Even though the open linear encoders allow large mechanical mounting tolerances,
it is recommended to inspect the mounting by checking the quality of the output signals.
There are various methods of checking the quality of the output signals.
The signals can be connected to an oscilloscope and checked for conformity with signal specifications.
This method requires effort, training and expensive test equipment (oscilloscope).
Often one or all of these items are unavailable to the installing technician.
As an alternative to this method RSF offers different signal test boxes - PG1, PG2-I, PG3-I, PG4, PG-U.
With these test boxes all encoder signals can be quickly and easily checked.

The PG1 is an all-purpose signal test box where all the relevant signals are displayed on LCD Bars.
The counting signals, the reference mark signal, and the switch signals are displayed separately.
The PG1 allows the quantitative as well as the qualitative evaluation of the encoder signals.

The PG2-I, PG3-I and PG-U are used for easy mounting and checking the quality of the output signals
of incremental Linear Encoders.
These PG test boxes checks all relevant signals;
amplitude, phase and offset, and displays the results in a
qualitative format on a polychromatic LED display.

Counting signals:
LED red (out of tolerance)
LED green (in tolerance)

Reference mark signal:
LED red (out of tolerance)
LED orange (slightly out of tolerance)
LED green (in tolerance)

Switch signals S1, S2:
LED green (function OK)

PG4 - Function control and signal inspection with two LEDs.
The PG4 is used for easy mounting and checking the quality of the output signals of incremental Linear Encoders of the MS 40 series. The PG4 test box checks all relevant signals; amplitude, phase and offset, and displays the results in a qualitative format on a polychromatic LED display.
Status of the LEDs:
Counting signals: LED red (out of tolerance) LED green (in tolerance)	Reference mark signal: LED red (out of tolerance) LED green (in tolerance)