How To Reset A TRUE METRIX Glucose Meter: System Reconfiguration And Diagnostics Guide

Resetting a TRUE METRIX glucose meter requires executing a power-cycle soft reset by removing the standard CR2032 lithium battery or reconfiguring operational parameters using the top "S" button. Because Trividia Health designs these FDA-cleared devices to preserve historical patient logs for clinical compliance, stored test results cannot be manually wiped; instead, the internal 500-result memory automatically overwrites old data on a First-In, First-Out (FIFO) basis.

Pre-Reset Diagnostics & Equipment Setup

Before initiating a system reset or reconfiguring your TRUE METRIX blood glucose monitoring system, verify that all diagnostic assets are available and operating within specified clinical parameters. Soft resetting the meter restores hardware clock functions and clears momentary processor lockups, but it does not bypass basic hardware operational requirements.

• Essential Diagnostic Equipment:
  
  
  • TRUE METRIX, TRUE METRIX AIR, or TRUE METRIX GO Blood Glucose Meter
  • Fresh 3-Volt Lithium Coin Cell Battery (Type CR2032)
  • TRUE METRIX Control Solution (Level 1 or Level 2 for calibration verification)
  • TRUE METRIX Self-Monitoring Blood Glucose Test Strips (unexpired, unopened vial)
• Mandatory Operating Standards:
  
  
  • ISO 15197:2013 system accuracy standard adherence
  • Operating Temperature Window: 41°F to 104°F (5°C to 40°C)
  • Relative Humidity Range: 10% to 90% (non-condensing)
  • Hematocrit Range: 20% to 60%
• Time & Resource Benchmarks:
  
  
  • Estimated Duration: 3 to 5 minutes for complete setting re-initialization
  • Budget Benchmark: $0 (utilizing existing hardware) or $3–$6 (for replacement CR2032 battery)

Step-by-Step TRUE METRIX System Reconfiguration

Step 1: Execute a Hardware Power-Cycle (Soft Reset)

A soft reset clears micro-controller logic errors, temporary screen freezes, and hardware non-responsiveness without altering your stored blood glucose testing history.

1. Turn the TRUE METRIX meter face down so the battery door on the back of the device is accessible.
2. Push down on the battery latch tab and slide the battery door away from the main housing.
3. Remove the existing 3V CR2032 lithium battery from the compartment. Use a non-metallic object if necessary to prevent short-circuiting the battery contacts.
4. Leave the battery out of the device for a minimum of 30 full seconds. This allows the internal capacitors to discharge fully, wiping temporary volatile memory caches.
5. Re-insert the CR2032 battery with the positive plus sign (+) facing upward toward you.
6. Snap the battery door back into position until the plastic retention tab clicks shut. The meter will perform an automated self-test, displaying all screen segments briefly before entering standby or date/time setting mode.

Warning: Do not use metallic tweezers or screwdrivers to pry out the CR2032 coin cell. Contacting the positive top terminal and negative side rim with metal can short-circuit the battery, causing permanent cell degradation or motherboard voltage spikes.

Step 2: Access the System Set Mode

Re-establishing accurate date, time, and testing targets is essential for correct mathematical averaging (7-, 14-, and 30-day averages) and electronic logbook integration.

1. Ensure the meter is powered off with no test strip inserted in the top test strip port.
2. Locate the "S" (Set) button situated on the top edge of the TRUE METRIX meter body.
3. Press and hold the "S" button until the display powers on and shows the full display screen, followed by the blinking time format menu.
4. Release the button. You are now inside the active firmware setup menu.

Step 3: Program Clock Format, Time, and Date Parameters

1. Clock Format (12hr vs. 24hr): With the display blinking "12H" or "24H", press the bottom "C" (Count/Memory) button on the front of the meter to toggle between standard 12-hour (AM/PM) and 24-hour military time formats. Press the "S" button once to lock in your selection.
2. Hour Setting: The hour digits will begin flashing on the LCD panel. Press the "C" button repeatedly until the current, correct hour appears. Pay close attention to the "AM" or "PM" indicator if operating in 12-hour mode. Press the "S" button to confirm.
3. Minute Setting: The minute digits will begin flashing. Press the "C" button to advance the minutes to the exact current minute. Press the "S" button to commit the setting.
4. Year Setting: The four-digit year display will flash. Cycle through the numerical sequence using the "C" button until the correct calendar year is displayed, then press "S".
5. Month & Day Setting: The month digit will flash first. Adjust using "C", confirm with "S". Next, the day digit will flash; adjust using "C", and finalize by pressing "S".

Pro-Tip: Accurate time programming is vital if you sync data via TRUE Manager Air Mobile Software or export readings to an Electronic Health Record (EHR) system. Incorrect dates cause clinical software to misalign blood glucose trends.

Step 4: Configure Event Tags, Testing Reminders, and Target Zones

Following date/time setup, the firmware cycles directly into functional user alerts.

1. Audible Beep Toggle: The display will show an icon of a speaker alongside "On" or "OFF". Press "C" to switch between enabling or disabling the internal alert buzzer. Confirm by pressing "S".
2. Event Tagging Setup: The tag feature allows you to flag tests as Pre-Meal, Post-Meal, or Exercise. Press "C" to turn Tag functionality "On" or "OFF", then confirm with "S".
3. Control Test Target Zones: Set your upper and lower warning thresholds if utilizing custom patient parameters. Toggle values using "C" and store them using "S".
4. Alarm Reminders: The meter supports up to four daily testing alarms (A-1, A-2, A-3, A-4). Toggle each alarm "On" or "OFF" with "C". If toggled "On", set the desired hour and minute using the same method as system time configuration, confirming each entry with "S".
5. To exit setup mode at any stage, insert a TRUE METRIX test strip or press and hold the "S" button until the screen turns completely off.

Step 5: Reset Bluetooth Smart Pairing (TRUE METRIX AIR Models Only)

If your TRUE METRIX AIR model fails to transmit reading payloads to your iOS or Android device via Bluetooth Low Energy (BLE), you must clear and re-establish the wireless link.

1. Open your smartphone’s operating system settings, locate the Bluetooth device list, select "TRUE METRIX AIR", and choose "Forget Device" or "Unpair".
2. Turn off the mobile phone’s Bluetooth module for 10 seconds, then toggle it back on.
3. Power off the TRUE METRIX AIR meter.
4. Press and hold the top "S" button on the meter for 5 to 7 seconds until the Bluetooth wireless symbol appears flashing on the LCD panel.
5. Launch the TRUE Manager Air App on your smartphone and select "Add New Device".
6. Input the 6-digit PIN printed on the label located on the back of your TRUE METRIX AIR meter when prompted by the app to finalize pairing recovery.

TRUE METRIX Hardware Models & Specification Matrix

Diagnostic Error Codes & System Recovery Protocols

When hardware malfunctions, battery degradation, or test strip chemistry failures occur, the TRUE METRIX system halts processing and displays an error code on the LCD matrix. Execute the specific recovery actions detailed below to resolve hardware faults.

Error Code E-1: Meter Temperature Out of Range

• Root Cause: The internal thermistor detects that ambient environmental temperature is below 41°F (5°C) or above 104°F (40°C), preventing accurate enzymatic electrochemical reaction calculations.
• Actionable Fix: Relocate the meter, test strips, and control solution to an climate-controlled indoor space maintained between 68°F and 77°F (20°C to 25°C). Allow the hardware to acclimate for at least 30 minutes before re-testing. Do not heat or refrigerate the meter artificially.

Error Code E-2: Sample Application Error or Used Strip Re-insertion

• Root Cause: The capillary action of the test strip filled too slowly, received an inadequate blood volume ($<0.5 \mu L$), or a previously used, chemically degraded test strip was inserted into the port.
• Actionable Fix: Remove and discard the current test strip. Perform a soft reset by opening the battery door, taking out the CR2032 battery for 10 seconds, and reinstalling it. Insert a brand-new, unexpired TRUE METRIX test strip. Ensure the sample application tip touches the blood drop cleanly, drawing blood rapidly via capillary action without smearing.

Error Code E-4: System/Hardware Malfunction or Circuit Interruption

• Root Cause: An internal hardware integrity self-check failed, often caused by a voltage drop during testing, corrupted volatile memory registers, or physical fluid ingress into the top strip port.
• Actionable Fix: Remove the test strip immediately. Extract the CR2032 lithium battery. Inspect the battery housing contacts for corrosion or fluid contamination; clean with a dry cotton swab if necessary. Install a fresh, factory-sealed CR2032 battery. Perform a control solution test using Level 1 or Level 2 TRUE METRIX Control Solution. If E-4 persists after a fresh battery installation, the internal integrated circuitry is damaged, requiring device replacement.

Diagnostic Failure: Display Remains Completely Blank Upon Strip Insertion

• Root Cause: Total depletion of the CR2032 coin battery, upside-down battery orientation, oxidized terminal contacts, or debris blockage inside the test strip port cavity.
• Actionable Fix: Slide off the rear battery door. Remove the CR2032 cell and inspect orientation; reinstall ensuring the positive (+) side faces up. If the screen remains unresponsive, replace the battery with a known functional 3V coin cell. Inspect the strip port with a flashlight to verify no lint, dried blood, or paper fragment is preventing the strip's metallic contact pads from connecting with the internal sensor pin array.

Frequently Asked Questions

Can I delete individual readings or completely erase the memory on my TRUE METRIX meter?

No, individual readings cannot be manually selected, deleted, or bulk-erased from the internal memory. Trividia Health implements this software restriction in compliance with medical device monitoring standards to ensure patient history remains tamper-proof. Old readings are automatically cleared as new tests are logged once the device reaches its 500-result capacity using a First-In, First-Out (FIFO) algorithm.

Will taking out the battery reset my saved blood glucose reading history?

No. Saved blood glucose records, control solution tests, and averages are written to non-volatile EEPROM memory chips. Removing or changing the CR2032 lithium battery will only reset volatile hardware data such as the internal clock, real-time date settings, and active diagnostic error loops. Your historical log remains fully preserved.

How do I reset the meter so it stops asking for a control solution test?

The TRUE METRIX meter does not lock you into mandatory control solution testing modes unless a control solution test is currently active. If a control bottle symbol is flashing on your LCD screen, you accidentally entered Control Mode. Simply remove the test strip from the top port without applying solution, wait 5 seconds for the screen to shut off, and re-insert a fresh test strip to perform a normal blood glucose test.

What should I do if my meter displays "EEE" or an unlisted screen error?

An "EEE" code indicates an unhandled firmware error or severe hardware timing fault. Remove the CR2032 battery for 60 seconds to execute a full system logic dump. Re-insert the battery, reset your date and time parameters using the top "S" button, and insert a new test strip. If the display still reads "EEE", contact Trividia Health Technical Support for a warranty replacement.

Medical Device Support & Quality Assurance

Maintaining accurate date, time, and calibration settings on your blood glucose monitor ensures your diabetes management team receives reliable clinical data. If your system continues to output hardware error codes after performing a full power-cycle reset and fresh CR2032 battery installation, contact Trividia Health Customer Care or your medical equipment provider to claim warranty replacement services.