Frequently Asked Questions (FAQ) – Go-Keto Meter

By Go Keto

Frequently Asked Questions (FAQ)

Glucose and Ketone Meter

Here you will find answers to the most frequently asked questions about your Go-Keto Meter, test strips and app.

Important points before you begin

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Meter settings

Make sure you are using the correct unit of measurement, test strips and code chip.

More information →

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Testing procedure

Wash and dry your hands thoroughly and always use the second drop of blood.

More information →

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User manual

View the full Go-Keto Meter manual for detailed setup, testing and usage instructions.

View user manual →

Frequently Asked Questions

Error E-2 – Test strip removed during testing

Error E-2 means that the test strip was removed from the meter while the test was in progress.

How can this happen?

The test strip was accidentally pulled out or moved during the measurement.
The strip was not fully inserted into the meter.

What should you do?

Remove the test strip and discard it.
Take a new, unused test strip.
Insert the strip fully into the meter.
Wait until the blood-drop symbol starts flashing on the display.
Apply the blood sample by gently touching the drop with the tip of the strip.
Make sure the strip remains in place until the measurement is complete.

Important

Do not remove, move or adjust the test strip while the meter is performing the test.

Error E-3 – Blood sample applied too soon

Error E-3 means that the blood sample was applied to the test strip before the meter was ready to perform the measurement.

Possible causes

Blood was applied before the blood-drop symbol appeared on the display.
The testing procedure was performed in the wrong order.

What should you do?

Remove the test strip and use a new, unused strip.
Insert the test strip into the meter first.
Wait until the blood-drop symbol starts flashing on the display.
Only then prick your finger with the lancing device.
Wipe away the first drop and use the second drop of blood.
Gently touch the blood drop with the tip of the test strip.
Allow the strip to draw in the blood automatically.

Important
Always follow the correct testing sequence: insert the strip first, wait for the flashing blood-drop symbol, and only then apply the blood sample.

Error E-4 – Used or incorrectly handled test strip

Error E-4 means that the meter reads the test strip as used or contaminated.
The meter believes that the strip has already been used and therefore cannot perform the measurement.

How can this happen?

This usually happens when the test is performed in the wrong order or when blood is applied before the meter is ready.

Blood was applied to the test strip before the strip was inserted into the meter.
Blood was applied before the flashing blood-drop symbol appeared on the display.
The test strip was inserted incorrectly, upside down or backwards.

A. The test was performed in the wrong order

If you have not used a glucose or ketone meter before, you may accidentally perform the test in the wrong sequence.

Do not apply blood to the strip first and then insert the strip into the meter.
Always insert the test strip into the meter first. Only apply blood after the meter displays the flashing blood-drop symbol.

B. The blood-drop symbol was not yet flashing

If blood is applied too quickly, the meter is not ready yet. This may cause error E-4.

Correct testing procedure

Take a new, unused test strip.
Insert the test strip correctly into the meter.
Check that the code number on the screen matches the code for the test strips.
Wait until the blood-drop symbol flashes on the display.
Only then prick your finger with the lancing device.
Wipe away the first drop of blood and use the second drop.
Hold the meter with the inserted strip in your other hand.
Gently touch the blood drop with the tip of the test strip.
The blood will automatically be drawn into the strip.
Check that the channel inside the strip fills completely.
The meter will count down and display the test result.

Important tip

Each test strip contains a built-in capillary tube with a small opening at the tip.
When the tip of the strip touches the blood drop, the capillary tube automatically draws the blood into the strip.

Only a small blood drop is required. Do not apply blood or control solution to the flat top surface of the test strip, as the liquid will not enter the capillary channel correctly.

Error E-5 – Not enough blood

This error code means that there is not enough blood on the test strip to perform the test.

Possible causes

The blood drop was too small.
Blood was applied to the flat surface of the strip.
The strip was pressed too firmly against your finger.
The opening at the tip of the strip was blocked.

What should you do?

Wash and dry your hands thoroughly.
Warm your hands and make a fist several times.
Insert a new test strip into the meter.
Wait for the flashing blood-drop symbol.
Wipe away the first blood drop.
Gently touch the second drop with the tip of the strip.

Measuring glucose and ketones with one finger prick

Yes, you can measure both glucose and ketones with the Go-Keto Meter using one finger prick.

How it works

Blue code chip: used for ketone testing.
White code chip: used for glucose testing when opening a new box of glucose test strips.
After calibration, the blue code chip can remain in the meter.
The glucose code chip only needs to be inserted again when opening a new box of glucose test strips.

Control solution test – Checking meter accuracy

The small bottle included in your starter kit contains control solution. Use it to check whether your meter and test strips are working correctly.

How to perform a control solution test

Shake the bottle of control solution.
Apply one drop to a clean surface.
Insert a test strip into the meter.
Touch the drop with the tip of the test strip.
Wait for the countdown.
Compare the result with the control range printed on the test-strip packaging.

Result within the control range
Your meter and test strips are working correctly.

Result outside the control range
Repeat the test with a new test strip. If the problem continues, contact our customer service team.

Different readings – Understanding your results

It is normal for home test results to differ from laboratory results or even from another home test.

Why can results vary?

Sample type: The Go-Keto Meter uses capillary blood from a finger prick, while laboratories often use venous blood.
Technology: The Go-Keto Meter uses electrochemical analysis, while laboratories may use a different testing method.
Timing: Glucose and ketone levels change throughout the day and may be influenced by food, exercise and fasting.

Important to know

Glucose levels may change depending on the time since your last meal.
Ketone levels generally increase during fasting, a low-carbohydrate diet or after prolonged exercise.
Test under consistent conditions to monitor your personal trends.

Can I switch between mmol/L and mg/dL?

The unit of measurement cannot be changed in the meter settings.

When purchasing a Go-Keto Meter or GK Dual Meter, you select either the mmol/L or mg/dL model.

Ketone values are measured in mmol/L. The unit used for glucose measurements depends on the model and the standard used in your country.

Available glucose units

mmol/L
mg/dL

Accurate. Reliable. Easy to use.

The Go-Keto Meter is designed for people who take their health seriously. Measure your glucose and ketone levels quickly and reliably, wherever you are.