Blog: Martel Electronics

BetaGauge 330 has absolute pressure ranges

In June, we started shipping the BetaGauge 330 with available absolute pressure internal sensors. The 330 is now available with a 30 PSIA (2 barA) or a 150 PSIA (10 barA) internal sensor. Coupled with the 330’s built-in electric pump, this allows calibration down to about 20% of barometric pressure. If needed an external high… Read more »

Custody Transfer – It's the Law

Did you know that the accuracy and validity of natural gas custody transfer metering is covered under the US Sarbanes Oxley law? I didn’t either until I read this informative post by Jim Cahill over at the Emerson Process Experts blog. Here’s my short take on what’s required to do a professional job at custody… Read more »

BetaGauge 330 FAQ – 3

Q. Can the BetaGauge 330 be field recalibrated? A. Yes. The BetaGauge 330 is calibrated through the serial port like many Martel calibrators. Other than a computer with a terminal emulation program (we normally recommend HyperTerminal), a LEM232 serial communications cable is needed along with a URA-1 RTD adapter. Both of these can be purchased… Read more »

BetaGauge 330 FAQ – 2

Q. How often do I need to change the batteries? A. On the BetaGauge 330-150, we have tested the battery life by repeatedly cycling the pump to 150 PSI. Similar to the test for pump life, the cycle went to 150 PSI ten times and then rested for ten minutes.  This is a much higher… Read more »

BetaGauge 330 FAQ – 1

Q. How long does the internal electric pump last? A. Under normal use the BetaGauge 330 internal pump can be expected to last a minimum of 5,000 cycles to full pressure before requiring a rebuild. Since the pump won’t normally always be cycled to full pressure (typically 150 PSI / 10 Bar / 100 kPa),… Read more »

Reference Class – The Best of Both Worlds

Some of our competitors like to brag that by offering a percent of reading accuracy specification, they give better down scale performance than our percent of full scale specification. The problem is, that’s really not true. For the case in point, we’re talking about digital test gauges. Their very nice gauge has a specification of… Read more »

BetaGauge Makes Pressure Switches a Snap

One of the common and more tedious jobs done in the calibration field is pressure switch testing. The new BetaGauge 330 actually makes this job easy and relatively quick. We have put in some special features for this particular task. When the pressure switch function is selected, the calibrator goes into a special high speed… Read more »

A New Kind of Thermometer

In the current issue of Scientific American magazine, there is a short blurb about the invention of a new kind of thermometer that is able to interpret data directly tied to a fundamental number, the Boltzman constant. See the article here. Physicists like that kind of stuff. You know, a meter is the distance light… Read more »

History of the BetaGauge – Part I

Since Martel is introducing a new BetaGauge at the ISA Show in Houston (October 14-16), I thought it would be a good idea to give you a short history of the BetaGauge calibrator line. (Note, this blog was first posted on Friday, September 12th, but due to a technical glitch, it was lost). The immediate… Read more »