8
System adjustment
The system adjustment of testo 735-2 offers precise measurement resultsat critical temperature points. Due to a system calibration, the testo 735-2
including probe, can be adjusted at up to six user-defined temperature
points across the entire measurement range. The adjustment takes place
in the course of an ISO or DKD calibration by the Testo calibration
laboratory Testo industrial services, or can be carried out individually by
the user via an optional adjustment software.This results in the following advantages.V Very a accurate m measurements a at c critical t temperature p points Customers appreciate the broad measurement range of thermocoupleprobes, however they are often dissatisfied with the accuracy according
to EN. Thanks to a system adjustment on the testo 735-2, system
deviations up to the accuracy of the reference system can be achieved
even with
thermocouples!In the course of a DKD calibration of thermocouple probes and testo 735-2 by the Testo calibration laboratory, deviations from 0.2 K from the
reference value can be achieved after adjustment has taken place. Manipulation -p proof The adjustment data stored in the testo 735-2 and the probe identification
cannot be manipulated in the instrument. An alteration or update of the
data is carried out by the Testo calibration laboratory in the course of a
new system adjustment, or can be done by the user with the optional
adjustment software. Flexible h handling Up to 6 probes can be operated simultaneously from the testo 735-2:- 2 plug-in thermocouple probes
- 1 plug-in
Pt100 probe
- 3 wireless probes: Option of thermocouple and NTC probesThe complete range of probes of the testo 735-2 can be adjusted to the
testo 735-2. This allows flexible handling. Assurance i in m measurement Probes with stored adjustment data are identified with “adj.” in the
instrument’s display. This allows the user to see immediately in which
channels adjustment data are stored. This clear referencing provides
assurance in measurement. Traceability o of t the a adjustment The adjustment data recorded and the probe identifiaction (e.g. the
number of the calibration certificate) are stored in the hand instrument. If a
thermocouple probe is adjusted to the testo 735-2 on channel 3, for
example, the recorded adjustment data are stored in channel 3 of the
hand instrument.The adjustment data and the probe identification can be viewed in testo735-2 at any time, and can be matched with the corresponding calibration
certificates and connected probes. This guarantees the traceability of the
data. The adjustment data stored in the testo 735-2, the probe
identification and the date of the adjustment can be printed out on site
with the optional Testo report printer.
Adjustment by theTesto calibration laboratory
Precision over the entire measurement rangedue to system adjustment
The adjustment takes place on request in the course of a DKD or ISOcalibration in the Testo calibration laboratory. You select the temperature
points at which the measurement system (probe and instrument) is to be
adjusted. You have the option of a two-point or a four-point adjustment.
The ISO/DKD certificate documents the system accuracy recorded,
including certificate number, date of adjustment and the instrument and
probe serial numbers. The certificate number and the adjustment data are
stored in the hand instrument. They can be viewed there at any time. This
guarantees the traceability of the data. Example of system deviation before and after adjustment with a TC probe. Accuracy probe0602 1293, TC
class 2TemperatureDeviation testo735-2±2.5 °C+60 °C±3.0 °C+400 °C±0.3 °C±1.4 °CSystem deviation from the reference value after System accuracybefor e adjustment adjustment by Testo industrial services ±2.8 °C±4.4 °C from 0.2 Kfrom 0.4 K Example of system deviation before and after adjustment with a Pt100 probe. Deviation probe0609 1273, Pt100TemperatureDeviation testo735-2±0.27 °C+60 °C±0.95 °C+400 °C±0.3 °C±1.4 °CSystem deviation from the reference value after System accuracybefor e adjustment adjustment by Testo industrial services ±0.57 °C±2.34 °C from 0.02 Kfrom 0.03 K
Temperature