RRC2L Online Quick Start Guide

Overview
The RRC2L unit is ready to fly dual deployment duties as it comes, right out of the box, providing a drogue event at apogee and a main event at 500 ft AGL. Changing this default setting is covered in the Pushbutton Programming ​section. 

At apogee (highest point of the rocket flight) the RRC2L will fire a "drogue" charge to separate the rocket airframe and deploy a small drogue chute to stabilize the airframe components during their free fall. Then at 500 ft. it will fire a "main" charge to deploy your main parachute. 

The RRC2L is a "barometric" based altimeter -- it needs to sample air to take its readings and function correctly. It must be solidly mounted in an avionics bay with vent holes in the bay to sample air pressure as the rocket travels up (ascent) and down (descent).

The RRC2L will "beep" out continuity before flight, telling you all connections are GO for flight; and upon landing will "beep" out your max altitude. There is also an LED that blinks in conjunction with the beeps if hearing is a problem. In addition, a very comprehensive collection of flight performance data items (along with settings and diagnostics) can also be viewed using our “plug in” LCD Terminal. Please refer to the LCD Settings​ section in the RRC2L User Manual. 

Connections

BAT+ and BAT- / Connect power from your battery and power switching here

DROGUE / Low current e-match for first charge that fires (apogee)

MAIN / Low current e-match  for second charge that fires (500' main parachute)

Batteries
The RRC2L is designed to be powered by a standard 9-volt alkaline or any 1S or 2S Lithium battery.  Batteries must be mounted solidly in a battery box, zip tied,  etc. If using a 9V battery clip it is advisable to use several wraps of electrical tape around battery and clip, before securing it to the sled. Always check the battery voltage before installing & before each flight! Even new batteries can be defective and have sub-par voltage.

Vent Holes
Vent holes in the avionics bay allow the altimeter to sample air pressure. 
Here are some 3-hole approximation examples for simplicity:

A. 38 mm by 6 in. ( 3 x 1/16” holes )
B.  54 mm by 7 in. ( 3 x 1/8" holes )
C.  3 in. by 9 in. ( 3 x 5/32” holes )
D.  4 in. by 12 in. ( 3 x 3/16” holes )
E.  6 in. by 18 in. ( 3 x 1/4"holes )

Make sure when drilling holes they are clean and clear from fuzz and debris for smooth, clear airflow. Locate your vent holes equally spaced around the avionics bay in a single circumference.  If you want more information about proper venting sizes, refer to the RRC2L User Manual section on Static Pressure Ports 

Pushbutton Programming the RRC2L
The RRC2L “PROG” pushbutton allows you to set the elevation for your main parachute deployment altitude in 100’ increments from a minimum of 300’ AGL up to a maximum of 3000’ AGL. To start the programming operation, tap the pushbutton anytime during the initial 5-second beep. The RRC2L will then “beep out” the currently programmed AGL setting in 100’ increments (a default of 5). After it completes “beeping“ this value, it emits a low “completion” tone, then pauses for 5 seconds, and then starts over. Start tapping the button anytime during that 5 second pause to “tap in” the new desired main elevation you wish to store in the altimeter’s non-volatile memory. Once you complete “tapping in” the new setting, the altimeter will beep an acknowledgement of its memory update with a short, higher pitched “double beep”. Programming is now complete and you can power down to prep your rocket for flight.

Reading the Beeps/Blinks
When you first power up the RRC2L, it will beep for 5 seconds.  After that the altimeter goes through several power up tests and initialization steps.  Once these tests and initialization are complete, the RRC2L beeps continuity readiness pre-launch and after landing will beep out the altitude.

On the pad, with your ejection charges connected to the drogue and main terminals you will have the following beeps/blinks every 5 seconds for continuity (everything is hooked up correct and GO for flight):

Drogue only - 1 beep
Main only - 2 beeps
Drogue & Main - 3 beeps (Dual Deploy)
No charges - 1 Long beep (ride along only)

After flight and upon landing, the RRC2L will beep/blink your maximum altitude (Example:  2340 ft.):
2 beep-beep [pause]
3 beep-beep-beep [pause]
4 beep-beep-beep-beep [pause]
0 long-beep [pause]
low buzz [long pause / beeping repeats]