How to check if PEMF is operational?

To make it easy for customers to confirm that the PEMF function is working, each mat includes a PEMF tester — a small plastic vial with a tiny metal cylinder inside.

We cannot feel PEMF with our body’s sensors. However, when the PEMF function is ON and you place the vial on the mat above a PEMF coil, the metal piece will begin to move and rattle, indicating the function is active.

This movement is the reaction of the metal (a static magnet) inside the vial to the magnetic field pulses from the mat’s coils.

The magnetic field is strongest directly above the coil and gradually decreases. With this simple tester, it becomes non-detectable at about 6–8 inches away. To check the coils, move the tester along the center line of the mat while PEMF is ON. Move it slowly across the surface until you locate the active areas.

Ereada® Purple mats (sizes larger than Mini) have at least three PEMF coils in the upper body area. They are usually positioned along the middle line, closer to the logo, and evenly spaced from the mat’s edges.

Summary of PEMF testing

The closer the tester is to the PEMF coil, the stronger the metal movement. As you move away, the motion decreases and eventually stops. This does not mean the magnetic field disappears — only that it becomes too weak for this tester to detect.

You can also watch the PEMF testing video on the Ereada® YouTube channel:

Purple Ereada® Amethyst Mats — PEMF Magnetic Pulsation.

Place the tester on the previously located coil area.

1. Turn ON the PEMF function.

2. Press the PEMF button repeatedly until it shows “Level 8.” The indicator lamps in the controller (built-in PEMF tester) will begin blinking.

   Locate the PEMF coils. There are:

   • 2 coils in the Mini
   • 3 in the Midsize
   • 4 in the Professional
   • 5 in the Single

Move the vial about half an inch above the mat to find them.

The PEMF program cycles 20 minutes ON and 100 minutes OFF. It repeats four cycles when the timer is set for 8 hours or longer. The PEMF indicator light may stay ON the entire time (6 hours 20 minutes), but the PEMF is only active for 20 minutes every 2 hours. The tester will only react during those active cycles.

To be sure PEMF is currently active, press the PEMF button right before testing.

Ereada® PEMF controllers offer adjustable frequencies in the very low-frequency range between 8 and 64 Hz. Since 2019, there have been nine settings. Press the PEMF button repeatedly to choose the level. The controller briefly displays the PEMF level (1–9), then switches back to the temperature setting (1–7).

The indicator blinks slowly or quickly depending on the level:

• Level 1 — 8 Hz
• Level 2 — 16 Hz
• Level 3 — 24 Hz
• Level 4 — 32 Hz
• Level 5 — 40 Hz
• Level 6 — 48 Hz
• Level 7 — 56 Hz
• Level 8 — 64 Hz
• Level 9 — automatic program cycling between 8–64 Hz every 1–2 seconds

These mats also contain twelve static (permanent) magnets in the lower body area. Static magnets generate magnetic fields independently from the PEMF system.