Page 5 of 16
AT400 User Manual
Rev 2.0
Jan. 05
-201
7
DANGER
Never touch the vane assembly blades and/or thermal sensors.
The vane assembly blades may contain sharp edges which may cause minor
cuts. The assembly contains precision bearings which are sensitive and the
blades are finely adjusted to specific pitches. Touching this assembly or its parts
may cause damage which can affect its operation and the calibration.
NOTE: If the vane assembly head or probe head requires cleaning we
recommend a fine mist of isopropyl alcohol and a fine long-haired brush or send
the unit in or servicing.
Do not touch the circuit board when 120/220VAC is or has been
applied. Only connect 120/220VAC wires to the unit with power
disconnected. Double-check to make sure the wires are in the correct
terminals before applying power.
Power may still be present after voltage has been removed via storage in the
capacitors. Only authorized repairs can be accomplished after proper
discharging of the circuits.
CAUTION
When measuring, ensure that the direction arrow is facing the
direction of airflow.
The arrow indicates the direction of airflow for the data provided on the calibration
certificate. It is meant to allow for uniform and consistent readings as per the provided
data. The probe will operate in the opposite direction but the data may be different.
The transmitter case is designed to protect against dust and powerful
water jet penetration (IP 66), when properly closed.
2
Do not over-tighten the cover screws, only secure snugly. Over-tightening may cause
cover warping and damage. Only insert round, appropriate sized cables into the Liquid
Tight Cord Grips. Use of non-round, double cables/wires, or too small cabling may
reduce the IP rating and cause damage.
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