How to Re-Range a Series 3100D, 3100MP, or 3200G Pressure Transmitter

Question: How do I Re-Range a Dwyer Series 3100D, 3100MP, or 3200G Pressure Tranmitter?

Answer: To start off, we’ll need to remove the top cover to access the zero and span buttons. Loosen the right screw of the nameplate and slide the nameplate away to reveal the buttons.
To begin we need to access the menu. Press and hold the ZERO and SPAN buttons simultaneously until MENU appears. Once the buttons are released 1 TRIM will be displayed, which is the first of three submenus. To cycle through the submenus, simply press the ZERO button. Please note that you may need to press the button for up to 2 seconds or until the display changes. The following menus will be 2 SETUP and 3 LCD. For this demonstration, we will only be using the SETUP menu.

Once you are on SETUP, press the SPAN button to enter the SETUP menu. 21 UNIT will be displayed and this is where you can change the engineering units if needed. We are going to leave this at the default, which is inches of water column. Move to the next parameter by pressing the ZERO button, where 22 U-RNG will display. This stands for upper range and will represent the 20 mA signal. From here, press the SPAN button and SEL INC will display. This stands for Select Increment, which will allow us to change the values based on a multiplier instead of one unit at a time if you choose. To cycle through, press the ZERO button and then press the SPAN button to select the desired increment. After the increment is selected you will see the upper range, in this case 30, and value. We can increase the value with the ZERO button and decrease the value with the SPAN button. Once the desired upper range or span value is displayed, press the ZERO and SPAN buttons simultaneously to back out to the select increment menu. By pressing the ZERO and SPAN buttons a second time, you will save the upper range, done will be displayed, and you will be redirected to the main screen.

To set the lower range we will use the same steps. Press and hold the ZERO and SPAN buttons until MENU is displayed. Once the buttons are released 1 TRIM will be displayed. Press the ZERO button to go to SETUP. Press the SPAN button to enter the SETUP menu but this time we are going to press the ZERO button until we get to 23 L-RNG which stands for lower range and will represent the 4 mA signal. We will then press the SPAN to access the SELECT INCREMENTS menu. Once the increment is selected we will set the lower range we would like. Please note you cannot exceed the calibrated span which is this case is 30” w.c. Once the desired lower value is selected press the ZERO and SPAN to back out to the SELECT INCREMENTS menu, then press them both a second time to save. Once done is displayed and the unit returns to the main menu your pressure transmitter will be re-ranged and ready to use.

To learn about the Series 3100D, 3100MP, or 3200G Pressure Transmitters, please visit our website https://dwyer-inst.com/en/products/pr...