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Loop Powered Indicator

> Introduction ::

Pantech's Loop Powered Indicator, model 808 is an ideal instrument for providing indication in the field where power supply is not available. The instrument derives power from the loop, i.e. 24 V DC fed to the two wire transmitter or from the 4 – 20mA DC signal fed to the load and displays the value on a seven segment 3 ½ digit LCD indicator. In doing so, it utilises around 150 ohms of the load capability of the current source.

Model 808 indicates the value in engineering units or in terms of percentage. The calibration can be done in the field by zero and span potentiometers provided in the unit and jumpers for range selection. Jumpers provided can also shift decimal point of the display.

The instrument is available in weatherproof or explosion proof housing for field mounting, and in DIN format as well as 96mm * 96 mm * 100mm panel mount version.

Low drift precession components are used for long term accuracy of the instruments. All instruments undergo a burn-in for better reliability.

> Specifications ::

Input

Current, 4 - 20 mA DC

Input Impedance

150 on loop

Display

3 ½ digit LCD

Display accuracy

+/- 0.1% of span

Power supply

Not required

Power consumption

60 mW max. at 20 mA DC

Ambient temperature

0 - 50° C.

Storage temperature

0 - 70° C.

Humidity

90% RH (non-condensing)