MU-616

Passport-confirmed operating parameters

The MU-616 passport confirms a working angle of ±30±2° and full wiper travel of ±60±2°. Measurement error under normal conditions is not more than ±1.5% of the complete working range, and calibration-characteristic non-linearity is not more than ±2%. Supply voltage is 6±0.5 V DC. Resistance of each potentiometer is specified as 700±200 Ω. Starting torque is 70–150 gf·cm and product mass is 0.15±0.01 kg.

The operating-temperature range is −60 to +150 °C. The sensor remains operational continuously at +150 °C and for 10 minutes at +200 °C. The passport also confirms vibration resistance from 5 to 300 Hz with displacement amplitude not exceeding 1 mm and vibration acceleration up to 5 g. The contained-material table identifies 0.308 g of gold, 0.130 g of silver and 0.978 g of palladium.

These values form one identification set for the base MU-616. A matching housing or working angle does not confirm an identical electrical execution. Incoming inspection should compare the 6 V supply, resistance of both potentiometers, temperature limit, mass, cable condition and body marking with the passport for the individual unit. If any parameter differs, the sensor should not be assigned for installation from a photograph alone.

Potentiometric channels and inspection

When the shaft rotates, contacts in the two potentiometers move along their resistive tracks and produce signals corresponding to the angular position. Two channels allow the connected system to obtain parallel values and identify disagreement. Inspection before installation should cover smooth movement, binding and excessive play, progressive output from both channels, resistance, braided cable condition, plug condition, seals and mounting hardware.

Mechanical adjustment must preserve the neutral position, working range and permitted full travel. Visual similarity between MU-616 and the Series 1 execution does not establish identical supply voltage, potentiometer resistance or interchangeability. Any replacement requires confirmation of the complete designation, passport, technical specification and wiring diagram.

Installation checks should also confirm that the driven mechanism cannot move the wiper beyond the full ±60±2° travel and that the operating sector corresponds to the documented ±30±2°. The cable must not impose extra torque on the shaft or contact moving parts. After installation, both channels are checked through the working range against the aircraft wiring and maintenance data. These are installation-control considerations and do not authorize adjustment without approved repair documentation.

Application and installation verification

This product is listed in the Mi-8/Mi-17 monitoring and auxiliary equipment category. The supplied passport itself does not identify a particular aircraft type, so exact MU-616 applicability must be confirmed from the illustrated parts catalogue, system diagram and maintenance documentation for the aircraft concerned. An enquiry should identify the required execution, connector, cable-assembly length, condition and passport requirement.

MU-616 photographs and related products

The additional gallery photographs show MU-616 and MU-616 Series 1 together with their cable assemblies, connectors and potentiometer units. They support comparison of marking and construction but are not evidence of interchangeability. Related products include MU-616 Series 1, MU-615A Series 1, MU-615A, MP-95 ±1.5. Each item must be selected by its own designation and approved documentation.