Sierra Not available instruction manual Introduction

Series 900 Single & Dual Instruction Manual

The Sierra Instruments, Inc. Single and Dual Channel System Electronics is a highly integrated systems solution to flow mea- surement and control.

One or two independent flow meters or controllers can be operated simultaneously.

Linear operation with LCD readout is standard.

The back panel connectors provide outputs of 0-5 VDC and 4-20 mA and are 0-100% analogs of the flow range. Both voltage and current outputs are simultaneously available.

Flow setpoint for flow controllers is from either the front panel adjustment potentiometers or a remote source via the back panel I/O interface. These potentiometers are only available on system electronics which have a “C” as part of the model number (i.e., 902C).

Side-Trak mass flow controllers also incorporate valve purge/ monitor/off functions which are accessible from the back panel I/O connector.

Each channel has an optional high and/or low alarm (open collec- tor) output. The alarm adjustment pots are located inside the system electronics box and can be read on the front panel display during adjustment.

An optional built-in totalizer on single channel configurations displays the total mass flow. The electronic totalizer is highly immune to power line interruptions.

The power supply is a linear (non-switching) laboratory quality unit capable of easily supplying power to 2 channels simulta- neously.

1 INTRODUCTION

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