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© Retrotec 2022
Table of Contents
Important equipment-related safeguards ..................................................................................................... 7
1. Introducing the Retrotec DM32X Digital Gauge ............................................... 8
2. Gauge overview .............................................................................................. 9
2.1 Make connections to the gauge ....................................................................................................... 9
2.2 Charge the battery in the gauge ..................................................................................................... 10
2.3 Power the gauge on and off ........................................................................................................... 11
2.4 Read Results and control the gauge from the DM32X Gauge App Home screen .......................... 11
2.5 Observe icons to monitor gauge status .......................................................................................... 12
2.5.1. What speed is being sent to the fan on the “Fan Speed” output? ........................................ 12
2.5.2. Over what time period is the Result being averaged? .......................................................... 12
2.5.3. Result display can be frozen to write down values ............................................................... 13
2.5.4. How much battery life is left in the gauge? ........................................................................... 13
2.6 Use keys on the Home screen to control gauge operation ............................................................ 13
2.6.1. [Channel A] Pressure Reading ................................................................................................ 13
2.6.2. [Channel B] Pressure Reading or Result ................................................................................ 14
2.6.3. Set the [Range/Device] connected to the gauge ................................................................... 14
2.6.4. Estimate Results with [@ Pressure] ....................................................................................... 16
2.6.5. Setting “n value” for @Pressure extrapolation ..................................................................... 17
2.6.6. Capture and apply a Baseline using [Settings] ....................................................................... 17
2.7 Gauge compensates for sensor drift with Auto Zero ..................................................................... 17
3. Get Results directly from the gauge ............................................................... 18
3.1 Connect Speed Control Cable between the gauge and fan ............................................................ 18
3.2 Connect pressure tubes to gauge ................................................................................................... 18
3.3 Control the test and read Results on the Home screen ................................................................. 18
3.3.1. Tap [Range/Device] to match Range on Device in use .......................................................... 18
3.3.2. Tap [Range/Device] [Change Device] to change Device in use ......................................... 19
3.3.3. Tap [Set Speed] to run the fan at a particular speed ............................................................. 19
3.3.4. Tap [Jog] keys to adjust speed up or down incrementally .................................................... 20
3.3.5. Tap [Set Pressure] to achieve a particular enclosure pressure ............................................. 20
3.3.6. Tap [Area] or [Volume] to enter dimension for particular Results ........................................ 21
3.3.7. Tap “Hold” to hold readings and results ................................................................................ 22
3.3.8. Tap [Channel B] or [Settings] to change Result or units to be displayed .............................. 22
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