LEYBOLD THERMOVAC TTR 211 S User manual

Vacuum Pumps Instrumentation Fittings and Valves LEYBOLD VACUUM
TTR 211 S;TTR 211 S2
TTR 211 NPT
TTR 216 S
THERMOVAC Transmitter
Cat. No.
157 30; 164 30
157 32;
157 31
GA 09.216 / 2.02
Operating Instructions

Leybold Service
If equipment is returned to LEYBOLD, indicate whether the equipment
is free of substances damaging to health or whether it is contaminated.
If it is contaminated also indicate the nature of the hazard. LEYBOLD
must return any equipment without a Declaration of Contamination to
the sender’s address.
General Remarks
We reserve the right to alter the design or any data given in these Ope-
rating Instructions.The illustrations are not binding.
Contents Page
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1.1 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2.2 Measurement system . . . . . . . . . . . . . . . . . . . 5
1.2.3 Signal output . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2.4 Switching threshold . . . . . . . . . . . . . . . . . . . . . 5
1.2.5 Control input . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.6 Status display . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.7 Monitor output . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.8 Mechanical data . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.9 Ambient conditions . . . . . . . . . . . . . . . . . . . . . 6
1.3 Technical description . . . . . . . . . . . . . . . . . . . . 6
1.4 Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4.1 Supplied equipment . . . . . . . . . . . . . . . . . . . . 7
1.4.2 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Page
2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Installation of the TTR 211 S; TTR 211 S2;
TTR 211 NPT;TTR 216 S . . . . . . . . . . . . . . . . 8
2.2 Electrical connection . . . . . . . . . . . . . . . . . . . 10
2.2.1 Power supply . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.2 Measurement signal output . . . . . . . . . . . . . . 12
2.2.3 Switching threshold . . . . . . . . . . . . . . . . . . . . 12
2.2.4 Monitor output . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.5 Switching over the chart recorder output . . . . 14
2.2.6 Identification . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.3 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.1 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.2 Measurement system status indication . . . . . 15
2.4 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 15
3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 16
3.1 LEYBOLD service . . . . . . . . . . . . . . . . . . . . . 16
3.2 The operating electronics . . . . . . . . . . . . . . . 16
3.3 The sensing cell . . . . . . . . . . . . . . . . . . . . . . 16
3.3.1 Cleaning the sensing cell . . . . . . . . . . . . . . . 16
3.3.2 Exchanging the sensing cell . . . . . . . . . . . . . 17
3.3.3 Alignment of the sensing cell . . . . . . . . . . . . . 18
4 Spare parts list . . . . . . . . . . . . . . . . . . . . . . 18
Annex 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Annex 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
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1 Description
1.1 General
The THERMOVAC transmitter TTR 211 S, TTR 211 S2,
TTR 211 NPT and TTR 216 S is supplied ready for ope-
ration. Even so, we recommend to read these Operating
Instructions with care so as to ensure optimum operating
conditions right from the start.
These Operating Instructions contain important informa-
tion on the functions, installation, start-up, operation and
troubleshooting of the THERMOVAC transmitters
TTR 211 S, TTR 211 S2, TTR 211 NPT and TTR 216 S.
Important remarks concerning operational safety and
protection are emphazised as follows:
Warning Indicates procedures that must be strict-
ly observed to prevent hazards to per-
sons.
Caution Indicates procedures that must strictly
be observed to prevent damage to, or
destruction of the TTR 211 S, TTR 211
S2, TTR 211 NPT and TTR 216 S.
Note
Indicates special technical requirements that the user
must comply with.
The references to diagrams, e.g. (4/1), consist of the Fig.
No. and the item No. in that order.
Unpack the TTR 211 S, TTR 211 S2, TTR 211 NPT and
TTR 216 S immediately after delivery, even if it is to be
installed at a later date.
Examine the packaging for any external damage.
Completely remove all packaging materials.
Note
Retain the shipping container and the packaging materi-
als in the event of complaints about damage.
Check that the TTR 211 S, TTR 211 S2, TTR 211 NPT
and TTR 216 S is complete (see Section 1.4).
Carefully examine the TTR 211 S,TTR 211 S2, TTR 211
NPT and TTR 216 S visually.
If any damage is discovered, report it immediately to the
forwarding agent and insurer. If the damaged part has to
be replaced, please get in touch with the orders depart-
ment.
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1.1.1 Purpose
The THERMOVAC transmittersTTR 211 S,TTR 211 S2,
TTR 211 NPT and TTR 216 S are compact active pres-
sure converters housing a Pirani measurement system
as well as the corresponding operating electronics.
They are particularly well suited for integration into sy-
stems and offer a measurement range of 5·10-4 to 1000
mbar.
The transmitter is connected directly to the vacuum
system through its DN 16 KF or 1/8“ NPT flange.
The electrical connection is provided through a screened
8-way FCC 68 connector.
Moreover, the technical data as published in Section 1.2
must be observed.
1.2 Technical Data
1.2.1 General Data
Measurement range 5·10-4 to 1·103mbar
Measurement uncertainty
Deviation from the characteristic
 ± 20 % in the range from 1·10 -3 to 1·10-2 mbar
± 15 % in the range from 1·10-2 to 30 mbar
± 50 % in the range from 30 to 1000 mbar
Average temperature coefficient
of the output span < 1 % / K of the displayed value
Reproducibility < 5 % of the displayed value
Measurement principle
thermal conductivity according to Pirani
Supply voltage 14.5 to 36 V DC; typ. 24 V DC
Ripple ≤2 Vpp
in the range from 17 to 32 V
Power consumption < 2 W
Protection IP 40
Electrical connection 8-way FCC 68 socket
with screen
Cable length 100 m max. (dia. 0.14 mm2)
Flammability UL 94 - V2
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CE
- Electrical safety DIN EN 61 010, Part 1,
corresponding to VDE 0411 Part 1, bzw. IEC 1010-1
- Emission of interferences EN 50081, Part 1, Limit B
- Immunity to interferences EN 50082, Part 2, Level III
1.2.2 Measurement System
Measurement system exchangeable
Filament tungsten (TTR 211 S, TTR 211 S2,
TTR 211 NPT)
or platinum (TTR 216 S)
Flange connection DN 16 KF or 1/8“ NPT
Degassing temperature 80 °C max. at the flange
Dead volume 11 cm3approx.
Materials in contact with the medium
TTR 211 S / 211 S2 aluminium, nickel-plated steel,
VACON, tungsten, CrNi 8020;
glass, epoxy cement
TTR 211 NPT stainless steel, tungsten, glass
VACON, CrNi 8020, epoxy cement
TTR 216 S stainless steel, CrNi, Al2O3ceramics,
NiFe, Mo, Ni, platinum
Overpressure tolerance
TTR 211 S / 211 S2;TTR 211 NPT 3 bar abs.
TTR 216 S 10 bar abs.
1.2.3 Signal Output
Signal output 0 to 10.6 V
Permissible load resistance Ra≥10 kOhm
Measurement signal 1.9 V to 10 V;
corresponding to 5·10-4 to 1·103mbar
logarithmic, 1.286 V per decade
Status signal broken filament 10.5 V
1.2.4 Switching Threshold
Switching threshold 1 normally open relay contact
Switching threshold 2 (TTR 211 S2)
changeover relay contact
Adjustment range about 1·10-3 to 500 mbar
Hysteresis about + 30 % of the adjusted pressure value
Contact rating 1 60 V; 0.5 A DC
Contact rating 2 60 V; 0.5 A DC
250 V; 3 A AC
Error status open contact or rest position
for broken filament
or switched off supply voltage
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1.2.5 Control Input
Input resistance RE≈100 kOhm approx.
(see Fig. 3 and Section 2.2.5)
Chart recorder output switchover
Measurement signal output UE≈11 to 12 V
or open input
Switching threshold adjustment UE≈0 to 1 V
1.2.6 Status Display
Operation (power)
Switching threshold (not activated) two-colour LED
shining orange
Switching threshold (activated) two-colour LED
shining green
1.2.7 Monitor Output
3.5 mm jack socket for accessing the measurement sig-
nal and switching threshold setting (see Section 2.2.4).
1.2.8 Mechanical Data
Dimensions (WxHxD) in mm
for TTR 211 S / 211 S2; TTR 216 S 73 x 106 x 56
for TTR 211 NPT 73 x 121 x 56
Weight 200 g approx.
1.2.9 Ambient Conditions
Storage temperature range - 20 °C to + 70 °C
Climatic rating KWF to DIN 40040
Operating temperature 10 °C to 50 °C
Max. rel. humidity on 30 days per year,
non-condensing 95 %
1.3 Technical Description
The THERMOVAC utilizes the thermal conductivity of
gases for the purpose of vacuum pressure measurement
(Pirani principle). The temperature of the filament which
is used is maintained at a constant level by an electronic
control circuit. Thus the sensor may respond quickly to
any pressure changes. The specially designed tempera-
ture compensation circuitry significantly improves tem-
perature stability of the measured pressures in the use-
ful measurement range from 5·10-4 mbar to atmospheric
pressure.An internal voltage regulator permits operation
off a wide supply voltage range with low requirements
(2 Vpp ripple).
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The built-in trigger level is easily adjustable over a range
from 1·10-3 to 500 mbar.The switching function is availa-
ble through a relay contact. A LED is provided for indica-
tion of the switching function.
TheTTR 211 S2 is equipped with an additional switching
threshold which is accessible through an additional set of
relay contacts.
The TTR 211 S, TTR 211 S2, TTR 211 NPT and TTR
216 S supplies a logarithmic output of the vacuum pres-
sure by means of a voltage signal ranging from 1.9 to 10
V which can easily be subjected to further processing. A
control signal may also be applied to read out the current
threshold setting via the signal output.
The threshold setting may also be checked through an
additional monitor output where a voltmeter may be con-
nected, for example. The measurement signal is also
continuously available at this output for testing purposes.
The low impedance output amplifier permits the connec-
tion of long cable runs.
Faults in the sensor, such as a broken filament, for exam-
ple can be detected at the signal output by way of a sta-
tus message. In the event of a fault, the switching thres-
hold relay is returned to its rest position.
1.4 Equipment
1.4.1 Supplied Equipment
Cat. No.
THERMOVAC transmitter TTR 211 S 157 30
THERMOVAC transmitter TTR 211 S2 164 30
THERMOVAC transmitter TTR 211 NPT 157 32
THERMOVAC transmitter TTR 216 S 157 31
Operating Instructions GA 09.216
Jack plug (3.5 mm)
1.4.2 Accessories
Cat. No.
Replacement sensing cell for TTR 211 S 157 75
Replacement sensing cell for TTR 211 S2 157 75
Replacement sensing cell for TTR 211 NPT 896 34
Replacement sensing cell for TTR 216 S 157 77
10 m long connection cable with
two FCC 68 plugs, screened 157 33
FCC 68 plug / screw terminal adapter
fitted on top hat rail for
cabinet installation in preparation
DN 10/16 KF clamping ring 183 41
DN 16 KF (Al) centering ring 183 26
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For overpressure operation and degassing
(TTR 216 S only):
Ultra sealing disc (3 pcs.) 883 75
Clamping ring for ultra sealing discs 882 75
2 Operation
Check the technical data first to see whether the trans-
mitter is suited for your particular application.
2.1 Installation of the TTR 211 S;
TTR 211 S2;TTR 211 NPT;
TTR 216 S
The THERMOVAC transmitters TTR 211 S, TTR 211 S2,
TTR 211 NPT and TTR 216 S should preferably be
mounted flange down.Inclined installation is possible but
the horizontal orientation must not be exceeded.
Flange up installation is not permissible because under
such circumstances condensate may collect in the
TTR 211 S, TTR 211 S2, TTR 211 NPT and TTR 216 S.
This will either adversely affect the measurements, or the
transmitter may possibly be damaged.
The THERMOVAC transmitter is equipped with a DN 16
KF or a 1/8“ NPT connection flange which is used to
connect the transmitter to the mating connection flange
on a vacuum system with the aid of a centering ring and
a clamping ring.
For the dimensional drawing, see Fig. 1.
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9
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73
121
16
13
1/8" NPT
92
106
7
56
DN 16 KF
Trigger
0
Fig. 1 Dimensional drawing for TTR 211 S and TTR 211 NPT

2.2 Electrical Connection
The electrical connection for the THERMOVAC transmit-
ters is provided through an 8-way FCC 68 connector
which links the transmitter to the corresponding opera-
ting unit.
The pinout is given in Fig. 2.
Pin Signal Designation
on the rear
Pin 1 Supply voltage
14.5 V to 36 V DC + 24 V DC
Pin 2 0 V supply; used as the ground
reference for the supply and
control signal voltages. COMMON
Pin 3 Pressure dependant
logarithmic signal output SIGN 0 - 10 V
Pin 4 „TM transmitter“ identification
code (27 kOhm) IDENT
Pin 5 Signal ground (used only for
the pressure signal) SIGN COM
Pin 6 Switch contact 1 TRG
Pin 7 Chart recorder switchover
(control input) SIGN CTRL
Pin 8 Switch contact 2 TRG
Note
Signal ground (pin 5) and power supply ground (pin 2)
are internally linked by a 10 Ohm resistor. For this also
refer to the block diagram of Fig. 3.
Two examples of how to connect the TTR 211 S,
TTR 211 S2, TTR 211 NPT and TTR 216 S are given in
Annex 2.
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Pin 1
Fig. 2 Connection socket