This board is meant as a drop-in replacement for the GEA®/Westfalia® ACR-1 board. Functionality is virtually the same, however the design has been modified to accommodate both the older ACR1 and newer ACR1-SS boards. Additionally, milk sensitivity and strip adjustments have been greatly simplified from the original.  This document only provides setup information for the PCB itself, for full installation instructions please see the documentation from GEA®.

1. Install Terminals:

Press terminal block plugs
onto pin headers.

2. Attach wires and light:

Configuration 1:

To configure as the older, larger
ACR1 board, attach the lamp
connector to J1, and the 4 small
spade wires to J2.

Configuration 2:

To configure as the smaller ACR1-SS
board, snap off the tab at the top of
the PCB and attach the forked wires
to the lamp connector to J1, and
the 4 large spade wires to J2.

3. Mount board in box:

Use provided nylon thumbscrews to attach
PCB into box. These can be screwed in by
hand without the need of a driver. There
are two thread types (male/female) provided.
Select the appropriate one for your application.

4. Configure Board:

Press the button under the 7-segment display to
configure the strip time and the milk sensitivity. An
LED will flash underneath the selected configuration potentiometer. Adjustment of strip time is in
seconds; adjustment of milk sensitivity is in ohms.

Note: By default, memory strip is enabled. To
disable memory strip, hold the button until the
“Memory Strip” LED flashes and then select
“On” or “Off” using button.

5. Operation:

  1. When start is pushed, the reversing valve is released and the claw is attached to the cow. The unit also enters into an “initial delay” mode for 1.5 minutes (default) where milk sensing is disabled while waiting for milk flow. The left decimal point will light during this time.

  2. After the initial delay times out, the unit begins the “milking phase” (the middle decimal point lights) and milk sensing begins.

  3. When milk flow quits, strip timing begins. The light will turn on when there is no milk flow and turn back off if flow is sensed again. During strip time, the default setting is for the amount of time the light is on to be totaled (memory strip) and compared with the strip time setting. When they are equal, the reversing valve activates and the claw is taken off the cow. The rightmost decimal point mirrors the light.