Pfeiffer Vacuum TPR-270 User manual

Translation of the original instructions
Operating Instructions
EN
PG 0014 BEN/B (1304)
TPR 270
Pirani Transmitter

Table of contents
2
Table of contents
1 About this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Validity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Proper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Improper use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Product description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Product identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3 Range of application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.5 Gas type dependency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Transport and storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.1 Vacuum connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.1 Before switching on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.2 Removal of components for their maintenance . . . . . . . . . . . . . . . . . . . . 11
7 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.1 Adjusting the transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8 Malfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.1 Rectifying malfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
10 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
11 Technical data and dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
11.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
11.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
11.3 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Pirani Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
11.5 Gas correction factor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Declaration of conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

About this manual
3
1 About this manual
1.1 Validity
●TPR 270
– Pfeiffer Vacuum product number PT R26 770, PT R26 780
This operating manual is for customers of Pfeiffer Vacuum. It describes the functioning
of the designated product and provides the most important information for safe use of
the unit. The description follows applicable EU guidelines. All information provided in this
operating manual refer to the current state of the product's development. The documen-
tation remains valid as long as the customer does not make any changes to the product.
Up-to-date operating instructions can also be downloaded from www.pfeiffer-vacu-
um.com.
1.2 Conventions
Safety instructions The safety instructions in Pfeiffer Vacuum operating instructions are the result of risk
evaluations and hazard analyses and are oriented on international certification stan-
dards as specified by UL, CSA, ANSI Z-535, SEMI S1, ISO 3864 and DIN 4844. In this
document, the following hazard levels and information are considered:
DANGER
Imminent danger
Indicates an imminent hazardous situation that will result in death or serious injury.
WARNING
Possibly imminent danger
Indicates an imminent hazardous situation that can result in death or serious injury.
CAUTION
Possibly imminent danger
Indicates an imminent hazardous situation that can result in minor or moderate injury.
NOTICE
Command or note
Command to perform an action or information about properties, the disregarding of
which may result in damage to the product.

4
Safety
Pictograph
definitions
Instructions in the
text
Work instruction: here you have to do something.
Abbreviations used TPR 270: Pirani transmitter
2Safety
2.1 Safety precautions
The transmitter TPR 270 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.
2.2 Proper use
●Only use the TPR 270 digital transmitter for measuring total pressures in the
1 • 10-4 ... 1000 hPa range.
●Only use the transmitter for air, inert gases and gas mixtures outside their explosion
limits.
Warning of a displayed source of danger in connection with operation of
the unit or equipment
Command to perform an action or task associated with a source of dan-
ger, the disregarding of which may result in serious accidents
Important information about the product or this document
Duty to inform
Each person involved in the installation or operation of the unit must read and observe
the safety-related parts of these operating instuctions.
The operator is obligated to make operating personnel aware of dangers originating
from the unit or the entire system.

Safety
5
2.3 Improper use
Improper use will cause all claims for liability and warranties to be forfeited. Improper use
is defined as usage for purposes deviating from those mentioned above, especially:
●operation in potentially explosive areas
●pumping of explosive media
●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

6
Product description
3 Product description
The transmitter TPR 270 is equipped with a temperature-compensated Pirani sensor
and enables total pressure measurements in the range of 1 • 10-4 ... 1000 hPa. Is the
transmitter being operated with a controller, a calibration factor can be applied for cor-
rection of the non-linear characteristics in the pressure range < 0.5 hPa for different gas-
es.
3.1 Product identification
To correctly identify the product when communicating with Pfeiffer Vacuum, always have
the information from the rating plate available.
Fig. 1: Product identification on the rating plate (example)
Scope of delivery The following positions are included in the delivery consignment:
– TPR 270
– Protective cover
– Operating instructions
3.2 Function
This sensor is based on the thermal conductivity of gases for vacuum pressure measure-
ments (Pirani principle). A thin tungsten wire is heated up cyclically to a certain temper-
ature. The time required for heating is a measure for the pressure.
The transmitter can be operated with an ActiveLine controller or with a customer related
control device.
Fig. 2: TPR 270
D-35641 Asslar Emmeliusstrasse33
Mod. 24V - 1W
Supply:
Ser.-Nr.: 4200061
TPR 270
Outp.: 0-10 V
15 - 30 V/DC
Mod.Nr. PT R26 770
Made in Germany 07/2012
HV Button for pressure calibration "low pressure"
ATM Button for pressure calibration "high pressure"
VACUUM
“HV“
“ATM“

Transport and storage
7
3.3 Range of application
The unit TPR 270 must be installed and operated in the following ambient conditions:
3.4 Accuracy
The transmitter is factory-calibrated for air. Adjustment may be necessary because of the
use in different climatic conditions, extreme temperatures, contamination or ageing.
Measurement accuracy is reduced in the pressure range above 20 hPa and below 1 •
10-3 hPa.
3.5 Gas type dependency
The measuring signal depends on the type of gas being measured. The relationship be-
tween measuring signal and pressure is accurate for N2, O2, dry air and CO . For other
gases consult the list of correction factors in the operating instructions (see p. 17, chap.
11.5). When the transmitter is operated with an ActiveLine controller, a calibration factor
can be set to achieve the corrrect reading (please refer to the operating instructions of
the appropriate controller).
4 Transport and storage
Units without external protection must not come into contact with electrostatically charge-
able 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.
Installation location weather protected (indoor)
Protection class IP 40
Installation altitude max. 2000 m
Ambient temperature +5°C to +40°C
Relative humidity 5 ... 85 %, non-condensing
Atmospheric pressure 860 hPa - 1060 hPa

8
Installation
5 Installation
5.1 Vacuum connection
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.
To facilitate adjustment after the transmitter has been installed, a free space of about
40 mm in axial direction should be assured in front of the "ATM" and "HV" push buttons.
Connecting the trans-
mitter
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 protec-
ted against damage.
Ensure that the connection flange is clean, dry and free of grease.
CAUTION
Excess pressure in the vacuum system 1500 to 4000 hPa
Damage to health through emission of process media, because elastomer washers
cannot withstand the pressure.
Use sealing rings with an outer centering ring.
CAUTION
Missing protective grounding!
The transmitter must be electrically connected to the grounded vacuum chamber.
For gauges with a KF flange, use a conductive metallic clamping ring.
Carry out the flange connection according to the requirements of DIN EN 61010.
CAUTION
Excess pressure in the vacuum system > 1000 hPa
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).

Installation
9
Fig. 3: Make the flange connection
Remove the protective cover, which is required during maintenance work.
Make the flange connection.
5.2 Electrical connection
Controllers The smallest presentable reading is 5 • 10-4 hPa at operation with Pfeiffer Vacuum con-
trollers.
Fig. 4: Connect TPR 270
Connect the transmitter to the control unit using the connection cable.
Secure the plug at the transmitter with the existing screw.
Other use The transmitter can also be operated with other control devices. In this case a sensor
cable (shielded) must be made by the user. For cable lengths up to 10 m (with 0.25 mm2
conductor cross section), the measuring signal can be read directly between analog out-
put (pin 2) and ground (pin 5). For longer sensor cable lengths, we recommend a differ-
ential measurement between analog output and analog ground (pin 3). As a result of the
voltage drop along the supply cable grounding lead, the common mode signal is approx.
0.5 V at the max. permissible cable length.
VACUUM
NOTICE
Damage to the transmitter!
Only connect the connection cable when de-energized.
Never establish a connection to the transmitter using a live cable.
VACUUM

10
Installation
Fig. 5: Assemble connection cable
Pin assignment
Solder in cable according pin assignment.
Assemble cable socket.
Connect the other end of the transmitter cable according to the pin assignment of the
appropriate control device.
Connect the transmitter to the control unit using the connection cable.
Switch on the control unit.
NOTICE
Damaging the transmitter
Incorrect connection, incorrect polarity or inadmissible supply voltages can damage the
transmitter.
Ground (pin 5) and shielding (pin 6) must always be grounded at the controller.
2
5
31
6
4
Pin Pin assignment
1 Identification (3.0 kΩto GND)
2 Analog output 0 ... 10V, (measuring range 1.5 ... 8.5V)
3 Analog ground
4 Supply (V DC), 15 ... 30V
5 Ground (GND)
6 Shielding