TSI Velometer Jr OPERATION AND SERVICE MANUAL

OWNER’S MANUAL

Velometer® Jr.

®

A TSI Company

®

TABLE OF CONTENTS

Features 2

Zero Adjustment 2
Range Change 2

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Alnor Type 8125 AirGard

Step by Step Calibration Instructions 4
Maintenance 5
Service Information 5

Service and Repair 5

Instructions for Return 6

Damaged in Transit 6

Velometer Jr. 3

1

FEATURES

The Alnor Velometer Jr. is a direct reading air velocity measuring
instrument.

This precision instrument is ruggedly built and will serve for
many years if given reasonable care.

You can use this instrument to measure air velocities from grilles
and registers and to locate drafts. Balancing of a domestic heating
installation is made simple when using the Alnor Velometer Jr.

Hold the instrument so the air blows directly into the calibrated
orifice and read the velocity as indicated by the pointer.

Zero Adjustment

Hold the palm of your hands over the two openings in the sides
of the Velometer Jr. and note whether the pointer indicates Zero.
If not, turn the Zero Adjuster screw on the front of the case
slightly until the pointer does read zero. (See fig. 1)

Orifice Fitting

Zero Adjuster

Figure 1

Range Change

Change range by turning orifice fitting on double range instruments.
(Small orifice for high range—large orifice for low range.) (See fig.1)

2