Retrotec DM32 - Manual (Page 4)

Page 4 of 94
©Retrotec Inc. 2014
Table of Contents
Important equipment-related safeguards ..................................................................................................... 8
1. Introducing the Retrotec DM32 series of digital gauge .................................... 9
2. Gauge overview ............................................................................................ 10
2.1 Make connections to the gauge ..................................................................................................... 10
2.2 Charge the battery in the gauge ..................................................................................................... 11
2.3 Power the gauge on and off – press for 2 seconds ........................................................................ 12
2.4 Read Results and control the gauge from the Home screen.......................................................... 12
2.5 Observe icons on Top Bar to monitor gauge status ....................................................................... 14
2.5.1. What speed is being sent to the fan on the “Fan Speed” output? ........................................ 14
2.5.2. Over what time period is the Result being averaged? .......................................................... 14
2.5.3. Result display can be frozen to write down values ............................................................... 14
2.5.4. Is the gauge connected to a Network? .................................................................................. 14
2.5.5. How much battery life is left in the gauge? ........................................................................... 14
2.6 Use keys on the Home screen to control gauge operation ............................................................ 16
2.6.1. [Channel A] Pressure Reading ................................................................................................ 16
2.6.2. [Channel B] Pressure Reading or Result ................................................................................ 16
2.6.3. Set the [Range/Device] connected to the gauge ................................................................... 17
2.6.4. Estimate Results with [@ Pressure] ....................................................................................... 19
2.6.5. Setting “n value” for @Pressure extrapolation ..................................................................... 20
2.6.6. Capture and apply a Baseline using [Settings] ....................................................................... 20
2.7 Gauge compensates for sensor drift with Auto Zero ..................................................................... 20
3. Get Results directly from the gauge ............................................................... 21
3.1 Connect Speed Control Cable between the gauge and fan ............................................................ 21
3.2 Connect pressure tubes to gauge ................................................................................................... 21
3.3 Control the test and read Results on the Home screen ................................................................. 21
3.3.1. Tap [Range/Device] to match Range on Device in use .......................................................... 21
3.3.2. Tap [Range/Device]  [Change Device] to change Device in use ......................................... 21
3.3.3. Tap [Set Speed] to run the fan at a particular speed ............................................................. 22
3.3.4. Tap [Jog] keys to adjust speed up or down 5% ...................................................................... 22
3.3.5. Tap [Set Pressure] to achieve a particular enclosure pressure ............................................. 23
3.3.6. Tap [Jog] keys to adjust pressure up or down 5 Pa ............................................................... 24
3.3.7. Tap [Area] or [Volume] to enter dimension for particular Results ........................................ 24
3.3.8. Tap [Channel A] to “Hold” readings and results .................................................................... 25