ASHE STL-94 Manual de operação - Página 2

Procurar online ou descarregar pdf Manual de operação para Equipamento de gravação ASHE STL-94. ASHE STL-94 17 páginas. Stream selector

The ASHE Stream Selector Model STL-94 is a microcontroller based Instrument for the accurate process

control of a multi-stream system in Analytical applications. The STL-94 Stream Selector has a 20

character by 4 line back-lit LCD display which shows the process status and various setting parameters

for application specific timing and control of the four Streams. The STL-94 instrument provides a total

of 12 nos. of potential free relay contacts with LED indications on the front panel.

Besides the above, the instrument provides four nos. of 4 to 20 mA retransmission analog outputs

corresponding to each stream. The instrument provides Sample and Hold feature for these 4 to 20 mA

retransmission outputs.

The STL-94 Stream Selector offers two modes of operation, namely the AUTO and MANUAL modes.

The operational logic is as under :



In the Manual mode, the operator can select a particular Stream number.



In the Auto mode, there are two sub-modes of operation, viz., the Timer mode and Pulse

mode.

 In the Timer mode, the selected Stream Number is active for the set time.

 In the Pulse mode, the number of Streams selected based on the Pulse input.

1. RUN MODE

After Power Supply is switched On, in the RUN mode of operation, the Stream Selector will execute the

desired sequence of the Streams. The selected Stream output relay gets energized and the

corresponding Low Alarm, High Alarm & 4 to 20 mA Analog Output gets activated. The RUN LED on the

front panel will light up to indicate the instrument is in RUN mode.

The status of outputs is as follows: -

When the Operator presses the STOP key from the front panel, the microcontroller stops the process

at the current stream and deactivates the selected relay output with latched 4-20 mA Output. The

STOP LED on the front panel will light up to indicate the instrument is in STOP mode.

STREAM SELECTOR

OUR

HANNEL

STL-94

INTRODUCTION

DEFINITION OF TERMS

OUTPUT

STATUS

STREAM OUTPUT Activated

4-20 mA OUTPUT Activated

LOW ALARM

Activated

HIGH ALARM

Activated

ASHE CONTROLS PRIVATE LIMITED.

STL-94

TREAM

ELECTOR

Operation Manual