DNT Optics App Instructions
1. Introduction
The DNT Optics app is designed for use with DNT (Arken) digital products such as the Zulus day/night scope and the ThermNight TNC multispectral scope.
It combines the features of the still functional Arken Optics app and the Arken Ballistic app and removes some material relevant only to Arken glass scopes.
2. Main features
The app can connect to the scope by both Bluetooth and Wi-Fi rather than having one app that connects via Bluetooth and another app that connects via Wi-Fi.
Ballistic data entry is simplified and when connected to a scope with suitable firmware, up to 5 ballistic profiles can be transferred to the scope by Wi-Fi. Ballistic table transfer by Bluetooth is also available.
3. Accessing the App and connecting to a scope by Wi-Fi
Once downloaded and installed, tapping the DNT icon on your device will open. This page and when Add Device is tapped-this page.
Tap on Zulus HD Digital Scope and any scopes which have previously been connected or available will be shown. When a previously connected device is re-connected or a new device connected for the first time, the status of their connection will change to Connected.
Bluetooth on the scope must be switched on. On the front page of the app, tap Ballisitcs to open the Ballistics page shown below and then tap on the bluetooth icon to show the connection record and any scopes availble to connect.
Go to the Ballistics page and note that the ballistic data shown is for the “Default” ballistic profile. To create a new ballistic profile, tap on “Default” and the ballistic data for the default profile will be shown, but note the blue arrow near the top of the page.
Tap on the blue arrow and on the next page tap Add and then on the following page, enter the name you want to use for this specific ballistic profile and then tap Save Multiple ballistic profiles can be created using this method.
The ballistic data entry page now opens.
c. Scope height, i.e. the distance from the center of the objective lens to the bore of the rifle.
d. Enter twist rate and direction if known, but this parameter has minimal effect except for very long range shooting.
e. Bullet/pellet data can be entered manually or selected from the “Ammunition Database” which is accessed by tapping on the blue arrow to the right of "Select Factory Ammo"
f. Bullet/pellet weight, velocity and ballistic coefficient are the most important parameters. Calibre and length have little or no effect on the result of the ballistic calculation.
g. Tap Save to save the ballistic profile.
6. Creating a ballistic table and sending it to the scope by Bluetooth
On the Ballistics page, tap Ballistic Table and the page shown below opens.
This page is a Ballistic Table showing the bullet drop (or rise) at various distances based on the ballistic data entered for the ballistic profile selected. When tapped, the gear icon at the top of the page opens another page which allows the user to select the units being used, the start and finish distances for the table and what data is to be shown.
Note the blue paper aeroplane icon at the top of the screen. This indicates that the scope and the phone are connected by Bluetooth and when the icon is tapped, the ballistic table will be sent to the scope. When Ballistic Table is selected in the Ballistic Options menu in the scope, the ballistic table will be used by the scope to calculate the point of aim.
Note that the scope can only hold one ballistic table at any time and any ballistic table sent from the app to the scope will overwrite any ballistic table already in the scope. This is the same method as used in the Arken ballistics app. The black arrow on a white background icon at the top of the page allows the ballistic table to be exported to another device or computer as an Excel file (.xslx)
7. Sending ballistic data to the scope using Wi-Fi
The scope can hold up to 5 sets of ballistic data and these are sent to the scope by Wi-Fi. When Ballistic Calculation is selected in the Ballistic Options menu of the scope and one of the sets of ballistic data is selected for use, the scope uses that data to perform the ballistic calculation and display the point of aim.
8. Firmware update
Keeping the firmware in the scope up to date will optimise scope performance.When the scope is connected to the app, any firmware updates available will be indicated as shown below. Tapping Firmware Update will display the version of the update available. Tapping Update will prompt the user to switch to an internet connection.
Typically, this will be the users own Wi-Fi network or another available Wi-Fi network.
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