What external sensors work with the RSME?
The RSME works with a variety of analog and BACnet sensors to monitor ACH, RH, temperature, and differential pressure. See this guide for our recommendations.
Does the RSME have BACnet and Modbus communications?
Yes, the RSME has BACnet MS/TP and Modbus RS485 (no IP).
What electrical box (junction box) do you need to install the RSME?
The RSME is not compatible with standard electrical boxes. However, it comes with 2 custom size junction boxes. One junction box has a shallow mounting depth of 1.1" (27.5 mm), the second junction box is deeper, designed for walls with thick drywall (1.5").
How many rooms can the RSME monitor?
The RSME can monitor up to 3 rooms. Room 1 is monitored with the built-in pressure sensor. Rooms 2 and 3 can be monitored as inputs to the RSME with external differential pressure sensors (like the Dwyer MSX). Multiple room monitoring is configured in the RSME settings > configuration screens. See our instruction manual for more details.
How many parameters can the RSME monitor and display?
The RSME can display up to 4 parameters. Pressure is always displayed via the built-in pressure sensor. Two additional BACnet or analog inputs monitoring either pressure, temperature, relative humidity, or air change per hour (ACH) represent parameters 2 and 3. Lastly, a door status switch can be used as a 4th input to monitor for an open door.
I need to power 5 transmitters with a battery (24V) and have 4-20mA signals going to a DAQ. Is there a transmitter that can do this and how many wires does it have? Would a 24V battery pack be a good power source for these sensors? My setup is portable an
There are a couple of ways to do it. 4-20mA transmitters are very simple but are not the most reliable for portable/battery powered use as they're not the most energy efficient. Ratiometric outputs are a way to make a transmitter more reliable and consume much less power. This type of output is a 3 wire scheme with a linear DC voltage output from 0.5VDC to 4.5VDC. Our 626/628 series are offered with this type of output and a variety of pressure ranges.
What is the minimum set range for a part #3500-AL-15-NF-2? The manual states 2813" wc (no decimal)! I'm wanting to set the range to 0 - 100" wc.
The 3500 series has a turndown of 1:25, this means you can turn it down to 1/25th of its original range. Your range is 0-1000" w.c. This means the lowest you can range this is 1000/25, or 40 inches of water.
We ordered a bunch of MS2-D103-LCD pressure transmitters last year and need to order (20) more this year. It looks like the MS2 is not an option any more and we need to go with a MSX series. We just want to confirm that a MSX-U13-IN-LCD is the same unit a
Model number MSX-U13-IN-LCD would be perfect for duct applications to replace the MS2 unit you're currently using.
Please advice for a differential pressure transmitter for Hydrogen
Hydrogen is a combustible gas which would need a Class I, Div I, Group B rating.You can consider the Series 608 for lower ranges or Series 636D for larger ranges.
What is the maximum media temperature for the Series 626 transmitters. I'm considering one for a steam application at about 360F
The maximum media temperature for the Series 626 transmitter is 200°F. Unfortunately, this unit is not made to be used in applications with that high of temperatures.
I have a 626 pressure transmitter I want to use in 4-20 mA output mode. Trying to figure out what resistance I need. Two questions: 1) What are the units for the result of Rl-max = (Vps - 10)/20 mA DC? For a 12v PS I get 0.1. Is that ohms, Kohms or what?
If you use the equation RL-max=(Vps-10)/20mA DC without converting the 20mA to Amps then the results units will be in Kohms. The .1 that you calculated is in Kohms, so you will be to convert that to 100 ohms.
What does UFL displayed on the Dwyer Series 626/628 mean? The input Voltage is correct and it appears to be piped correctly, but my display says UFL and my output to my controller's input is -0.285vdc.
Our client has an MBLT pressure transmitter that appears to be malfunctioning due to scale buildup. The transmitter is installed to measure leachate level in a one-year old municipal sanitary landfill. What can we use to remove scale from the transmitter
If the issue is due to build-up which consequently plugs the small sensing holes, you might take a look at our PBLT2 or FBLT series. They are both more rugged and designed for sludge and slurries, whereas the MBLT and SBLT2 are better suited for cleaner applications such as ground water and wells.
Series 672 Low Pressure Transducer, is this pressure transmitter suitable for use with Natural Gas? The specs just mention 'suitable liquids and gases", but I don't see a list of what is suitable.
No, the 672 series low pressure transducer is not suitable for natural gas. It is not explosion proof nor compatible with combustible gases or liquids. As an alternative, depending on the range you need, I would recommend the 636, 3100, 3200G, or IS626 series pressure transmitters.
I am using a differential pressure transmitter model 629-02-CH-P2-E5-S1-LED to measure differential pressure of water. How do I convert the 4-20 mA signal to the differential pressure reading?
The 4-20 mA output from the 629 is linear over the range, which in this case is 0-10 PSID. Therefore, a 4 mA output will coincide with a differential pressure of 0 PSID, and a 20 mA output will coincide with a differential pressure of 10 PSID with a linear relationship between those two points. With that information, you should simply be able to scale your receiver accordingly.
We have a defective 629-04-CH-P2-E5-S1-3V DP sensor. The technician only wants to replace "just the sensor", not the entire manifold assembly. Can you give me the part number for this sensor?
Here is the part number you could use to replace just the sensor: 629-04-CH-P2-E5-S1. The “-3V” at the end of the model number is the valve manifold option. For any unit just order the model number before the “-3V” as a replacement pressure transmitter.
I need to protect a pressure transmitter from power surges and spikes. The model of the transmitter is: 626-09-GH-P1-E1-S1
If you are worried about power surges and spikes, we recommend that you use a regulated power supply in your system. See our Model BPS-005 low cost DC regulated power supply.
Trying to measure differential pressure between OSA and indoors. Using transmitters with a range of +25pa to -25pa. Monitoring pressure variations occur from basically 0pa to 20pa over a short period of time (15 to 30 sec) Building is basically closed dur
Whenever you are using outside air for a static pressure reference, fluctuations in outside conditions can cause erratic differential pressure readings. By using one of our outdoor static reference probes, you can diminish the influence of outdoor weather on your reading.
What is specified by the temperature coefficient and how is it important to my readings?
As the ambient temperature changes, the output current will drift slightly. The temperature coefficient specifies the amount of drift per °F/°C. Since the temperature affects the transmitter output, the temperature coefficient is important to accuracy of your reading.
A customer would like to get switching capability, local pressure indication, and a 4-20 mA output signal all in one device. Do we have a product to offer them?
Yes. The DH, DHII or DH3 possess high/low set points, digital gage display and 4-20 mA full scale output signal for air and compatible gas. The EDA, DPG-200, DPT and the MDPC possess high/low set points, digital gage display and 4-20 mA full scale output signal for compatible fluids.
Define Warm-up Time? Response Time? Loop Resistance?
Warm-up Time can be defined as the amount of time it takes the transmitter to "settle down" after initially being powered up to be able to provide its most accurate readings. Response Time is the amount of time required for the output to change after the input has changed. Loop Resistance is the maximum amount of resistance that can be in the current loop without dampening the transmitters output. Loop Resistance is a direct relation of input voltage.
How can the 4-20mA output signal of our transmitters be converted to a 1-5VDC or 2-10 VDC output signal in the field?
The 4-20mA output signal from our transmitters can be converted to a 1-5VDC or 2-10 VDC signal by inserting a 250 ohm or 500 ohm resistor respectively into the output loop.
What are the advantages of using a transmitter in a two-wire configuration as compared to a three or four-wire configuration?
A two-wire configuration is the most popular wiring hook-up used today for transmitters utilizing a loop power supply. It simplifies initial hook-up and troubleshooting, saving the customer time and money.
