11
8015383/ZUQ7/V1-3/2020-06 | SICK
O P E R A T I N G I N S T R U C T I O N S | TRANSIC151LP
Subject to change without notice
PRODUCT DESCRIPTION
2
2
Product description
2.1
Product identification
Type plate
The type plate is located
on the outer left hand side of the enclosure.
The type plate contains the type code.
2.2
Functional principle/measuring principle
The TRANSIC151LP functions using light absorption of a tunable diode laser (Tunable
Diode Laser Absorption Spectroscopy TDLAS). The gas concentration is measured using
the damping of a laser beam sent from a tunable diode laser source in the gas sample. For
oxygen measuring, the laser beam wavelength is set to match one of the characteristic
absorption lines of oxygen in the wavelength range of around 760 nm in the near infrared
range (NIR) of the electromagnetic spectrum. During measurement, the diode laser beam
wavelength is continuously modulated to scan across one of the oxygen absorption lines.
This generates a periodic signal in a photodetector, the amplitude of which is proportional
to the amount of oxygen in the laser beam path.
2.2.1
TRANSIC151LP probe design
The sensor is designed as a probe for direct fitting at the measuring location. The diode
laser light source, and the photodetector that measures the light, are located in a
transmitter behind a protective window. The light is directed onto the photodetector using a
focusing mirror at the far end of the probe.
Fig. 1:
Probe design and laser beam guidance within the probe
Further information on components having contact with the sample gas probe,
.
Product name:
TRANSIC151LP
Manufacturer:
SICK AG
Erwin-Sick-Str. 1 · D-79183 Waldkirch · Germany
CAUTION:
Observe marking for special operating conditions
Special operating conditions: Marking
“X” on the TSA151 type plate means the 24V
input of the TSA151 is specified with a fault voltage of Um=60V and therefore an
appropriate PELV power supply unit is mandatory.
▸
Observe
“Special local conditions”, page 10
The complete type code Table can be found in the Annex,
The dust load in the process does not falsify the measured O
2
value.
The TRANSIC151LP outputs a maintenance signal when the dust load is too high.
1 = Light source
2 = Mirror
3 = Photodetector
