18 MAC TW1 user manual
up. Preheating does not seriously reduce lamp lifetime unless engaged for very long periods, but it requires
higher cooling fan speeds.
The economy mode (
→) setting limits lamp power to maximum to between 70% and 100% of
full power when the electronic dimmer operates at full intensity. If full power is never required, limiting lamp
power is an effective way of increasing lamp lifetime. Too many factors determine lamp lifetime for a precise
figure to be given, but a very approximate rule is that a 5% reduction in lamp power will double lamp lifetime.
The MAC TW1 monitors lamp operation when an internal dimmer is used. If a lamp fails,
appears in
the fixture’s display and the fixture enters lamp explosion mode, in which pan and tilt are locked and the
fixture does not respond to DMX control. If is displayed, cut power to the fixture and do not operate it
until you have checked the lamp for burnt-out filaments or damage and replaced if necessary. Pan and tilt
are released and DMX control is re-enabled when power is reapplied.
CUSTOM SETTINGS
The custom configuration function → - allows you to save and recall three sets of
fixture settings. The savable settings are DMX mode, pan/tilt speed, pan/tilt inverse and swap, display, DMX
reset, shortcuts, dimming curve, lamp pre-heat and economy modes, noise reduction modes and effects
speed.
All settings can be returned to factory defaults using the
→→command.
Readouts
TIME
→ provides readouts of fixture hours () and lamp hours (). For each of these
readouts, there is a resettable () and a non-resettable () counter for total accumulated hours
since fabrication. To return the resettable counter to zero, display it and then press [Up] until the counter
reads
.
Because the lifetime of the tungsten halogen lamp is greatly extended when the lamp is at less than 100%
intensity, the number of hours displayed in the lamp hours counter can only be used as an approximate
guide when considering lamp replacement (see also the section on economy mode above).
TEMPERATURE
→ provides temperature readouts for the head and base.
FIRMWARE VERSION
→ displays the version number of the installed firmware. The firmware version is also displayed
briefly at startup.
FANS
→ displays the current speed of base, head and lamp cooling fans in RPM (revolutions per
minute).
DMX
The DMX log () menu provides useful information for troubleshooting control problems.
displays the DMX refresh rate in packets per second. Values lower than 10 or higher than 44 may
result in erratic performance, especially when using tracking mode.
displays the quality of the received DMX data as a percentage of packets received. Values much
below 100 indicate interference, poor connections, or other problems with the serial data link that are the
most common cause of control problems.
displays the DMX start code. Packets with a start code other than 0 may cause irregular
performance.
The remaining options under
display the DMX values received on each channel. If the fixture does
not behave as expected, reading the DMX values can help you troubleshoot the problem.
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