Roland ep-5 Service Manual download pdf (Page 11)

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7. Calibration

P5/EP5 is when shipped from PMV pre-

calibrated for 90 ±0,5 deg rotation, (can also be

30, 45 or 60 deg, see installed cam).

For most applications the valve closed position

is more critical than valve open position,

most attention should be paid at valve closed

position. Always start calibration procedure by

applying 0 % input signal, then adjusting zero.

P5/EP5 is calibrated by turning thumb wheels 1

& 4.

Arrows on arm 5 indicate turning direction of

thumb wheels.

< “+“ = Increase zero/span

> “-“ = Decrease zero/span

Calibration procedure

Check cam seating, section 9 before starting

calibration procedure.

1.Apply 0 % input signal (0% = 20 kPa/3 psi

or 4 mA)

2.Wait for steady state.

3.Adjust zero by turning the silver (lower)

thumb wheel 4 with finger or with screw

driver 7 from the outside.

4.Apply 100% input signal (100% = 100 kPa/

15 psi or 20 mA)

5.Wait for steady state then memorize result.

6.Apply 0% input signal.

7.Adjust span if necessary. This is done by

first loosing screw 2, then turning the

yellow (upper) thumb wheel 1 “+“ or “-“

and finally tighten screw 2. Spring top must

not be in contact with spring guide 3.

8.Check zero and adjust if needed.

9.Repeat steps 2 to 8 until desired calibration

is achieved.

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