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As a policy of continual improvement, RMF reserves the right to alter the specification without prior notice.
201.028 REV 1
Date of Issue: 18 June 2018
4 Product Presentation
The CMS measures and quantifies the numbers of solid contaminants in Hydraulic, Lubrication and Transmission
applications. The CMS-M is designed to be an accurate instrument for permanently installed applications utilising
mineral oil as the operating fluid. Other fluid media versions are available for offshore [N] and aerospace
phosphate ester [S] applications.
The unit can operate using any of the international standard formats ISO 4406:1999, NAS 1638, AS 4059E/F and
ISO 11218.
The CMS incorporates a machine connector for power and PLC connection, capable of RS485, CANBUS or 4-20mA
signaling. A separate connector is also provided for simultaneous computer remote monitoring or settings access
using RS485 or a USB:RS485 interface.
The integrated data logger records up to 4000 test results internally, for use where a computer cannot be
permanently connected.
Simple switched inputs and alarm outputs are provided as alternative means of controlling the testing and
signaling the results. The "full colour’’ front panel led provides a basic indication of the cleanliness level.
The instrument uses the light extinction principle whereby a specially collimated precision LED light source shines
through the fluid and lands on a photodiode. When a particle passes through the beam it reduces the amount of
light received by the diode, and from this change in condition, the size of the particle can be deduced.
4.1 Benefits
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Live real time monitoring
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Manual, automatic and remote control flexibility
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Moisture and temperature sensing
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Multicolour LCD and LED for clear visual indication of any faults and alarms
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Instant result download on USB versions
4.2 Product features
4.2.1 Moisture Sensor
CMS-W models measure water content using a capacitive RH (relative humidity) sensor. The result is expressed as
percentage saturation. 100% RH corresponds to the point at which free water exists in the fluid, i.e. the fluid is no
longer able to hold the water in a dissolved solution. This is also normally the point at which damage occurs in a
hydraulic system, so is an ideal measurement scale that is independent of the fluid characteristics.
The water saturation point (100% RH) is temperature dependent, so the temperature is measured at the same
time. This enables results to be compared meaningfully.
The temperature measured is that of the fluid passing through the unit. Note this may differ from that of the
hydraulic system, depending on flow rate, pipe length and ambient temperature. It is not intended to be an
accurate indication of system temperature, but to provide a reference for the RH measurement. Nevertheless
experience has shown the temperature measured is within a few degrees of that of the hydraulic system, in most
applications.
Содержание CMS 2
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