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DRUCK
TEMPERATUR
&
Leitenberger GmbH •
Bahnhofstr. 33 • D-72138 Kirchentellinsfurt •
Tel. +49 (0) 7121-90920-0 • Fax +49 (0) 7121-90920-99 •
• www.druck-temperatur.de
GERMANY
DT
www.
-Cal.net
LR
MANUAL
TLDMM
Referezdruckmessgerät
TLDMM
reference pressure gauge
2.0
2.0
44
9. Recalibraon
WARNING!
The following procederes are described by way of documentaon only, but it
shall be performed by authorised calibraon centres only and in case of real
need.
DRUCK & TEMPERATUR Leitenberger GmbH declines any responsibility for measurement errors
or bad funconing which should be caused by adjustments performed not properly. In this case,
the validity of cerficaons would loose.
9.1 Recalibraon of Gauge Pressure and Compound Ranges
The instrument is supplied calibrated, but if a calibraon deviaon is noced over me during
the periodic calibraon, it is possible to correct the reading error. The reading error is adjusted
by modifying the gain factor (default: 1.0000).
If the reading is higher than the reference, the gain factor mus be reduced.
If the reading is lower than the reference, the gain factor must be increased.
The
manages two independend gains: posive gain for the PRESSURE
measurements and the negave gain for the VACUUM measurements. If your instrument does
not offer vacuum measurements, enter the „pressure“ gain value also as the „vacuum“ gain.
TLDMM
LR-
2.0
Cal
The correcon mus be performed by evaluang the reading error on a pressure
higher than 75% of the full scale value, measured by a reference sample with
uncertainty below 0.020%, e.g. a deadweight tester, considering all necessary
correcons.
Example:
The
has a pressure range 0...5 bar. The reference indicates exactly 5.0000 bar
while your
indicates 5.0010 bar. Calculate the gain factor using this formula:
TLDMM
TLDMM
LR-
2.0
Cal
LR-
2.0
Cal
Gain = ------------------------------- = --------------- = 0.9998
Programmable gain value: from 0.7500 to 1.500
To reset the gain to the factory value, set the value to 1.0000.
Press the keys SET and PEAK simultaneously for a few seconds.
P00000
Via arrow-keys, set the password 8888 and confirm with SET key.
GAInP
Posive gain for the PRESSURE. Modify the value with arrow-keys,
confirm with SET key.
GAInn
Negave gain for the VACUUM. Modify the value with arrow-keys,
confirm with SET key. If your instrument has no compound range,
enter same value as for pressure.
End
End of the procedure
REFERENCE pressure
MEASURED pressure
5.0000
5.0010