
3.3.1.With timer control
Operation, | using | a | timer, |
| is | as | follows: |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||||
1 . |
| Check | that | generator | kV | and | mA | settings |
| are |
| correct. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||||||
2. |
| Determine | the | exposure time, and set the | timer | for |
| the required window shutter. The clear | plastic | cover | is | ||||||||||||||||||||||||||||||||
|
| rotated until the black pointer is set to the |
| required | time | (0 | to 6), | while the centre knob is | rotated | in | a |
| |||||||||||||||||||||||||||||||
|
| clockwise direction until the required multiplication factor (x1, x10 : seconds, minutes or hours) is against | |||||||||||||||||||||||||||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
| the | arrow. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
| When timing | commences the red pointer will gradually return to zero, then the timer microswitches return | ||||||||||||||||||||||||||||||||||||||||
|
| to the normal position (off), the timer and | the |
| red | pointer | returns | to | the | position | set | by | the | black |
|
|
| ||||||||||||||||||||||||||
|
| pointer. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
3. |
| Set the three | - | position | SHUTTERS | switch | to | select | the | required | window | shutter, | e.g. | when | window | 3 | is | to | |||||||||||||||||||||||||
|
| be | used the | switch | is | set | to | 3; | and |
| the | time | must | be | set | by the | timer. |
|
|
|
|
|
| ||||||||||||||||||||
4. |
| Open the shutter by operating the lowest SHUTTERS |
|
| |||||||||||||||||||||||||||||||||||||||
|
| SHUTTERS | I |
| is | open | the | passes | to | the | sample |
| in | the camera, |
| ||||||||||||||||||||||||||||
| the | red | lamp | on | the | tube | shield | (below | the | filter/shutter disc) | is | lit, the | red | flags |
| will | appear | in the | holes |
| |||||||||||||||||||||||
|
| on | either | side | of | the | tube | shield, |
| and the | timer | operation |
| will |
| commence. |
|
|
|
|
|
|
|
|
|
|
|
| |||||||||||||||
5. When the preset | time |
| has | elapsed | the | shutter is | closed, | and |
| the | whole | instrument | is | switched | off | unless | a |
| |||||||||||||||||||||||||
|
| shutter | is | open | at another tube | shield | position. |
| will be | generated | as | long | as one or |
| more | shutters |
| ||||||||||||||||||||||||||
|
| are | open. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
NOTE: | The | red | warning |
| lamps | are | fail | safe, | and | the | shutters | will | close | if | a | bulb | filament | is | broken | when | a |
| |||||||||||||||||||||
|
|
| shutter | is | open. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3.3.2.Without timers
When a timer is not used, or is | not fitted, proceed as follows: |
|
|
|
|
|
|
|
| ||||||||
1 | . | Check that the generator kV | and mA settings are correct. |
|
|
|
|
|
|
|
| ||||||
2 | . | Ensure that the 3 - position | switches | are | in | the |
|
|
|
|
|
|
| ||||
3 | . | Open the shutter by operating the lowest SHUTTERS | |||||||||||||||
|
| SHUTTERS I | shutter | will | open and | the | beam | passes | to | the sample | in | the | camera, | ||||
|
| the red lamp on the tube shield is | lit, | and | the | red | flags will | appear in | the holes on either side | of the | tube shield. | ||||||
4 | . | When the exposure time has elapsed, operate the SHUTTER 0 | close, |
| |||||||||||||
|
| and the generator will switch | off | unless a | shutter | is | open | at | another | tube | shield | position. | will be | ||||
|
| generated as long as one or | more | shutters | are | open. |
|
|
|
|
|
|
|
|
|
3.4.SWITCHING OFF A MOTOR WHEN THE SHUTTER CLOSES
Cameras | can | be | fitted with | motors, either | for | moving | film, or a | crystal, | or | for | spinning | the | sample. |
| If | required. | ||||||||||||||||||||
the motor operation can be switched off when the timer reaches its zero position, and it will remain off |
| |||||||||||||||||||||||||||||||||||
until | the | timer is reset (if one or more | shutters | are still open). The two outside a.c. mains sockets on the rear | ||||||||||||||||||||||||||||||||
panel | are | used | for | this | purpose, | and | it | is |
| necessary for a jumper wire to be removed between terminals | 25 and | |||||||||||||||||||||||||
26 on the rear of | the timer, refer to the | Service Part. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||||||||
The mains connector for the motor used in | the | tube | shield | position | 1 |
| or | 2, |
| must | be | plugged | into | the | mains | |||||||||||||||||||||
socket immediately behind, i.e. adjacent to | the | motor | used | for | positions | 3 | or |
| 4 | will | be | |||||||||||||||||||||||||
connected | to | the |
| rear |
| panel (viewed from the rear). |
|
|
|
|
|
|
|
|
|
|
|
| ||||||||||||||||||
The | procedure | for | analysis | is | as | described |
| in |
| paragraph | 3.3.1., | but | now | the |
| camera | motor | will | start | at the | moment | |||||||||||||||
that the Starting relay operates, when GENERATOR I is depressed. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||||||||||||||||||||
When | the | shutter is opened the timer | will | start, |
| and at the end of | the | preset | time | when | the | shutter | closes, |
| ||||||||||||||||||||||
the motor | will also stop. If another | shutter | is |
| still open | the | equipment | will | not | switch |
| off, | the | timer | is | not | reset | |||||||||||||||||||
and there is no power to the motor. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||||||||
To reset the timer and start the camera motor, | place the |
| in | its | central | position. | If | all |
| |||||||||||||||||||||||||||
shutters are closed | after | the | preset | time, | the | equipment | switches | off | and | the |
| timer resets. |
|
|
|
|
|
|
|