Laboratory Power Supply Products from TTi - Thurlby Thandar Instruments

Four digit Meters

The EX-R series incorporates separate voltage and current meters on each main output with a resolution of 10mV and 1mA (EX355R and EX354RD/T) or 10mA (EX1810R/2020R/4210R).

The fixed resolution avoids the misinterpretation of readings that can occur with auto-ranging 3 or 3½ digit meters where the decimal point position moves as the reading changes.

Remote Sensing

Each main output incorporates remote sense terminals that can be enabled or disabled at the flick of a switch.

Remote sensing is essential for maintaining precise regulation at the load and true metering of the load voltage. Many other power supplies omit remote sense, and quote regulation figures that could never be achieved in practice.

An Example

A 2 metre length of a 24/0.2 wire pair has a resistance of around 0.1 Ohms. For a 5V load drawing 3A the metering error without remote sense would be 0.3V and the effective full current load regulation would be around 6%, against a quoted figure of perhaps 0.01% for the power supply itself.

Simplicity in use

EX-R series power supplies use classic analog controls for voltage and current.

The large and bright displays have a fixed resolution to avoid confusion.
Preset voltage and current levels are shown when the DC output switch is turned off.
Remote sense is available when needed but is disabled by setting the switch to Local.