AS950 Program Example: Dry Contact / External Relay Trigger

Document ID

Document ID TE12162

Published Date

Published Date 12/18/2019
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Question
AS950 Program Example: Dry Contact / External Relay Trigger
Answer
The below instructions have been put together to assist Operators wanting to trigger a sample when using an AS950 and specifically relates to the following trigger events:
  • A pulsed input or 4/20mA input from a flow meter
  • A simple dry contact or relay trigger (voltage supplied by AS950 sampler).
This program is perfect for operators wishing to trigger a sample via SCADA.

Special Note
Please input the following exactly as they appear below. I would like to prove this program works on your individual AS950 unit. Once the concept program has been proven on your unit, the program may be modified to suit your individual sampling requirements.

Programming Instructions
Enter the below on your AS950 unit:

Step 1: General Settings
  • Select Menu
  • Select General Settings
  • Select Unit Preferences
  • Select Unit System
    • Select Metric

Step 2: Hardware Set Up
  • Select Menu
  • Select Hardware Set Up
  • Select AUX and I/O Port
    • Select Mode > Select Sample Event
    • Select Flow Reading > Select AUX Pulse
    • Select Pulse Timeout > Select 6 secs

Step 3: Sampling Program
  • Select Menu
  • Select Programming
  • Select Sample Programming

Note: the template (top of screen) should be Custom Single

In the Sample Programming Menu:
  • Total Bottles
    • Enter Number of bottles: 12
  • Bottle Volume
    • Enter bottle volume: 1000ml
  • Tubing
    • Length: 300cm
    • Diameter: 9.5mm (3/8&rdquo)
  • Pacing: 1 Counts
    • Flow Weighted
    • Flow Source: AUX-Pulse
    • Override: Disabled
    • Target: 1 Counts
    • Take First: Immediately
  • Sample Volume
    • Sample Volume: Fixed
    • Volume: 500ml
  • Distribution
    • Distribution: Sample Based
    • Bottles per sample: 1
    • Samples per bottle: 1
  • Program Start
    • Immediately on Run
  • Program End
    • Type: After Samples
    • Samples: 10

Step 4: Run/Halt Program
  • Select: Run/Halt (located on Keypad)
  • Select: Start Program

About this Program
Using the above instructions:
  • The AS950 will trigger an immediate sample upon program start up.
  • Both the pump head and the distributor arm will engage.

To verify the program is functional:
  • Connect the AUX cable (#8528500 or #8528501) to the AUX port located on the left hand side on the AS950 Controller
  • Dry Contact: Cross the Orange & White wires to trigger a sample.
  • Wet Contact: Apply 12v to the Blue (negative return) & Orange (positive return) wires to trigger a sample. Polarity matters.

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