#390
Attachments to CAT Chat Minutes
March 15, 2004
W. Wesolowski
Programming of the 7955 times used in Oxford Cryo-Pump Controllers
Note: Programming to be done with No Power to Rack. For Timer 1 the desired configuration is:
No Power to Rack With Rack Active Rack Active

Goes to this configuration when Rack Active
A. To start programming mode
Press "prog" button and hold for 3-5 seconds. At the end of that time display will show.

B. To set timer relay configuration
Press "Prog" button as many times as necessary to display.
Press "Reset" button when you have the desired relay configuration.
C. To set time scale (hrs., mins., secs.)
Press "Prog" button as many times as necessary to display.
Prog
0
SEC
Press reset button when you have the desired time scale
D. To set delay time (least significant digit)
The desired setting is 180, least signficant digit can be set by pressing "Prog" button until desired # is set, when set, press "Reset" button and display will move to next signficant digit

Depending on unit, least significant digit will flash or will be flashing
E. To set delay time (next significant digit)
Press "Prog" button until the desired # is set, when set press "Reset" button and the display will move to the next significant digit

Digit flashing
or
symbol flashing
F. To set delay time (most significant digit)
Press "Prog" button until the desired # is set
Press "Reset" button

Digit flashing
or
symbols flashing
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G. Set trigger type [Level (LEU) or Edge (Edg)]
Press "Prog" button to display LEU
Press "Reset" button when desired trigger type is indicated

If the selection is correct - Press "Reset" button |
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(Time Relay Conf.) If incorrect press "Prog" button until you have the correct selection, then press "Reset" |
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If selection is correct - Press "Reset" button |
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(Time Scale) If incorrect press "Prog" button until you have the correct selection then press "Reset" [time setting (lsd)] |
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If selection is correct - Press "Reset" button |
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(Time setting lsd) Flashing or Flashing If incorrect press "Prog" button until you have the correct selection, then press "reset" |
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If selection is correct - Press "Reset" button |
PROG 180 SEC OFF DLY
or
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(Time setting nsd) If incorrect press "Prog" button until you have the correct selection - then press "reset" |
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If selection is correct -Press "Reset" button |
PROG 180 SEC OFF DLY |
or Flashing |
(Time Setting MSD) If incorrect press "Prog" button until you have the correct selection, then press "Reset" |
If selection is correct - Press "Reset" button |
PROG LEU |
(Trigger type) If incorrect press "Prog" button until you have the correct selection then press "Reset" |
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If selection is correct - Press "reset" button |
180 SEC OFF DLY O O |
Operational state No Rack Active |
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Timer 2 - The same sequence is now done for Timer 2. The desired configuration is [Note - Trigger type is Edg], and desired configuration is the same Rack Active or not.

To start programming mode:
Press "Prog" button and hold for 3-5 seconds, at the end of that time display will show


B. To set timer relay configuration:
Press "Prog" button as many times as necessary to display


Press "Reset" button when you have the desired relay configuration.
C. To set time scale (hrs., mins., secs):
Press "prog" button as many times necessary to display


Press reset button when you have the desired time scale.
D. To set delay time (least significant digit)
The desired setting is 003, least significant digit can be set by pressing "Prog" button until desired # is set, when set press "Reset" button and display will move to next significant digit


Depending on unit, least significant digit will flash or will be flashing
E. To set delay time (next significant digit)
Press "Prog" button until the desired # is set, when set press "Reset" button and the display will move to the next significant digit

Digit flashing
or
symbol flashing
![]()
F. To set delay time (most significant digit)
Press "Prog" button until the desired # is set
Press "Reset" button

Digit flashing
or
Symbols flashing
G. Set trigger type [Level (LEU) or Edge (Edg)]
Press "Prog" button to display Edg
Press "Reset" button when desired trigger type is indicated

H. The timer now reviews your selected setting (if changes were made)
If the selection is correct -Press "Reset" button |
PROG ss |
(Timer relay Conf.) If incorrect press "Prog" button until you have the correct selection then press "Reset"(time scale) |
If selection is correct - Press "Reset" button |
PROG 0 SEC |
If incorrect press "Prog" button until you have the correct selection then press "Reset" [time setting (lsd)] |
If selection is correct - Press "reset" button |
PROG 003 SEC ss
![]() PROG 003 SEC ss |
Flashing Or Flashing In incorrect press "Prog" button until you have the correct selection, then press "Reset" Flashing or Flashing |
If selection is correct - Press "Reset" button |
If incorrect press "Prog" button until you have correct selection - then press "Reset" |
If the selection is correct -Press "Reset" button |
PROG 003 SEC ss |
Flashing or Flashing (Time Setting MSD) If incorrect, press "Prog" button until you have the correct selection, then press "Reset" |
If selection is correct - Press "Reset" button |
PROG Edg |
(Trigger type) If incorrect press "Prog" button until you have correct selection, then press "Reset" |
3 SEC ss O O |
Operational state (Rack active or not) |
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