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Triple Validation Unit

Triple Validation is a widely accepted method of ensuring reliable control of critical processes and is often used in drinking water treatment control. Applications also exist in a range of other processes. For example the unit can be used to monitor water levels upstream, downstream and within screens when they are applied in water courses prone to flooding.

Our Triple Validation Unit will take 4-20 mA inputs from any suitable instrumentation and is ideal as a low cost upgrade for old GLI and Capital Control units. The unit is easy to setup and provides a wide range of validation algorithms, providing the additional security of multiple measurement points with minimal setup overhead.

For specialist advice call:

+44 (0)1726 879800

Online Enquiry
View Related Product Documents
  • Overview
  • General Specification
  • Input/Output Specification
  • Ordering Information

The unit will alarm if one of the levels is out of step with the others, warning of a screen blockage and allowing an operator to visit site before a flooding event occurs. The Triple Validation Unit monitors three process signals, all covering the same parameter and performs a check on the signals under one of a number of optional algorithms. The inputs can come from our own sensors or from existing third party products.

Option 1: Average of Nearest Two Inputs
Option 2: Average all Three Inputs
Option 3: Accept Middle Value

Alarm outputs are provided giving warnings where one or more input signal is considered to be out of its acceptable working range. If your process needs an alternative validation algorithm we are more than happy to add more control options.

Dimensions (hxwxd)185 x 213 x 95 mm
Weight1.4 kg
Protection ClassIP65
Enclosure MaterialPolycarbonate
Cable Entry1 x M20, 4 x M16, 1 x USB Type A
Cable Core SizeMax Conductor Size 2.5 mm²
Power Supply85 to 264 VAC 50/60 Hz
Power Rating30 W
If more than two TurbiTechw² Sensors are to be used than an external higher rated power may be necessary
Environmental Data
Operating/Storage Temperature-20 to 60ºC, 0-95% Relative Humidity, Non-Condensing
User Interface
DisplayGraphical LCD, Black on White, Transreflective
Viewing Area78 x 59 mm
Back LightOn/Off/On after Keypress with user adjustable contract
Membrane Keypad6 Key, pillow embossed, 20 mm diameter
Analogue3 x 0/4-20mA
Input TypeType 2 - 2-wire, transmitter powered by TVU
Type 3 - 3-wire, transmitter powered by TVU
Type 4 - 4-wire, transmitter powered independently
Load100 ohms
Analogue1x 4-20 mA, maximum load 750 ohm
Relay TypeSPCO
Relay RatingMax 2A @ 30VDC/230VAC
Auxiliary ConnectionsConfigurable for Remote Input, Device Power

The Triple Validation Unit can be ordered by using the part numbers and descriptions below

Part NumberDescription
224503Triple Validation Unit (100 to 240VAC, 3 x 0/4-20mA Inputs, 1 x 0/4-20mA Output, 3 x Relay Outputs)
226029Triple Validation Unit (9 to 36VDC, 3 x 0/4-20mA Inputs, 1 x 0/4-20mA Output, 3 x Relay Outputs)

To speak with one of our specialist advisors, call +44 (0)1726 879800
or complete our Online Enquiry