UEi DTH31 User Manual

INSTRUCTION MANUAL

DTH31

Digital Psychrometer

1-800-547-5740 • Fax: [phone]

www.ueitest.com • email: [e-mail]

Introduction

The DTH31 Digital Psychrometer is an advanced handheld humidity and

emperature meter. Its triple display shows three parameter readings

t

imultaneously and includes a second temperature probe for external

s
measurements. It has everything you need to charge an air-conditioning
system and determine heating, cooling, and ventilation needs. It gives
you incredible fast and accurate wet bulb, dry bulb, and dew point

easurements. Nothing compares to this fully featured, hand-size

m
digital psychrometer.

4. ∆T/WB: Switch between ∆T, WB and T2.

T2 (∆T=T2-DP, T2=External Temp.)

˚C/˚F) - Centigrade/Fahrenheit:Toggles between these two

5.(
tandard scales.

s

.

6

N/MX:

M

RESET

• Reset MIN/MAX memory

• Display minimum value of memory

• Display maximum value of memory

Features include

• Triple display, RH, dry bulb and wet bulb temp.

• C/F selectable

• Turnable cap to protect sensor

• T2-Air temp. and T2-Dew Point

• Data hold

• MIN/MAX

• Automatic power off

Safety Notes

Before using this instrument, read all safety information carefully. In
this manual the word "WARNING" is used to indicate conditions
or actions that may pose physical hazards to the user. The word
"CAUTION" is used to indicate conditions or actions that may
damage this instrument.

Controls and Indicators

Buttons

LCD Display

1

2

3

4

1. RH%

2. Air Temperature (T1)

External

robe Port

P

5

6

7

1

3

5

2

4

6

1. ON/OFF - “ “ : Turns unit on and off.

2. Hold - Data Hold: Freezes data input.

• “HLD” appears in upper right corner of display

• View frozen data for any of these functions: C/F, Td/WBT, MIN/MAX

T

E

S

• Cancel hold by pressing “R

E

”

• “ “ + HOLD = non-sleep mode (default setting is auto-sleep
in 5 minutes)

3.

∆T/DP : Switch between ∆T, DP and T1.

T1 (

∆T=T1-T2, T1=Air T

emp.)

3. T1 - T2*

4. Dew Point

5. External Temperature (T2)*

6. T2 - DP*

et Bulb

7.W

*Not available without external probe connected.

DTH31-MAN

P. 1