）
measurement accuracy:0.5%FS
Ambient temperature: -40～85℃
Stability: ±0.1% FS/year
Protection level: IP54
Working conditions: Ambient temperature-40～85℃
environment humidity0%～95%RH（No condensation）
Response time:18s（meets theIEC60751,0.4m/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
supply voltage）}Ω
Load resistance （4～20）mA DC
RL（Ω）
1200
1000
800
600
400
200
9
6.Dimensions
4mm
Φ4.2*4
Working zone
Us（VDC）
15 20 25 30 36 Working volt
Figure5-1
S19
39.5mm
Sliding flange
S24
Φ6mm
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)
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.
!i)
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）.
j)
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.
k)
Users should not disassemble themselves in order to avoid
product damage.
8.
Wiring diagram
1、Positive power supply（V+）
2、Negative power supply（V-）
、Earthing
P Red line（V+）
Transmitter
Collecting device
（V-）
Blue line
Current output wiring diagram 8-4 (two-wire system)
1、
Positive power supply
2、RS485A（A）
3、
Negative power supply
、RS485B（B）
Power supply（VDC）
（V+）
Red line +
P
Transmitter
（V-）
Blue line
Collecting device
（A）
Yellow line
（B）
White line
RS485 (digital signal) 8-6 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
Power supply(VDC)
+ -
U
A
（V+）
（V-）
-
U
PC
device