DRUCK TEMPERATUR
&
Leitenberger GmbH •
Bahnhofstr. 33 • D-72138 Kirchentellinsfurt • GERMANY
Tel. +49 (0) 7121-90920-0 • Fax +49 (0) 7121-90920-99 • [email protected] •
DT
www.druck-temperatur.de
MANUAL
TLDMM
Referezdruckmessgerät
2.0
TLDMM
reference pressure gauge
2.0
42
For informa on on returning the instrument, see chapter 9.2 „Return“.
8. Recalibra on
WARNING!
The following procederes are described by way of documenta on only, but it
shall be performed by authorised calibra on centres only and in case of real
need.
DRUCK & TEMPERATUR Leitenberger GmbH declines any responsibility for measurement errors or
bad func oning which should be caused by adjustments performed not properly. In this case, the
validity of cer fica ons would loose.
8.1 Recalibra on of Gauge Pressure and Compound Ranges
The instrument is supplied calibrated, but if a calibra on devia on is no ced over me during the
periodic calibra on, 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: posi ve gain for the PRESSURE
TLDMM
LR-
2.0
Cal
measurements and the nega ve gain for the VACUUM measurements. If your instrument does not
offer vacuum measurements, enter the „pressure“ gain value also as the „vacuum“ gain.
The correc on mus be performed by evalua ng 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
correc ons.
Example:
The
has a pressure range 0...5 bar. The reference indicates exactly 5.0000 bar
TLDMM
LR-
2.0
Cal
while your
indicates 5.0010 bar. Calculate the gain factor using this formula:
TLDMM
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
and confirm with SET key.
8888
GAInP
Posi ve gain for the PRESSURE. Modify the value with arrow-keys,
confirm with SET key.
REFERENCE pressure
MEASURED pressure
5.0000
5.0010