Wedge and phone

The phone must sit pushed into its corner and clamped, so it can’t shift or rock. If it can move in the bracket, every reading will be wrong.

1. Choose your wedge

1. Measure the phone in its case, at its widest point. Lay a ruler across it with the case on.
2. Use the short set for left-side buttons. With the screen facing you, a phone with buttons on its left side takes a short wedge. A phone with none there takes a long one.
3. Pick the wedge marked with your band. An 83 mm phone takes the 82-85 wedge. The wedge finder works it out for you.

2. Put the phone in

1. Phone in, screen up, top against FRONT. Slide it forward until its top touches the front end and its right side touches the rail.
2. Drop the wedge in, thin end first. It goes into the gap on the left side of the phone, thin end toward the front.
3. Press the phone down. Push the wedge. One finger presses the phone flat while another pushes the wedge’s tab toward the front until it stops. Push it again once the bracket is at the outdoor temperature.

Choose Your Wedge

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Phone in the Bracket

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3. Check it

• Press on the far edge of the bracket: the phone shouldn’t tilt or rock.
• The phone’s right-side buttons sit in the window in the rail. Nothing should press a button.
• A phone whose camera bump starts at its top edge sits slightly nose-up on the ledge at the front. That is normal; calibration corrects for it.

To take the phone out, pull the wedge’s tab and lift the phone. Each time the phone goes back in, push it into its corner and lock the wedge the same way.