Siemens milltronics MFA 4P User Manual

Service and maintenance
5.1 Calibration
Milltronics MFA 4p
22 Operating Instructions, 08/2017, A5E33988839_AB
Overspeed
1. Set switch
SW3
to
Overspeed
.
2. Set
ppm
switch
SW2
to
X 1
position.
3. Set
ppm
potentiometer fully
CCW
to
0
.
4. Determine incoming pulse rate by slowly turning
ppm
potentiometer
CW
until Relay LED
2 goes on. Because the MFA 4p requires 2 pulses within range before energizing relays,
low
ppm
applications (e.g.
2 ppm
) may require stepping of potentiometer at appropriate
time intervals.
5. If no response is obtained when you set the
ppm
potentiometer to
3
, (below this stability
suffers), reset potentiometer fully
CCW
and set switch
SW2
to
X 10
, and then
X 1
if
required, and repeat step 4.
6. When Relay LED 2 goes on, indicating the incoming pulse rate, turn potentiometer
CW
slightly past this point to obtain an operating setpoint that allows for normal fluctuations
due to load and voltage variations.
Note
If N.O. contacts were shorted as described in final note of calibration preamble, remove them
now as calibration is complete.

Siemens milltronics MFA 4P Specifications

General

Brand	Siemens
Model	milltronics MFA 4P
Category	Security System
Language	English