SDT International SDT170, Руководство пользователя

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20. External non ultrasonic sensors
MAN.170.EN--04--SDT170-user-manual-Eng.docx 109/141
These functions can be very useful for determining peak values while
scanning a surface or measuring a moving object (response time: 150 ms).

AVG (average): used to increase the accuracy when measuring a
temperature which changes over time. The value displayed is the mean value
calculated from the measurements taken over the last four seconds.

DIF : indicates the difference between the initial reading (last trigger action)
and the current measurement.

HI and LO : acoustic alarms. They can be adjusted, in 1 °C (34 °F) steps
through the entire measuring range. If the current value is lower than the set
«LO» threshold or higher than the set «HI» threshold, the pyrometer emits a
beeping sound.

CLR, STO, RCL, INT : not active functions. The recording and processing of
readings can be done in the SDT 170 unit and/or using the SDT
DATAMANAGER software on a PC.

C/F : switch the unit from °C to °F on the pyrometer display. Readings can
also be displayed in °K and °R on the SDT 170 screen (see paragraph «With
a thermometer» on page 57).
Low battery
A low battery will indicated by this flashing symbol in the top left corner of
the pyrometer display.
20.5 M
ASS AIR FLOW SENSOR
Main applications
Fitted with a tip made of flexible rubber, this sensor allows to measure the flow
(sccm/scfm) of a compressed air leak. For an accurate measurement, the nozzle
must be set so that all the air leakage goes trough the sensor. The leak measuring
range is between -75 till +1 000 SCCM (2.5 x 10
-3
till 3.5 x 10
-3
SCFM).
Description
This is a thermal based Mass Flow Sensor fitted with an incorporated conditioning
and temperature compensation electronics.
The flow rate can be readout in either SCCM (Standard Cubic Centimeters per
Minute) or in SCFM (Standard Cubic Feet per Minute).