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Flomec Flow Meter Battery Replacement Guide: Swapping Batteries Without Losing Calibration Data
Quick Answer: On most Flomec electronic flow meters, calibration data sits in non-volatile memory. A battery swap should not erase K-factor or 4-20 mA settings. Record the totalizer and configuration values first because some older models store totals in battery-backed RAM.
This guide covers Flomec battery replacement in industrial service. The guide includes steps, battery types, and the mistakes that cost time on site. Silver Automation Instruments supports flow meter users in Southeast Asia, Oceania, Latin America, Africa, and the Middle East.
How Calibration Data Is Stored in Flomec Flow Meters
Most Flomec electronic flow meters hold calibration data in non-volatile memory. The K-factor, pulse output settings, and 4-20 mA span stay unchanged after power loss. Some older Flomec models use battery-backed RAM for the totalizer only. The flow reading returns after battery installation, but the running total may reset to zero.
Write down these values before you open the meter: K-factor, flow range, pipe size such as DN15 or DN50, totalizer value, process temperature, and output type. So you have a written record for the totalizer later. A paint factory in Vietnam once lost the totalized batch volume during a battery swap because nobody recorded the total before removing the old cell. The calibration curve was still intact.
Flomec Battery Replacement Procedure That Protects Calibration Data
Follow these steps for a clean battery swap. First, isolate the meter from loop power. On pulse output units, remove the signal connection if the circuit is still live. On 4-20 mA HART units, take the loop offline before opening the housing. Use ESD protection. A dry and clean work area helps avoid board damage.
Next, open the electronics cover slowly. Some Flomec housings have a small set screw that must be loosened first. Do not open the housing in heavy rain or process steam. Moisture inside the enclosure will cause more damage than a flat battery.
Third, remove the old battery and check the voltage. Many Flomec battery powered flow meters use a 3.6 V lithium D cell. Capacity is usually 19 Ah. If your old cell measures below 3.0 V under load, replacement is overdue. Install the new cell with correct polarity. Do not touch the cell terminals with bare metal tools across both contacts.
Fourth, close the housing and tighten the set screw. Power up the loop and check the display. The K-factor and output settings should match your service sheet. If the display shows zero flow with no process fluid moving, check the low flow cutoff setting before calling for service.
Battery Type and Hazardous Area Requirements
Voltage and capacity matter. A 3.0 V lithium cell often drops below the meter brownout threshold early and causes unstable pulse output. A water utility in Indonesia used a 3.0 V cell from a local shop. The meter lost pulse output every two weeks until the correct 3.6 V 19 Ah cell was installed.
For ATEX Zone 1 or Class I Div 1 locations, use only approved battery kits. The battery connector, cell manufacturer, and sealing method are part of the certification. A cheap lookalike battery creates a safety risk and can void the meter c
Mistakes That Cause Calibration or Totalizer Loss
One common mistake is keeping loop power on during a battery swap. That can short terminals and reset the electronic board. Another mistake is waiting too long between removing the old cell and installing the new one. Some older Flomec designs hold totals in RAM for about 60 seconds. Open the new battery package before you remove the old cell.
Using a metal screwdriver to pry out the cell is risky. A screwdriver can scratch the board or bridge live terminals. Use a plastic spudger. Do not reseal the housing with old gaskets. A failed gasket lets water in and destroys the board within weeks. We have seen this on customer sites in coastal Colombia and Nigeria.
Silver Automation Instruments Support for Flomec Flow Meter Users
Silver Automation Instruments supplies battery kits, replacement flow meters, and calibration support. We stock Coriolis mass flow meters, electromagnetic flow meters, ultrasonic flow meters, oval gear flow meters, turbine and vortex flow meters, pressure transmitters, and paperless recorders. If your Flomec meter needs a battery, send us the model code and serial number.
For a quote, send us your meter model, battery voltage, pipe size in DN, flow range in kg/h or L/min, and whether the site has hazardous area classification. Our service team responds with battery kit options and calibration support. Contact us at:
Tel: +86-25-68650347
WhatsApp: +86-25-52155837
WeChat: +86 15365082610
We ship to Vietnam, Thailand, Indonesia, Australia, Mexico, Brazil, Saudi Arabia, South Africa, and other industrial markets. Ask for a packed battery kit with the correct connector for your Flomec model. Visit flow-meter.com.au for the full flow meter range.
FAQ: Flomec Flow Meter Battery Replacement Without Losing Calibration Data
1. Will a Flomec flow meter lose calibration data after battery replacement?
No. On most Flomec electronic flow meters, calibration data is stored in non-volatile memory. K-factor and output settings stay safe. The totalizer may reset on some older models if the battery is out too long.
2. What battery fits a Flomec flow meter?
Many Flomec battery powered flow meters use a 3.6 V lithium D cell with 19 Ah capacity. Some compact models use C size lithium cells. Check the marking on the existing cell before ordering.
3. How often should the battery be replaced?
Typical battery life is 3 to 5 years at 20 °C. High pulse output frequency, cold process products, and backlight use shorten battery life. Measure the cell voltage during annual maintenance.
4. Can I use a standard 3.6 V battery from an electronics shop?
Avoid that. Many generic cells do not have the right connector, capacity, or hazardous area approval. Use a battery kit made for the meter model and site classification.
5. What should I do if the display resets after battery installation?
Check the battery polarity and voltage first. If the display still resets, send us the meter model, serial number, and a photo of the battery connector. We can help with service options or a replacement meter.