Sino Instruments HS710 User manual

User manual
HS710
Hydraulic Comparator

2
The operating instructions are parts of the products and must be kept in
the immediate vicinity of the instrument and readily accessible to skilled
personnel at any time.
Skilled personnel must have carefully read and understood the operating
instructions prior to beginning any work.
The manufacturer's liability is void in the case of any damage caused
by using the product contrary to its intended use, non-compliance with
these operating instructions, assignment of insufciently qualied skilled
personnel or unauthorized modications to the instrument.
HUAXIN reserve the rights to change the contents or form of these
operating instructions at any time without prior notice having been given.
Claim
......warns you against actions that can cause injury to people or
damage to the instrument.
......points out useful tips,recommendations and information for
efcient and trouble-free operation.
In order to protect your products,your own and others safety,please read
this manual carefully before your operation,otherwise it may cause trouble.
Huaxin is not liable for any safety problems or damages caused by misuse
or incorrect operation.
Safety information
Symbol
Warning
The system must only be operated by trained and authorised personnel
who know the manual and can work according to them.
Any operation not included in the following instructions or outside the
specications must not be attempted.
Don’t use and disable the Product if it is damaged.
Operate by professional
Use the product only as specied
Please use non-damage goods
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Disassembling may cause physical injury or equipment damage.Only
qualied technicians are allowed to x the equipment.Please call our
service staff for repair instruction and guidance if there would be
anything wrong.
No Disassembling
Only provide pressure for oil gauge.if you use the item to calibrate
water pressure gauges,maybe water will enter into it and that couldn’t
generate pressure anymore.Meanwhile that may pollute the gauges
under test.
If this equipment will be in idle for a long time, please shut off the relieve
valve and provide a little pressure.In order to avoid the air enter into the
item inside.that will affect the system stability when you use it nexe time.
Don’t calibrate water pressure gauge
Store the item with pressure
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Labelling
Huxin Instrument(Beijing)Co.,LTD
Model
Range
Product
No.
Date
(0-700)bar
Hydraulic comparator
140865011
2014.08
HS710
Manufacturer
Model
Product name
Pressure range
Serial number
Date of manufacture

4
Claim
Safety
1.Summary 1
2.Technical Specication 1
3.Components 2
4.Working principle 3
5.Operation 4
6.Troubleshooting 5
7.Maintenance 6
8.Support 6

1
1.Summary
2.Technical Specication
Model:HS710 Hydraulic comparator
Generated pressure range:(0~600)bar,(0~700)bar
Working media:25#transformer oil
Adjust resolution:0.001bar(0.1kPa)
Material:Body:Stainless Steel/Aluminium Seals:Buna-N
Output interface connection:M20×1.5Female
Output quantity:Three
Package: Specialized cartons and foam wrap
Dimensions:430L×330W×170H(mm)
Weight:14.9kg
HS710 Hydraulic comparator adopts advanced stainless steel,with bench-top
structure and designed to generate pressure range up to 700bar.The sliding block
structure for screw pump design makes the high pressure operation more easy
and save labor,and saves operation space without screw outside.The special
F-adjust valve adjusts the exact pressure value and calibrate 250kpa pressure
instruments.The detachable oil cup is easy to clean and maintenance,checking
work medium timely from outside.3pcs outputs with quick coupling makes
it calibrated pressure instruments together.The widely calibrates pressure
instrument in the laboratory.
HS710 provides pressure measurement for calibrating pressure (differential
pressure)transmitter,precision pressure gauge, general pressure gauge and
other pressure instruments. It can be extensively used in power,chemical,
petrol,metallurgy, metering,military industry,etc.
Adopts advanced stainless steel,bench-top structure
Detachable oil cup is easy to clean and maintenance
Fast connection,quick pressurizing and easy operation
It is used for calibrating all kinds of oil gauges
Characteristics
Functions

2
6
7
Output
There are three outputs.It could calibrate two gauges once time.
Ventilation nut
Unscrew the nut before use;tighten it up during storage and transport.
F-adjust valve
To realize the ne adjustment of pressure value.(clockwise to increase
pressure)
Lead Screw
Increase pressure by turning the lead screw clockwise,decrease pressure
by turning the lead screw anti-clockwise.
Plugs
Tighten it up when not in use,it could prevent oil-leaking by blocking
the output.
Hand pump
Generate pressure by running the handle up and down repeatedly, to
realize pre-pressure.
Relieve valve
Have to close before pressure generation(clockwise).Slowly open it to
relieve the pressure(anti-clockwise).
Oil cup
The container is used for the work medium, it can be take off anti-
clockwise from the hand pump.
Shut-off valve
Cut off the connection between hand pump & lead screw.Disconnect by
turning it clockwise,open up by turning it anti-clockwise.
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2
3
4
8
9
5
3.Components
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1
7
4
6
8
9
2
3

3
4.Working principle
Output
F-adjust valve
Check valve
Shut-off valve
Relieve
valve
Hand pump
Lead
screw
Oil cup
HS710 is composed of hand pump,lead screw,F-adjust valve,relieve valve,
shut-off valve,oil cup and outputs,etc.The pressure gauge can be installed
quickly,and easy to prepressurize by running hand pump up and down,
then compress the work medium by turning lead screw clockwise(anti-
clockwise),that could realize the pressure increasing(decreasing)secondary.
Fine adjust the F-adjust valve to reach desired point more accurately.

4
Record 0bar record ,and close the relieve
valve: Providing pressure 20bar by turning
hand pump up and down and stop pre-
pressure.
D
Put HS710 on the level. Turn the relieve valve
and shut-off valve anti-clockwise to open them,
unscrew ventilation nut.Remove the plug of
the outputs, connect the standard gauge and the
gauge under test to outputs.
Set F-adjust valve to the mid
position,and for lead screw,turn
all the way out.
B C
Close shut-off valve clockwise. Rotate the
Lead screw clockwise and adjust the F-adjust
valve to get exact values .Pressure rising &
stabilize to 50bar,100bar,150bar,200bar,250bar
in turn, meanwhile,record the data.
E
5.Operation
Take pressure gauge 250bar(25Mpa) as example.
(The standard points:0bar 50bar 100bar 150bar
200bar 250bar)
Please fill the work medium (25#transformer
oil) from vent before calibration .The oil position
should be at least 2/3 of the whole oil cup. Open
the ventilation nut as the PIC below.
AOpen
Open(anti-
clockwise)
Open(anti-
clockwise)
Turn all the way out
anti-clockwise
Pressurizing by
turn it clockwise
Turn it clockwise
until closed
In the mid position
Fine adjust Close
Up and down
Connect
Unscrew

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6.Troubleshooting
There may be some faults of HS710 mentioned below after long term
use,the maintainer can analyse and eliminate problems by these methods.
Make sure to release all pressure of system.It is forbidden to disassemble
and repair the product with pressure.
Remark:
1.Hold the lead screw,turn in and out to complete ne adjustment.
2.Run the hand pump up-down slowly&slightly, to pre-pressurize(15~20)bar.
3.Please put on the plugs after all the tests have been nished.
4.Above pictures are just for reference.
NOTES:
1.There must be no pressure in the system when removing pressure gauge .
2.Replace the O-rings regularly.
3.The working media is oil.Pls don't mix with other liquid.
Change gauge under test and
calibrate next one.
H
Loop process: Decrease pressure by
turning lead screw anti-clockwise (or
together with relieve valve),and adjust the
F-adjust valve to get exact values. Record
the data when the pressure stabilize on
200bar,150bar,100bar,50bar and so on.
Finish the loop process and open the relieve
valve to release the pressure. Then open the
shut-off valve.
F
G
Depressurizing by turn
it anti-clockwise
Fine adjust
Open
Open Change gauge

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8.Support
The product specications and other information contained in this manual
are subject to change without notice.if you have any questions,please call
our services hotline:[phone] or Tel:[phone]
7.Maintenance
7.1.If this equipment will be in idle for a long time, please turn the lead
screw clockwise till it could not move anymore,shut off the relieve valve
and put on the plugs.Provide a little pressure by running the hand pump 2-3
times,then tighten the ventilation nut.
7.2.If HS710 needs to take a long distance transport,please put on all plugs
to prevent leakage of oil.It is necessary to pack with specialized cartons and
foam wrap.
7.3.Replace working medium regularly.
7.4.The working medium is 25#transformer oil or any oil that can be used
for calibrating gauges.
Faults Cause Solution
Oil leakage
The O-ring seal is loose or damaged Replace the O-ring
There is large damage on the sealing faces
of gauge under test Check the sealing
Hand pump couldn't
generate pressure
No enough medium in oil cup Add medium
The internal O-ring is damaged Replace the O-ring
The gauge under test has huge capacity Increase
prepressing times
The pressure is
instability,the
standard gauge
depressurized
quickly
Check the instrument to make sure there is
no leakage of oil.Otherwise the O-ring is
damaged or there is connection loosening
Replace O-ring,or
reassemble
Pressurize without gauge under test.if
the instrument doesn’t leak pressure,this
indicates gauge under test has problem.
Otherwise there is problem with device or
standard module.Check the module and
device separately
Replace standard
gauge or gauge
under test

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HUAXIN Products series
Add:No.11,Chuangxin road,Changping,Beijing,102200,China.
Tel:[phone]/ Fax:[phone]
Web:http://www.sino-instruments.com
HUAXIN INSTRUMENT(BEIJING)CO.,LTD
E-mail:[email protected]/