# Usage Instructions

#### **Initial Setup**

First, connect the USB connector of the <span class="s1">**Lens Heater Strip**</span> into the <span class="s1">**USB Power Output**</span> socket of the <span class="s1">**Lens Heater Controller**</span>.

Next, connect a suitable power source to the <span class="s1">**Power Input**</span> socket of the Heater Controller. The power source must have a voltage between **6V to 18V** and be rated to provide at least **1.5 Amps** of continuous current.

As soon as power is connected, the Heater Controller's LCD display will light up red and the controller will enter into the programming stage.

#### **Programming the Controller**

There are three settings that can be altered: <span class="s1">**Delay**</span>, <span class="s1">**On time**</span> and <span class="s1">**Level**</span>.

Press the <span class="s1">**M**</span> button to cycle through these three settings. A red light will glow next to the currently selected setting.

Press the <span class="s1">**▲**</span> button to increase the current setting. Press the <span class="s1">**▼**</span> button to decrease the current setting.

#### **Setting Descriptions**

<table id="bkmrk-setting-range-descri" style="width: 100%;"><thead><tr><th style="width: 15%;">**Setting**</th><th style="width: 15%;">**Range**</th><th style="width: 70%;">**Description**</th></tr></thead><tbody><tr><td style="width: 15%;"><span class="s1">**Delay**</span></td><td style="width: 15%;">0–24</td><td style="width: 70%;">Number of hours the controller should remain inactive (not heating) before heating begins</td></tr><tr><td style="width: 15%;"><span class="s1">**On time**</span></td><td style="width: 15%;">0–24</td><td style="width: 70%;">Number of hours the controller will remain active (heating) after the Delay period ends</td></tr><tr><td style="width: 15%;"><span class="s1">**Level**</span></td><td style="width: 15%;">L1, L2, L3</td><td style="width: 70%;">Heating power level (**L1** = lowest/most efficient, **L3** = highest/least efficient)</td></tr></tbody></table>

<p class="callout info">Note: The total "Delay" plus "On time" cannot exceed 24 hours.</p>

#### **Starting the Program**

Once the desired <span class="s1">**Delay**</span>, <span class="s1">**On time**</span> and <span class="s1">**Level**</span> have been set, you should not press any buttons on the Heater Controller. The heating program will commence running **1 minute** after the last button-press occurred, and the LCD display will shut off to conserve energy.

#### **Changing Settings**

If the heating program has already commenced and changes subsequently need to be made to the <span class="s1">**Level**</span>, <span class="s1">**Delay**</span> or <span class="s1">**On time**</span>, then the power source should be disconnected and reconnected to ensure that the new settings are registered correctly.