『How to Use Omron Peak Flow Meter: Programming Digital Memory Displays and Daily Average Records』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)
How to Use Omron Peak Flow Meter: Programming Digital Memory Displays and Daily Average Records
Quick Answer: Press and hold the SET button for three seconds to open the programming menu. Use the UP or DOWN button to change values in the clock, date, and memory display. The meter calculates daily averages automatically after two or more readings in the same 24-hour period.
Before You Start the Programming
Most setup mistakes happen because the battery is weak or the button is not held long enough. Check the battery first. A low battery can cause the display to flash and drop saved records. On the Omron PFM20 digital peak flow meter and similar models, the SET button is on the front panel next to the display.
In practice, many users press SET once and expect a menu. That does not work on most Omron digital peak flow meters. You have to hold the button for three full seconds. We have seen this on customer sites many times where a fast press only shows the last reading.
Step 1: Set the Clock and Date
After you hold SET for three seconds, the hour digit flashes. Press UP or DOWN to set the hour. Press SET once to confirm. The minute digit flashes next. Set the minute the same way.
Then the meter asks for the year, month, and day. The order depends on the firmware version. Some units show day first. Some show month first. The key point is to confirm each value with a short press of SET before moving on.
A correct clock matters because the daily average record is tied to the 24-hour clock. If the clock is wrong, the meter can combine readings from two separate days into one average.
Step 2: Programming the Digital Memory Display
The digital memory display on the Omron peak flow meter stores each reading with a time stamp. You can set the memory display to show the most recent reading, the best reading, or the daily average. Press the MODE button to cycle through these display options.
To store a reading, perform a peak flow test. The meter beeps and writes the value into the memory automatically. You do not need to press a save button. The reading is stored with the current time and date.
Most Omron digital units hold up to 240 readings. When the memory is full, the oldest reading is deleted automatically. Some users prefer to clear the memory each month to keep the record clean.
How Daily Average Records Work
The daily average record is not a simple mean of all readings. The meter calculates it from the readings tagged to the same calendar day. If you take three readings on Tuesday morning, the meter averages those three values. The display may show the daily average for five seconds after the third reading.
Here is the thing. The daily average resets at midnight according to the internal clock. If you work a night shift and take readings at 11:00 PM and 1:00 AM, they fall into two separate days. The meter does not blend them.
Engineers who use industrial data loggers know this problem well. A midnight rollover can split a batch record. For respiratory monitoring, this may undercount the daily exposure. Check the clock before relying on daily averages.
Step 3: Reading Stored Records
Press the
To see only the daily average, keep pressing MODE until the AVG symbol appears. The display then shows the average for the current day. If there is no reading yet, the display shows three dashes.
Clearing Memory and Reprogramming
To clear the memory, press and hold MODE and SET at the same time for five seconds. The display flashes CLR. Press SET once to confirm. This deletes all stored readings and daily average records from the device.
Do not clear the memory during a clinical trial or a home monitoring program. You may need the raw data for review. If you keep paper records, write down the daily average before clearing.
Common Setup Mistakes We See on Customer Sites
We often see users set the clock but forget to confirm the date. The daily average then looks normal but groups readings incorrectly. A paint manufacturer in Southeast Asia had this problem with an industrial flow meter data logger. The principle is the same for any digital recorder.
Another mistake is pressing MODE too quickly during the programming sequence. Wait for the display to stop flashing before you press the next button. If you press too early, the meter may skip a field.
Industrial Flow Meter Data Logging from Silver Instruments
If you work with industrial flow meters for gas, water, chemicals, or oil, you often need the same kind of digital memory and daily average records. Silver Instruments supplies Coriolis mass flow meters, electromagnetic flow meters, ultrasonic flow meters, and paperless recorders for process data logging.
Send us your pressure in bar, temperature in Celsius, pipe size in DN, and flow range. We can recommend a flow meter with 4-20 mA HART output and built-in daily totalizer memory. Contact Silver Automation Instruments at Tel: +86-25-68650347, WhatsApp: +86-25-52155837, or WeChat: +86 15365082610.
FAQ
Q: Does the Omron peak flow meter store readings for multiple users?
A: No. The standard digital memory is designed for one user profile. If two people use the same device, the daily average will mix their readings.
Q: How many readings can the digital memory hold?
A: Many Omron digital peak flow meters hold up to 240 readings. The exact number depends on the model and firmware version.
Q: What time does the daily average reset?
A: The daily average resets at midnight according to the internal clock. Check that the clock is set correctly for your local time zone.
Q: Can I use an Omron peak flow meter for industrial gas flow measurement?
A: No. The Omron units are designed for respiratory peak flow monitoring. For industrial gas flow, you need a thermal mass flow meter or a Coriolis mass flow meter from Silver Instruments.
Q: Why does the display show three dashes when I press AVG?
A: This means there are no readings for the current day. The meter needs at least one reading tagged to that calendar day before it can calculate a daily average.
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