Blog entries

Simple Special: Y = 1/X

Administrator — Fri, 09 Dec 2011 09:52:09 +0100

Friday, August 19, 2011

Simple Special: Y = 1/X

Our customer needed a simple mathematical inverter: Output = (Constant) x (1/Input). Our standard product line includes analog division.

We simply disconnected input A and tied it internally to full scale.

The key requirement was that the user properly specify the input/output relat...

Model JH2376 Pulse Conditioner

Administrator — Fri, 09 Dec 2011 09:50:53 +0100

Tuesday, November 8, 2011

Product Focus - Pulse Conditioner

MODEL JH2376
PULSE CONDITIONER
Full-featured Model JH2376 is the "big brother" to our low-cost JH376/JH377 pulse amplifier & converter (blog posting Oct 10, 2009). Fully isolated and capable of handling voltages from 20mV to 250Vrms (700V peak-to-peak) it serv...

Custom Designs

Administrator — Thu, 08 Dec 2011 05:00:00 +0100

A well-known company needed to duplicate a thermocouple alarm they had bought from Action Instruments decades ago. Action was no longer able to provide it so they turned to us.
Action's original "Action Pak" line (Action's trademark) once included alarm modules with extra options such as retransmitting outputs and remote setpoint inputs. 20-pin headers (pin bases) were required to provide the extra connections. As far as we are aware these headers are no longer available.
...

Transmitters with 1 millisecond response time

Administrator — Thu, 08 Dec 2011 05:00:00 +0100

Last year we spotlighted a new design we'd done for a customer needing a quantity of fast-response transmitters. We've now turned it into a standard product offering.

Available on most of our DIN-rail transmitters (JH5000 Series), Option HS output is approximately complete (95% response) in 0.001 seconds. It is not avail...

Product Focus : Math Functions

Administrator — Tue, 17 May 2011 04:00:00 +0100

Add
Subtract
Multiply
Divide
Square Root
Square Function

Special Modifications:

Sum with unequal input weightings (for example, add flows from two different-size flowmeters or power from two different transducers).

Unequal input & output ranges (for example, input = 0-10Vdc, output = 4-20mAdc)

Output = A x B / C

Alarms with math functions

Others - let us know what you need

Available in plug-in, field mount and DIN rail styles.

Minisystem Measures Gas Flow

Administrator — Wed, 01 Dec 2010 05:00:00 +0100

Custom Mass Flow (Gas) Minisystem

Not new - we did this one a few years ago - but here's an example of what we can do.

An Alcoa extrusions plant in Spanish Point, Utah had been monitoring natural gas usage with turbine flowmeters (volumetric) but wished to convert to mass flow for improved accuracy. The turbine manufacturer could have provide...

Speaking of Specials....

Administrator — Sun, 07 Nov 2010 04:00:00 +0100

Pulse Amplifier:Special Product - leads to a second special - then two standard products - and then yet a third special!

A bit of "fun" history here - our standard Models JH376 & JH377 were introduced last year (blog entry October 10, 2009).

In 2001 an engineer at a Canadian company - lets call it "Company A" - contacted us. They were...

Discontinued Action Paks ? Call Us

Administrator — Sat, 18 Sep 2010 04:00:00 +0100

As most of you know, many years ago Action Instruments introduced plug-in "Action-Pak" transmitters and alarms.(Note: Action-Pak is an Action Instruments trademark.) Action grew, became a highly regarded company, added other product lines and were eventually acquired by Eurotherm. Their line still includes Action-Paks but some models are no longer available.

One of our favorite stories - a company called us desperately looking for a special version of an old Action module. T...

Thermocouple Application Note

Administrator — Mon, 30 Aug 2010 04:00:00 +0100

Unusual Thermocouple Application

Our customer's client had a large spa facility. The controls had been located near the spa, but the client felt they should be moved to a more benign environment, several hundred feet away. The system included four thermocouples. Sending thermocouple signals this distance i...

AC to DC Translation Monitors Shaker Motion

Administrator — Sat, 07 Aug 2010 04:00:00 +0100

Here's an application we did 10 years ago for a major manufacturer of membrane-based filtration equipment. They're still using it.

The need - to monitor and control filter movement. Motorized systems are used to oscillate large filter elements back and forth. Peak-to-peak motion is controlled using motor drives. Motion is continuously monitored using laser-based displacement (position) measurement equipment.

The problem – the laser’s output represents instantan...

Integrators - DC to Frequency Convertors

Administrator — Tue, 13 Jul 2010 04:00:00 +0100

Brand-new Models JH7500 & JH7501 integrators convert a DC measurement signal (voltage or current) to a proportional frequency. JH7500 is the general-purpose version. JH7501 operates at low pulse rates - its output is a set of relay contacts that 'click' at the output pulse rate.

Integrator - why the name?

The original - and still common - application is to totalize, or "integrate" flow measurements. A signal from a flowmeter represents flow rate (such as gallons per mi...

Detect Thermocouple Failure Without Upsetting the Process

Administrator — Sun, 23 May 2010 04:00:00 +0100

One from the archives. Our customer needed to alarm on thermocouple failure without shutting down the process.

Thermocouple instruments commonly include upscale burnout indication. If the thermocouple breaks or fails open-circuit the instrument's output goes high, just as if the temperature had gone out of control. This often is used to insure failsafe failure, shutting the process down and sounding an alarm.

Our customer, a utility, needed an overtemperature shutdown&n...

Current Booster

Administrator — Mon, 05 Apr 2010 04:00:00 +0100

THE BOOSTER!

Well, ok, not that booster!

Another "rush" special - to boost the current drive from a voltage signal. Our customer needed -10 to +10 volts to drive a 50 milliamp load. The voltage output from their control signal could supply only a fraction of that, so they needed an output-equals-input driver or current booster. They ca...

Two Wire Transmitters

Administrator — Sat, 13 Feb 2010 05:00:00 +0100

We recently picked up a new customer who ordered a few of our 2-wire thermocouple transmitters. This customer sells thermocouples and other temperature probes, and the manufacturer they represent also offers transmitters from a well-knows European company.
Why did they buy ours? The European br...

Standard Product, Nonstandard Connections

Administrator — Sat, 06 Feb 2010 05:00:00 +0100

Our OEM customer needed a fully compatible replacement for a thermocouple alarm module they once bought from England. Our Model JH1200 plug-in thermcouple alarm filled the bill, except the pin connections were different.

The answer was simple - take our standard product, unsolder the internal wires from t...

Two-Wire Transmitter - Potentiometer Input

Administrator — Sat, 30 Jan 2010 05:00:00 +0100

Our "sleeper" product - not new and, you would think, not particularly exciting, but people keep finding it and buying it, so we thought we'd feature it.

Pretty simple - takes a potentiometer input and converts it to...

Field Mount Enclosures

Administrator — Mon, 04 Jan 2010 05:00:00 +0100

In our last posting (December 26,2009) we highlighted our FDT5000 Series field mount transmitters with displays. If you don't need a display you can mount any of our plug-in transmitters and alarms in the two enclosures featured here.