# On Call Plus Test Strip Compatibility Guide: Which Strips Work with Your Meter? **By Dr Pramod kumar** · 2026-09-24 If you own an **On Call Plus glucometer**, the most important thing when buying replacement strips is to choose the correct **On Call Plus Test Strip family**. The words **On Call** alone are not enough to confirm compatibility. ACON produces several different On Call systems, including **On Call Plus, On Call Extra and On Call GK Dual**, and these systems should not be assumed to use the same strips. This guide explains which strips are compatible with the On Call Plus meter, how pack size affects compatibility, how the code-chip system works and which On Call strips should not be used with an On Call Plus meter. For complete information about the meter itself, read our [**On Call Plus Glucometer & Test Strips Complete Guide**](/blogs/knowledge-hub/on-call-plus-glucometer-test-strips-complete-guide) . * * * ## Which Test Strips Are Compatible with On Call Plus? The basic compatibility rule is: **On Call Plus meter → On Call Plus Blood Glucose Test Strips** When buying strips, check that the product packaging specifically identifies the strips as being intended for the **On Call Plus** system. The pack quantity may vary, but the meter family must remain correct. * * * ## On Call Plus Compatibility at a Glance Test Strip On Call Plus Compatible? Notes On Call Plus Test Strips 50 **Yes** Standard replacement pack On Call Plus Test Strips 100 **Yes** Larger quantity of compatible Plus strips On Call Plus Test Strips 200 Hospital Pack **Yes** Higher-volume compatible Plus pack On Call Plus Foil-Packed Test Strips **Yes, where labelled for On Call Plus** Individually packaged Plus-compatible format On Call Extra Test Strips **No** Designed for the On Call Extra system On Call Blood Ketone Test Strips **No** Designed for compatible ketone-testing systems such as GK Dual On Call Chosen / Advanced strips **Do not assume compatibility** Separate On Call strip families * * * ## Does Pack Size Change Compatibility? **No, pack quantity by itself does not determine compatibility.** For example, Microsidd currently offers On Call Plus strip quantities such as **50, 100 and 200 strips**. These different quantities are intended for customers with different testing frequencies. What matters is that the strips are identified as **On Call Plus Test Strips**. ### 50-strip pack [**On Call Plus Test Strips 50 →**](/products/oncall-plus-glucometer-strips-50) A practical standard pack for many regular users. ### 100-strip pack [**On Call Plus Test Strips 100 →**](/products/oncall-plus-glucometer-strips-100) A larger quantity for customers with more frequent testing requirements. ### 200-strip hospital pack [**On Call Plus Test Strips 200 Hospital Pack →**](/products/oncall-plus-glucometer-strips-hospital-pack) A higher-volume option for appropriate regular or professional requirements. For help choosing quantity, read: [**On Call Plus Test Strips 50 vs 200 Pack Guide →**](/blogs/knowledge-hub/on-call-plus-strips-50-vs-200) * * * ## Are On Call Plus Foil-Packed Strips Compatible? Microsidd also carries selected **individually foil-packed On Call Plus Test Strips**. These should be considered compatible only when the packaging specifically states that they are intended for the **On Call Plus** system. - [**On Call Plus Foil-Packed Test Strips 50**](/products/oncall-plus-50-glucometer-strips-foil-pack) - [**On Call Plus Foil-Packed Test Strips 100**](/products/oncall-plus-100-glucometer-strips-foil-pack) The packaging format may differ from vial-packed products, but **compatibility should always be verified from the actual product label and meter model**. * * * ## Can On Call Extra Strips Be Used in On Call Plus? **No.** On Call Extra Test Strips are designed for the **On Call Extra** blood glucose monitoring system. They should not be purchased for an On Call Plus meter simply because both products carry the On Call brand. The two systems also differ in other ways, including sample size, test time, coding method and meter memory. Read: [**On Call Plus vs On Call Extra: Complete Comparison →**](/blogs/knowledge-hub/on-call-plus-vs-on-call-extra-glucometer) * * * ## Can On Call Plus Strips Be Used in On Call Extra? **No.** If your meter says **On Call Extra**, you should purchase compatible On Call Extra Test Strips. Visit: [**On Call Extra Glucometers & Test Strips →**](/collections/on-call-extra-glucometer-strips) Or read: [**On Call Extra Test Strip Compatibility Guide →**](/blogs/knowledge-hub/on-call-extra-test-strips-compatibility-guide) * * * ## Can On Call Plus Strips Be Used in On Call GK Dual? Do not assume that On Call Plus strips are compatible with **On Call GK Dual**. GK Dual is a separate On Call system designed to support both **blood glucose and blood β-ketone testing** using its applicable compatible strip systems. For GK Dual glucose testing, use the strip family specified for the GK Dual system rather than substituting On Call Plus strips. For ketone testing, GK Dual uses compatible **On Call Blood Ketone Test Strips**. Read: [**On Call GK Dual Strip Compatibility Guide →**](/blogs/knowledge-hub/on-call-gk-dual-strip-compatibility-guide) * * * ## How to Identify Your On Call Meter Model If you are not sure which strips to buy, inspect the actual meter before ordering. Look for the model name printed on the front, back or label of the device. - If it says **On Call Plus** → buy On Call Plus strips. - If it says **On Call Extra** → buy On Call Extra strips. - If it says **On Call GK Dual** → use the strip system specified for GK Dual glucose or ketone testing. Do not rely only on: - the colour of the meter, - the appearance of the strip, - an old invoice, - a previous order, or - the general On Call brand name. The exact model name is the safest starting point. * * * ## Why On Call Plus Uses a Code Chip The traditional On Call Plus platform uses a **code-chip based calibration system**. The code chip supplied for the applicable strips helps configure the meter for the correct test-strip calibration. When changing strip supplies, follow the instructions supplied with the strip pack rather than assuming that the previous code-chip setup can always be used. For detailed coding guidance: [**On Call Plus Code Chip & Coding Guide →**](/blogs/knowledge-hub/on-call-plus-code-chip-coding-guide) * * * ## Does the Code Chip Determine Strip Compatibility? The code chip is part of the On Call Plus calibration process, but **a code chip does not make an incompatible strip compatible**. Always begin with the correct strip family: **On Call Plus meter + On Call Plus Test Strips** Then follow the code-chip instructions applicable to that strip supply. * * * ## What Happens If the Wrong Strip Is Inserted? An incompatible test strip may: - not be recognised by the meter, - fail to start the testing process, - trigger an error message, or - be physically unsuitable for the meter's strip port or calibration system. Do not attempt to force an incompatible strip into the meter. If your On Call Plus meter does not recognise a strip, see: [**On Call Plus Error Codes & Troubleshooting Guide →**](/blogs/knowledge-hub/on-call-plus-error-codes-troubleshooting-guide) * * * ## My On Call Plus Meter Is Not Reading the Strip If the strip should be compatible but the meter still does not recognise it, check: 1. **Model:** confirm that the meter really is On Call Plus. 2. **Strip:** confirm the strip packaging says On Call Plus. 3. **Orientation:** insert the strip in the correct direction. 4. **Insertion:** make sure the strip is fully inserted. 5. **Condition:** use a new, undamaged strip. 6. **Expiry:** check the printed use-by information. 7. **Storage:** check that strips were stored correctly. 8. **Code chip:** verify the correct code-chip setup. 9. **Battery:** check that the meter has adequate battery power. If the meter displays an E-code or CODE message, use the exact message to troubleshoot further. * * * ## Can Older On Call Plus Meters Use Current Plus Strips? Compatibility should be confirmed from the **actual current strip packaging and the meter instructions**, especially when using an older meter generation. Do not assume compatibility solely because an old meter and a new strip pack both contain the words On Call Plus. Where there is any uncertainty, compare: - meter model, - strip model/reference information, - manufacturer compatibility instructions, and - code-chip requirements. * * * ## Compatibility vs Pack Size vs Expiry These are three different questions: Question What It Means Compatibility Will this strip work with my exact meter model? Pack size How many test strips are supplied? Expiry How long can the supplied batch be used according to its packaging? A 200-strip pack may be compatible with your meter but still be a poor purchase if you cannot use the quantity appropriately before the applicable expiry period. For expiry and storage information: [**On Call Plus Test Strips Expiry & Storage Guide →**](/blogs/knowledge-hub/on-call-plus-test-strips-expiry-storage-guide) * * * ## Which On Call Plus Pack Should You Buy? The appropriate quantity depends largely on testing frequency and expected consumption. ### 50 strips Suitable for customers who want a standard replacement quantity. ### 100 strips Useful for customers who test more frequently and expect to use the larger quantity appropriately. ### 200 strips Suitable for higher-volume requirements where proper storage and expiry management can be maintained. Compare pack options here: [**On Call Plus 50 vs 200 Test Strips Guide →**](/blogs/knowledge-hub/on-call-plus-strips-50-vs-200) * * * ## Standard Pack vs Foil-Packed On Call Plus Strips On Call Plus strips may be available in different packaging formats. A standard vial or container pack groups multiple strips together, while individually foil-packed strips keep each strip separately sealed until use. The packaging format can affect storage convenience, but it does not replace the need to verify model compatibility. In either case, confirm that the product specifically states **On Call Plus**. * * * ## How to Avoid Ordering the Wrong On Call Strips 1. Pick up your current meter. 2. Read the exact model name. 3. Check the strip product name before ordering. 4. Match **Plus with Plus**. 5. Do not rely only on brand name or packaging colour. 6. Check pack size. 7. Check current batch expiry information where available. If you recently replaced your meter, make sure you are not automatically reordering strips for your old model. * * * ## How to Use Compatible On Call Plus Test Strips Once compatibility is confirmed, correct testing technique is equally important. The general sequence involves: 1. checking the meter and code-chip setup, 2. inserting a fresh compatible strip, 3. waiting until the meter is ready for the sample, 4. obtaining an adequate blood drop, 5. applying approximately 1 µL of blood correctly, and 6. waiting for the approximately 10-second test to complete. Read the detailed guide: [**How to Use On Call Plus Glucometer & Test Strips →**](/blogs/knowledge-hub/how-to-use-on-call-plus-glucometer-test-strips) * * * ## On Call Plus Strip Compatibility & Error Codes Some apparent compatibility problems are actually strip-handling or coding problems. For example: - **E-2** can appear when a strip is removed during testing. - **E-4** can indicate a used or contaminated strip. - **E-5** can indicate insufficient sample. - **CODE** can relate to the code-chip setup. - **E-9** can relate to an incorrect code chip. See: [**On Call Plus E0–E6 Error Codes & Troubleshooting →**](/blogs/knowledge-hub/on-call-plus-error-codes-troubleshooting-guide) * * * ## Shop Compatible On Call Plus Test Strips - [**On Call Plus Test Strips 50**](/products/oncall-plus-glucometer-strips-50) - [**On Call Plus Test Strips 100**](/products/oncall-plus-glucometer-strips-100) - [**On Call Plus Test Strips 200 Hospital Pack**](/products/oncall-plus-glucometer-strips-hospital-pack) - [**On Call Plus Foil-Packed Test Strips 50**](/products/oncall-plus-50-glucometer-strips-foil-pack) - [**On Call Plus Foil-Packed Test Strips 100**](/products/oncall-plus-100-glucometer-strips-foil-pack) View all Plus products: [**Shop On Call Plus Glucometers & Test Strips →**](/collections/on-call-plus-glucometer-strips) * * * ## Frequently Asked Questions ### Which strips fit an On Call Plus glucometer? Use compatible **On Call Plus Blood Glucose Test Strips**. Check that the strip packaging specifically identifies compatibility with the On Call Plus system. ### Can I use On Call Extra strips in On Call Plus? No. On Call Extra strips are intended for the On Call Extra system and should not be used as replacements for On Call Plus strips. ### Can I use On Call Plus strips in On Call Extra? No. On Call Plus and On Call Extra are separate meter-and-strip systems. ### Are 50, 100 and 200 On Call Plus strips compatible with the same meter? Where each product is genuinely labelled as compatible **On Call Plus Test Strips**, the difference is primarily pack quantity rather than meter family. Always confirm the specific packaging before use. ### Are foil-packed On Call Plus strips compatible? Yes, where the foil-packed product is specifically identified by the manufacturer or supplier as being intended for the On Call Plus system. ### Do On Call Plus strips require a code chip? The traditional On Call Plus system uses a code-chip based setup. Follow the coding instructions supplied with the applicable strip pack. ### Can I use On Call Plus strips with GK Dual? Do not assume compatibility. GK Dual is a separate glucose-and-ketone platform with its own specified compatible strip systems. ### Why does my meter not recognise a new strip? Check strip compatibility, orientation, insertion, expiry, storage, battery condition and the code-chip setup. If an error code is displayed, follow the model-specific troubleshooting instructions. ### How do I know if my meter is On Call Plus? Check the model name printed directly on the meter, its label, original packaging or user manual. The device should specifically identify itself as On Call Plus. ### Should I buy 50 or 200 strips? Choose based on your expected testing frequency, ability to store the strips correctly and expected use within the applicable expiry period. * * * ## Related On Call Plus Guides - [On Call Plus Glucometer & Test Strips Complete Guide](/blogs/knowledge-hub/on-call-plus-glucometer-test-strips-complete-guide) - [On Call Plus Error Codes & Troubleshooting Guide](/blogs/knowledge-hub/on-call-plus-error-codes-troubleshooting-guide) - [How to Use On Call Plus Glucometer & Test Strips](/blogs/knowledge-hub/how-to-use-on-call-plus-glucometer-test-strips) - [On Call Plus Code Chip & Coding Guide](/blogs/knowledge-hub/on-call-plus-code-chip-coding-guide) - [On Call Plus Test Strips Expiry & Storage Guide](/blogs/knowledge-hub/on-call-plus-test-strips-expiry-storage-guide) - [On Call Plus Test Strips 50 vs 200](/blogs/knowledge-hub/on-call-plus-strips-50-vs-200) - [On Call Plus vs On Call Extra Glucometer](/blogs/knowledge-hub/on-call-plus-vs-on-call-extra-glucometer) - [On Call Plus, Extra & GK Dual Complete Guide](/blogs/knowledge-hub/on-call-glucometers-test-strips-complete-guide) * * * **Medical information notice:** This guide is intended to explain product compatibility and general use of On Call Plus test strips. It does not interpret individual glucose results, diagnose diabetes or replace the instructions supplied with the meter and strips. Always follow the manufacturer instructions for your exact meter and strip product, and consult an appropriate healthcare professional regarding glucose targets, testing frequency, medication or treatment decisions. **Tags:** Fix On Call Plus errors E0, On Call Plus Error Codes & Troubleshooting Guide, On Call Plus Error Codes E0–E6 & Troubleshooting Guide, On Call Plus warranty claim, On-Call Glucometers & Strips Complete Guide, on-call plus error codes, On-Call plus Glucometer, On-Call Plus Glucometer Strips, On-call Plus Glucucometer and strips complete guide, On-Call Plus Trouble Shooting Guide --- > Source: [Microsidd India](https://microsidd.com/blogs/knowledge-hub/on-call-plus-test-strips-compatibility-guide)