Table of Contents:
Relevant Devices
Description | Qty | Source | Part Number | Notes |
|---|---|---|---|---|
Vacuum Gauge Controller | 1 | Leybold | GRAPHIX Two | Controls the gauges on the chamber |
RS-232 to Ethernet Adapter | 1 | Lantronix | UDS 2100 | This is the version with two serial ports |
High Vac gauge | 1 | Leybold | PTR 90 N | Combo Pirani and Cold Cathode gauge |
Low Vac gauge | 1 | Leybold | TTR 91 N S | Pirani gauge |
Functional Block Diagram
(This device at lower right)
Software Actions
Action | Notes | |
|---|---|---|
| 1 | Read Channel 1 Pressure Value | Value reported as telemetry (see below) |
| 2 | Read Channel 2 Pressure Value | Value reported as telemetry (see below) |
| 3 | Channel 1 Gauge Status | Value reported as telemetry (see below) |
| 4 | Channel 2 Gauge Status | Value reported as telemetry (see below) |
| 5 | Set Point 1 Status | Value reported as telemetry (see below) |
Required Adjustable Settings
Setting | When Needed | Notes | ||
|---|---|---|---|---|
Build | Observing | Maintenance | ||
Telemetry Read Cadence | Yes | No | Maybe | |
Device Set-up Parameters
Required Telemetry
Parameter | Report Frequency | Purpose | Notes | |
|---|---|---|---|---|
| 1 | Channel 1 Pressure Value | Once per minute [TBD] | ||
| 2 | Channel 2 Pressure Value | Once per minute [TBD] | ||
| 3 | Channel 1 Gauge Status | Once per minute [TBD] | ||
| 4 | Channel 2 Gauge Status | Once per minute [TBD] | ||
| 5 | Set Point 1 Status | Once per minute [TBD] | Check on gate valve position |
Relevant Datasheets & Manuals
Description | File | Source | |
|---|---|---|---|
| 1 | Leybold Graphix Two Manual | https://www.leyboldproducts.com/media/pdf/0f/9e/dc/300550402_002_C1_GRAPHIX_123_EN.pdf | |
| 2 | ‘Vacuum Measurement’ brochure containing specs on various gauges, including both of our gauges (PTR 90 N and TTR 91 N S) | ||
| 3 | PTR 90 N Vacuum Gauge ‘Technical Data’ sheet | ||
| 4 | CAD Model for PTR 90 N gauge. | ||
| 5 | Datasheet for TTR 91 N S gauge. Seems a bit outdated, and was downloaded from a vac supply company (not Leybold). However there was nothing on this part number at Leybold (closest was a TTR RNS model, which might be the newer version of our gauge). | http://vacshop.ir/wp-content/uploads/2016/02/vacshop-THERMOVAC_New-TTR91N.pdf |
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