RH350/355 V2.1 8/08

2

Introduction

Congratulations on your purchase of the Extech RH350 SuperHeat Psychrometer. This

device

measures

Differential

Temperature

(T1-T2,

Air-T1,

T1-DP),

Humidity,

Air

Temperature, Dew Point and Wet Bulb. Advanced features include built-in memory and

recall of up to 99 data points, Min/MAX/Average readings from the captured data, Data

Hold, selectable Auto Power Off, and an RS-232 interface for capturing readings to a PC

using optional 407752 software. Careful use of this meter will provide years of reliable

service.

Meter Description

1.

Humidity Sensor & Air Temperature Sensor

2.

Triple LCD Display

3.

On/Off; Set Mode

4.

Min/Max/Average; Reset Min/Max

5.

Air, T1, Air-T1, Dew Point

6.

T1 probe input

7.

T2 probe input

8.

T1-T2, T2, T1-Dew Point, Wet Bulb

9.

Store Current Reading; Backlight

10. Hold; Recall Mode

11. RS232 port

Note: The battery compartment is located

on the rear of the instrument

Display Description

1.

Air, T1, Air-T1, Dew Point, Low Battery

2.

Temperature °C/°F

3.

T2, T1-T2, T1-Dew Point, Wet Bulb

4.

Temperature °C/°F

5.

Date (month, day, year), Time (24 hour clock)

6.

Memory Store/Recall Location

7.

Relative Humidity %

8.

Maximum, Minimum

9.

Hold, Average

1

2

3

4

5

6

7

8

9