Instruction Manual

Global Water

800-876-1172 • globalw.com

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The model 378 is a high performance industrial grade digital indicating single set point

PROPORTIONAL /ON - OFF controller for use with type K, J ,T and E thermocouple.

Thermocouple gain and cold junction are automatically compensated by internal

electrode circuits.

An accurate 1 mV per display count analog is provided to interface the instrument with a

recorder, printer, and so on.

Table of Contents

I) Inspection................................................................................................................ 3

II) Specifications.......................................................................................................... 3

III) Mounting procedure................................................................................................ 4

IV) Wiring diagram....................................................................................................... 6

V) Analog voltage output............................................................................................. 6

VI) Controller action ..................................................................................................... 6

VII) Bandwidth adjust .................................................................................................... 7

VIII) Controller set and reset ........................................................................................... 7

IX) Relay and front panel LED format.......................................................................... 8

X) Thermocouple burn out protection.......................................................................... 8

XI) Trouble Shooting .................................................................................................... 9

XII) Warranty ................................................................................................................. 9