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Main Functional Flow Chart

Additional Function Flow Chart

Custom LCD Display Of RH511 General

Operation

In order to install the 6 AA size batteries, remove the 

yellow rubber boot, and unscrew the battery door with 

the case to get to the battery compartment. 
After installing the batteries, close the battery door, and 

put back on the rubber boot.  If the unit comes with a 

wired temperature/RH probe, connect the probe to the 

meter. The connection is at the bottom of the unit. The 

probe can be attached to the meter via the probe holder 

on the side.
Press the Power button 

 to turn on the unit. The 

display will show the relative humidity, ambient 

temperature, and the no-contact infrared temperature. 

Keypad Flow Chart

ARTWORK/PRODUCT ART/

 DWGS/START HERE ARROW

START HERE

ARTWORK/PRODUCT ART/

 DWGS/START HERE ARROW

2

ARTWORK/PRODUCT ART/

 DWGS/START HERE ARROW

3

ARTWORK/PRODUCT ART/

 DWGS/START HERE ARROW

4

Using This Quick Start Manual

Use this Quick Start Manual with your RH511 

handheld/benchtop meter for quick setup and 

basic operation. For detailed information, refer to 

the User’s Guide (Manual # M4954).

General Information

The RH511 is a handheld/benchtop meter that can 

measure & display ambient temperature, relative 

humidity, non-contact infrared temperature, 

and dual K type thermocouple temperatures. 

RH511 has built-in wireless capability. It acts as 

a wireless receiver when used with our wireless 

temperature/RH transmitter, model CTXL-PT.
RH511 has a built-in laser sighting feature used 

as an aiming tool to measure non-contact target 

temperatures. The laser beam is switchable 

between laser dot and circle. RH511 operates from 

6 AA size batteries. It also has 9Vdc adapter input 

and USB PC interface. The USB port is used to 

configure the unit and downloading logged data.
RH511 has logging capability where the user can 

log all the inputs (Ambient Temperature, Relative 

Humidity, Thermocouple 1, Thermocouple 2, and 

Infrared Temperature) simultaneously. The logging 

interval can be set from the front keypad and the 

display menus.

Dimensions And Locations Of Key Features

MODE

DP-WB

GPP

H O L D

°F

°C

MAX
MIN

SET
REC

TC1/TC2

IR

LASER

PROBE

DC POWER

INPUT

USB

PORT

TEMP/RH

9V

100mA

OMEGA

RH511 TEMP/RH/IR/TC

MULTI-METER & LOGGER

MADE IN U.S.A

!

+

-

RH

%

°F

°F

IR-T

!

108

(4.25)

215.9
(8.50)

63.5

(2.50)

LASER

WARNING

LABEL

RUBBER

BOOT

TEMP/RH

PROBE

HOLDER

DUAL K TYPE
THERMOCOUPLE
INPUT (SMP) SOCKETS

INFRARED LENS

LASER DOT/

CIRCLE SWITCH

LASER DOT

LASER BEAM APERTURE (LASER CIRCLE)

95.3

(3.75)

USB PORT

TEMP/RH PROBE
CONNECTOR

DIMENSIONS mm (in)

DC ADAPTER

INPUT

BACK VIEW

TRIPOD
MOUNT

TILT
STAND

MEMBRANE
KEYPAD

POWER

LCD BACKLIGHT

LASER

WA
VELENGTH 630-670 nm

LASER RADIA

TION- DO NO

ST
ARE INT

O BEAM

CLASS II (2) LASER PRODUCT

. COMPLIES WITH

OUTPUT< 1m

W,

IS EMITTED FROM

AVOID EXPOSURE

THIS APERTURE

CAUTION

LASER RADIATION

R

FD

21CFR 1040.10 & EN 60825-1/1

1.2001

DC 9V

T2

T1

PRESS HERE

OMEGASCOPE

 

AVOID EXPOSURE LASER RADIATION IS EMITTED FROM THIS APERTURE

LASER RADIATION - DO NOT STARE INTO BEAM
OUTPUT <1 mW, WAVELENGTH 630-670 nm 
CLASS II (2) LASER PRODUCT, COMPLIES 
WITH FDA 21CFR 1040.10 & EN60825-1/11.2001

®

OMEGASCOPE

CAUTION

RH

%

g/Kg

GPP

°C

°F

DP

WB

°C

°F

T1-K

MIN

MAX

LOG

HOLD

LOBAT

LAL

HAL

E1

E2

E3

E4

RX

IR-T

T2-K

T1-T2

RELATIVE

HUMIDITY

DISPLAY

AMBIENT TEMPERATURE

TC1,TC1-TC2,

DP,WB DISPLAYS

TC2, INFRARED

TEMPERATURE

DISPLAYS

MAXIMUM DISPLAY

ICON

MINIMUM DISPLAY

ICON

HOLD FUNCTION ICON

DATA LOGGING ICON

LOW BATTERY ICON

WIRELESS

COMMUNICATION

ERROR CODES

WIRELESS DATA

RECEIVE ICON

HIGH & LOW

ALARM ICONS

WIRELESS RECEPTION

SIGNAL STRENGTH

LASER INDICATOR ICON

INFRARED

TEMPERATURE

ICON

 Screen No.  Mode 

Press Mode 

Press SET/REC 

Press Up/Hold  

Press Dwn/ºF<>ºC

  

RH/Temp/IR 

Go to RH/TC1/IR 

Start/Stop 

Enable/Disable    Temp in °F or °C 

  

 

 

Record

   

RH/TC1/IR 

Go to RH/TC1/TC2 

Same 

Same 

Same

   

RH/TC1/TC2 

Go to RH/TC1-TC2/IR 

Same 

Same 

Same

   

RH/TC1-TC2/IR  Go to RH/Temp/TC2 

Same 

Same 

Same

   

RH/Temp/TC2  Go to RH/Emiss/IR 

Same 

Same 

Same

   

RH/Emiss/IR 

Go to High Alarm 

 ------- 

Increase  

Decrease    

  

 

 

 

Emissivity 

Emissivity

   

RH-High Alarm  Go to Low Alarm 

Enable/Disable  Increase High    Decrease High  

   

 

 

Alarm 

Alarm set point  Alarm set point

   

RH–Low Alarm  Go to Recording  

Enable/Disable  Increase Low  

Decrease Low 

   

 

Interval 

Alarm 

Alarm set point  Alarm set point 

   

Recording  

Go to Auto Power  

      -------- 

Increase 

Decrease   

   

Interval 

Shut off 

 

Recording 

Recording  

  

 

 

 

Interval 

Interval

   

Auto Power 

Go to RH/Temp/IR 

Enable/Disable         ----------- 

       ---------- 

   

Shut Off 

 

Power shut off

1

2

3

4

5

6

7

8

9

10

RH

%

°F

°F

IR-T

RH

%

°F

°F

T1-K

IR-T

MAIN MENU

RH

%

°F

°F

T1-K

T2-K

PRESS

RH

%

°F

°F

T2-K

RH

%

°F

IR-T

RH

%

HAL

RH

%

LAL

RH

%

°F

°F

IR-T

T1-T2

MODE

REC

REC

REC

REC

REC

ACTIVE KEYS

°F<->°C

MIN/MAX

HOLD

HOLD

HOLD

HOLD

DP-WB

GPP

°F<->°C

PRESS

MODE

°F<->°C

°F<->°C

PRESS

MODE

PRESS

MODE

°F<->°C

PRESS

MODE

ACTIVE KEYS

PRESS

MODE

SET

PRESS

MODE

SET

PRESS

MODE

PRESS

MODE

PRESS

MODE

SET

10

9

8

7

6

1

2

3

4

5

RH

%

°F

°F

IR-T

MAIN MENU

PRESS & HOLD

MODE

PRESS

MODE

PRESS

MODE

PRESS

MODE

ACTIVE KEYS

SET

for 2 seconds

1

18

19

20

RH

%

°F

°F

MAX

IR-T

RH

%

°F

°F

IR-T

RH

%

°F

DP

°F

IR-T

RH

%

°F

WB

°F

IR-T

GPP

°F

°F

IR-T

RH

%

°F

°F

MIN

IR-T

HOLD

RH

%

°F

°F

IR-T

PRESS

PRESS

PRESS

PRESS

RH

%

°F

°F

IR-T

LOG

PRESS

MAIN

MENU

HOLD

REC

MIN/MAX

MIN/MAX

PRESS

MIN/MAX

DP-WB

GPP

PRESS

PRESS
MIN, MAX VALUES

TO RESET

DP-WB

GPP

PRESS

DP-WB

GPP

PRESS

DP-WB

GPP

ACTIVE KEYS [      ]

MODE

°F<->°C

SET

°F<->°C

SET

SET

°F<->°C

11

1

12

13

14

15

16

17

Wireless Function Flow Chart

Display Screens Explained

1

 This is the main display screen when you power 

up the unit. It displays the relative humidity (%RH), 

ambient temperature (°F) on the second line, and 

the non-contact infrared temperature (°F) on the 

third line of the display. The IR-T icon indicates IR 

temperature measurement. Press and holding the 

laser key will turn on the laser beam and the laser 

icon on the display. There is a laser cover switch 

on front of the unit where by turning the cover, the 

laser beam changes from circle to laser dot.

2

 This display shows the relative humidity, 

thermocouple input 1 on the second line, and 

the infrared temperature on the third line of the 

display.

3

 This display shows the relative humidity, 

thermocouple input 1 on the second line, and 

the thermocouple input 2 on the third line of the 

display.

4

 This display shows the relative humidity, 

differential thermocouple temperature inputs 1 and 

2 (T1-T2), and infrared temperature.

5

 This display shows the relative humidity, 

ambient temperature, and the second thermocouple 

input (T2-K).

6

 This display shows the relative humidity, 

Emissivity value for the IR measurement and the 

Infrared temperature. You can press the Up and 

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