TESTO 0638 1345 Manuel utilisateur

Description

The pressure probe works with a differential pressure

according to the principle of a strain gauge.

Connecting the probes

The pressure inlets in the differential pressure probe are

marked with + and -. The higher pressure should be

applied to the + inlet to achieve the best possible

accurary level. Higher pressure at the + inlet produces

a positive pressure indication, while higher pressure at

the - inlet produces a negative pressure indication.

Application

Set the connected probe to its position of use before

beginning a measurement. We recommend the use of a

magnetic holding fixutre (see ordering data). Zero calibrati-

on should be carred out before the

measurement in order to guarantee reproducable measu-

rements. The position of the probe should not be altered

during the measurement that follows! Zero calibration is

not necessary for measurements with the absolute pres-

sure probe (0638.1645). The pressure probes are calibra-

ted in the factory, calibration is carried out when the pres-

sure probe is lying flat (normal position). We therefore

recommend that the probe remains in this position during

measurements.

Make sure that the pressure probe is not subject to vibra-

tions during the measurement (vibrations effect the results

of the measurement).

Handling instructions

Pressure probe

0638.1445 (±10 hPa), 0638.1545 (±100 hPa)

0638.1645 (2 bar abs)

Please read before using instrument!

Observe measuring range (max. excessive pressure), too high pressure values can dest-

roy the sensor!

Please read the appropriate instruction manual before using the instrument!

In order to obtain reproducable measurements with differential pressure probes and to

maintain the accuracy ±3Pa with the 10 hPa probe, the following should be observed:

- The probe must be adjusted to the ambient temperature before the start of the

measurement!

- Zero calibration must be carried out before beginning a measurement, the position of

the pressure probe should not be changed during the measurements that follow!

- The pressure probe can be positioned as required.

- Avoid changes in temperature during the measurement!

- Observe + and - inputs!

testo

0638.1445

1.888.610.7664sales@GlobalTestSupply.com www.Testo-Direct.com

Handling instructions

Operating temperature...............................0 to +50 °C

Storage and transport temp. ..................-20 to +70 °C

Care and maintenance

The pressure probe is maintenance-free and is not

subject to a particular maintenance interval.

Clean the housing with a damp cloth.

Ordering data

Pressure sensor ±100 Pa ............................0638.1345

Pressure sensor ±10 hPa ............................0638.1445

Pressure sensor ±100 hPa ..........................0638.1545

Pressure probe 2bar abs .............................0638.1645

Magnetic holding fixture...............................0554.0225

Silicone hose ...............................................0554.0440

Warranty

Pressure probe ............................................24 months

If the instrument is opened, improperly handled or

if force is applied, no warranty will be granted!

testo

0638.1445

testo

0638.1645

Probe Meas.range Zero t.c. value Accuracy Max.

during long-term meas. * overload

0638.1345 ± 100 Pa ± (0.3 Pa + 0.5% of m.v.) 100 hPa

0638.1445 ±10 hPa type 0.3% of f.v./°C ± 3 Pa 50 hPa

in range >10°C to 50°C

type 1% of f.v./°C

in range 0°C to 10°C

0638.1545 ± 100 hPa type 0.1% of f.v./°C ± 10 Pa (0 to 20 hPa) 200 hPa

± 0.5% of m.v.

(20 to 100 hPa)

0638.1645 2 bar type 0,05% of f.v./°C ± 5 hPa 3200 hPa

in range 0°C to 20°C

Strong detergents or solvents should

never be used for cleaning the measuring

probe! Make sure that no liquid gets into the connec-

tion nipple!

0973.2710/0402/T/wh/13.04.2004

Technical data

* unimportend if constant tempered and

reset before each measurement.

1.888.610.7664sales@GlobalTestSupply.com www.Testo-Direct.com

Ce manuel convient aux modèles suivants

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