Omega Products CAL-3-HU User Manual

Portable Data Loggers with Display
Part of the NOMAD® Family

OM-73, temperature/relative

humidity data logger.

OM-70 Series

FREE Thermocouple Included!

Model OM-74 Includes a free 1 m (40”) Type K insulated
beaded wire thermocouple with subminiature connector and wire spool

Optional

caddy. Order a Spare! Model No. SC-GG-K-30-36.

OM-74,

thermocouple

data logger.

OM-71,

data logger

temperature

.

OM-72,

temperature

data logger

with remote

sensor.

U LCD Real Time Display of

Temperature (°C or °F), Relative
Humidity (% RH, Model OM-73
Only), Time, Date, Alarm Status,
Recording Status and
Battery Condition

U User Selectable Stop on

Memory Full or Memory
Rollover for Continuous
Recording

U PC Delayed Start or Push-

Button Recording Control

U Read Recorded Data

on Logger Display

U Displays Alarm Icon for High/

Low Alarm Conditions

U Nonvolatile EEPROM

Memory Retains Data
Even if Battery Fails

U USB Interface for Fast

Data Transfer

U Compact, Light Weight,

Easy-to-Use

The OM-70 Series of portable
temperature and temperature/
humidity data loggers are easy-to­use, versatile devices which can
be used for a wide range of logging
applications including coolers,
freezers, greenhouses, museums,

laboratories, shipping containers,
warehouses, environmental
monitoring and food storage.

These data loggers are capable of
sampling as fast as once per second
or as slow as every 18 hours.
Models OM-71 and OM-72 can
store a total of 43,344 temperature
measurements in memory.

Model OM-73 can store a total
of 43,344 measurement points
for temperature only or 21,672
points of temperature, humidity
and dew point. The model OM-74
thermocouple data logger can store
32,638 temperature samples. Easy­to-use Windows software is included
with each data logger.

The software is a full-featured
program that allows you to set up
all data logger functions including
sampling rate, logging duration, start
mode, logging mode, and high and
low temperature alarm values. Once
data has been logged, the program
then allows you to download data
from the logger, plot the data and
export the data to an ASCII text or
Excel file format for further analysis.

Software Features Include:

• Data summary to read statistics

and alarm information in a
simplified report format

• Data listing for tabular view of

detailed dates, times and values of
recorded data

• Graph function displays data in

clear graphical format.

• Zoom magnies data with powerful
zoom and autoscale functions.

• Autoscale function ts data to the

screen or allows user to manually
enter their own values.

• Graphical Cursor displays exact

data of any point in the graphical
display.

• Export data in text or Excel format.

• Print graph or text data with print

preview and setup options

• Logger conguration allows easy

set up and launch of data loggers
with immediate or delayed start,
preferred sample rate, alarm setup,

and custom ID

• Password protected calibration

function automatically stores with
parameters in device or restores
factory defaults.

To Order, Call or Shop Online at omega.com

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1

A calibration Window is provided
in the software to simplify the
calibration procedure.

• Status windows display unique
ID of logger, battery voltage,

memory used, sample rate,
duration, alarm condition
and logging status.

• Menu Bar along the top
of the screen provides one click
access to software functions.

Specifications

OM-71, OM-72, OM-73
Ambient Temperature

Measurement Range
(Models OM-71, OM-73):

-20 to 70°C (-4 to 160°F)

External Sensor Temperature
Measurement Range
(Model OM-72):

-40 to 70°C (-40 to 160°F)
Storage Temperature:

-40 to 77°C (-40 to 170°F)
Temperature Accuracy:
±0.5°C (±1°F), from -17 to 50°C
(1 to 122°F)
Temperature Resolution:

0.1°C (0.05°F)

Relative Humidity Range
(Model OM-73): 0 to 99% RH

non-condensing

Relative Humidity Accuracy
(Model OM-73):

±2% RH from 10 to 90% RH

Relative Humidity Resolution
(Model OM-73): 0.05% RH

OM-74
Display Temperature Resolution:

0.1°C (0.2°F) up to 199.9 °C or °F,
1°C (1°F) above 200 °C or °F

Logged Temperature Resolution:

0.1°C (0.2°F)
Thermocouple Impedance:
50 Ω max for specified accuracy

Cold Junction Temperature
Accuracy: ± 0.3°C (±0.5°F)
Operating Temperature:

-18 to 55°C (0 to 131°F)
Storage Temperature:

-30 to 80°C (-20 to 175°F)

GENERAL
Sample Rate: 1 second

to 18 hours user selectable

SM

Extended Warranty

Program

OMEGACARESM extended warranty program

is available for models shown on this page.

Ask your sales respresentative for full details

when placing an order. OMEGACARESM

covers parts, labor and equivalent loaners.

Thermocouple Temperature Range and Accuracy (OM-74)

Thermocouple Accuracy1 Logger Supported Range

K ±0.7°C (1.3°F) -250 to 1300°C (-418 to 2372°F)
J ±0.6°C (1.0°F) -170 to 1000°C (-274 to 1832°F)
E ±0.4°C (0.8°F) -200 to 820°C (-328 to 1508°F)

N ±0.8°C (1.5°F) -200 to 1300°C (-328 to 2372°F)
T ±0.7°C (1.3°F) -200 to 400°C (-328 to 752°F)
S ±2.8°C (5.0°F) -50 to 1760°C (-58 to 3200°F)
R ±2.8°C (5.0°F) -50 to 1760°C (-58 to 3200°F)
B ±3.3°C (6.0°F) 20 to 1820°C (68 to 3308°F)
C ±1.7°C (3.0°F) 0 to 2320°C (32 to 4208°F)

1

The accuracy given is for the OM-74 unit only. Errors may increase depending on the
thermocouple wire grade used.
The logger can only display temperatures up to 1999°F or 1999°C

2

The logger supported range is for stored temperature.

Alarm Settings:
Over/under alarm
with visual indication

Windows software
displays data
in graphical or
tabular format.

2

LCD Display: Displays

temperature, date, time,
alarm condition recording
status and battery condition
Time Accuracy:
±100 ppm @ 24°C (75°F)

Measurement Capacity:
OM-71, OM-72, OM-73:

Non-volatile memory;
samples for temperature only,
or 21,672 samples for temperature,
humidity and dew point
(Model OM-73); OM-74; 32,638
temperature samples

Recording Control: Start on button
press, immediate after setup, or at a
user specified date and time
Recording Mode: Stop on memory
full, or continuous recording with
memory rollover
Minimum System Requirements:

8MB of RAM, 2MB of disk space,
800 x 600 resolution, 1 free USB port

Software Compatibility:

Windows XP/VISTA/7
(32- and 64-bit)

To Order

Model No. Description

OM-71 Temperature data logger with display
OM-72
OM-73 Temperature/humidity data logger with display

OM-74 Thermocouple data logger with display
OM-74-NIST
OM-71-NIST
OM-72-NIST

OM-40-BATT-6 Replacement 3V lithium battery (box of 6), for OM-71, OM-72 and OM73

CAL-3-HU NIST traceable calibration certificate for OM-73

Comes complete with Windows software, operator’s manual on CD, USB interface cable
and battery.

Ordering Example: OM-73, temperature/humidity data logger with display and OCW-1
OMEGACARE 1 year extended warranty adds 1 year to standard 1 year warranty.

Visit omega.com/om-70_series for Pricing and Details

43,344

Interface: USB 2.0
Power: OM-71, OM-72, OM-73:

3V CR2032 lithium
battery (included);
OM-74: 3 AAA batteries (alkaline
or lithium (included)

Battery Life: 3 years (average)
Dimensions:
OM-71, OM-72, OM-73:

6 H x 5.7 W x 1.3 cm D
(2.36 x 2.24 x 0.51")
OM-74: 5.7 H x 5.5 W x 3.0 cm D
(2.25 x 2.15 x 1.2")

Weight: OM-71, OM-72, OM-73:

91 g (3.2 oz)
OM-74: 62 g (2.2 oz)

Temperature data logger with display and remote temperature sensor

Thermocouple data logger with display and NIST calibration certificate
Thermocouple data logger with display and NIST calibration certificate
Thermocouple data logger with display and remote temperature sensor

and NIST calibration certificate

2

To Order, Call or Shop Online at omega.com

SM