Introduction; Operation; Getting Started - Amprobe TMA-20HW User Manual

INTRODUCTION

The TMA-20HW Portable Air Velocity Meter is a lightweight instrument
that can be used anywhere to measure air velocity. The meter uses a
snake telescoping probe with a special sensor to accurately measure air
velocity in different applications such as hood velocity, clean rooms, OSHA
compliance, ventilation ducts and outlets, heating and air – conditioning,
wind tunnels, product development, air – flow research and mass – flow
measurement in ducts.

OPERATION

Getting Started

1. Installing the Batteries
Insert (6) AAA batteries as indicated by the diagram located on the inside of
the battery compartment.
2. Extending the Probe
To extend the probe, hold the handle in one hand while pulling on the probe
tip with the other hand. Do not hold the cable while extending the probe as
this prevents the probe from extending.
3. Using the Snake Telescoping Probe
The snake telescoping probe contains the air velocity sensor. When using the
probe, remove the sensor protection cap then rotate or bend the snake tube,
make sure the sensor window is fully exposed and the orientation is facing
upstream.
� If in the right direction, the user will see the red-ink marking as following
figure.
4. Retracting the Probe
To retract the probe, hold the handle in one hand while pushing on the probe
tip with the other hand. If you feel the probe antenna binding, pull gently on
the probe snake tube until the snake tube section is retracted. Collapse the
rest of the antenna by pushing the probe tip.
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