How to install a Monnit wireless pressure sensor.
The Monnit Wireless Pressure Sensor is capable of measuring gas, liquid or vapor pressures from 0-160 PSI. This solution uses a combination pressure gauge / transducer interfaced to a Monnit wireless radio. It is suitable for any application capable of using a bourdon-tube based pressure gauge. The use of pressure snubbers, pulsation dampeners, and other appropriate devices can increase the range of applications available to pressure gauges. It is a prudent practice to use these items in any type of precision pressure instrument.
Do not tighten using the case
When installing and tightening the gauge, apply a wrench to the wrench flats located just above the threaded portion of the pressure fitting only. DO NOT tighten by using the gauge case housing, even by hand, as this may damage the unit or cause a calibration shift.
Suitable Sealing Method on Threads
For gauges with NPT type pressure fittings, apply Teflon tape or an equivalent appropriate sealant to the threads before installing to ensure a leak free connection. Even a very small leak may cause an inaccurate reading.
Vibration and Pulsation
The unit can withstand normal gauge vibration without damage or significant output effects. However, it is a good practice to mount the pressure gauge where vibration is minimized. In addition, it is a good practice to use an appropriate throttling device to decrease the effects of more severe pressure pulsation and/or vibration on pointer movement, including throttling screws, pulsation dampeners, elastomeric bladders and pressure snubbers.
Adjustment of Zero and Span
Adjustment of zero and span requires a specific factory procedure and pressure calibration standards. Do not attempt to do this without approval from the factory to avoid voiding the warranty.
Connecting Power to The Pressure Sensor
Take care when connecting the power source to the Monnit wireless pressure sensor. The grey cable connects the pressure gauge to the wireless radio. The two wires coming out of the wireless tranceiver require 12-32 VDC power which is passed to the pressure gauge / transducer to enable operation.
Connect the positive side of the 12-32 VDC supply power to the red lead wire and the negative side to the black lead wire.
Note: The wireless radio requires 3 VDC and is powered by either a coin cell battery, 2 AA batteries or a single 3V AA battery, depending on sensor platform. Batteries are included with the sensor when purchased.
For more information on using Monnit wireless sensors, visit the support section of our website.