LMBR R2A CHRONOGRAPH, TRIPOD THREADED

BALLISTIC CHRONOGRAPH LMBR R2H (Made in Poland)

The LMBR chronograph does not need ambient light, it does not have antennas, it always works and it only needs two (AA size) 1.5 Volt batteries to work (very low battery consumption).

The ideal chronograph for all projectile speeds.

High Quality Product, manufactured with metal frame with ultra precise sensors, works with normal batteries of 1.5 Volts (2 units included with the device, but we don't guarentee their functional condition. You might need to get new ones before long).

Get the muzzle energy reading directly in joules or ft/lb - You only have to confirm the weight of the projectile to the chronograph, recording it in the same, shoot through the gap, the chronograph will inform you, of the speed of the projectile and of the energy directly calculated in joules or ft/lb (depending on imperial or metric setting)

You can use metric or imperial system - ft.lbs or Joule, FPS or M/S.

Model connectable by bluetooth to mobile phones (Android System) - The bluetooth connector is sold separately on this website

(The Bluetooth module that appears in the image, installed in the chronograph, is not included in the price of the chronograph)

(Not valid for hunting shotguns or muzzleloaders)

How the chronograph works:

• Mount the batteries that accompany the device, are two commercial batteries of 1.5 volts, you have to remove the black plastic cover that appears in the lower part of the chronograph, it is fastened with two screws in the corners, remove the two screws, remove the lid, put the two batteries in place following the drawing that appears in the apparatus and close the lid again. Notice how the lid is placed because it has a posture, the two slots should be placed as they come from the house.
• Press the switch that appears on the back of the chronograph, the screen will light up.
• Of the three buttons that appear on the front, above the screen, the one on the left serves to start the program, press it, with the enter the weight loading mode of the projectile. With the other two buttons, indicate the weight of the projectile, one of the buttons goes up and the other goes down. Once you have reached the right weight, press the left button again, in this way the weight of the projectile is fixed and the device is ready for use.
• Shoot through the appliance window with a distance of the fire nozzle (for air guns) of about 12/15 cm. and about 30/40 cm in the case of a 22 LR caliber firearm and greater distance for heavy weapons. The apparatus will give the projectile speed and energy readings in joules directly.

Application:

In the measurements: air rifles, firearms and archery.

Parameters:

• Velocity: 12 - 2000 m/seg.
• Measurement error: < = 1% @ 1000 m/seg.
• Current consumption: 100 mA
• Power supply: 2AA (alkaline or recahrgable battery)
• Dimensions: (hxwxd) 260x105x100 mm
• Weight: 995 gr.

Funtions:

• Velocity V(m/s)
• Kinetic energy E(J)
• Shooting counter
• Average kinetic energy Esr (J)
• Average velocity Vsr (m/s)
• Minimum velocity Vmin (m/s)
• Maximun velocity Vmax (m/seg)
• Absolut velocity dV= (Vmax-Vmin)
• Standard deviation SV (m/s)
• Velocity in fps V(fps)
• Rate of fire RoF
• Weight of bullet od 0.01 - 50.00 g
• Calibration (settable distance between sensors)
• Memory of 250 measurements of velocities.
• Data transmision to computer

WHAT IS A CHRONOGRAPH ?????
A chronograph is a device that is used to read the speed of the projectiles that we launch with any type of weapon, from a humble slingshot to an Express rifle for big game hunting. Knowing the speed of the projectiles is useful for many things, but mainly, in the subject that concerns us, to obtain ballistic information of the projectiles fired.

We are going to mention some very frequent uses but there are undoubtedly many others that right now we cannot even imagine. In rifles or compressed air pistols, chronographs are often used to find out the constancy of the speed of the projectiles fired in such a way that if the readings are very similar and there are hardly any variations between one and another, that is, between the speed of the projectile one shot and the next, and so on in a series of X shots we can see that the weapon has a good valve or a good regulator or a spring in good condition that makes the projectiles all fly at the same or very similar speed. 

If when making a series of shots with an airgun the readings are irregular with large jumps in the velocity of the projectile, we already have a major problem because the rifle will not group correctly. Different speeds of the projectile, very disparate, will cause defects in the grouping of the impacts, this denotes a malfunction of the valve / regulator in a PCP rifle or in the spring and compression system of a piston rifle or any other failure related to this and that can occur in pneumatic rifles (friction, dragging, pieces or broken tires etc.) in any case a defect or fault that must be found and fixed so that the constancy of the shots is adequate again.

The constancy in the speed of the projectiles does not imply perfect precision, at all, but we can say that it is the first and fundamental step for a weapon to be accurate.
The use of one pellet or another, with one shape or another and with one weight or another will provide variations in the speed of the projectile. With the chronograph we can find the pellet that is closest to the ideal speed for the caliber we are using for the sake of maximum precision or for any other purpose.

In the case of firearms, the chronograph is even more useful than with compressed air weapons since, in addition to the most common functions that we have mentioned above, it will also allow us to check the suitability of the cartridges reloaded by us with respect to the energy, speed and constancy of the same. Well reloaded cartridges will maintain a constant speed, poorly reloaded cartridges will do the opposite.