Changes
1.9m
,# The observing floor, using the panel on the North pier. If the switch does not work the first time, press the "Request Control" button at the top of the panel and try again.
# The catwalk, using the button on the orange control cabinet by the dome shutters.
== Telescope ==
=== Telescope power control ===
The original telescope isolator switch at the top of the stairs has been replaced by a three position switch (see figure below) that should be in the "PLC" position and left that way for normal operations, day and night. Observers should not use this switch unless authorised to do so by a technician. If the switch is not found in the "PLC" position, contact the electronics technician for guidance. Telescope power is now switched on/off at a new multifunctional control panel in the warm room, described in the following section.
<gallery>
Example.jpg|The new power switch at the top of the stairs. Ordinarily, it should be in the "PLC" position, day and night. Observers should not use this switch unless authorised by a technician.
</gallery>
=== The new warm room control panel ===
In April 2013, a new panel was installed in the warm room to control power to the telescope, slow motion drive and automatic dome rotation, and to indicate the status of a number of telescope subsystems (see figure below). Its functionality is described below.
<gallery>
Example.jpg|The new control panel installed in the warm room in April 2013. Power to the slow motion drive is controlled by turning the switch in the "SMD" section. When the drive power is on, the green light illuminates.
</gallery>
==== Telescope power ====
Large green "On" and "Off" buttons are located in the top left section of the panel, with corresponding indicators that illuminate to show the current status. To operate, push and hold in for $\sim 3$ seconds. These buttons replace the power switch previously located at the top of the stairs.
There is a safety interlock preventing telescope power from being switched off unless:
* Dome shutter is CLOSED (both "SHUTTER" indicators are off)
* Mirror shutter is CLOSED (both "MIRROR" indicators are off)
* RA and Dec are set to SLOW (both "FM" indicators are off)
The power OFF indicator will flash if an attempt is made to power down the telescope while the above subsystems are not in a safe state.
== Current known issues (last updated Nov 2013)==
