American Magnetics 185 & 186 Liquid Level Instruments (CE-Marked) - Manual (Page 23)

Rev. 3 13
Installation
Interconnects with oscillator and valve
2.4 Connecting the Oscillator Cable to the AMI Sensor
Connect the oscillator to the sensor using a supplied 6 foot RG-59/U
coaxial cable. Ensure the oscillator is connected in the correct orientation
(see page 7 for a system diagram). The cable length between the oscillator
and the sensor should not exceed 6 feet unless longer lengths were
discussed with an Authorized AMI Technical Representative.
Caution
Moisture or contaminants in any of the BNC coaxial connectors can
short out the sensor and cause a false ‘full’ level indication or other
erroneous readings. A pack of non-conductive electrical connection
lubricant (ECL or “Dielectric Tune-up Grease”) has been included
with the liquid level sensor packaging to reduce the possibility of
this occurring. If desired, apply a small amount of ECL to any of the
BNC connectors that may be exposed to moisture. Mate the doped
connectors then remove any excess ECL from the outside of the
connector. Added protection can be achieved by covering the doped
connections with a short section of heat-shrink tubing.
Note: MSDS sheets for the ECL are available upon request.
2.5 Connecting the Instrument to the Oscillator
Caution
Operation of the AMI Model 185/186 Liquid Level Instrument with
a device other than an AMI Liquid Level Sensor may void the
instrument warranty.
Using the J5 coaxial connector, connect the instrument to the oscillator
using a RG-59/U coaxial cable. The length of the extension cable can be
varied to suit the specific application. AMI has confirmed proper operation
for up to 500 feet of coaxial cabling between the instrument and oscillator.