GA 09.220/3.02
THERMOVAC
Transmitter
TTR90
TTR90-S
Catalog numbers
128 10, 128 20
128 11, 128 21
128 12, 128 22
128 13, 128 23
128 14, 128 24
Operating Manual
Incl. Declaration of Conformity
Product Identification
In all communications with Leybold Vakuum, please specify
the information given on the product nameplate. For conven-
ient reference transfer this information into the diagram be-
low.
Typ:
No:
F-No:
V W
Leybold Vakuum GmbH,
D-50968 Köln
Validity
This document applies to products with the following catalog
numbers:
TTR90 without switching function
128 10
(DN 16 ISO-KF 80 °C)
128 11 (" NPT 80 °C)
128 12 (DN 16 CF-R 250 °C)
128 13 (" tube 80 °C)
128 14 (8 VCR 80 °C)
TTR90-S with switching function
128 20
(DN 16 ISO-KF 80 °C)
128 21 (" NPT 80 °C)
128 22 (DN 16 CF-R 250 °C)
128 23 (" tube 80 °C)
128 24 (8 VCR 80 °C)
The catalog number (No) can be taken from the product
name plate.
If not indicated otherwise in the legends, the illustrations in
this document correspond to the DN 16 ISO-KF vacuum con-
nection. They apply other vacuum connections by analogy.
We reserve the right to make technical changes without prior
notice.
All dimensions are indicated in mm.
Intended Use
The THERMOVAC Transmitters TTR90 and TTR90-S have
been designed for vacuum measurement of gases in the
pressure range of 5×10
-4
… 1000 mbar.
They can be operated in connection with a Leybold Vakuum
controller for THERMOVAC transmitters or with another
evaluation unit.
Functional Principle
Over the whole measurement range, the measuring signal is
output as a logarithm of the pressure.
Trademarks
VCR® Swagelok Marketing Co.
Safety
Symbols Used
DANGER
Information on preventing any kind of physical injury.
WARNING
Information on preventing extensive equipment and envi-
ronmental damage.
Caution
Information on correct handling or use. Disregard can lead
to malfunctions or minor equipment damage.
Personnel Qualifications
Skilled personnel
All work described in this document may only be carried out
by persons who have suitable technical training and the
necessary experience or who have been instructed by the
end-user of the product.
General Safety Instructions
• Adhere to the applicable regulations and take the ne-
cessary precautions for the process media used.
Consider possible reactions with the product materials.
Consider possible reactions of the process media due to
the heat generated by the product.
• Adhere to the applicable regulations and take the ne-
cessary precautions for all work you are going to do and
consider the safety instructions in this document.
• Before beginning to work, find out whether any vacuum
components are contaminated. Adhere to the relevant
regulations and take the necessary precautions when
handling contaminated parts.
Communicate the safety instructions to all other users.
Liability and Warranty
Leybold Vakuum assumes no liability and the warranty
becomes null and void if the end-user or third parties
• disregard the information in this document
• use the product in a non-conforming manner
• make any kind of changes (modifications, alterations etc.)
to the product
• use the product with accessories not listed in the product
documentation.
The end-user assumes the responsibility in conjunction with
the process media used.
Technical Data
Measurement principle thermal conductance
according to Pirani
Measurement range
(air, O
2
, CO, N
2
) 5×10
-4
… 1000 mbar
Accuracy
≈10% of reading in the range
of 1×10
-3
… 100 mbar
(outside of this range up to
factor 2)
Repeatability
≈2% of the measured value in
the range 1×10
-3
… 100 mbar
Output signal
(measuring signal)
Voltage range
0 … ≈+10.3 V
Measurement range
+1.9 V … +10.0 V
Voltage vs. pressure logarithmic, 1.286 V/decade
Error signal <0.5 V (filament rupture)
Output impedance
2×10 Ω
Minimum loaded impedance
10 kΩ, short circuit-proof
Response time
≈10 ms
Transmitter identification
resistance 27 kΩ referenced
to supply common
Adjustment
Potentiometer <HV>
Potentiometer <ATM>
adjustment under 10
-4
mbar
adjustment at atmospheric
pressure
Switching function TTR90-S
Setting range
with potentiometer
≈2×10
-3
… 500 mbar
(≈2 rotations per pressure
decade)
Hysteresis
≈30% of reading
Relay contact
closed
open
60 V, 0.5 ADC, floating
at low pressure (LED lit)
at high pressure, error, no
supply
Supply
DANGER
The transmitter may only be connected to supply
and evaluation units that conform to the
requirements of a grounded protective extra-low
voltage (SELV-E according to EN 61010). The
connection to the transmitter has to be fused
1)
.
Supply voltage at transmitter
+14 … +32 VDC
(ripple ≤1 V
pp
)
Power consumption
≤1 W
Fuse required
1)
≤1 AT (slow)
Electrical connection FCC-68 socket, 8 poles,
with screening
Sensor cable 8 poles, plus shielding
Cable length
≤100 m (8×0.14 mm
2
)
Grounding concept
Vacuum connection
to signal common
Supply common
to signal common
→ "Electrical Connection"
connected via 10 kΩ
(voltage difference ≤±50 V)
conducted separately, for
differential measurement
Materials exposed to vacuum
Vacuum connection
Filament
Feedthrough
Baffle (only version
DN 16 ISO-KF)
Other materials
stainless steel
W
glass
stainless steel
Ni, Cu, NiFe
Internal volume
128 10, 128 20
128 11, 128 21
128 12, 128 22
128 13, 128 23
128 14, 128 24
≈2 cm
3
≈2 cm
3
≈10 cm
3
≈2 cm
3
≈2 cm
3
Admissible pressure
≤10 bar (absolute)
limited to inert gases
1)
Leybold Vakuum controllers fulfill these requirements.
To Next Page
Need help?
General