Gamma Vacuum Digitel MPC 635941 User manual

Digitel MPC Technician's Manual
Part Number: 500000, Revision: J
Gamma Vacuum, LLC
Copyright © 2003
Gamma Vacuum, LLC
12912 Ventura Court No. 28
Shakopee, MN 55379
USA

Digitel MPC Manual Page 2 of 72
I. Contents
I. Introduction......................................................................................................................................... 6
Description.............................................................................................................................................. 6
MPC Configurations........................................................................................................................... 6
RS-232/422/485 Serial Interface......................................................................................................... 6
Set Points ............................................................................................................................................ 6
High Voltage Modules........................................................................................................................ 7
Analog Outputs................................................................................................................................... 7
SAFE-CONN™ High-Voltage interlock............................................................................................ 7
AUTORUN™..................................................................................................................................... 7
Remote TSP/NEG Control Option...................................................................................................... 7
High-Voltage/TSP Filament Interlock Option.................................................................................... 8
Specifications.......................................................................................................................................... 9
II. Installation......................................................................................................................................... 10
Inspection for Damage.......................................................................................................................... 10
Installing the DIGITEL MPC ............................................................................................................... 10
Required items.................................................................................................................................. 10
Procedure .......................................................................................................................................... 11
Installing the Remote TSP/NEG Control Option.................................................................................. 11
Required Items.................................................................................................................................. 12
Procedure .......................................................................................................................................... 12
SAFE-CONN™ Installation on an Ion Pump....................................................................................... 13
Required Items.................................................................................................................................. 13
Procedure .......................................................................................................................................... 13
III. Operation....................................................................................................................................... 15
Front Panel Description ........................................................................................................................ 15
Rear Panel Description ......................................................................................................................... 17
Operating the Ion Pump........................................................................................................................ 18
To Evacuate the Pump...................................................................................................................... 18
To Start the Pump ............................................................................................................................. 18
Using the Controls ................................................................................................................................ 19
Display Selection.............................................................................................................................. 19
Disable and Enable ........................................................................................................................... 19
Keypad.............................................................................................................................................. 19
Program Mode Keys......................................................................................................................... 21
Menu Key.......................................................................................................................................... 29
Display Messages.................................................................................................................................. 41
Event Log.............................................................................................................................................. 41
General Description.......................................................................................................................... 41
Front Panel Display of Events .......................................................................................................... 42
Serial Port Output of Events............................................................................................................. 42
Analog Outputs..................................................................................................................................... 43
Voltage measuring............................................................................................................................ 43
Current measuring............................................................................................................................. 43
High Voltage/TSP Filament Interlock Option...................................................................................... 44
Serial Interface...................................................................................................................................... 44
Standard ............................................................................................................................................ 44
Specifics............................................................................................................................................ 45
IV. Service........................................................................................................................................... 52

Digitel MPC Manual Page 3 of 72
MPC Components................................................................................................................................. 54
Maintenance Procedures....................................................................................................................... 54
Removing the Top Cover.................................................................................................................. 55
Cleaning the Chassis......................................................................................................................... 55
Cleaning the Fan Filter...................................................................................................................... 55
Replacing Fuses................................................................................................................................ 55
Input and Output Voltage Selection...................................................................................................... 56
Input Voltage Selection Procedure ................................................................................................... 56
Output Voltage Selection Procedure................................................................................................. 57
Voltage Polarity Configuration......................................................................................................... 57
PROM Change Procedure..................................................................................................................... 58
Rear Panel Connector Pinouts .............................................................................................................. 60
Connector J104 — Set Point and Analog Output Signals ................................................................ 60
Connector J505 — Remote TSP/NEG Control Signals.................................................................... 61
Connector J112 — Serial Interface Signals...................................................................................... 61
Serial Communication Protocol Selection............................................................................................ 62
Remote TSP/NEG Control Option........................................................................................................ 64
Removing the Panels of the Remote TSP/NEG Control .................................................................. 64
Input Voltage Selection of the Remote TSP/NEG Control .............................................................. 65
Connecting a High Current Cable to the Remote TSP/NEG Control............................................... 65
Accessory Equipment ........................................................................................................................... 66
V. Appendix A....................................................................................................................................... 67
Menu Flowcharts .................................................................................................................................. 67

Digitel MPC Manual Page 4 of 72
II. Figures
Figure I-1. Photograph of the Digitel MPC............................................................................................... 6
Figure I-2. Remote TSP/NEG Control Option. ......................................................................................... 8
Figure II-1. MPC Rear Panel HV and SAFECONN Connectors. ........................................................... 11
Figure II-2. Remote TSP/NEG Control Connections.............................................................................. 12
Figure II-3. Diagram of Remote TSP/NEG Control................................................................................ 12
Figure II-4. High Current Cable............................................................................................................... 13
Figure II-5. SAFECONN Installation Diagram #1.................................................................................. 13
Figure II-6. SAFECONN Installation Diagram #2.................................................................................. 14
Figure III-1. Front Panel Controls and Indicators.................................................................................... 15
Figure III-2. Rear Panel Connectors........................................................................................................ 17
Figure III-3. DISPLAY SELECT key ..................................................................................................... 19
Figure III-4. Keypad. ............................................................................................................................... 20
Figure III-5. Menu key............................................................................................................................. 20
Figure III-6. Program Mode Select keys.................................................................................................. 21
Figure III-7. Setting pump size................................................................................................................. 31
Figure III-8. Reaching PREFRENCES Submenu.................................................................................... 31
Figure III-9. Reaching the Configuration Submenu................................................................................ 33
Figure III-10. Reaching the DIAGNOSTCS Submenu........................................................................... 38
Figure III-11. Line drawing of the optional interlock connector J506. ................................................... 44
Figure IV-1. Location of MPC Components. .......................................................................................... 54
Figure IV-2. Location of Fuses on the AC Power Board. ....................................................................... 55
Figure IV-3. Input and Output Voltage Conversion — Location of Components. ................................. 56
Figure IV-4. Voltage Polarity — Location of Components. ................................................................... 58
Figure IV-5. CPU Board — Location of PROM..................................................................................... 59
Figure IV-6. Rear Panel Connectors........................................................................................................ 60
Figure IV-7. Selecting the Serial Interface Protocol................................................................................ 62
Figure IV-8. Remote TSP/NEG Control — Location of Components.................................................... 64

Digitel MPC Manual Page 5 of 72
III. Tables
Table I-1. Specifications DIGITEL MPC.................................................................................................. 9
Table II-1. High Voltage and SAFE-CONN Connectors. ....................................................................... 11
Table III-1. Front Panel Controls and Indicators..................................................................................... 16
Table III-2. Program Mode Select Keys.................................................................................................. 21
Table III-3. Menu Hierarchical System................................................................................................... 30
Table III-4. Error Codes........................................................................................................................... 39
Table III-5. Display Messages................................................................................................................. 41
Table III-6. The Five Parts of the Event Record...................................................................................... 42
Table III-7. Serial Command Packet Description.................................................................................... 46
Table III-8. Serial Response Packet Description..................................................................................... 48
Table III-9. RS-232/422/485 Commands — PHI Standard Serial Interface........................................... 49
Table III-10. CRC Checksum Calculation............................................................................................... 51
Table IV-1. MPC Component Parts List.................................................................................................. 54
Table IV-2. Routine Maintenance Schedule............................................................................................ 55
Table IV-3. Part Numbers (p/n) — Fuses on the AC Power Board. ....................................................... 56
Table IV-4. Input Voltage Conversion Fuse Values for the DIGITEL MPC.......................................... 57
Table IV-5. Input Voltage Conversion Connectors for the DIGITEL MPC. .......................................... 57
Table IV-6. Connector J104 Pinouts........................................................................................................ 60
Table IV-7. Connector J505 Pinouts........................................................................................................ 61
Table IV-8. Connector J112 Pinouts........................................................................................................ 61
Table IV-9. Serial Interface DIP Switch Setting. .................................................................................... 63
Table IV-10. Optional Accessory Equipment.......................................................................................... 66
Table V-1. Drawings and Parts Lists....................................................................................................... 67
Table V-2. Schematics............................................................................................................................. 67

I. Introduction
The manual is divided into five sections. Section 1 contains a brief description and
specifications of the DIGITEL™ Multiple Pump Control (MPC). Sections 2 (page 10) and 3
(page 15) explain the installation and operation procedures, respectively. Section 4 (page 52)
provides information for servicing the unit.
Description
The DIGITEL™ MPC is a pump power supply and system control. It is designed to operate up
to two ion pumps and a titanium sublimation pump (TSP) or non-evaporable getter (NEG) pump,
all independently and simultaneously. The MPC can accommodate pump sizes from 10 l/s and
up to 1200 l/s. It operates on 115 or 230 VAC, 50 or 60 Hz.
The MPC (Figure I-1) is a programmable, microprocessor-based unit. It contains a metering
circuit, 8 process setpoints, communications interface RS-232/422/485, and up to two
independent high voltage modules. The front panel display provides direct readout of the ion
pump voltage, current, or pressure. Ranging is automatic within the selected display mode.
Figure I-1. Photograph of the Digitel MPC.
MPC Configurations
The DIGITEL MPC comes in the following configurations:
•635941 base unit plus one medium HV module (200W, 100mA)
•635942 base unit plus one large HV module (1000W, 500mA)
•635943 base unit plus two medium HV modules
•635944 base unit plus two large HV modules
•635945 base unit plus one medium and one large HV module
RS-232/422/485 Serial Interface
The DIGITEL MPC can be interfaced and remotely controlled by a computer. All commands
entered from the keypad can be performed from the computer.
Set Points
Eight programmable setpoints, four relay and four TTL (transistor-transistor logic), can be
configured to either supply. Hysteresis and control values can be programmed through the
computer interface or keypad. Nonvolatile memory is used to store setpoint data for up to 10
years without power applied to the unit. Bakeout control is designed into the software and
setpoints.
Digitel MPC Manual Page 6 of 72

Digitel MPC Manual Page 7 of 72
High Voltage Modules
The DIGITEL MPC is available with two high-voltage (HV) modules:
•The medium HV module has a starting capacity of 200W, 100 mA. It is intended
to fully operate pumps from 10 l/s to 200 l/s and can be used on larger pumps if they are well
roughed or if under high vacuum.
•The large HV module has a starting capacity of 1000W, 500 mA. It is intended
for pumps from 160 l/s to 1200 l/s.
HV modules are based on transformer design with low noise, high reliability, and overload
protection. Each HV module has a standard output of 7000 VDC. The output voltage can be
configured to ±7000 or ±5600 VDC for operating different pumps or systems. The modules
come with one standard SHV-10 HV connection. For economical operation of more than one
pump, an optional 2nd high-voltage output can be added.
Analog Outputs
Four buffered analog outputs are provided independently from each HV module to connect the
controller to data-acquisition devices. Two of these outputs provide a 0 to 10 volt signal with a
scale factor of 1 volt per 1000V output voltage (VMON). The other 2 outputs are programmable.
SAFE-CONN™ High-Voltage interlock
When operated with SAFE-CONN safety interlocked pumps and cables, the will DIGITEL MPC
automatically shut off high voltage when the high voltage cable is disconnected at either the
pump or controller end. This provides additional protection from possible shock hazard.
AUTORUN™
AUTORUN determines optimum starting and operating conditions based the pump size entered
and then starts and monitors the pump down without assistance. In start mode, because an ion
pump can draw high currents, the DIGITEL MPC goes through a protected-start process,
monitoring current, voltage, power, and time. If the pump starts properly, the MPC
automatically goes into run protection mode. If the pump does not start properly — the
DIGITEL MPC goes into a cool-down mode. If the pump does not start properly after three
tries, it displays PUMP ERROR. The specific error code that identifies the cause of an error can
be found in the Menu mode.
The DIGITEL MPC continuously protects the ion pump during start-up and normal operation.
Ion pump parameters are monitored continuously by the microprocessor. If there is a vacuum
failure, the MPC shuts down high voltage preventing serious damage. It can also detect power
failures and be configured to automatically restart high voltage after a power loss, if desired.
Remote TSP/NEG Control Option
The remote TSP/NEG option allows you to control a TSP (titanium sublimation pump) or NEG
(non-evaporable getter). All commands to operate the Remote TSP/NEG Control can be entered
using the DIGITEL MPC keypad or a host computer. It can operate in current or power control
mode and can be cycled based on time and pressure. In TSP operation the ranges are 0 to 999
seconds for on time and 0 to 999 minutes for off time.
The option consists of:
•Remote TSP/NEG Control unit
•harness inside the DIGITEL MPC

•control cable from the DIGITEL MPC to the Remote TSP/NEG Control
•high-current cable from the Remote TSP/NEG Control to the TSP/NEG
•an AC input power cable
Figure I-2. Remote TSP/NEG Control Option.
High-Voltage/TSP Filament Interlock Option
The remote interlock allows disabling of either the high voltage outputs or TSP filament firing.
The interlock is installed at J506 (on the back panel of the MPC) if the option is installed. A
loopback plug is shipped with the option along with a connector kit for custom configuration by
the user.
Digitel MPC Manual Page 8 of 72

Digitel MPC Manual Page 9 of 72
Specifications
Table I-1. Specifications DIGITEL MPC.
Parameter Specification
Operating temperature 0 to 40°C.
Operating humidity 0 to 80% RH (non-condensing).
Storage temperature -20 to 70°C.
Dimensions:
DIGITEL MPC
Remote TSP/NEG
WxHxD: 483 mm (19") x 133mm (5.25") x 476 mm (18.75").
WxHxD: 138 mm (5.4") x 292 mm (11.5") x 219 mm (8.6").
Input power 115 VAC, 230 VAC, or 208 VAC selectable.
Serial interface:
Baud Rate
number of start bits
number of stop bits
parity
number of data bits
9600
one.
one.
none.
eight.
Set points (8):
Type Set points 1 - 4 are relay; Set points 5 - 8 are TTL.
Electrical characteristics Relay: 500 mA, 28V each, maximum.
TTL: 15 mA each, maximum.
response time All MCP parameters are measured at least every 320 milliseconds.
Assuming a set point decision is handled right after measurement is
made, response time is 320 milliseconds. Assuming a set point decision
is made on the next time through the standard loop response time is 640
milliseconds. Relays take a few milliseconds to operate, so this increases
response time slightly.
Line frequency 48 to 62 Hz. No adjustment necessary.
High voltage output:
short circuit
+7000 VDC output standard; ±5600 and -7000 VDC selectable.
Medium HV module: 200W, 100 mA.
Large HV module: 1000W, 500 mA.
Polarity Positive or negative (selectable).
Analog outputs: 0 to 10V
Voltage
Current (outputs are jumper
selectable)
Operating Load
1V = 1000V.
1V = 100mA or 100µA on 500mA HV modules;
1V = 20mA or 20µA on 100mA HV modules
Lowest resistance = 2kΩ.
Pump size Selectable from the keypad (Menu key).
Filament power ramp-up 5 amps per second.

II. Installation
This section details the installation requirements for the DIGITEL™ Multiple Pump Control
(MPC).
WARNING: Gamma Vacuum, LLCs’ products are designed and manufactured to provide
protection against electrical and mechanical hazards for the operator and the area
surrounding the product. The procedures provided in Sections 2 and 5 of this manual and in
other Gamma Vacuum, LLC product manuals must be followed to ensure that these
protections are not impaired in any way.
WARNING: Installation procedures are for use by qualified and authorized personnel who
have experience working with voltages greater than 50 volts. To avoid personal injury, do not
perform any installation or service procedures unless qualified to do so.
Voltages up to 7000V are present. An interlock is provided to shut off power when the top
cover is removed. Do not defeat this interlock.
Do not disconnect the high-voltage cable with power on. After turning power off, allow at
least one minute before disconnecting electrical equipment
Do not operate the control without a proper electrical ground or near water. The control may
be damaged and its safety reduced, if it is operated outside of its specifications.
Inspection for Damage
NOTE: It is the customer’s responsibility to inspect and report any obvious shipping damage to
the carrier, typically within 30 days. Before installing Gamma Vacuum, LLC equipment, inspect
it for damage that may have occurred during shipment.
Installing the DIGITEL MPC
The DIGITEL MPC can be mounted in a standard 19 in. (48.3 cm) rack or used as a free-
standing unit. Make sure to provide clearance for air flow into top cover vent holes and out rear
mounted fan. Installation should be in such a manner as to make the rear power cord accessible.
NOTE:This unit can radiate radio frequency energy. Be sure that you install it according to
instructions or interference could result.
The unit protects against interference in a commercial environment. If operation in a residential
area causes interference, it is the user’s responsibility to correct this problem.
Required items
You need the following items to install the MPC:
Digitel MPC Manual Page 10 of 72