On Call Plus Glucometer & Test Strips Complete Guide: Compatibility, Coding, Error Codes & Packs
Dr Pramod kumar
The On Call Plus Blood Glucose Monitoring System from ACON is designed for routine blood glucose self-monitoring using compatible On Call Plus Test Strips.
If you already own an On Call Plus meter, choosing the correct strips, understanding the code-chip system and following proper strip handling are important for reliable operation. This guide brings together the key information about the On Call Plus glucometer, compatible test strips, pack sizes, coding, error messages, expiry, storage and troubleshooting.
Looking for the complete On Call family instead? Visit our On Call Glucometers & Test Strips Complete Guide covering On Call Plus, On Call Extra and On Call GK Dual.
Ready to shop? Browse the On Call Plus Glucometer & Test Strips Collection .
What Is the On Call Plus Glucometer?
The On Call Plus is a portable blood glucose meter designed for testing glucose in fresh capillary whole blood using compatible On Call Plus Blood Glucose Test Strips.
The meter uses biosensor-based electrochemical testing and is designed to provide a glucose reading from a small blood sample in a relatively short period of time.
Unlike some newer no-coding glucose meters, the traditional On Call Plus platform uses a code-chip based calibration system. Correct strip compatibility and correct coding therefore matter when preparing the meter for use.
On Call Plus Key Specifications
| Feature | On Call Plus Specification |
|---|---|
| Test type | Blood glucose |
| Sample | Fresh capillary whole blood |
| Minimum sample size | Approximately 1 µL |
| Test time | Approximately 10 seconds |
| Measurement range | 20–600 mg/dL |
| Memory | Up to 300 results with date and time |
| Averages | 7, 14 and 30 days |
| Calibration | Plasma-equivalent |
| Coding | Code-chip based system |
| Battery | 1 × CR2032 3V coin-cell battery |
| Operating temperature | Approximately 5–45°C |
| Hematocrit range | Approximately 30–55% |
Specifications can vary with product generation, market and packaging. Always follow the user manual supplied with your specific meter and test-strip batch.
Which Test Strips Work with On Call Plus?
The most important compatibility rule is simple:
Use On Call Plus Test Strips with an On Call Plus meter.
Do not select strips merely because another meter carries the On Call brand name.
- On Call Plus meter → On Call Plus Test Strips
- On Call Extra meter → On Call Extra Test Strips
- On Call GK Dual → model-specific glucose and ketone strip systems
On Call Plus strips should therefore not be treated as interchangeable with On Call Extra or GK Dual strips.
For a detailed model-matching explanation, read:
On Call Plus Test Strip Compatibility Guide →
Shop On Call Plus Test Strips
Microsidd offers different On Call Plus strip quantities for customers with different testing frequencies and requirements.
On Call Plus Test Strips 50
The standard 50-strip option is suitable for customers looking for a regular replacement pack.
Shop On Call Plus Test Strips 50 →
On Call Plus Test Strips 100
Customers who test more regularly may prefer a larger 100-strip quantity.
Shop On Call Plus Test Strips 100 →
On Call Plus Test Strips 200 Hospital Pack
The larger hospital-pack option may be useful for higher-frequency users, clinics and professional requirements where appropriate.
Shop On Call Plus Test Strips 200 Hospital Pack →
Individually Foil-Packed On Call Plus Strips
Microsidd also carries selected individually foil-packed On Call Plus strip configurations, subject to stock availability.
On Call Plus Test Strips 50 vs 100 vs 200
| Pack | Suitable For | Important Consideration |
|---|---|---|
| 50 strips | Standard replacement quantity | Convenient for many regular users |
| 100 strips | More frequent testing | Check batch expiry before buying larger quantities |
| 200 strips | Higher-volume requirements | Consider usage rate, expiry and proper storage |
Buying the largest pack is not automatically the right choice for every customer. The strips should be used within the applicable manufacturer expiry period and stored according to the instructions supplied with the product.
For more detail, read:
On Call Plus Test Strips 50 vs 200: Pack Selection Guide →
On Call Plus Glucometer Options
Microsidd offers the On Call Plus system in several configurations, including meter-only and meter-plus-strip combinations.
On Call Plus Glucometer
Shop On Call Plus Glucometer →
On Call Plus Complete Starter Kit
For customers starting with the system, the complete kit combines the meter with compatible testing accessories.
Shop On Call Plus Glucometer Kit →
On Call Plus Meter with 25 Strips
Shop On Call Plus Meter with 25 Strips →
On Call Plus Meter with 50 Strips
Shop On Call Plus Meter with 50 Test Strips →
On Call Plus Meter with 200 Strips
Shop On Call Plus Meter with 200 Test Strips →
How Does the On Call Plus Code Chip Work?
The traditional On Call Plus system uses a code chip associated with its test-strip system. This helps configure the meter for the applicable strip calibration.
Users changing to a new supply of strips should follow the instructions provided with the strips and meter rather than assuming that an existing code setup is appropriate for every new pack.
If the meter displays a coding-related warning or does not recognise the code chip, do not repeatedly use additional test strips without checking the setup.
Our dedicated guide explains coding in greater detail:
On Call Plus Code Chip & Coding Guide →
How to Use the On Call Plus Glucometer
Always refer to the user manual supplied with your meter. A typical test generally follows this sequence:
- Wash your hands with soap and water.
- Dry your hands thoroughly.
- Verify that you have compatible On Call Plus Test Strips.
- Check the meter and code-chip setup as instructed.
- Remove a test strip from its packaging or container.
- Insert the strip correctly into the meter.
- Prepare the lancing device with a new sterile lancet.
- Obtain the required blood sample.
- Apply the sample to the strip as directed.
- Allow the meter to complete the approximately 10-second measurement.
- Record or review the displayed result as appropriate.
- Dispose of the used strip and lancet safely.
For the complete illustrated procedure and common mistakes, visit:
How to Use On Call Plus Glucometer & Test Strips →
How Much Blood Does On Call Plus Need?
The On Call Plus system requires approximately 1 µL of fresh capillary whole blood for a test.
Trying to perform the test with an insufficient sample can result in an error rather than a usable glucose result.
Do not repeatedly add blood after the meter has progressed through the test unless the instructions for your exact system specifically permit it.
How Long Does On Call Plus Take to Show a Result?
The On Call Plus meter typically displays the glucose result in approximately 10 seconds after an adequate blood sample has been correctly applied to the compatible test strip.
If the expected countdown does not begin, check strip insertion, blood application, meter condition and any error message shown on the screen.
On Call Plus Memory & Average Results
The meter can store up to approximately 300 test records with date and time.
It can also calculate glucose averages over:
- 7 days
- 14 days
- 30 days
Stored readings and averages can help users review previous measurements, but they should not be used by themselves to change medication or treatment without appropriate medical guidance.
On Call Plus Measurement Range: HI and LO
The documented measurement range of the On Call Plus system is approximately 20–600 mg/dL.
A meter may display HI or LO when the measured value is outside its reportable range rather than presenting a numerical result.
A HI or LO message should not be treated simply as an ordinary meter error. Follow the manufacturer instructions for repeating the test and seek appropriate medical advice when results or symptoms warrant urgent assessment.
On Call Plus Error Codes & Troubleshooting
On Call Plus can display error messages relating to meter operation, test-strip handling, sample application, battery condition, temperature, coding or internal electronics.
Customers commonly search for messages such as:
- On Call Plus E0 / E-0 error
- On Call Plus E1 / E-1 error
- On Call Plus E2 / E-2 error
- On Call Plus E3 / E-3 error
- On Call Plus E4 / E-4 error
- On Call Plus E5 / E-5 error
- On Call Plus E6 / E-6 error
- On Call Plus code-chip error
- On Call Plus HI or LO message
- On Call Plus meter not turning on
Do not assume that an error code found online for another glucose meter has the same meaning on On Call Plus.
Use our dedicated model-specific guide:
On Call Plus Error Codes & Troubleshooting Guide →
For broader glucometer problems across multiple brands, see:
Glucometer Setup, Error Codes & Troubleshooting Guide →
On Call Plus Test Strip Expiry
Always check the expiry or use-by information printed on the actual test-strip packaging supplied to you.
Do not rely solely on a website image to determine the expiry of the physical batch you receive, because product batches are replenished over time.
Customers purchasing larger quantities such as 100 or 200 strips should consider whether the quantity is likely to be used within the applicable expiry period.
Read the dedicated guide:
On Call Plus Test Strips Expiry & Storage Guide →
How Should On Call Plus Test Strips Be Stored?
Test strips are diagnostic consumables and should be protected from unsuitable storage conditions.
As a general rule:
- Keep strips in the packaging specified by the manufacturer.
- Close the strip container promptly when using vial-packed strips.
- Protect strips from excessive heat and moisture.
- Do not transfer strips into an unrelated container.
- Keep the test area clean.
- Do not use strips that appear damaged or contaminated.
- Check the printed expiry information before use.
Individually foil-packed strips should remain sealed until required for testing.
On Call Plus vs On Call Extra
On Call Plus and On Call Extra are both ACON blood glucose monitoring systems, but they are not the same meter platform.
| Feature | On Call Plus | On Call Extra |
|---|---|---|
| Compatible strip family | On Call Plus | On Call Extra |
| Approx. blood sample | 1 µL | 0.4 µL |
| Approx. result time | 10 seconds | 4 seconds |
| Coding approach | Code-chip based | No routine manual coding |
| Approx. memory | Up to 300 records | Up to 500 records |
| Re-dosing | Follow Plus-specific instructions | Manufacturer-supported short re-dosing window |
The difference in strip compatibility is particularly important: On Call Plus strips should not be purchased for an On Call Extra meter, and On Call Extra strips should not be purchased for an On Call Plus meter.
Read the complete comparison:
On Call Plus vs On Call Extra Glucometer →
On Call Plus vs On Call GK Dual
The On Call Plus is primarily a blood glucose monitoring system. The On Call GK Dual is a separate platform intended to support both blood glucose and blood β-ketone measurement using its respective compatible strip systems.
On Call Plus Test Strips should therefore not be assumed to work with GK Dual.
Learn more about the dual system here:
On Call GK Dual Glucose & Ketone Monitor Complete Guide →
When Should You Perform a Control Solution Test?
A control solution test is used to check whether the meter and test-strip system are functioning together within the expected control range.
Refer to the On Call Plus user instructions for circumstances in which a control test is recommended. Examples may include checking system performance after questions about strip storage, meter handling or unexpected readings.
Control solution is not blood and should not be interpreted as a personal glucose result.
Why Is My On Call Plus Meter Not Reading the Strip?
Possible causes can include:
- Strip inserted incorrectly
- Incorrect strip family
- Used or damaged strip
- Code-chip problem
- Battery issue
- Meter contact or electronics problem
- Unsuitable operating conditions
If the meter displays an error code, use the exact code shown on the meter when consulting the troubleshooting guide.
Check the On Call Plus Error Code Guide →
Why Is My On Call Plus Result Different from Another Meter?
Two glucose meters should not automatically be expected to produce precisely identical numerical results from separate tests.
Differences can be influenced by factors such as:
- Different blood drops
- Testing time
- Strip technology
- Sample application
- Storage conditions
- Meter and strip operating ranges
Do not diagnose a meter problem solely because two consumer meters show somewhat different values. Follow the manufacturer's quality-control instructions and discuss clinically unexpected results with an appropriate healthcare professional.
Where to Buy On Call Plus Glucometer & Strips
You can view available On Call Plus meters, kits, standard strip packs and selected foil-packed strips in the dedicated Microsidd collection:
Shop On Call Plus Glucometers & Test Strips →
You can also explore the complete brand family:
Shop All On Call Glucometers & Test Strips →
Why Buy On Call Plus from Microsidd?
Microsidd India supplies blood glucose monitoring products to customers, healthcare professionals, clinics and laboratories across India.
When comparing a medical diagnostic product across marketplaces, offline stores and independent online sellers, price should not be the only consideration. Correct model identification, strip compatibility, genuine supply and appropriate product handling are particularly important for diagnostic consumables.
- Established supply of On Call / ACON products
- Multiple On Call Plus meter and strip configurations
- Standard and higher-quantity strip packs
- Selected individually foil-packed strips
- Compatibility-focused product information
- Knowledge Hub support for setup and troubleshooting
- GST invoice available where applicable
- Delivery across India
Customers in Bengaluru can also learn more about Microsidd India in RT Nagar, Bengaluru → .
Frequently Asked Questions About On Call Plus
Which strips are compatible with the On Call Plus glucometer?
Use compatible On Call Plus Blood Glucose Test Strips. Do not substitute On Call Extra or GK Dual strips merely because they share the On Call brand name.
How much blood does On Call Plus require?
The On Call Plus system requires approximately 1 µL of fresh capillary whole blood.
How long does an On Call Plus test take?
A glucose result is typically displayed in approximately 10 seconds after an adequate sample is correctly applied.
How many results does the On Call Plus meter store?
The meter can store up to approximately 300 results with date and time.
Does On Call Plus require coding?
The traditional On Call Plus system uses a code-chip based calibration system. Follow the instructions supplied with your meter and strip pack.
What is the On Call Plus glucose measurement range?
The documented measurement range is approximately 20–600 mg/dL.
What does E1 mean on On Call Plus?
On Call Plus has model-specific error codes. Use the On Call Plus Error Codes & Troubleshooting Guide for the meaning and recommended action for E0, E1, E2, E3, E4, E5, E6 and other meter messages.
Can I use On Call Extra strips in an On Call Plus meter?
No. On Call Plus and On Call Extra are separate strip systems. Use the strip family specified for your exact meter.
Are On Call Plus 50 and 200 strips compatible with the same Plus meter?
Where both products are genuine compatible On Call Plus Test Strips, the pack quantity changes the number of tests supplied rather than the underlying meter family. Always verify the specific product packaging and compatibility before ordering.
Should I buy 50, 100 or 200 strips?
Choose according to your testing frequency, expected usage before expiry and ability to store the strips correctly. A larger pack is useful only when the quantity can be appropriately used and stored.
Where can I buy On Call Plus strips online in India?
Microsidd offers On Call Plus glucometers and compatible test-strip packs online for delivery across India, subject to current availability.
Related On Call Plus Guides
- On Call Plus Test Strip Compatibility Guide
- On Call Plus Error Codes & Troubleshooting Guide
- How to Use On Call Plus Glucometer & Test Strips
- On Call Plus Code Chip & Coding Guide
- On Call Plus Test Strips Expiry & Storage Guide
- On Call Plus Test Strips 50 vs 200 Pack Guide
- On Call Plus vs On Call Extra Glucometer
- Complete On Call Plus, Extra & GK Dual Guide
Medical information notice: This page provides product information, compatibility guidance and general operating information. It does not diagnose diabetes, interpret an individual's glucose result or replace professional medical advice. Follow the instructions supplied with your specific On Call Plus meter and test strips and consult an appropriate healthcare professional regarding glucose targets, testing frequency, medication or treatment decisions.