Fisher & Paykel MR730 Manual De Usuario

13

Ref. 185040646 MR730/720/700/480 Technical Manual ¯ Revision F ¯ Issued March 2001

1

Plug in the 41 °C calibration probe.

2

Gain access to the adjustment potentiometers VR4 and VR5, by removing the control board from the humidifier
front panel.

3

With the Chamber Temp button held down turn on the power switch. Display should show -1-

4

Using the Chamber Temp button step through to number -4-

5

Starting with a vertical bar display adjust VR4 so the display changes to an all 

8 display. If VR4 is rotated too

far the display becomes all horizontal bars (||.||.||. thru 

8.8.8. to ===). The correct point is where all the

segments of the all 

8 display are of equal brightness.

6

Using the Chamber Temp button step to number -5-

7

Remove the 41 °C calibration probe.

8

Adjust VR5 for a display reading of zero. (0)

(This value may drift over time. A deviation of up to ± 2.0 will not affect circuit performance.)

9

Calibration is complete; do performance check (§ 6.0)