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DM32
Retrotec DM32 User Manual
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© Retrotec
201
7
Tip: Box pressure of 8 Pa
or less
is
recommended b
ecause higher pressure
s will decrease the exhau
st fan flow rate.
Box pressures below 3 Pa ar
e less accurate because
small fluctuations in p
ressure will affect the flow a lot.
One Pa is a
practical limit for mea
suring flow, below which readin
gs cannot be taken.
Try t
he same fan with different holes to see
the different results.
87
89
Table of Contents
Default Chapter
4
Table of Contents
4
Important Equipment-Related Safeguards
8
1 Introducing the Retrotec DM32 Series of Digital Gauge
9
2 Gauge Overview
10
Make Connections to the Gauge
10
Charge the Battery in the Gauge
11
Power the Gauge on and off - Press for 2 Seconds
12
Read Results and Control the Gauge from the Home Screen
12
Observe Icons on Top Bar to Monitor Gauge Status
13
What Speed Is Being Sent to the Fan on the "Fan Speed" Output
14
Over What Time Period Is the Result Being Averaged
14
Result Display Can be Frozen to Write down Values
14
Is the Gauge Connected to a Network
14
How Much Battery Life Is Left in the Gauge
14
Use Keys on the Home Screen to Control Gauge Operation
16
Channel A] Pressure Reading
16
Channel B] Pressure Reading or Result
16
Set the [Range/Device] Connected to the Gauge
17
Estimate Results with [@ Pressure]
19
Setting "N Value" for @Pressure Extrapolation
19
Capture and Apply a Baseline Using [Settings]
20
Gauge Compensates for Sensor Drift with Auto Zero
20
3 Get Results Directly from the Gauge
21
Connect Speed Control Cable between the Gauge and Fan
21
Connect Pressure Tubes to Gauge
21
Control the Test and Read Results on the Home Screen
21
Tap [Range/Device] to Match Range on Device in Use
21
Tap [Range/Device] [Change Device] to Change Device in Use
21
Tap [Set Speed] to Run the Fan at a Particular Speed
22
Tap [Jog] Keys to Adjust Speed up or down 5
22
Tap [Set Pressure] to Achieve a Particular Enclosure Pressure
23
Tap [Jog] Keys to Adjust Pressure up or down 5 Pa
23
Tap [Area] or [Volume] to Enter Dimension for Particular Results
24
Tap [Channel A] to "Hold" Readings and Results
25
Tap [Channel B] or [Settings] to Change Result or Units to be Displayed
26
Retrotec
26
Tap [@ Pressure] to Estimate Result at a Different Pressure
27
4 Change [Settings] for Gauge Operating Parameters
32
Capture [Baseline] Pressure
32
Set [Area] if Using a Result Per Area
33
Set [Volume] if Using ACH
34
Use Metric Units for Dimensions
35
Set the [Default @ Pressure]
36
Set [Time Averaging] Period
38
Change Result and Units to be Displayed
39
Set up "Network" if Using Ethernet Connection
41
View and Update the [Firmware] Version, Check Serial Number
42
Re-Calibrate the Touchscreen
42
Reset Button
43
5 Remotely Run Tests and Save Results with Retrotec Software
44
Connecting Gauges to a Computer
44
Connect Single Gauge to a Computer with Ethernet Cable
44
Connect Multiple Gauges to a Computer Via "Wired" Network
46
Connect Computer or Phone to the DM32 "Wifi" Hotspot
48
Make the DM32 Join an Existing "Wifi" Network
50
Set Secure Wireless Credentials Using DM32 Configurator Software
51
On DM32, Verify Wireless Credentials after Updating
51
6 Update Gauge with New Features
53
Connect the Gauge to a Computer Via USB
53
7 Verify Your Gauge Accuracy between Factory Calibrations
55
8 What to Do if You Have Trouble with the Gauge
58
Re-Calibrate Touchscreen if Keys Don't Respond Well to Taps
58
Gauge May Get Stuck Running "Re-Calibrate Touchscreen" if the Battery Gets into a Low State
59
Reset if You Need to Clear the Gauge to Base Settings
59
Flashing Screen May Appear as Gauge Recovers from Deep Discharge
59
Pressing Power Button May Not Turn Gauge on if Battery Is Fully Discharged
59
Gauge will Not Reset (Run Splash Screen) While Gauge Is Plugged into Power
59
Flashing Yellow LED on Front Means Gauge Had an Internal Malfunction
59
Calculated Result will be Wrong if the Range and Device Installed on Fan Are Different than those Selected on the Gauge
60
Moving Tubes Might Cause Fluctuating Pressure Readings
60
Retrotec
60
Fans with a Single Tube Have Results Adjusted by Gauge
61
Pressure Can Overshoot When Using the Set Pressure Key
61
Check if Large Fixed Errors Are Caused by Pinched Tubes
62
Check if Large Fixed Errors Are Caused by Water in the Tube
63
Check if Large Fixed Errors Are Caused by Sun Heating the Tubes
63
Check if Wind Is Causing Fluctuating Pressure
63
Use the [@ Pressure] Key to Reduce the Effects of Wind
64
Use Time Averaging Feature to Reduce the Effects of Wind
64
Let Time Averaging Take Effect before Making Readings
64
Use Baseline Feature to Reduce the Effects of a Constant Wind
64
In Extreme Cases You Can Use a Wind Damping Kit Designed to Reduce Wind-Related Fluctuations
65
9 Technical Specifications
67
Calibration Interval
67
Appendix A: Understanding Pressures on the Gauge
68
Differential Pressure
68
Positive Vs. Negative Pressure
68
Why Static and Fluctuating Pressures Occur, Causing Bias
69
Managing Fluctuating Pressures Created by Wind
69
Reduce Uncertainty in Results by Taking Lots of Readings
70
Appendix B: Flow Equations Used with Devices
71
Appendix C: Manually Estimate Flow if Required Test Pressure Cannot be Reached
76
Cannot Reach 50 Pa Factors
77
Cannot Reach 25 Pa Factors
78
Appendix D: Details about the @Pressure Extrapolation Function
79
N Value" for @Pressure Extrapolation
80
Errors Occur in Estimated Flow if Gauge and Actual "N" Don't Match
81
Appendix E: Tables to Adjust Flow Values for Temperature Difference
84
Appendix F: Tables to Correct Flow if Range Selected DID Not Match the Installed Range
86
Appendix G: Measure Supply or Exhaust Flow with a Gauge and Box
87
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88
Other manuals for Retrotec DM32
Getting Started
4 pages
Quick Guide
5 pages
5
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Retrotec DM32 Specifications
General
Brand
Retrotec
Model
DM32
Category
Measuring Instruments
Language
English
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