South Herts Models
SHM Glowswitch Products
|
South Herts Models
SHM Glowswitch Products
|
|
|
The following information is provided more fully in the Glowswitch Handbook
IG-1 and IG-2
The IG senses the glow wire temperature by measuring its resistance every few milliseconds. If the glow wire has cooled from the set value, then the IG will re-connect the battery to restore the glow, but only when needed, so power consumption is very small and there is no over-advancement, pre-ignition or overheating of the plug. You might leave your engine ticking over for several minutes without the plug being heated, but when you snap open the throttle, the IG will briefly (if necessary) re-heat the glow.
The LED(s) tell you when the IG is testing the glow and when it is boosting it. They will also give you information about your glow and receiver batteries – a double flash repeating regularly means the glow battery is showing less than 1 V. A repeating quadruple flash means the Rx battery is showing less than 4.4V! NB The IG will work with 6V systems, but the Rx low voltage warning will not be useful as it will still trigger at 4.4V. The IG turns off when the Rx is switched off, so you can leave everything permanently connected, ready for starting (yes - use it for starting too) and the next flight. Single Version Part No IG-1b Twin Version Part No IG-2b
Recent IGs (suffix b) are fitted with a connection for the Hidden Helper start-up boost. The Hidden Helper boost switch consists of a magnetically operated reed switch with a 500mm lead that plugs straight into any suffix b Glowswitch. The switch-head can be fitted wherever is convenient inside fuselage or cowling so that a magnet [in a finger ring or glove for example] will operate the switch when the model is held for starting. NB: The switch is most sensitive at its extreme end. We also supply a suitable magnet if you don't have one already. NB: The Boost circuit operates at signal level (ie low current) so you can replace the magnetic reed switch with any conventional switch of your choice.
See the Handbook for instructions on making a suitable magnet ring. Helping Hand Boost Switch Part No HH-SB Helping Hand Magnet Part No HH-DM
Installation Installation is easy. Just connect the support battery and the glow plug to the IG and plug the IG into the Rx throttle channel with a standard Y-lead. Comprehensive instructions are provided in the SHM Handbook.
Twin and Multi-Cylinder Engines and 'Planes Because of the way in which IGs work, it is necessary to have one IG connection per glow plug. For twin cylinder engines use an IG-2. Otherwise use a combination of IG-1s and IG-2s. Batteries can be independent or shared if they are adequate to service all the glow plugs at once. A multi-cylinder application circuit is provided in the SHM Handbook.
Power Panels and external starting batteries External starts are not usually called for, but power panels may be connected for starting purposes.
Wiring,
switches
and
connectors
Battery charging On-board NMH, NiCd and Cyclon battery types may be charged in-situ using our CH-MC current controlled Mastercharger. These chargers plug directly into 220-240V UK mains sockets, and others with an adapter.
Other chargers If you wish to use your existing charger, our separate charger connector CH-OC can be used to provide connection to the CH-IG on-board Charging connector. When using other makes of charger be sure to read the notes in section 8 of the Glowswitch Handbook.
Miscellaneous The current draw of the IG-1 from the Rx battery is 5mA, rising to 10mA when the LED and glow output are both continuously on. The figure for the IG-2 is approximately double that of the IG-1. Current draw on the glow battery when not boosting the glow is equivalent to being on for 0.6 sec in every 60 (ie 1% of the time). The approximate weight of the IG-1 is 12gm, and that of the IG-2 is 20gm. 6V Rx system compatible.
Disclaimer The above information is provided in good faith for general guidance only. Details given are correct to the best of our knowledge at the time of printing, but subject to change without notice as a result of manufacturing variation and design improvement.
As with any change or addition to an r/c system, you should always carry out a range and performance check before operating the equipment.
|
|
|
Both
the
IG-1
and
the
IG-2
have
been
tested
in
typical
installations
(without
the
use
of
filters)
and
were
found
to
comply
with
EN
61000-6-1:
2001
and
EN
61000-6-3:
2001
and
therefore
comply
with
the
emission
and
immunity
requirements
of
the
EC
directive
2004/108/EC.