JRT M88B User manual
M88B Testing User Manual
Ⅰ. Attentions While Using JRT Laser Distance Sensor
Thank you for choosing JRT as your supplier. Before start to test, please read the user
manual carefully and pay special attention to the following points. If there’s something not
clear for you, please contact our related people or after-sales technicians by email
1. Do not touch the modules by bare hands. Electrostatic protection is required. Please wear
static gloves or bracelets in case of any damage to the laser diode or other electronic
components.
2. Do not connect power cord reversely and make sure there’s no connection between
positive pin and negative pin anywhere of the module, for there’s no anti-reverse protection
for modules. Charge with the constant electric current and the constant voltage required in the
User Manual. Please note the voltage can not be over DC3.3V and the current should be over
300mA at the same time. If the DCDC module is used to step-down power supplies, please
note that JRT uses TTL 3.3V, which means the maximum allowed voltage of RX and TX
signal cable is 3.3V. Suggested power supply is DC3.0V.
3. The module’s TXD/RXD pins are in open drain state without built-in pull-up resistors and
RX/TX requires a pull-up resistor of 10K. We can customize the module with pull-up resistor,
please contact us for details.
4. The module should be used under LUX200. The measured objects should have a better
reflection of 70%. The performance will be degraded in hard light condition, please pay
attention to protect lens .
5. Keep our laser sensors away from water and heavy dust. The performance would be
affected if dust gets into lens. It is recommended making housing for dust protection if it’s
necessary.
6. In standard atmospheric pressure environment, the working humidity of the module is less
than 85% and the temperature is within 0~40°C. The storage humidity is less than 60% within
0~30°C. When using under low temperature conditions, please attention to the phenomenon
of water condensation. Make sure the surface is free of frost and water droplets.
7. The module should avoid stress during use. The optical part and the electronic components
on the PCB cannot bear the stress. The structure cannot be repaired if pads or other optical
components are damaged due to stress.
8. Do not point the laser directly to sunlight, extra-strong light or something high reflective
surfaces. If you measure high-gloss materials within 10m, the hardware of module will be
damaged, which will cause the module not working and can not be repaired.
9. Do not over tighten the screws when installing the module. The pressure on the optical
components will affect the performance of the module. The center hole of the U series and M
series is only positioning hole which cannot be used for screwing installation and fixation.
10. Do not change the module structure and components by yourself. If you have special
needs, please contact us.
11. For lens protection and cleaning, please refer to the camera lens. Under normal
circumstances, please gently blow off dust; if you need to wipe the lens, please use a special
lens paper to wipe the surface in one direction; if you need to clean the lens, please use a
cotton swab dipped in a little pure water to wipe in one direction, and then dry with a lens
blower.
12. If you are ready to build housing for the module, please contact us for 3D file of the
module you’re using and confirm your drawing with our hardware engineer. And if possible,
please send us your SOP of assembly to check ifthere is any risk.
13. Pay attention to the heat dissipation. Reserve a certain space for module heat dissipation
when the module is integrated into the device.
14. Glue dispensing and gluing are not recommended at the joint between the optical part of
U module and PCB.
15. It’s recommended that the module is assembled in the same direction as it was made, that
is, right side up. Generally, the side with small label is the up side, and please pay attention to
the pitch adjustment during installation.
16. If the housing have a need of IP67 protection or above, anti-reflective glass is
recommended before lens. The light transmittance should be over 90% and the more the better.
Please notice that any glasses before the lens could lower the performance.
17. The module can be used continuously, in this case, 3000~5000 hours of use time is
guaranteed.
18. If you have any problems or questions during the test, please take photos or videos and
give detailed description to us, the more information sent, the faster respond can be
supplied. If you receive any error code during test, please check it with the error code list in
the manual. If the error code is not listed, please contact us.
Ⅱ. Module Testing
Testing application: JRT;
Connect the module through the USB/RS232/RS485
·Before the test, please wear electrostatic gloves or an electrostatic bracelet, and pay
attention to electrostatic protection.
·When the module power on, it is normal to be a slight light.
·The bare module voltage is DC 3.3v, if RS232 or RS485 is welded, the voltage is DC
5-32v
1. Click to open the JRT, Select the correct serial port number, select 19200 for the baud
rate
2. Click to Open Port, the module is slightly bright
3. Click on Laser On to open the laser beam
4. Click on Measurement or Start Tracking
5. Click to Stop Tracking to end the measurement
6. After the test, click to Close Port, and then power off the module
Testing application: Geshe Beacon;
1. Connect the module through the USB
2. Install the Geshe Beacon:
If you do not have the installation package, you can download it through the following
website:
http://www.geshe.com/en/support/download
3. Open the Command Package, Select the corresponding serial port and baud rate
(19200) and select HEX
Attention: The serial port number must be changed based on the serial port you
are currently connected to.
4. Click to Open Port, the module is slightly bright
5. Click on Laser On, the command returns C1, and the laser turns on
6. Click on 1shot Auto or Cntinus Auto, and read the 7th, 8th, 9th, and 10th data to
calculate the measurement distance.
For example: 00, 00, 19, 50 in calculator, and read the result in DEC.
7. Click Cntinus Exit to end measurement.
8. After the test, click on laser off, then click on close, and then power off the module
9. If it can receive measurement distance normally, connected successful
10. If you have any questions, please contact us by phone or email
