The cooling control units is located in the ER, rack E3-03. It is the top crate which contains a blank, a power supply unit for 5V and ±5-15V, another blank and three control units. The following table describes the connections made to these latter three modules.
| Unit | Connector | Function |
|---|---|---|
| controller-A | connector 1 | all power supplies (statrons) DAC output control lines (except for heater element) |
| connector 2 | DAC output control line for heater | |
| connector 3 | alarms control register | |
| connector 4 | analog control signals for electronics inside magnet area | |
| controller-B | wide flatcable | currently not in use |
| narrow flatcable | RS232 interface to main computer read-out system | |
| LEMO (top) | signals from alcohol level meter and motor sensor | |
| LEMO (bottom) | interlock system connector | |
| controller-C | wide flatcable | feedthrough for statron control signals from left panel |
| Lemo-1 | stratron control line 1 (plugged directly into stratron) | |
| Lemo-2 | stratron control line 2 | |
| Lemo-3 | stratron control line 3 | |
| Lemo-4 | stratron control line 4 | |
| Lemo-5 | stratron control line 5 | |
| Lemo-6 | stratron control line 6 |
This paragraph contains some example data on the cooling powersupplies. The values are taken with the system at a stabilization temperature of 5 °C.
| Nr | On/Off | Remote/Local | V | I(no beam) | I(25mA) |
|---|---|---|---|---|---|
| 1 | On | Remote | 4.5 | 0.65 | 0.71 |
| 2 | On | Remote | 4.5 | 0.68 | 0.73 |
| 3 | On | Remote | 4.5 | 0.67 | 0.72 |
| 4 | On | Remote | 4.5 | 0.66 | 0.71 |
| 5 | On | Remote | 4.5 | 0.65 | 0.69 |
| 6 | On | Remote | 4.5 | 0.65 | 0.69 |
| 7 | On | Local | 15.1 | 1.98 | 2.13 |
| 8 | Off | Remote |
The interlock is a normally closed switch. The powersupply cannot be operated when this switch opens. The switch opens when
The interlock-cable is a light grey 2-pole LEMO cable connected to controller-B LEMO (bottom). The cable is labelled (about 1 m from the LEMO connector) with tape saying 'LW-cooling Interlock white=+'.
| Sensornr | Function |
|---|---|
| 0 | temp sensor on module WxL3 (-35°C < temp < 35°C --> Safe ) |
| 1 | temp sensor on module WxL2 (-35°C < temp < 35°C --> Safe ) |
| 2 | temp sensor on module WxL1 (-35°C < temp < 35°C --> Safe ) |
| 3 | temp sensor on module WxU6 (-35°C < temp < 35°C --> Safe ) |
| 4 | temp sensor on module WxU5 (-35°C < temp < 35°C --> Safe ) |
| 5 | temp sensor on module WxU4 (-35°C < temp < 35°C --> Safe ) |
| 6 | temp sensor on module WxL6 (-35°C < temp < 35°C --> Safe ) |
| 7 | temp sensor on module WxL5 (-35°C < temp < 35°C --> Safe ) |
| 8 | temp sensor on module WxL4 (-35°C < temp < 35°C --> Safe ) |
| 9 | temp sensor on module WxU3 (-35°C < temp < 35°C --> Safe ) |
| 10 | temp sensor on module WxU2 (-35°C < temp < 35°C --> Safe ) |
| 11 | temp sensor on module WxU1 (-35°C < temp < 35°C --> Safe ) |
| 12 | not used |
| 13 | not used |
| 14 | not used |
| 15 | not used |
| 16 | water temp sensor 1 ( 28°C < temp --> ALARM ) |
| 17 | water temp sensor 2 ( 28°C < temp --> ALARM ) |
| 18 | water temp sensor 3 ( 28°C < temp --> ALARM ) |
| 19 | water temp sensor 4 ( 28°C < temp --> ALARM ) |
| 20 | not used |
| 21 | not used |
| 22 | not used |
| 23 | not used |
| 24 | not used |
| 25 | not used |
| 26 | not used |
| 27 | not used |
| 28 | not used |
| 29 | not used |
| 30 | not used |
| 31 | Watchdog counter |
| 32 | reference temp platinum sensor, located on copper block holding the Peltier elements near the exit of alcohol. ( -35°C < temp < 25°C --> Safe ) |
| 33 | alcohol level-meter ( 30 < value --> ALARM ) nominal value 18 |
| 34 | stabilization temp ( -35°C < temp < 25°C --> Safe ). This value can be set. |
| 35 | Peltier current. DAC1 value ( 5 < value < 4000 ) 4000 corresponds to max current of 5A (should not occur) |
| 36 | heater current. DAC1 value ( 5 < value < 4000 ) 4000 corresponds to max current of 5A (should not occur) |
| 37 | hot reset counter |
