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 (V
MON
). 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
