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In addition, the APM can be programmed for one of three performance modes, as described earlier.
During the programming procedure, each mode is represented by a particular output voltage. They are as
follows:
Resolution-Preferred Mode - In the programming procedure, the Resolution Preferred Mode is
indicated by an output of 0 volts.
Balanced Mode - In the programming procedure, this mode is indicated by an output of +8.4 volts.
Update Preferred Mode - In the programming procedure, this mode is indicated by an output of
-8.4 volts.
The number of recirculations shown will also indicate which mode the APM is programmed, see
Mode Table below.
Mode Table
Mode Select Voltages* Recirculations
Resolution Mode = 0.0 V 8 recirculations
Balance Mode = + 8.4 V 2 recirculations
Update Mode = - 8.4 V 1 recirculation
* Voltages are approximate values.
When programming the APM, use the table below as a reference.
APM Programming Reference Guide
Press Approx. Output voltage Function Reference
SW1 (for 3 seconds) +4.2 Vdc Start program mode Step 1
SW2 see mode table Select mode Step 2
SW1 -4.2 Vdc Locks mode in Step 3
SW1 (setpoint 1) -2.1 Vdc Select setpoint 1 to program Step 4
or
SW2 (setpoint 2) +2.1 Vdc Select setpoint 2 to program Step 10
SW1 or SW2 Desired output voltage Select desired output Step 5 or 11
at setpoint 1 or 2 voltage needed at setpoint 1
SW1 and SW2 Setpoint voltage Lock in program Step 6 or 12
NOTES:
1. Always program setpoint 1 first, lock in program, then complete the steps to program setpoint 2.
2. When adjusting the output voltage (step 4) make sure the magnet is in the position of the setpoint.
3. Setpoint 1 will always be the setpoint closest to the transducer head.
4. If a mistake is made during programming, turn off power, wait a few seconds, turn power on and start over.
It is necessary to monitor the analog output with a digital voltmeter while performing the following steps.
1. Move the permanent magnet to the desired position for Set Point 1. Press the SW1 push-button until
the APM enters the programming mode (3 seconds) and acknowledges by producing an output voltage
of about +5 volts. Release the SW2 button.
2. Press and release the SW2 button to enter the performance-mode setup mode. The APM will acknowl-
edge by producing an output voltage which corresponds to the currently stored performance mode
(see below). If the APM has never been programmed, the default mode will be resolution-preferred
(that is, the output voltage will be 0 volts).
• Resolution Preferred Mode = 0 volts
• Balanced Mode = +8.4 volts
• Update Preferred Mode = -8.4 volts
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