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What kinds of batteries and cells can be measured utilizing conductance?See Answer
Typically any 2-Volt to 16-volt, lead-acid, 5 to 6000 Ampere-hour cells can be tested.
Can a Midtronics conductance measurement be made while the battery is online?See Answer
Yes. The current test technology enables successful testing of batteries while on float charge. In certain cases, an excessive amount of AC ripple current can interfere with any test method. If this is the case, consult with Midtronics as certain products were specifically designed for these noisy systems.
How does the conductance relate to the capacity of a battery?See Answer
60% loss of conductance equates to 20% loss of capacity.
Can I convert impedance or resistance measurements to conductance reference numbers?See Answer
No, they cannot be directly calculated to each other. Midtronics testers measure the conductance as an AC function. Impedance meters use a pulsed load and calculate the resistance based on the step change in the current when the load is pulsed. Conductance is also an AC test. However, conductance testers look at the “real” part of the complex admittance, called conductance or sometimes acceptance. These techniques are interrelated, but they are not identical. Additionally, different manufacturers take measurements using different frequencies.
How many batteries need to fail the Midtronics test for me to consider replacing the whole string?See Answer
Like the answer to most battery questions, it depends. Considerations for load requirements (run time), capacity margins, battery age, battery sizing, temperature, availability of the same battery model, and criticality of the loads all can play a role in your decision making on battery replacement strategies. For example, let’s consider a hypothetical system comprised of forty VRLA batteries with a design life of ten years and a service life of five years in a UPS cabinet. If the batteries are only one year old and four are bad then replacing just the four bad units would be appropriate. But if they were 3-4 years old, then strong consideration should be given to replacing the whole string. The later the batteries are into their service life the more one should plan on replacing the entire string of batteries rather than a few cells/units, because typically as they get later in life they will all eventually start to decline in capacity. Mixing older cells/units with new is generally not a good practice when the age spread is significant, particularly if the cells/units are far along in their expected service life period.
Is Midtronics on social media?See Answer
Yes. We are on Twitter, Facebook, and LinkedIn. You should check us out at the links at the bottom of this webpage!
Does Midtronics trade in testers from other brands?See Answer
Yes. Please contact your regional sales manager for a quote by clicking the REQUEST QUOTE button above.
Does Midtronics offer on-site training?See Answer
Yes. Please contact our Field Service department at firstname.lastname@example.org.
How large are Midtronics conductance testers?See Answer
All Midtronics conductance testers are hand-held portable instruments. They are built to very rugged standards, yet weigh less than 3 pounds (1 kilogram) each. The testers are easily transportable and each includes some form of protective carrying case.
What is the optimal point of contact when making a conductance measurement?See Answer
Making direct contact with the lead post will usually provide the most consistent and accurate test result. In order to facilitate this contact (which can be difficult depending on the battery post design), Midtronics offers a variety of battery test interfaces, including clamps and contact probes of differing sizes. Contact with stainless steel post hardware will skew test results. However, if the only access point is stainless steel, it is OK to test there. It may be helpful for the user to experiment with different battery post design to identify which test contact location provides the best conductance result.
What if I cannot test my batteries directly at the post because of physical constraints?See Answer
If battery and/or cabinet construction makes testing at the post difficult, test on the lead strap/inter-cell connector as close to the post as possible. Ensure you are consistent with every test. If you must test on the strap/inter-cell connector, test in the same spot for every cell, every time. If you are inconsistent with your probe or clamp placement, your reading will be inconsistent as well.
Does battery temperature affect conductance measurement?See Answer
High temperatures make the conductance test result increase and cold temperatures have the opposite effect. However, Midtronics testers have a built-in temperature-compensated algorithm to prevent an error due to temperature. Most battery performance data is calculated at an optimal battery operating temperature of 77° Fahrenheit (25° Celsius). An infrared temperature sensor is a standard component with the complete Celltron test kit to accurately determine battery temperature and is also available from Midtronics as an accessory. Please view the video for a more detailed look at how to take a temperature measurement using the Celltron Advantage battery analyzer.
I have batteries in my generator and vehicles that are rated in CCA. Which tester should I use?See Answer
The best tester to use is the Celltron Advantage. These batteries are commonly used in automotive applications. Midtronics is the standard in automotive dealerships and battery retailers throughout the world.
Can I test an entire 24, 36, 48, 120, 220/240, or 600-Volt system?See Answer
No. The Celltron is designed to test batteries/cells for lead acid batteries with anywhere from 1 to 8 cells. That is a nominal 2-Volts up to a nominal 16-Volts. The Celltron SCP 6/12 will test either 6-Volt or 12-Volt batteries only. Midtronics testers will test any battery as long as the system can be tested at the 16-Volt level or less. The system voltage is not as relevant as is the lowest battery terminal voltage that can be safely accessed. Some cabinet/battery designs limit or restrict access to the individual batteries. Midtronics recommends testing the smallest battery segment possible.
Can the data collected by the CELLTRON be manipulated by PC?See Answer
Yes. Midtronics offers a software program to facilitate the downloading and manipulation of data collected with the Celltron. Data is presented in a graphical format and can be utilized for trend analysis as well as historical archiving. An infrared strip printer is also available for on-site printing and record keeping.