Maintenance - Siemens milltronics MFA 4P Instruction Manual

c.To find out if the probe is defective (non-IMA type only; i.e. MSP-1 , MSP-3, and
MSP-9 ):
i. Disconnect probe from pre-amp.
ii. Connect an ohmmeter across the black and white leads.
iii. Nominal probe impedances are as follows
MSP-1
MSP- 3 and MSP- 9
If impedance deviates substantially from these values, an open or short circuit condition
is indicated.

Maintenance

The Motion Failure Alarm MFA 4p requires no maintenance: however, we recommend a
program of periodic checks.
If it is necessary to clean the enclosure and circuit boards:
1. First, make sure the power is disconnected at the main breaker.
2. Use a vacuum cleaner and a clean, dry paint brush.
3. Check all electrical contacts for corrosion and arcing.
It is a good idea to periodically check the face of the probe: it should be free of material
build-up, corrosion or deformation.
7ML19985FM01
115 ohms
750 ohms
MFA 4p - INSTRUCTION MANUAL Page 29