How to Calibrate Your Semi-Automated AT500 Seed Treater Pump Stands (V1 vs V2 vs V3)
How to Calibrate Your Semi-Automated AT500 Seed Treater Pump Stands
V1, V2 & V3 Pump Stand Differences Explained
If you’re running a semi-automated AT500 seed treater, calibration depends on which pump stand version you have.
From roughly 2017 to today, Unified Ag Solutions has released three pump stand interfaces:
V1 (2017–2020) – ShurFlo diaphragm pumps
V2 (2020–2025) – Peristaltic (roller) pumps
V3 (2025–Present) – Peristaltic pumps with built-in flow calculations
While the hardware and interface evolved, the goal of seed treater pump calibration has not changed: You are calibrating the pump flow rate to match your target seed treatment application rate.
Here’s what’s different between versions — and how to calibrate each correctly.
V1 Pump Stands (2018–2020)
ShurFlo Diaphragm Pumps
V1 semi-automated AT500 systems used ShurFlo diaphragm pumps, often recognized by the large orange valve.
How a ShurFlo Diaphragm Pump Works
A diaphragm pump moves product using a flexible membrane that expands and contracts.
The diaphragm pulls liquid into the chamber
Then pushes it out through a one-way valve
This repeated motion creates fluid movement
Because the diaphragm flexes mechanically, flow output can vary depending on:
Product thickness
Internal wear
Temperature
This makes proper pump calibration especially important before treating season.
V1 Calibration Process
Run pump output into a calibrated container for 60 seconds.
Check the run total displayed on the interface.
Measure the actual ounces collected.
Manually adjust the screen total to match actual volume.
Apply the new calibration factor.
Repeat to confirm accuracy.
With V1 systems, more math is done externally. Operators often relied on the UAS app to calculate proper flow rates.
V2 Pump Stands (2020–2025)
Peristaltic (Roller) Pumps
In 2020, UAS upgraded to peristaltic pumps, also known as roller pumps.
How a Peristaltic Pump Works
A peristaltic pump moves product by rotating rollers that compress flexible tubing.
Rollers squeeze the tube
Product is pushed forward
No liquid touches internal pump components
Benefits include:
More consistent flow
Improved accuracy
Easier maintenance
Better handling of thicker seed treatment products
The hardware improved — but calibration is still required.
V2 Calibration Process
The calibration function works essentially the same as V1:
Catch output for 60 seconds.
Check run total on screen.
Measure actual ounces collected.
Adjust screen total to match actual output.
Apply new calibration factor.
Double-check.
You are still calibrating the pump flowmeters to match real-world product output. For flow rate calculations in V2 systems, operators commonly use the UAS app.
Inside the app, input:
Seed size
Net weight
Time (seconds)
Use rate (oz per cwt)
The app calculates:
Adjusted use rate
Run total
Required flow rate (oz per minute)
This ensures your semi-automated AT500 is applying the correct seed treatment rate per minute.
V3 Pump Stands (2025–Present)
Peristaltic Pumps with Integrated Flow Calculations
V3 pump stands still use peristaltic pump technology, but the interface has changed significantly.
The biggest upgrade:
Flow rate calculations are now built directly into the touchscreen readout.
Instead of relying on the UAS mobile app, operators can input their values directly on the integrated touchscreen. You can:
Enter seed size
Enter application rate
View calculated oz/min directly on screen
Apply calibration adjustments within the interface
This reduces calculation errors and streamlines semi-automated seed treater calibration.
V3 Calibration Process
The physical calibration process remains consistent:
Catch product for 60 seconds.
Compare measured output to screen total.
Enter actual collected volume.
Apply suggested calibration adjustment.
Confirm with a second test.
The difference is that flow rate math is now integrated into the system instead of being done externally.
What Hasn’t Changed Across V1, V2 & V3
No matter which semi-automated AT500 you’re running:
You must measure actual product output.
You must adjust calibration factors accordingly.
You must double-check before full-scale treating.
Even with improved hardware and software, calibration is still compensating for:
Product viscosity
Pump wear
Environmental conditions
Skipping calibration risks:
Under-application
Over-application
Product waste
Inconsistent seed coverage
If you need help identifying your pump stand version or reviewing your flow rate calculations before planting season, Unified Ag Solutions can help you get dialed in.