Labconco Logic+ A2 User Manual

147
2. To verify the PWM measured in step 1 c (above) is correct, access the Tools
submenu from the display. Follow the steps in Figure 13-8 to identify the PWM
signal the microprocessor is sending to the blower motor.
3. Divide the PWM voltage measured in step 1 c (above) by the DC voltage
measured in step 1 b (above). For example, 13.7 volts measured across pins 1
& 10 (PWM line), and 23.7 volts measured across pins 1 & 15. [13.7] / [23.7] =
0.58. This means the PWM signal is 0.58 = 58%. The Blower PWM value
displayed under the Info screen (above) should match this calculated value.
Info
AFS
UV LIGHT
CANOPY
C1 - A MODE
REV. D
10 INCH
[OK/MUTE]
58
CURRENT / AVG = 1217 / 1219
NEW FILTER / MAX = 1074 / 1450
REV. D
SUPPLY
[UP] [DOWN]
Blower
PWM
Figure 13-8

Labconco Logic+ A2 Specifications

General

Brand	Labconco
Model	Logic+ A2
Category	Laboratory Equipment
Language	English