User Manual

Global Water

800-876-1172 • globalw.com

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The models 3675 & 3676 are precise instruments for the measurement and control of pH

and mV (ORP).

Two output relays are provided for ON/OFF control. The isolated 4-20 mA current output

covers the input control range of 0 to 14 pH and 0 to 1400 mV.

Both models are housed in a rugged 1/4 DIN plastic case. This allows the meters to fit

into standard panel cutouts, while providing industrial weatherproof and environmental

housings.

Table of Contents

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

II) The Meter................................................................................................................ 3

II) Temperature Compensation.................................................................................... 4

III) Rear Panel Connection............................................................................................ 4

IV) Mounting Procedure................................................................................................ 5

V) pH Calibration......................................................................................................... 5

VI) Isolation Voltage..................................................................................................... 6

VII) Output Load ............................................................................................................ 7

VIII) Controller Output Features ..................................................................................... 7

IX) Alarm Relay And Led Formats............................................................................... 7

X) Isolated 4-20 mA Output ........................................................................................ 8

XI) Trouble Shooting .................................................................................................... 8

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