Manual

SF11 Laser altimeter
Product manual
Revision history
Version
Date
Author
Comments
Rev 9
2019/02/26
TLP
Add a note to the Serial interface section: “The default baud rate is 115200 bps” (page 7).
Rev 8
2018/05/29
TLP
Included the SF11/B model (page 2, 4). Updated all references to the analog voltage range option
“0.00 V … 2.56 V” to “0.00 V … 2.048 V”. This change is applicable to SF11/B firmware revision
1.0.0, SN: S11-01500 onwards and SF11/C firmware revision 1.0.0, SN: S11-14500 onwards (pages
5, 7, 11, 12,13, 19). Updated “4. Specifications of the SF11” item “Range” to a minimum of “0.2”
meters (page 4). Update the serial port baud rate range from “9600 … 115200” to “9600 to
921600” (pages 5, 7, 10). Updated “Appendix E :: Command set” “Model no. and firmware
revision” table entries (page 19).
Rev 7
2017/10/03
TLP
Updated branding and layout of this document has resulted in page number changes to
previous revision history entries.
Included the cautionary notice “Radio-frequency interference can be picked up directly on the
sensor circuit electronics, the power lines and the communication lines. Ensure appropriate
distance or shielding between the sensor, cables and any radio-frequency transmitter.” (page 4).
Include USB running mode description and “Figure 4 :: LightWare Terminal showing running
mode”(page 4). Updated FDA accession number “1410968-002 (2017/09)” in “Specifications of
the SF11” (page 4). Amended the “Serial port output type” menu item <f> commands “#SU,
0<CR><LF>” and “#SU,0 0<CR><LF>” to “write” commands (page 10, 19).
Rev 6
2016/09/14
TLP
Updated FDA accession number “1630995-000 (2016/09)” in “Appendix A :: Specifications” (page
15).
Rev 5
2016/06/06
TLP
Updates to this document revision are applicable from SF11/* firmware revision 1.21,
SN: S11-10345 and S11-10351 onwards. Change of default I2C address from 0x55 to 0x66 to
improve compatibility with PixHawk (page 7). Include the the caution “Ensure that a unique I2C
address is assigned to the SF11 and that no other devices share this address” (page 7).
Rev 4
2016/05/19
TLP
Updates to this document revision are applicable from SF11/* firmware revision 1.2,
SN: S11-10171, SN: S11-10186, SN: S11-10210, SN: S11-10215, and SN: S11-10230 onwards.
Updated “2. Quick start guide” (page 4) and “4. Menu options” (page 8) to reflect new menu
structure. Increase update rate from 16 to 20 readings per second (pages 1, 15). Removed the
“Adaptive filter” menu and graph as this functionality has been replaced with a permanent
smoothing filter. Removed menu “l: Confirm recovered signal” as restart validation is no longer
necessary as there is no chance of noise. Added a new menu “c: Measuring mode” with selections
of “long range” or “quick response” (pages 8, 9). Added a new menu “f: Serial output mode” with
selections of “on demand” or “continuous” (pages 8, 9). Added a new menu “g: I2C bus
address” (pages 8, 9). Added a new menu “l: Alarm hysteresis” (pages 8, 12). Included “Appendix
F :: Command set” (page 19).
Rev 3
2016/03/07
TLP
Update I2C feature “up to 400 kHz” in “Appendix A :: Specifications” (page 12).
Rev 2
2016/02/02
TLP
Updates to this document revision are applicable from SF11/* SN: S11-00898, firmware
revision 1.1. Update software menu “e: Show the analog output menu” to “e: Show analog and
alarm menu” (pages 4, 8. figure 8). Update software menu “f: Analog distance range” to “f:
Active distance range” (pages 4, 8). Update software menu “g: Linear analog output” to “g:
Output voltage range” (pages 4, 9). Update software menu “h: Analog polarity” to “h: Linear
analog output | h: Switching alarm output” (pages 4, 9).
Rev 1
2016/01/29
TLP
Update minimum range on natural targets to “0.1” in “Appendix A :: Specifications” (page 12).
Update FDA accession number “1410968-002 (2016/01)” in “Appendix A :: Specifications” (page
12).
Rev 0
2015/11/13
JEP
First edition
SF11 Laser altimeter - Product manual - Revision 9 | of | © LightWare Optoelectronics (Pty) Ltd, 2019 | www.lightware.co.za 20 20