HVTest HTJL-H User manual

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Dear Client
Thank you for Purchasing our HTJL-H High Precision SF6
Gas Leak Detector. 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: [phone]
After Service Hotline:[phone]
Fax: [phone]
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
ground pole of the shell must be grounded. To prevent electric

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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
Warning:............................................................................................ 6
I. Product introduction.................................................................. 6
II. Technical data.............................................................................7
III. Product structure......................................................................7
IV. Operation procedure and method....................................... 8
V. Adjustment method...................................................................9
VI. Announcements......................................................................11

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Warning:
The user has to confirm whether the vacuum pump has been filled with oil
before any use of the instrument except there is a special announcement.
Please add the oil to the pump or it will be damaged. Tear down the outer
cover of the main engine and refer to the instruction of the vaccum pump to
add the oil.
When the oil is added, the instrument cannot be overturned in the process
of transporting.
I. Product introduction
HTJL-H SF6 Gas leak Detector’s working principle is that when the
concentration of sulfur hexafluoride in the air changes its degree of ionization
under an electromagnetic field of high frequency varies at the same time. The
concentration degree of sulfur hexafluoride can be displayed by a detection of
the degree of ionization.
This instrument is a small vacuum pump with its searching unit and main
engine separated. Though small and light, it has a high sensitivity and stability.
Moreover, it responds fast and produce no toxic gas in its component(esp. the
searching unit).
This instrument has a new function of alarming setting. When the gas to
be detected has a concentration degree more than or equal to the
pre-determined value, it alarms automatically.
This instrument is used exclusively in the detection of sulfur hexafluoride
equipment or volume’s leakage by the industry of electricity, railway, electronic
production, chemical engineering, fire equipment and atomic physics research
institute, etc. It can do qualitative and quantitative detection quickly and
accurately.

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II. Technical data
Range of measurement（SF6）： 0.01ppm～500ppm（Volume ratio）
Response time：not more than 3 seconds
Indication pattern：crystal digital display harmony, light signal alarm
Setting range of alarming：0.01ppm～500ppm（Volume ratio）
Pumping speed of vacuum pump 0.5 litre/second
Length of the vacuum tube：4 m
Continual working time：not more than 3 hours
Working condition ：alternating current power supply 220V 50Hz
Environment temperature 7℃-40℃
Relative humidity not more than 85%
Rate of work：approx. 180W
Total weight ：approx. 30kg
III. Product structure
1.The layout of each control unit on the instrument panel is shown in the
figure (1)

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1 detection switch
2 power switch
3 power outlet
4 ac fuse (0.5A)
5 dc fuse (5A)
6 the host
Seven of the needle valve
8 handheld probe
9 LCD
10 buttons
11 ionization chamber observation window
12 gas electric tube
IV. Operation procedure and method
1. Plug in the power supply and turn on the "power switch", then the motor's
starting sound can be heard.
Turn on the "detection switch". If you can see a faint dark purple excitation light
(" initiation ") in the window above the probe, and the base value of the lower
side of the LCD screen is close to the value marked on the nozzle of the
instrument, the measurement can start.(after starting up, the large value in the
middle of the display screen is the concentration of SF6 gas detected in real
time, so it is unnecessary to check the table again. The small value below is
the base value, which is only used as a reference for the stability of the
instrument.)
3. If not, you can plug the inlet of the probe (needle valve) with your finger to
improve the vacuum of the vacuum system.If the probe is blocked within 10
seconds, wait 10 minutes and then block the probe again. The time of blocking
the probe shall not exceed 10 seconds, otherwise the relevant electronic
devices will be damaged.
4. The instrument will start up for 60 seconds and set the zero point by
self-calibration. If the zero point is not reached within 60 seconds, the probe
will be held in the air and press "cancel" to set the zero point.
5. After 10 minutes, after the instrument reaches a certain vacuum degree and
the base value is basically stable, move the probe to the place under

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inspection. If there is a gas leak, the reading on the LCD screen will increase to
show the specific concentration of volume.
6, press “√” key to enter setup interface can change the emergency alarm
value (using “◄”、“►”The key changes).When the volume ratio is greater
than the alarm point, the device will emit a beeping alarm.
V. Adjustment method
1. Making up different concentration degree sulfur hexafluoride
（1）Gas distribution: Needle cylinder is used;
（2）Standard gas: use qualified pure sulfur hexafluoride to make up six
groups of sample gas with concentration degree of 0.01, 0.1, 1, 10, 100 and
500.

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（3）Operation: Extract 1 millilitre of pure sulfur hexafluoride with a
one-litre cylinder from the steel bottle. Inject it into 100-millilitre cylinder and
dilute it with air outdoors. The concentration degree is 10000ppm. Again,
extract 5 millilitre 10000ppm sulfur hexafluoride with a twenty-milliliter from a
100-millilitre cylinder and inject it into another 100-millilitre cylinder. Dilute it
with air outdoors to 100 millilitres. Its concentration degree is 500ppm. The
same operation can be applied for 100ppm, 10ppm, 1ppm, 0.1ppm and
0.01ppm. Each should be marked to be tested.
2. Demarcation of the leakage detector:
When the instrument is shut down, press OK to switch on the
detector( enter the interface of detection demarcation). After 15 minutes the
machine gets stable. Press & at the same time to enter
demarcation interface. At this time the demarcation number is shown on the
interface. Press + or –to alter the number of points which need to be
demarcated. Press OK and then demarcate the first point. Input OPPM and
then press OK. Input 1010, which is the first point’s collecting number. Press
OK and then QUIT to enter the demarcation interface. Thus the demarcation of
the first point is finished. The detection of the prepared SF6 gas begins. Use
20-millilitre cylinder to extract 10 millilitre of the prepared sulfur hexafluoride
with different concentration degree. Take off the needle of the cylinder and
connect the intake port of cylinder and probe. The probe will take in the gas to
be detected by itself. At the moment the signal value on the lower left corner of
the LCD of the detector will increase. Record the reading when the displayed
data turns stable ( Record the seven sample gases in turn) . The interface
shows the demarcation point now. press + or –to alter the number of points to
be demarcated and press OK. Then demarcate the first point (zero point).
Input OPPM and press OK. Input the collecting number 1010 at zero point and
then press OK. Press again to alter the point number to the second
point( 0.01 PPM ) and then press OK again to input the collecting value of 0.01

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PPM sample gas. Press OK and then to go to the next point. In this way
the demarcation of all the seven points is finished ( six sample gas value and
one zero point value ). After all the sample gas’s demarcation is finished, the
user can restart the leakage detector for the next detection.
VI. Announcements
1. Please keep the body of the whole instrument clean and tidy. Avoid the
entrance of any impurities to enter the probe or the vacuum pump. The
machine should be kept in a dry and windy place to avoid humidity.
2. Since the probe needle valve has been adjusted well before it is sold,
do not adjust it in normal condition. If the place of the needle valve changed
due to any improper use or uncertain reason, the user should readjust it till the
intaking gas reaches an appropriate amount. The three adjustable
potentiometer inside the searching unit has been set for its output voltage and
signal output value before selling. In generall it doesn’t need to be adjusted
again. If there is a need to adjust it, please refer to the technical parameter of
the instrument to do it, or the inside component may be burnt. Each time when
the inside potentiometer is adjusted, the instrument has to be demarcated too.
Or else the detectiong data will not be accurate.
3. After a long-term use the O-like rubber washer at the connection point
of the needle valve gets aged. As a result, the leakage at the connection point
affects the vacuum degree. So it should be changed at once.
44. Do not overturn the detector or shake it violently. It may cause
abnormal state of the searching unit or other movable components and affects
the detector’s function.
5. If there is no signal or a snowflake screen when the detector is started,
press and then QUIT to refresh it.