SINO HS700 User manual

User manual
HS700
Vacuum 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.
Operate by professional
Use the product only as specied
1
2
Don’t use and disable the Product if it is damaged.
Please use non-damage goods
3

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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.
The item belongs to non-oil equipment, if you use the item to calibrate
oil gauge,there will be oil left behind in the system,and it will not
provide pressure anymore. Meanwhile that may pollute air gauge.
No Disassembling
Don’t calibrate oil pressure gauge
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Labelling
Huxin Instrument(Beijing)Co.,LTD
Model
Product
Range
No.
Date
(-50-50)kPa
15012813
2015.01
HS700
Vacuum Comparator
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 2
5.Operation 3
6.Troubleshooting 5
7.Maintenance 5
8.Support 5

1
1.Summary
2.Technical Specication
Model:HS700 vacuum comparator
Generated pressure range:(-0.5-0.5)bar
Working media:Air
Adjust resolution:0.01mbar(1Pa)
Material:Body:transparent plexiglass Output:stainless steel
Aluminium Seals:Buna-N
Output interface connection:M20×1.5Female
Differential port for connecting gauges under test by hose
Output quantity:Two
Package:specialized cartons and foam wrap.
Dimensions:260L×180W×60H(mm)
Weight:2.55kg
HS700 vacuum comparator is made from high quality and transparent
plexiglass material.The operation of piston inside can be seen clearly.The
whole structure is more intuitive and compact. This instrument is specially
designed to generate micro pressure from -0.5bar to 0.5bar.The F-adjust
valve could accomplish 0.01mbar (1Pa)pressure resolution. HS700 is a very
stable micro pressure calibrator.the design of relieve valve makes the system
return to zero pressure quickly. Two standard pressure outputs are easy
to connect gauges under test without using the wrenches. The differential
port also may connect gauges under test by hose.It widely calibrates micro
pressure instruments in eld and laboratory.
HS700 provides pressure measurement for calibrating micro pressure
instruments in eld and laboratory.It can be extensively used in power,chemical
,petrol,metallurgy,metering,military industry,etc.
Adopts high quality and transparent plexiglass material
The whole structure is more intuitive and compact
Simple operation, convenient maintenance
Pressure resolution:0.01mbar(1Pa)
Characteristics
Functions

2
6
Plugs
Tighten it up when not in use,it could prevent foreign matter by blocking
the output.
Output
There are two outputs.one is designed for standard gague,the other for
gauge under test.
Differential port
It is used for connecting with differential pressure gauge.
Relieve valve
Have to close before pressure generation(clockwise).Slowly open it to
release the pressure(anti-clockwise).
F-adjust valve
To realize the ne adjustement 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.
1
2
3
4
5
3.Components
6
4
3
2
1
5
4.Working principle
HS700 vacuum comparator is composed by lead screw,F-adjust valve,relieve
valve,differential port,and output,etc.The pressure gauge can be installed
quickly.Turn lead screw clockwise(anti-clockwise)to compress(pull) the

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work medium.To increase or decrease pressure by changing volume of air.
Fine adjust the F-adjust valve to reach desired point more accurately.
5.Operation
Put HS700 on the level;Turn the relieve valve anti-clockwise to open it.
Put HS700 on the level;Turn the relieve valve anti-clockwise to open it.
Take pressure gauge 0.5bar as example(The standard points:0kPa 0.1bar
0.2bar 0.3bar 0.4bar 0.5bar)
Take vacuum pressure gauge as example(The standard points:0kPa -0.1bar
-0.2bar -0.3bar -0.4bar -0.5bar)
For example(1):
For example(2):
A
A
B
B
C
C
D
D
E
E
F
F
G
H
Remove the plugs of outputs.Connect the standard gauge and the gauge under test to the two
output interfaces separately,it must rm in place.Otherwise,it will be leakage.
Set F-adjust valve to the mid position ,and for lead screw,turn all the way out.
Record 0bar record,and close the relieve valve.
Rotate the lead screw clockwise and adjust the F-adjust valve to get exact values.Pressure
rising & stabilize to 0.1bar,0.2bar,0.3bar,0.4bar,0.5bar in turn,meanwhile, record the data.
Finish the loop calibration and open the relieve valve to release the pressure. Then open
the shut-off valve.
Loop calibration: Decrease pressure by turning lead screw anti-clockwise,and adjust
the F-adjust valve to get exact values.Record the data when the pressure stabilize on
0.4bar,0.3bar,0.2bar,0.1bar.
Change gauge under test and calibrate next one.
Remove the plugs of outputs.Connect the standard gauge and the gauge under test to the two
output interfaces separately,it must rm in place.Otherwise,it will be leakage.
Set F-adjust valve to the mid position ,and for lead screw,turn all the way in.
Record 0bar record,and close the relieve valve.
Rotate the lead screw anti-clockwise and adjust the F-adjust valve to get exact values.Pressure
rising & stabilize to -0.1bar,-0.2bar,-0.3bar,-0.4bar,-0.5bar in turn,meanwhile, record the data.
Loop calibration: Turn lead screw clockwise,and adjust the F-adjust valve to get exact
values.Record the data when the pressure stabilize on -0.4bar,-0.3bar,-0.2bar,-0.1bar.

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Finish the loop calibration and open the relieve valve to release the pressure. Then open
the shut-off valve.
Change gauge under test and calibrate next one.
Remark:
1.Turn F-adjust valve slowly to complete ne adjustment.
2.Please take out gauges and put on the plugs after all the tests have been
nished.
NOTES:
1.There must be no pressure in the system when removing pressure gauge.
2.Replace the O-rings regularly.
3.The item is non-oil equipment.please don’t mix any liquid.
6.Troubleshooting
There may be some faults of HS700 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.
Faults Cause Solution
Leakage
Relieve valve isn’t closed when
provide pressure Close relieve valve again
O-ring in the outputs is damaged Check and replace O-ring
There is abnormal
sound when operate
lead screw
Missing lubricants Adding lubricants
The pressure is
instability ,the
standard gauge
depressurized
quickly
Pressurize without gauge under test. if
the instrument doesn’t leak pressure,
this indicates problem with gauge
under test .Otherwise there is problem
with device or standard module.check
the module and device separately
Replace standard gauge or
gauge under test
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.Put on the plugs and close relieve
G
H

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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]
valve.
7.2.If HS700 needs to take a long distance transport, please put on all plugs
to prevent dust getting into device.It is necessary to pack with specialized
cartons and foam wrap.
7.3.The item belongs to non-oil equipment,It is forbidden to calibrate oil gauge.
Operate the lead screw and hand pump regularly.

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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]/