Wuhan Guide HTWS-V User manual
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Dear Client
Thank you for Purchasing our HTWS-V Dew Point Meter.
Please read the manual in detail prior to first use, which will help
you use the equipment skillfully.
Our aim is to improve and perfect the
company's products continually, so there may be
slight differences between your purchase equipment
and its instruction manual. You can find the changes
in the appendix. Sorry for the inconvenience. If you have further
questions, welcome to contact with our service department.
The input/output terminals and the test column
may bring voltage, when you plug/draw the test wire or
power outlet, they will cause electric spark. PLEASE
CAUTION RISK OF ELECTRICAL SHOCK!
Company Address:
T4，No. 41, High-tech 2 Road，East Lake High-tech Development Zone，
Wuhan
Sales Hotline: 86-27- 87457960
After Service Hotline:86-27- 87459656
Fax: 86-27- 87803129
E-mail: [email protected]
Website: www.hvtest.cc
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SERIOUS COMMITMENT
All products of our company carry one year limited warranty
from the date of shipment. If any such product proves defective
during this warranty period we will maintain it for free. Meanwhile
we implement lifetime service. Except otherwise agreed by
contract.
SAFETY REQUIREMENTS
Please read the following safety precautions carefully to avoid
body injury and prevent the product or other relevant subassembly
to damage. In order to avoid possible danger, this product can only
be used within the prescribed scope.
Only qualified technician can carry out maintenance or repair
work.
--To avoid fire and personal injury:
Use Proper Power Cord
Only use the power wire supplied by the product or meet the
specification of this produce.
Connect and Disconnect Correctly
When the test wire is connected to the live terminal, please do
not connect or disconnect the test wire.
Grounding
The product is grounded through the power wire; besides, the
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ground pole of the shell must be grounded. To prevent electric
shock, the grounding conductor must be connected to the ground.
Make sure the product has been grounded correctly before
connecting with the input/output port.
Pay Attention to the Ratings of All Terminals
To prevent the fire hazard or electric shock, please be care of
all ratings and labels/marks of this product. Before connecting,
please read the instruction manual to acquire information about the
ratings.
Do Not Operate without Covers
Do not operate this product when covers or panels removed.
Use Proper Fuse
Only use the fuse with type and rating specified for the product.
Avoid Touching Bare Circuit and Charged Metal
Do not touch the bare connection points and parts of energized
equipment.
Do Not Operate with Suspicious Failures
If you encounter operating failure, do not continue. Please
contact with our maintenance staff.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in Explosive Atmospheres.
Ensure Product Surfaces Clean and Dry.
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－Security Terms
Warning: indicates that death or severe personal injury may
result if proper precautions are not taken
Caution: indicates that property damage may result if proper
precautions are not taken.
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Contents
I. Overview......................................................................................... 6
II. Application..................................................................................... 6
III. Products features........................................................................ 6
IV. Product parameters.................................................................... 8
V. Panel structure..............................................................................9
VI. Operating principle................................................................... 10
VII. Operational approach............................................................. 10
VIII. Software operation.................................................................18
IX. Failure phenomenon and trouble shooting.......................... 26
X. Precautions.................................................................................26
XI. Packing list.................................................................................27
Appendix 1. Packing of transition joint of dew point meter..... 28
Appendix 2. Measurement requirement of water content in SF6
circuit breaker..................................................................................29
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I. Overview
HTWS-V Dew Point Meter is researched and designed by using imported
high-precision dew point sensor and the latest digital circuit control technology,
which is the intelligent precision instrument to measure the moisture content of
the SF6 gas
The instrument uses intelligent self-calibration technology, wide
measuring range, fast response, high accuracy, good linearity, dynamic display
measurement curve. While the instrument with automatic dryer, can greatly
shorten the measuring time.
II. Application
The device is suitable for the dew point value of SF6 gas measurement,
can also measure the dew point value of air, nitrogen, the inert gas and any
non-corrosive gases, especially used for the electric power, petrochemical,
metallurgy, environmental protection, scientific research institutes and other
departments, with high cost performance.
III. Products features
1. High stability: Under severe interference conditions, the measurement
data can be stabilized within ± 0.5 ℃, with excellent long-term stability, good
repeatability.
2. High precision: Adopts imported with original packaging
high-performance dew point sensor and high-speed 12 Σ-ΔAD
analog-to-digital converter (ADC), the highest resolution reaches 0.1 ℃, fully
meet the requirements of the actual measurement. The measurement results
are accurate and reliable within full range. Wide measuring range, fast
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response, stable and reliable.
3. Intellectualized: Boot self-calibration, the sensor probe can be
automatically calibrated zero, automatically eliminate systematic errors
introduced by zero drift, to ensure the accuracy of measurement.
4. Multiple protections: With oil filters, not affected by dust particles and
most of chemical contamination, to protect sensor resistance to oil, very
suitable for use in industrial environments. Dryer can effectively protect the
dew point sensor probe, prolong the service life of the sensor.
5. Rapid to save gas: after boot into measurement, the measurement time
of dew point is 3 ~ 5min. First use need to dry pipelines and sensors, slightly
longer time.
6. Powerful function: 4.7 inch colors touching LCD display. Direct display
dew point value (℃), micro-water value (uL / L), date and time, dynamic
display dew point measuring curve. Real-time save measurement data, can
store up to 100 sets of measurement data.
7. Communication: RS232 interface can be connected to PC serial port,
convenient for further process data.
8. Easy to use: Adopts imported self-locking connectors, easy to plug in or
draw out, safe and reliable, no leakage. Touching buttons easy to operate and
improve work efficiency. Built-in rechargeable lithium battery, small in size, light
in weight, easy to carry.
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IV. Product parameters
Measurement
Range
Dew point value
－80℃～+20℃
Micro water value
0～19999uL/L
Accuracy
±0.5℃（－60℃～＋20℃）
±1.0℃（－80℃～－60℃）
Resolution
Dew point value
0.1℃
Micro water value
1uL/L
Response time
(+20℃,0.1Mpa)
63% need 5s, 90% need 45s (-60 ℃~ +20 ℃)
63% need 10s, 90% need 240s (+20 ℃~ -60 ℃)
Sampling flow
rate
0.6L/min±20%
Pressure range
0～1.0Mpa
Temperature
－20℃～＋60℃
Humidity
0～100%RH
Storage
Temperature
－20℃～＋80℃
Charging time
4 hours
Dimension
250×150×300mm3
Weight
3.5kg
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V. Panel structure
1. The front panel layout of instrument is shown in Figure 1.
Figure 1 the front panel layout
①LCD screen
②Flow adjustment
③Power switch
④Status indicator
2. The back panel layout of instrument is shown in Figure 2
Figure 2 the back panel layout
①Gas inlet
②RS232 interface
③Charging hole
④Gas outlet
Note: at the same time press the bracket adjust button on both sides, can
adjust the angle of the bracket.
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VI. Operating principle
When measured gas into the sensor sampling chamber, the trace
moisture in the gas is adsorbed to the sensor, the sensor converts the change
into electrical signal, to be processed by the microprocessor, and finally display
on the LCD screen.
The device is composed of the gas path section, the sensor section, the
signal processing section and the liquid crystal display output section.
Operating schematic diagram as shown in Figure 3
Figure 3 operating schematic diagram
VII. Operational approach
1. LCD display description
The instrument adopts the 4.7-inch high-resolution color touch LCD
display; it can also be clearly displayed even in strong sunlight. Click on touch
screen button to complete the parameter setting, data storage and other
operations, the test results are displayed on the LCD screen. Graphics clear,
beautiful, easy to operate.
2. Connect to SF6 devices
Gas inlet
Flowmeter
Sensor
Gas outlet
AD conversion
Signal amplification
Time clock
Save
Communication
LCD display
Touch button
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