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
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