PFEIFFER RPT 100 (01) PDF Document

Each person involved in the installation or operation of the PFEIFFER RPT 100 must read and observe the safety-related parts of the operating instructions. The operator is obligated to make operating personnel aware of dangers originating from the unit or the entire system.

The transmitter RPT 100 has been tested and accepted in compliance with EN 61010/ VDE 0411 “Safety Equipment for Electrical Components”.

• Observe the safety and accident prevention regulations.

• Check regularly that all safety precautions are being complied with.

• The unit has been accredited with protection class IP 40. Take necessary measures when installing into ambient conditions, which afford other protection classes.

• Consider possible reactions between the materials and the process media.

• Consider possible reactions of the process media due to the heat generated by the product.

• Do not modify or alter the unit yourself.

• Note the shipping instructions, when returning the unit.

• Inform yourself about a possible contamination before starting work.

• Adhere to the relevant regulations and take the necessary precautions, when handling contaminated parts.

• Communicate the safety instructions to other users.

Only use the PFEIFFER RPT 100 digital transmitter for measuring total pressures in the 1 · 10⁻⁴ … 1200 mbar range.

Improper use will cause all claims for liability and warranties to be forfeited. Improper use is deemed to be all use for purposes deviating from those mentioned for proper use, 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.

• The operation of the devices in potentially radioactive areas.

The following items are included in the delivery consignment:

• RPT 100

• Protective cover

• Operating instructions

The PFEIFFER RPT 100 must be installed and operated in the following ambient conditions:

Units without external protection must not come into contact with electrostatically chargeable materials and must not be moved within electrical or magnetic fields.

→ In rooms with moist or aggressive atmospheres, the unit must be airproof shrink-wrapped in a plastic bag together with a bag of desiccant.

→ Keep the original protective covers.

CAUTION: Vacuum component!

Dirt and damage impair the function of the vacuum component.

→ When handling vacuum components, ensure that they are kept clean and are protected against damage.

→ Ensure that the connection flange is clean, dry and free of grease.

CAUTION: Excess pressure in the vacuum system 1.5 to 4 bar

Damage to health through emission of process media, because elastomer washers cannot withstand the pressure.

→ Use sealing rings with an outer centering ring.

Mounting orientation

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.

Connecting the transmitter

CAUTION: Excess pressure in the vacuum system > 1 bar

Danger of injuries by inadvertent opening of elements under stress due to parts flying around.

→ Only use stressed elements, which can be opened and closed with appropriate tools (e.g. strap retainer-tension ring).

→ Remove the protective cover, which is required during maintenance work.

→ Make the flange connection.

NOTE: Damage to the transmitter!

Only connect the connection cable when de-energized.

→ Never establish a connection to the transmitter using a live cable.

Communication is effected, depending on the position of the address selector switch at the transmitter, via Serial Interface RS-232 or via the RS-485 (address settable from 1-15).

→ Set the address selector switch on the transmitter to RS-232 mode (basic factory-setting).

→ Connect the transmitter to the control unit using the connection cable.

→ Switch on the control unit.

Up to nine transmitters in series can be connected to the DPG 109 controller.

→ Set address selector switch S on the transmitter to RS-485 mode with the relevant address.

→ Connect the transmitter to the control unit using the connection cable.

→ Switch on the control unit.

Pin Assignment

→ Set the address selector switch on the transmitter to RS-232 mode (basic factory-setting).

→ Connect the transmitter to the power supply unit and to the RS-232 interface on the PC using the connection cable.

→ Plug in the power supply unit.

→ Operate transmitter with software DokuStar (included with DPS 101).

→ Set address selector switch S on the transmitter to RS-485 mode with the relevant address.

→ Connect the transmitter to the power supply unit and to the RS-232 interface on the PC using the connection cable.

→ Switch on the supply voltage with switch S1 on the power supply.

→ Operate the transmitter using the DokuStar Plus software (optional).

→ Set the address selector switch on the transmitter to RS-232 mode (basic factory-setting).

→ Plug the TIC 252 into the D-Sub socket on the transmitter and secure using fixing screws.

→ Connect the power supply to the TIC 252.

→ Set address selector switch S on the transmitter to RS-485 mode with the relevant address.

→ Connect the transmitter to the TIC 002 using the connection cable.

→ Connect the power supply to the TIC 002.

→ Set address selector switch S on the transmitter to RS-485 mode with the relevant address.

→ Connect the transmitter to the USB/RS-485 converter using the connection cable.

→ Connect the transmitter to the power supply.

WARNING: Contamination of transmitter parts possible due to the media measured! Poisoning hazard through contact with harmful substances.

→ In the case of contamination, carry out appropriate safety precautions in order to prevent danger to health through dangerous substances.

→ Decontaminate affected parts before carrying out maintenance work.

→ Switch off the power supply on the control unit/power supply or disconnect the equipment from the mains supply.

→ Loosen any connection cables.

→ Detach the transmitter from the vacuum apparatus.

→ Close the flange opening by using the original protective cover.

After switching on the power supply, the transmitter is ready for operation. However, it is advisable to wait for a stabilization period of 5-10 minutes before measurement, and to operate the transmitter without interruption during the measurement process.

The pressure measured in the Pirani range depends on the gas type. To adjust for different gases, a corresponding gas type correction factor can be set on the transmitter; this generates correct measurements in the pressure range below 1 mbar. The gas type correction factor is factory-set for air and N₂ to 1.00.

The PFEIFFER RPT 100 transmitter provides the option of changing the transition range between gas type-independent (Piezo) and gas type-dependent (Pirani) pressure measurement according to the application.

By default there is a continuous transition with value compensation in the pressure range from 5 … 15 mbar (trans_LO). Alternatively, a direct switchover at 1 mbar between Piezo and Pirani sensors can be selected (switch). In the upper range (1 mbar to 1200 mbar), this permits measurements completely regardless of the gas type.

Communication with DPG 101 or DPG 109 control unit:

→ Select switching ranges of the sensor components according to the operating manual for the relevant control unit.

Communication via RS-232 or RS-485:

→ Select switching range:

– trans_LO: Send [P:049] with value <<001>>

– switch: Send [P:049] with value <<000>>

Communication is carried out, depending on the address selector switch setting, via the serial RS-232 interface using the relevant display units or via RS-485 using the Pfeiffer Vacuum protocol with the following parameters:

• 9600 baud

• 8 data bits

• 1 stop bit

• no parity

Parameter Overview

The pressure value can be queried using parameter [P:740].

The value is transmitted as a string in the format “aaaabb”, where “aaaa” is the mantissa and “bb” is the exponent with an offset of 20 of an exponential number. “aaaa” is therefore in the range “1000” (for 1.000) to “9999” (for 9.999). The individual characters of the string are the numbers “0” (ASCII 48) to “9” (ASCII 57).

Example: “104223” represents 1.042 x 10⁺³ mbar, “750015” represents 7.500 x 10⁻⁵ mbar.

Parameter [P:303] transfers the actual error code of the transmitter. The following error codes can occur:

Parameter [P:349] contains a logogram for the component name in accordance with the following table:

“…”: means 4 blanks

The transmitter is factory-calibrated. It may be necessary to calibrate the Pirani sensor in the event of contamination, other installation positions, extreme temperature fluctuations, ageing, etc. Before equalization, the transmitter should be operated at the relevant pressure for approx. 5 … 10 minutes (warm-up time). For correct zero point equalization, the pressure in the vacuum chamber must be below 1·10⁻⁵ mbar.

With controller DPG 101/DPG 109:

→ Equalize the transmitter as described in the instructions for the control units.

Via RS-232/RS-485:

→ Evacuate the vacuum chamber to the pressure p < 1·10⁻⁵ mbar.

→ Set the pressure adjusting point [P:741] to «000» for low pressure and transmit.

→ Send actual pressure value ([P:740] with value «000000») for low pressure (corresponds to p < 1·10⁻⁴); ==> "ur" (under range).

→ Vent vacuum chamber to atmospheric pressure with air or N₂; afterwards wait about 10 minutes.

→ Set the pressure adjusting point [P:741] to «001» for high pressure and transmit.

→ Set the actual pressure value [P:740] to the atmospheric pressure («100023» for 1000 mbar). If the atmospheric pressure is actually different, e.g. 980 mbar, send [P:740] with value «980022».

The unit requires no maintenance. A damp cloth can be used to wipe away any dirt. The unit is not prepared for customer repair.

For service, follow these steps for sending in the unit:

→ Download the forms “Service Request” and “Declaration on Contamination”.

→ Fill out the “Service Request” form and send it by fax or e-mail to your Pfeiffer Vacuum service address.

→ Include the confirmation on the service request from Pfeiffer Vacuum with your shipment.

→ Fill out the declaration on contamination and include it in the shipment (required!).

→ Seal the contaminated unit in suitable protective film.

→ If possible, send unit in the original packaging.

The following are the correction factors for the Pirani sensor relative to N₂ (Nitrogen). These values represent the relative sensitivity in the molecular range (1 · 10⁻¹ mbar).