Product category:
Chart recorders, indicators and totalisers
News Release from: Amalgamated Instrument Co | Subject: LD-TM
Edited by the Processingtalk Editorial
Team on 14 February 2003
More control from large digital displays
Amalgamated Instrument Co has enhanced its range of large digit displays, to add set-point relays, remote programming, and linearisation tables for configuring input readings - all within the display
Even more control - Relay and Remote! Amalgamated Instrument Co has further enhanced its range of large digit displays The displays are now equipped with 2 set-point relays as standard and some models, such as the LD-TM "Universal" displays and the LD-WT 4-wire strain bridge models are now supplied with 4 relays
This article was originally published on Processingtalk on 17 Dec 2002 at 8.00am (UK)
Related stories
Hand held weight meter recognizes sensor
Portable meter uses stored values to adjust calibration data to the sensor interrogated, on any 4-wire sensor
Bar graph for better panel displays
A graphical representation of a measurement is often valuable in allowing quick accurate decisions to be made, so AIC has added a bar-graph display option to their range of panel instrumentation.
The relays are form A, with a capacity of 5A at 240VAC (resistive load).
All the relays are individually configurable with high and low set-points, trip and reset times, hysteresis (deadband) settings and operating mode (normally open or normally closed).
In addition, in some models, relays 1 and 2 can be configured for proportional/integral control operation.
Further reading
New DIN rail pH Monitor has advanced features
The RM4-PH DIN rail unit from Amalgamated Instruments accepts input from all conventional pH electrodes and also from a temperature sensor, for compensation
Intelligent loop powered pH transmitter
The Amalgamated Instrument RT4-PH intelligent loop powered pH display/transmitter offers features such as automatic temperature compensation and display, plus scaled output across part of the range
Wind sensor has no moving parts!
Amalgamated Instrument Co has announced the availability of a wind speed and direction sensor with no moving parts, using solid state thermal measurement
The PI operation can be set for pulse width modulation control mode or frequency modulation control mode.
This allows for progressive and accurate control of equipment such as dosing pumps, heaters etc Also announced is a remote programmer module for the AIC large digit displays.
The remote unit is plugged into the display main board and set-up and calibration can be carried out remotely.
This is especially valuable in situations where the display is installed in a high location to provide good visibility.
The operator is relieved of the necessity to climb up and down to make changes.
Once plugged in, the remote programmer allows changes to be easily made.
The unit is equipped with 10 metres of cable.
AIC large digit displays are available in digit sizes from 38mm to 200mm with some sizes available in both bright red LED or yellow "flip" electromagnetic display styles.
The "flip" digit displays are ideal for exterior use.
The LED models can be configured with an auto-brightness feature to cater for changes in ambient light levels.
One typical application for these displays involves measuring the liquid volume contained in a cylindrical tank mounted on its side: the unit can even give the volume readout for liquid contents in an irregularly shaped tank.
How do you determine the level or contents in such situations? Amalgamated Instrument Co has a range of instrumentation with linearisation to give accurate readings based on the output from an analogue transducer such as a pressure level transducer or ultrasonic level transducer.
The panel mount PM4-LN has a 50 point lineariser table.
By entering values for various transducer outputs, the user can compensate and get an accurate measure of contents.
The linearisation table, once set, is backed up in non-volatile memory so it is not lost in the case of power failure or relocation of the instrument.
AIC also has a panel mount lineariser instrument with totaliser functions - the PM4-LNT.
The PM4 instruments are available with a choice of displays and a wide range of power supply and output options.
A single set point relay is standard in the PM4 range.
A panel mount 4 digit display, the PM6-IV, has a 16 point lineariser as standard.
The PM6 range does not offer output options.
A DIN rail mount instrument with a 50 point table, the RM4-LN, is offered for those situations where the rail mount style is preferred.
In use, the irregular container has known contents added and the transducer output is noted.
Once sufficient readings have been taken, the values (contents and transducer output) are put into the linearisation table and saved.
The display will then, in future, give an accurate measure of the contents based on the table.
• Amalgamated Instrument Co: contact details and other news
• Email this article to a colleague
• Register for the free Processingtalk email newsletter
• Processingtalk Home Page
Search the Pro-Talk network of sites
