retrotec 540x DucTester Systems User Guide

: June 12, 2024
: retrotec

Table of Contents

Package Contents
Commercial DucTester Setup
Desired results not achieved?
Field check gauge weekly
Get the results you need
Customers Support
Read User Manual Online (PDF format)
Download This Manual (PDF format)

retrotec 540x DucTester Systems

retrotec 540x DucTester Systems

Package Contents

Commercial DucTester Setup

Prepare the gauge, first time only Home Screen must show Model 540 or 550 on Range 47.

If not, tap the device icon, then
Tap until “Retrotec Duc Tester” appears.
Tap then tap
If units on Channel A and Bare NOT correct
-Tap [Settings] > [Results to be displayed]
-Tap [Pressure:] to change pressure
-Tap [Flow:] or [Flow/Area] to change flow units
-Tap to return Home
If time average is NOT “5 s avg”
-Tap [Settings] > [Time Averaging] “5 seconds”
-Tap to return Home
Prepare the ducts
Ensure sealing is complete
Blank off ductwork
Connect Flex to ducts
Attach 6″ (100mm) Flex to ductwork

Install Range 47 Flow Plug
Connect Flex to Fan
Connect Flex Duct to fan outlet for pressurization

On Model 550 you can depressurize ducts by attaching the Adapter onto Fan inlet and attaching the Flex to it
Connect tubes & controls
Connect yellow and green tubes between Duc Tester and gauge
Plug in Speed Control Cable between DucTester and Gauge

Connect tubes & controls cont’d
Connect blue tube to gauge and to ducts using static probe or connection on flange
Prepare Gauge for the test
Tap [Settings) > > [Default Pressure] and enter Test Pressure. Tap to return Home.
If your flow units include area, tap [Area], then use number pad to enter and tap [Set]
Run the test
WARNING! Test pressures may exceed 20 in WC (5000 Pa). Start slowly’
[Set Speed) to 1% the Jog up to the Test Pressure
Tap “@” on the display and “Flow at Test” Pressure will appear
Jog fan speed up but do not exceed the Pressure Class
Read results from the Gauge

Connect Gauge to a laptop and have Fan Testic run the test according to any Standard,
Visit retrotec.com/software.html to download
Test Passes
Complete test reports
Remove temporary seals

Desired results not achieved?

Flow in [Channel BJ reads”–” or”+ +”attest pressure?

If the test pressure has been reached, but”–” appears, the fan is running too slowly to accurately measure flow (flow pressure below minimum).

Switch to a lower Range Plug

If the test pressure has been reached, but”+ +” appears, the fan is running too quickly to accurately measure flow (flow pressure above maximum). Make sure to:

Change [Range] on DM32 to match
Re-adjust fan speed

Cannot achieve test pressure at full speed?

If fan reaches 100% speed before reaching test pressure

Change to a higher Range Plug and try again.
Change [Range] on the gauge to match.
Check seals on all registers. Look for disconnected ducts or ducts open to outdoors

Field check gauge weekly

Check gauge operation and check for blocked, leaking or pinched tubes weekly, and anytime results are in question. This will eliminate a common source of error

Field check gauge weekly

To perform the gauge check, you will need the gauge and Umbilical

Set [Time Average] to 5 seconds in [Settings].

Tap [Channel B] and select “Pressure: Pa”.

Connect the yellow tube between the red and yellow ports.

Icon If readings on Channel A and Channel B are within 2% and don’t drop rapidly, the tube is not blocked or leaking and the gauge is correct.

Repeat between different ports with each of the tubes you use for testing.

Get the results you need

Tap the [Channel BJ key to select a different Result, or tap the [Result to be displayed] key on the [Settings] menu.

Flow: CFM (m3/h) – Flow at the induced pressure is the simplest result

*Flow/Area: CFM/100 sq ft (m3/(hm2) or m3/(sm2) or liters/(sm2)) –** Flow in CFM per 100 square feet (or m3/(h·m2) may be required. Requires an area to be entered.

When a Result is chosen that requires an area, [Area] will be shown on the Home screen. Tap it to enter the area.

The area can also be changed from the [Settings] menu.

Icon Use smaller Range number for tighter ducts, and larger number for leakier ducts.

Get the results you need