Kemo Limited

Compact 16 and 8 channel systems
Programmable Gain and Frequency
RS232 ASCII Text based Computer control
Windows™ Driver
Range of filter responses and frequencies
Programmable Gain to +58dB (x800)
Designed for portable use
DC Power input
Optional IEPE transducer supply
Systems from 0.2 Hz - 127 500 Hz

RackMaster pdf format data sheet (73 KB)

The Kemo RackMaster Series of filter systems, are compact filter amplifiers, in a range of rugged cases suitable for portable or laboratory filter/amplification tasks. The programmable systems are controlled by an RS232 text based interface, using the Kemo FICL control language. Windows drivers are available. RackMaster systems have controllable inputs, AC / DC coupling and filter bypass set by computer, and single ended / differential / IEPE inputs set by front panel switches.
Input gain is computer controlled between -6 dB (x0.25) to +58 dB (x800), to reduce noise unused channels can be grounded. Filter frequencies are available from 0.2 Hz, and are usually based on the Kemo 1600 filter modules.
RackMasters can be made in fixed or manually set versions, a number of these have been made for applications where the filter is 'hard set' in the laboratory and then taken on site pre-set with no further programming requirement.

Programmable Frequency and Gain
The RackMster uses Kemo's 1600 Series Filter Modules, offering exceptional analogue performance in a small volume. Each 1600 filter module can be programmed over a 255:1 range,1792:1 for the 1600W filter modules. Cut-off frequencies from 0.2 Hz to 255 kHz are available as standard, with others available to special order. Please contact us with your requirements.
The filter modules plug into the RackMaster, so should you wish to change filter response or frequency in the future this is possible
The RackMaster has 3 programmable gain ranges,

Gain Range	Gain Steps
0.25 - 7.75 (-12 to 17.7dB)	32 steps of x0.25
5 - 80 (14 to 38 dB)	16 steps of x 5
50 - 800 (34 to 58 dB)	16 steps of x 50

RackMasters are controlled by RS232 interface, using the Kemo FICL text based control language, or a supplied Windows driver.
FICL is a text based command set, very easy to understand and program, the filter settings can be controlled by any device with an RS232 interface. Some of our customers use PDA's to control their filters.
Programming is also very easy using the FICL commands. e.g.: FREQ 1,500 Sets filter channel 1 to 500 Hz.

The Kemo Windows driver for the RackMasters has features to aid the traceability of the measurement settings.
Once a set of commands are set to the RackMaster, the driver then interrogates each channel of the RackMaster, and saves the results as a text file. This gives a record of the actual filter settings, these files can be stored and used as part of a measurement control system.

A typical screen is shown to the left.
A table is created and then sent to the RackMaster, channels 2 and 3 have data to send, channels 5 and 6 have been sent data, which the driver corrected to suit the available filter settings, all other channels are set.