A crane overload monitoring and alarm system using INT4 digital panel meters and Fusion large remote displays...
Thank you very much for this – this has saved me hours of work.
PN - Development Engineer
INT4-L load cell / weighing digital panel meter display - easy to use!
The INT4-L is our most popular 1/8 DIN weighing panel meter display which accepts standard load cells with 4 or 6 wire connection and 10V excitation up to 120mA.
This digital panel meter is easy to use and has high precision and stability. You can set the weight display to have 2, 3, 4, 5 or 6 digits, depending on the type of measurement you want to make. You can also set the decimal point position.
This load cell panel meter can be fitted with isolated output signal modules to add filling control and data sharing functions.
Tamper Proof ...
This digital panel weight meter is also available with a plain front panel. All settings can be locked to prevent changes after commissioning.
The small window in the bottom right can have text to identify the units of weight, torque or force such as kg, te, kN, lbs, Nm etc.
The display colour is available in red or green.
A Crane Load display with visual and audible alarms, using the INT4-P
Shown here mounted in a wall mounting enclosure, with SPC4 IP67 splashproof front cover. The meter also has the MEM multi-program memory option, selected by a switch on the left of the display, to call up one of 2 programmed load ranges.
Here a Fusion large digital display is summating the loads measured by 6 INT4-L load cell displays. Summation is digital, with data collected over a 3 wire RS485 data link.
New: Ex nR Atex Displays
For hazardous areas we can offer the following explosion proof options on most models. Tell us what you need and we will be pleased to quote for Atex certified systems
Zone 1 ii 2 G Ex px iiC T6/T5/T4 Gb *
Zone 2 ii 3 G Ex nR iiC T6/T5/T4 Gc **
EXD Zone 2 on request - POA
* - Requires pressurised air system
** - any product
The London Electronics ATEX certified products are supplied certified for use in the condition in which they are supplied. No liability will be assumed for any loss or damages of any nature, direct or indirect, including any loss of profits or consequential damages, injury or death suffered or incurred by the buyer as a consequence of failure to install, use and/or apply the product within the scope of the installation document and certification supplied.
6 screw terminals for 4 or 6 wire bridge load cells.
20 bit A/D converter mV range 0-5 to 0-40mV - 0.5mV/V to 4mV/V
100 Megohm input resistance.
Adjustable 0 to 25 Seconds. Active filter.
Last digit Round-up
Up to 10 points, direct or theoretical calibration.
Front panel controls
Calibration, Tare, Reset, Max/Min, Alarms
100-240 VAC std, 11-30VDC option. 10VA Power burden, max.
+/-0.05% of range
Thermal stability - range
Thermal stability - offset
Optional plug-in 16 bit module Linearity +/- 0.02% of range
0-20/4-20mA into 0 to 500 Ohms Resolution 0.4uA 0-10V into loads >600 Ohms Resolution 0.2mV -10 to+10V into loads >600 Ohms Resolution 0.4mV
Accuracy 0.1%of range Stability 50ppm/C
Fully isolated from input and power Fully scalable with digital precision
Special features Forward and reverse action possible Can be set to operate from nett or gross value.
Adjustable hysteresis In-flight compensation facility. Energise or de-energise on trip
Special features Adjustable timers to set energise and de-energise delays. Can also be set to pulse for applications needing less than 100% duty cycle. In-band and out-of-band alarm function. Manual and automatic in-flight compensation. Can be set to operate from nett or gross value.
Serial data output
Optional plug-in modules. RS232 RS485 Addressable On demand or continuous output.
Special features Can include time and date with RTC option fitted. Can be set to operate from nett or gross value.
6 digits, 14mm high. 7 metres max. viewing distance. 10 readings per second. Variable brightness from front panel.
Red - standard. Green - optional
Digital menu-free system, direct or theoretical.
In addition, separate Offset and Scale variables allow you to convert the reading, without affecting calibration.
For example from oC to oF, kg to pounds etc.
10V DC up to 120mA, to power input sensor. Ratiometric.