KERN KFE-TM Operating And Installation Instructions page 52

1. Name and type of instrument
The indicators KFA-TM / KFE-TM / KFC-TM are a family of weighing indicators suitable to be in ­
corporated in a non-automatic weighing instruments, class III or class IIII, single-interval, dual-range
or dual-interval.
2. Description of the construction and function
2.1 Construction
The electronic indicator consists of a single circuit board, SMD populated on both sides as the A/D-
interface circuits, the microprocessor and the voltage regulation are placed on one side and the LCD
display on the other side.
The LCD-display has indication for: stable, zero, gross, net, tare, and weight unit (kg, g, t), and 6 dig­
its with a height of 22 mm.
The enclosure is made of stainless steel for the KFE-TM indicator or of ABS plastics for the KFA­
TM and KFC-TM indicators.
The front of the enclosure has an on/off key plus 5 keys for operating the functions of the indicator.
All instrument calibration and metrological setup data are stored in the non-volatile memory.
The indicators are power supplied with 9-12 VDC - normally supplied by external 230 VAC to
12 VDC adapter. An optional internal battery can be factory installed.
Software
The software version is displayed during the start-up of the indicator.
The tested software version is 1.00.
Sealing
The configuration and calibration data can only be changed if the calibration jumper is installed on
the circuit board.
2.2 Function
The devices are a microprocessor based electronic weighing indicators for connection of strain gauge
load cells.
List of devices:
•
Self-test
•
Determination and indication of stable equilibrium
•
Initial zero-setting ± 10 % of Max
•
Semi-automatic zero-setting ± 2 % of Max
•
Automatic zero-tracking ± 2 % of Max
•
Indication of zero
•
Semi-automatic subtractive tare
•
Check-weighing
Issued by DELTA
Annex to Test Certificate No. DK0199-R76-11.10
Annex page 1 of 7