KERN & SOHN FA 6T-3M - Manual (Page 63)

Annex page 2 of 14
Certificate of EU type-approval no. DK 0199.202 rev.1
Issued by DELTA
1. Name and type of instrument and modules
The weighing instrument is designated KFN-TM / KFB-TM / BFB / IFB / SFB / UFB / UFN / NFB /
BFN / NFN. It is a system of modules consisting of an electronic indicator, connected to a separate
load receptor and peripheral equipment such as printers or other devices, as appropriate. The instru-
ment is a Class III or IIII, self-indicating weighing instrument with single-interval, multi-range or
multi-interval, an external AC mains adapter, and an internal rechargeable battery (optional).
The indicators consist of analogue to digital conversion circuitry, microprocessor control circuitry,
power supply, keyboard, non-volatile memory for storage of calibration and setup data, and a weight
display contained within a single enclosure.
The modules appear from the sections 3.1, 3.2.1 and 3.2.2; the principle of the composition of the
modules is set out in the sections 6.1 and 10.
2. Description of the construction and function
2.1 Construction
2.1.1 Indicator
The indicator is specified in section 3.1.
Enclosures and keyboard
The indicators are housed in an enclosure made of either ABS plastic (model KFB-TM / BFB / IFB /
UFB / NFB) or stainless steel (Model KFN-TM / SFB / UFN / BFN / NFN).
The front panels of the indicator comprise:
• An LCD display with appropriate state indicators and 5½ digits.
• A keyboard containing 6 keys used to enter commands or data into the weight indicator, plus a key
for turning the indicator on/off. Each key is identified with a name and/or pictograph.
Electronics
The instruments use a single printed circuit board, which contains all of the instrument circuitry. The
metrological circuitry for the models of weight indicator is identical.
All instrument calibration and metrological setup data are contained in non-volatile memory.
The power supply accepts an input voltage of 9 - 12 VDC from the external power adapter, with input
from 230 VAC 50 Hz. The indicator produces a load cell excitation voltage of 5 VDC.
2.1.2 Load receptors, load cells and load receptor supports
Set out in section 3.2.
2.1.3 Interfaces and peripheral equipment
Set out in section 4.