BUSCH VACTEST GCD 200 User manual
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Instruction Manual
VACTEST
Vacuum Measurement Equipment
AnalogTransmitter GCD 200
0870205300/-0001_en / Original instructions / Modifications reserved 16/09/2021
Table of Contents
2 / 12 Instruction Manual VACTEST GCD 200_EN_en
Table of Contents
1 Safety .......................................................................................................................................3
2 Product Description ..................................................................................................................4
2.1 Product Identification ....................................................................................................... 4
2.2 Delivery Content .............................................................................................................. 4
2.3 Proper Use ....................................................................................................................... 4
2.4 Improper Use ................................................................................................................... 4
3 Transport and Storage...............................................................................................................4
4 Installation................................................................................................................................5
4.1 Installation Conditions...................................................................................................... 5
4.2 Vacuum Connection......................................................................................................... 5
4.3 Electrical Connection ........................................................................................................ 7
4.3.1 I/O and Communication Port Schematic ............................................................... 7
5 Operation .................................................................................................................................8
5.1 Readjustment ................................................................................................................... 8
5.1.1 Readjustment by Pushbutton................................................................................. 8
6 Maintenance and Service..........................................................................................................9
7 Troubleshooting .......................................................................................................................9
8 Accessories...............................................................................................................................9
9 Technical Data..........................................................................................................................10
10 EU Declaration of Conformity...................................................................................................11
Safety | 1
Instruction Manual VACTEST GCD 200_EN_en 3 / 12
1 Safety
• Read and follow the instructions of this manual.
• Inform yourself regarding hazards, which can be caused by the product or arise in
your system.
• Comply with all safety instructions and regulations for accident prevention.
• Check regularly that all safety requirements are being complied with.
• Take account of the ambient conditions when installing your gauge. The protection
class is IP 54.
• Adhere to the applicable regulations and take the necessary precautions for the pro-
cess media used.
• Consider possible reactions between materials and process media.
• Consider possible reactions of the process media due to the heat generated by the
product.
• Before you start working, find out whether any of the vacuum components are con-
taminated.
• Adhere to the relevant regulations and take the necessary precautions when handling
contaminated parts.
• Communicate the safety instructions to other users.
This instruction manual highlights potential hazards where appropriate. Safety notes and
warning messages are tagged with one of the keywords DANGER, WARNING, CAU-
TION, NOTICE and NOTE as follows:
DANGER
... indicates an imminent dangerous situation that will result in death or serious injuries if
not prevented.
WARNING
... indicates a potentially dangerous situation that could result in death or serious injuries.
CAUTION
... indicates a potentially dangerous situation that could result in minor injuries.
NOTICE
... indicates a potentially dangerous situation that could result in damage to property.
NOTE
... indicates helpful tips and recommendations, as well as information for efficient and
trouble-free operation.
2 | Product Description
4 / 12 Instruction Manual VACTEST GCD 200_EN_en
2 Product Description
The analog transmitter GCD 200 is a capacitive vacuum gauge providing accurate and
gas type independent pressure measurements.
Equipped with a robust sensor made of aluminium oxide ceramic, this device combines
high reliability and resistance to contamination.
2.1 Product Identification
The product model can be found on the product's nameplate. Technical modifications
are reserved without prior notification.
2.2 Delivery Content
Included in the delivery consignment are:
– Analog transmitter GCD 200
– Protective cover
– Instruction manual
Available accessories, consult the chapter Accessories [►9].
2.3 Proper Use
The GCD 200 serves exclusively to measure total pressure in a range of:
– 200…0.1 mbar
The gauge is classified in electromagnetic interference class A and therefore can cause
radio interference in living quarters.
2.4 Improper Use
The use for purposes not mentioned above is regarded as improper, especially:
– Connection to pumps or units which are not suitable for this purpose according
to their operating instructions.
– Connection to units which have exposed voltage-carrying parts.
– Operation of the devices in areas with ionizing radiation.
No liability or warranty will be accepted for claims arising from improper use.
3 Transport and Storage
• Check the device for transport damage.
NOTICE
Devices without external protection.
Risk of damage to the device!
• The device must not come into contact with electrostatically chargeable materials and
must not be moved within electrical or high magnetic fields.
If a storage is planned:
• Seal the vacuum flange with the protective cover.
• Comply with the storage temperatures, see technical data.
• In rooms with moist or aggressive atmospheres, the device must be airproof shrink-
wrapped in a plastic bag together with a bag a desiccant.
Installation | 4
Instruction Manual VACTEST GCD 200_EN_en 5 / 12
4 Installation
CAUTION
Unauthorized modifications.
Risk to injury!
• Modifications or conversions of the gauge are not allowed.
4.1 Installation Conditions
• Make sure that the environment of the device is not potentially explosive.
• Make sure that the ambient conditions comply with the Technical Data [►10].
4.2 Vacuum Connection
CAUTION
Unintended opening of clamp with an overpressure in the vacuum system over 1000
mbar.
Risk to injury!
Damage to your health!
• Parts may fly around.
• Unsecured hose connections can release process media.
CAUTION
Overpressure in the vacuum system over 1500 mbar
Damage to your health!
The elastomer washers cannot withstand the pressure and can release process media.
• Use sealing rings with an outer centering ring.
NOTICE
Dirt and damage at the vacuum flange.
Impair the function of the gauge!
• Make sure that the flange is clean, dry and free of grease.
• When handling the instrument, make sure that the flange is protected against dirt and
damage.
4 | Installation
6 / 12 Instruction Manual VACTEST GCD 200_EN_en
• Remove the protective cover (is required again during maintenance work!).
• Connect the flange to the system.
Connection size:
– ISO KF 16
– G1/4 (female)
• Make sure that the sensor flange is connected to the ground.
Mounting position:
The installation position can be freely selected. The preferred position is a horizontal to
vertical position so that condensate and particles do not penetrate the measurement
chamber.
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Installation | 4
Instruction Manual VACTEST GCD 200_EN_en 7 / 12
4.3 Electrical Connection
NOTICE
Establish a connection using a live cable.
Risk of damage to the device!
• Only connect cables when de-energised.
4.3.1 I/O and Communication Port Schematic
Connector:
Type M12 A, 5-pin, male
1 2
4 3
5
Pin no. Description Pin no. Description
1 N/A (do not connect) 2 Output 4 … 20 mA
3 Power Supply: +9 to +30 VDC 4 N/A (do not connect)
5 Ground
NOTICE
Incorrect supply voltage.
Risk of damage to the device!
• Make sure to supply a correct and admissible voltage.
NOTE
Maximum admissible load resistor in Ω:
(supply voltage (V) – 9 V) / 0.02 A
5 | Operation
8 / 12 Instruction Manual VACTEST GCD 200_EN_en
5 Operation
5.1 Readjustment
The gauge is factory calibrated in upright position. Other orientations, different climatic
conditions, extreme temperature changes, ageing or contamination may necessitate re-
adjustment.
NOTE
Conduct adjustment at the same ambient temperature at which the device is typically
operated.
NOTE
For zero adjustment actual pressure should be less than 0.01 mbar.
NOTE
To achieve optimum results of the adjustment we recommend to consider a warm-up of
at least 10 minutes at the appropriate calibration pressure before any adjustment.
5.1.1 Readjustment by Pushbutton
Readjustment on atmosphere or zero pressure can be done by means of the “Adj” push-
button of the gauge. The gauge will notice automatically which adjustment point is rele-
vant.
The adjustment at zero pressure is an offset compensation of the measurement signal.
NOTE
For zero adjustment, real pressure must be less than 0.01 mbar. An adjustment at zero
pressure is possible only if the pressure reading is within 15 mbar of zero.
The output signal at zero pressure should equal 4.000 mA.
Adj
• Remove the rubber cap above the “Adj” pushbutton.
• Press the button “Adj” by means of a small screwdriver or similar tool to adjust the
gauge.
• Reinsert the rubber cap.
Maintenance and Service | 6
Instruction Manual VACTEST GCD 200_EN_en 9 / 12
6 Maintenance and Service
WARNING
Units contaminated with hazardous material.
Risk of poisoning!
Risk of infection!
If the unit is contaminated with hazardous material:
• Wear appropriate personal protective equipment.
The device requires no maintenance. External dirt and soiling can be removed by a damp
cloth.
Should a defect or damage occur on the device, please send the unit to us for repair and
fulfil the declaration of decontamination downloadable from www.buschvacuum.com.
NOTE
Malfunction of the unit, which is caused by contamination or wear and tear is not cov-
ered by warranty.
7 Troubleshooting
Problem Possible Cause Remedy
High measurement error. Contamination, ageing,
extreme temperature.
• Send unit for repair.
Output signal < 3.6 mA
Output signal > 22 mA
Defective unit or sensor. • Send unit for repair.
8 Accessories
Accessory Description Part no.
Mating plug 4 ... 20 mA 0680 204 573
9 | Technical Data
10 / 12 Instruction Manual VACTEST GCD 200_EN_en
9 Technical Data
VacTest GCD 200
Measurement principle Capacitive
Materials exposed to vacuum Stainless steel 1.4305, Al2O3 ceramic, FKM
Measuring range mbar 200 … 0.1
torr 150 … 0.075
Overpressure limit bar abs. 6
Measurement uncertainty % full scale < 0.25 %
Leakage rate mbar l/s < 5 x 10-10
Reaction time ms < 120
Electrical Connection M12 A, 5-pin
Supply voltage V 9 … 30
Max. power consumption W 0.6
Output signal 4 … 20 mA
Output function 0.08 x pmbar + 4 = out (mA)
Error < 3.6 mA; > 22 mA
Operating Temperature °C +5 ... +60
Storage Temperature °C -40 ... +70
Relative Humidity: 5 … 80%, not condensing
Protection Class IP 54
Weight g 170
68
ISO KF 16
55
Ø 39.8
EU Declaration of Conformity | 10
Instruction Manual VACTEST GCD 200_EN_en 11 / 12
10 EU Declaration of Conformity
This Declaration of Conformity and the CE-mark affixed to the nameplate are valid for the gauge within the Busch
scope of delivery. This Declaration of Conformity is issued under the sole responsibility of the manufacturer.
The manufacturer Busch Produktions GmbH
Schauinslandstr. 1
DE-79689 Maulburg
declare that the gauge VacTest GCD 200
has been manufactured in accordance with the European Directives:
– ‘Electromagnetic Compatibility (EMS) ’ 2014/30/EU
– ‘RoHS’ 2011/65/EU, restriction of the use of certain hazardous substances in electrical and electronic equip-
ment
and following the standards.
Standard Title of the Standard
EN 61326-1:2013
Group 1 / Class B
Electrical equipment for measurement, control and laboratory use. EMC re-
quirements. General requirements
EN 50581:2012 Technical documentation for the assessment of electrical and electronic prod-
ucts with respect to the restriction of hazardous substances
Person authorised to compile the technical file: Gerd Rohweder
Busch Dienste GmbH
Schauinslandstr. 1
DE-79689 Maulburg
Maulburg, 24.08.2017
Martin Gutmann, General director
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0870205300/-0001_en
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