DRUCK & TEMPERATUR Leitenberger GmbH •
Bahnhofstr. 33 • D-72138 Kirchentellinsfurt • GERMANY
Tel. +49 (0) 7121-90920-0 • Fax +49 (0) 7121-90920-99 • [email protected] •
• www.druck-temperatur.de
www.LR-Cal.net
MANUAL
Portable Temperature Calibraon Bath
FLUID 100 and FLUID 100-N
35
10. Recalibraon of the
temperature calibrator
LR-
Cal
CAUTION: This secon is applicable for authorised personnel only. Personnel must be able to
operate the calibrator and must be familiar with the menu item selecon etc. Deep knowledge
about calibraon of temperature instruments is necessary.
The temperature calibrator can have a complete or paral re-calibraon yearly or when chosen by
the user. Calibraon can be carried out using the oponal CALIBRA ED200 soware or directly on
the keyboard of the temperature calibrator.
The calibraon of the internal probe is done by adjusng the internal probe at two points of the
range, using a precision reference thermometer, such as model
.
LRT 750
LR-
Cal
Only for
versions of the
temperature calibrators with 2 measuring inputs:
-2I
LR-
Cal
The calibraon of the „EXT“ and „REF“ inputs is done by adjusng the inputs of the controller at
two points of the range using a mV/ohm generator, such as models
or
LTC 100
LR-
Cal
LR-
Cal
LEC 200
.
A calibraon of the calibrator is only possible if the calibrator is set to °C as temperature unit.
10.1 Calibraon of the internal probe:
The purpose of recalibraon is to correct the error between the temperature indicated and the
value of a precision reference thermometer.
To calibrate the interal probe of the temperature calibrator, it is necessary to have a standard
thermometer with precision greater than that of the temperature calibrator, and then to follow the
instrucons:
• Insert the probe of the precision reference thermometer in the temperature bath or in the most
suitable hole of the dry block.
• Choose two calibraon points depending on the calibrator‘s range or the field where you wish
to carry out calibraons.
• Set the first calibraon point and wait for the calibrator to be stable (see symbol ).
¸
• Enter the 3. Funcon Menu Level and select „Cal_chnl=INT“. Press „E“-key to confirm.
• Press „F“-key to select „P1", press the arrow-keys to set the value read with the precision
reference thermometer and press „E“-key to confirm. Confirmaon is indicated by the symbol
„*“ which appears on the display aer about 5 seconds.
• Return to the 1. Funcon Menu Level and set the second set point. Then wait for the calibrator
to be stable (indicated by „ “ on the display).
¸
• Enter the 3. Funcon Menu level and select „P2", press the arrow-keys to set the value read
with the precision reference thermometer and press „E“-key to confirm. Confirmaon is
indicated by the symbol „*“ which appears on the display aer about 5 seconds.
• Select „CAL: INT“, set „Y“ (yes) and confirm by pressing the „E“-key. The calibraon begins.
The procedure takes a few seconds, at the end of which there is a audible signal „beep“.
