Inficon TPG300, CP300C9, IF300P Operating Manual

Operating

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Plug
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CP300
IF300P

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oller

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ards

TPG

for T

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otal Pressure Gauge

IG9972BEN (2

017-09)

1

About this Document

Validity

This document describes the plug-in boards for the total pressure gauge control­ler TPG300, intended as a supplement to the documentation of the basic unit
TPG300 (→  [1]).

This document applies to plug-in boards listed below

Type Description Part number

CP300C9 Pirani / cold cathode measurement board IO441000

IF300P Interface and relay Board (Profibus) IO441395

The part number (No) can be taken from the product nameplate.

2 IG9972BEN (2017-09) Plug-In Boards.om

Contents

About this Document 2
Validity 2

1 Safety 4

1.1 General Safety Information 4

1.2 Symbols Used 4

1.3 General Stipulations 4

2 Description 5

2.1 Pirani / Cold Cathode Measurement Board CP300C9 5

2.2 Interface and Relay Board IF300P 5

2.3 Pirani Measurement 5

2.4 Cold Cathode Measurement 5

3 Technical Data 6

3.1 Pirani / Cold Cathode Measurement Board CP300C9 6

3.2 Interface and Relay Board IF300P 7

4 Installation 8

4.1 Installing / Removing the Plug-In Boards 8

4.2 Connecting the Pirani Gauge 8

4.3 Connecting the Cold Cathode Gauge 9

4.4 Connecting the <OUTPUT> Analog Signal 10

4.5 Connecting the Relays of the IF300P 10

4.6 Connecting the Profibus-DP Interface to the IF300P 11

5 Adjustment 12

5.1 Adjusting the Pirani Measurement Circuit 12

6 Troubleshooting 13

6.1 Operating and Adjustment Problems 13

6.2 Defects 13

6.3 Problems with the RS232C Interface 13

6.4 Problems with the Profibus-DP Interface 14

7 Accessories 15

7.1 Gauges 15

7.2 Measurement Cables and Cable Connectors 15

Appendix 17

A: Output Signals of the Measurement Boards 17
B: Gas Type Dependence 19
C: Literature 21

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1 Safety

1.1 General Safety
Information

1.2 Symbols Used

a) Take the necessary precautions when doing installation work.

It may be necessary implement additional protective measures in the system.

b) Before connecting any external elements, check that they are compatible with

the technical data in this document.

c) Take the necessary precautions when doing maintenance or repair work.

Danger:

Information on preventing any kind of personal injury or extensive
equipment damage.

Caution:

Special information on damage prevention.

Note:

Special information on cost-effective use.

1.3 General Stipulations

Skilled Personnel:

This work may only be carried out by persons with suitable technical
training and the necessary experience.

Waiting time, reaction time, duration of test

<

… > Marking

→  See page …

→  See document …

Since the individual components are delicate, appropriate measures must be taken
to protect them from static electricity. Store modules in antistatic bags or contain­ers.

Damage resulting from incorrect handling may lead to a revocation of the
guarantee.

INFICON accepts no responsibility nor warranty if the user or third parties

• utilize the product not according to the defined use

• make any kind of changes (modifications, alterations, etc.) to the product.

4 IG9972BEN (2017-09) Plug-In Boards.om

2 Description

2.1 Pirani / Cold Cathode
Measurement Board
CP300C9

Pirani measurement circuit

Cold cathode measurement
circuit

2.2 Interface and Relay
Board IF300P

2.3 Pirani Measurement

2.4 Cold Cathode
Measurement

The CP300C9 board is a combined board containing one Pirani and one cold
cathode measurement circuit.

The Pirani measurement circuit has one gauge cable connector, two trimmer po­tentiometers and one analog signal output. When the control unit is on, the Pirani
measurement circuit is in continuous operation. The analog signal is constantly
available, independent of what is shown on the pressure display.

The cold cathode measurement circuit for the measurement of high and ultra high
vacuum has one gauge cable connector and one analog signal output. When the
gauge is turned on, the analog signals are constantly available, independent of
what is shown on the pressure display.

This measurement board contains special electronics to limit the measurement
current to 100 µA, a feature that considerably extends the lifetime of the gauge.

The IF300P board contains a RS232C interface and a Profibus-DP interface. The
board has five relays with one floating changeover contact each.

Within certain limits the thermal conductivity of gases is a function of the pressure.
Pirani thermal conductivity vacuum gauges exploit this phenomenon for pressure
measurements.

The measurement element consists of a thin filament with a high temperature co­efficient. The resistance of the wire and consequently its temperature are main­tained at a constant value by means of a suitable control circuit. The electrical
power supplied to the filament is, therefore, a measure of the thermal conductivity
and consequently the gas pressure.

The current flowing in a self-sustained gas discharge with a cold cathode (inverted
magnetron) depends on the applied voltage, the gas composition, and the pres­sure. A magnetic field that penetrates the measurement chamber has the effect
that the electrons move along a spiral trajectory from the cathode to the anode and
thereby cause even at low gas densities a sufficient number of ionizing impacts for
maintaining the discharge. If (with a known gas type) the anode voltage and mag­netic field are kept constant, the discharge current is a measure of the pressure.

IG9972BEN (2017-09) Plug-In Boards.om 5

3 Technical Data

3.1 Pirani / Cold Cathode
Measurement Board
CP300C9

Number of measurement circuits 1 each

Gauges TPR018, IKR085 (both ITER)

Display range (signal output) 1)

Pirani
Cold cathode

mbar
mbar

5×10-4 … 1000

-9

… 1×10-2

5×10

Measurement range 1)

Pirani
Cold cathode

mbar
mbar

1×10-2 … 100

-8

… 5×10-3

1×10

Cable length

Pirani, max.
Cold cathode, max.

m
m

100
60

2)

… 100

Power supply cold cathode gauges

Operating voltage
Measurement current

kV
µA

3.3
≤600

Signal output

Measured value, analog
Error message
Current, max.
Output resistance

Reaction time (10  90%) for sudden

V
V
mA
Ω

0 … +10
>11.5
2
400

pressure step

Pirani

-3

<10

 103 mbar

Cold cathode

-9

⇔ 10-6 mbar

10

ms

ms

<50

<100

Connection, equipment side

Pirani gauge
Cold cathode gauge
Signal output

Weight kg

female
female
female

Amphenol C91E, 6-pin
SHV coaxial
ø2 mm

≈0.21

1)

N2-equivalent

2)

when using the lower measurement range limit (→  9)

6 IG9972BEN (2017-09) Plug-In Boards.om

3.2 Interface and Relay
Board IF300P

Relay

Number 5

Contact type 1 change over contact each

floating
max. 50 V (ac) relative to other
contacts and ground

Characteristic data (ac)

Switching voltage, max.
Switching current, max.
Switching power, max.

30 V (dc), 50 V (ac)

1.5 A
45 W, 75 VA

Characteristic data (dc)

Switching current, max. switching voltages >50 V (dc) are

inadmissible for safety reasons

0.6 A at 50 V (dc)

0.8 A at 40 V (dc)

1.5 A at 30 V (dc)

Connection, equipment side

Type D-sub connector, 15-pin, male

Transition resistance with socket

125 mΩ

Interface

Type Profibus-DP

Baud rates <12Mbaud

Data format

Profibus-DP interface →  [2]

Connection, equipment side D-sub connector, 9 pin, male

Cable length, max.

Weight

→  [2]

≈0.16 kg

Before connecting any external elements, check that they conform to the

above technical data and the controller is switched off for at least
15 seconds.

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