LEYBOLD THERMOVAC TTR 91 R, Руководство по эксплуатации

Страница: 9 / 24

9 300710168_002_C1 - 01/2018 - © Leybold
Installation (mechanical)
The TTR 91 R can be mounted in any orientation however the gauge tubes are individually factory calibrated whilst
vertical. For correct pressure indication in your chosen gauge orientation, the gauge should be recalibrated at
atmospheric pressure. Leybold recommends mounting the gauge tube vertical in order to minimise the build up of
process particulates and condensable vapours within the gauge.
For optimum accuracy it is recommended that both the atmosphere and vacuum adjustment is carried out before
use. Refer to the Maintenance section.
To connect the TTR91R to your vacuum system use an 'O' ring / centring-ring to connect a TTR91R with a DN16
ISO-KF flange to a similar flange on the vacuum system.
To connect to a Leybold controller use a shielded cable which is terminated in suitable RJ45 connectors. These
cables are available from Leybold (Cable Type A).
The TTR91R is compatible with the GRAPHIX and DISPLAY controllers from Leybold. The controllers will
automatically recognize the gauge and display the measured pressure.
Installation (Electrical)
Do not make any connection to the gauge identification pin (pin 4) as this may cause the gauge to malfunction.
A schematic diagram of the recommended electrical connections to the TTR 91 R is shown below. The pins on the
electrical connector are used as shown in the below table. Refer to the Technical Data section for more detailed
specifications.
Pins on the TTR 91 R electrical connector
Pin number Use
1 Electrical supply positive
2 Electrical supply ground (0 V)
3 Pressure measurement output signal
4 Gauge identification
5 Signal ground
6 Set-point output signal
7 Remote calibration input
8 Not connected
Do not use the TTR 91 R for safety critical applications.
The TTR 91 R is not intended to be fail-
safe
!
Caution
!
Attention
!