KERN & SOHN TG 1250-0.1FN - Manual (Page 4)

Sauter GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [email protected] Tel: +49-[0]7433- 9933-199
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Instruction Manual
TF / TG
TF_TG-BA-e-1311 4
depend on the number of measurements taken and
how abrasive the coating is. Replacement of the sen-
sor should only be performed by qualified staff.
13. Restore factory settings
13.1 In the following cases it is recommended to restore
factory settings:
A. The instrument does not measure any more.
B. Measurement accuracy is degraded caused by the
abraded sensor or affected by environmental
conditions.
C. After the replacement of a new sensor.
13.2 How to restore?
`F` setting and `N` setting are to be done. It can be
done one or both of them. The procedure is as follows:
13.2.1 On the display the symbol `F` or `NF` appears.
If `F` is shown on the display, you have to restore factory
settings for `F`, as described below.
If `NF` appears, you have to follow factory settings for
`NF`.
13.2.2 The Power-on/ Power-off key 3-3 has to be pressed
until `CAL` appears on the display. This lasts about 12
seconds from starting pressing the Power-key.
13.2.3 If now F:H or NF:H is shown on the display, the
sensor has to be lifted for more than 5 cm. Then the Zero-
key has to be pressed and the instrument returns into
measurement mode. With this, factory setting is restored.
Comment: This procedure should always be done within 6
seconds. Otherwise it will be automatically cancelled and
the restoration is invalid.
14. Notes
14.1 All settings, including restoring factory setting, unit
setting, S/C setting should be done within 6 seconds.
Otherwise the instrument will quit and keep the status as
before.
14.2 The linearization of the instrument, which is given by
the calibration, can be changed with the Ln- function.
Any adjustment of the value of Ln will seriously affect
the accuracy. This value should only be adjusted by
professional persons.
Generally said:
The bigger the value of Ln, the smaller the reading on
the display for the same (coating) thickness. Only a small
change on the value of Ln causes a big change in the
reading of the upper measurement range
(at 500µm/20 mil).
The value of Ln is to adjust as follows:
Pressing the Power-key. It lasts about 14 seconds from
starting depressing this key. This value can be changed by
pressing the Plus- / Minus- key after `Ln` appears on the
display and the Power- key is released. This value is
stored and afterwards the Zero- key has to be pressed.
A. The reading at low end is to be adjusted by pressing
the Plus-/ or the Minus- key.
B. The value of Ln is enlarged if reading at low end
(e.g. 51µm) is o.k., but reading at high end (e.g.
432µm) is too large.
In contrast with this the value of Ln is to be decreased
if the reading at low end (e.g. 51µm) is o.k. but at high
end (e.g. 432µm) it is too small.
C. Procedures from A to B are to be repeated until the
reading for every calibration foil is satisfactory in
its accuracy
15. Declaration of conformity