Digi-Sense 91428-06 Instruction Manual

INSTRUCTION MANUAL

Oakton® Temp-340 Thermistor

Datalogging Thermometer

Instruction Manual

Single-Input Data Logging

Thermistor Thermometer

(Model 91428-06)

68X001353 Rev0 0717 1065DGMAN_91428-06

TABLE OF CONTENTS

1. INTRODUCTION .................................... 1

2. SAFETY PRECAUTIONS ........................ 2

3. SPECIFICATIONS .................................. 3

4. BATTERY INSTALLATION AND

REPLACEMENT ..................................... 6

5. INSERTING AND REMOVING

OPTIONAL RUBBER ARMOR ................. 8

6. ASSEMBLING OPTIONAL

HANDS-FREE ACCESORIES ................. 9

7. CONNECTING A THERMISTOR ........... 10

8. KEY FUNCTIONS ................................. 11

9. DISPLAY OVERVIEW ........................... 12

10. MEASUREMENT MODE ....................... 14

11. HOLD FUNCTON ................................. 15

12. MIN, MAX, and AVG FUNCTION ........... 15

13. DATA LOGGING .................................. 15

14. SETUP MODE ...................................... 16

15. GENERAL SETUP SCREEN ................. 17

16. CALIBRATION SCREEN ....................... 19

17. ALARMS SCREEN ............................... 21

18. DATA LOGGING SCREEN .................... 24

19. CALIBRATION REPORT SCREEN ........ 27

20. CLEAR / RESET SCREEN .................... 28

21. MAINTENANCE .................................... 29

22. CLEANING ........................................... 29

23. BATTERIES ......................................... 29

24. TROUBLESHOOTING .......................... 30

25. ACCESSORIES .................................... 31

26. WARRANTY ......................................... 32

27. PRODUCT RETURN ............................. 32

28. INNOCAL® CALIBRATION AND

REPAIR SERVICES .............................. 33

- 1 -

1. INTRODUCTION

T

his versatile handheld

in

strument

provides highly

accu

rate te

mperature

measurements

. The

instrument

is designed

for

easy oper

ation

and

includes

the follo

wing

features:

• Menu driven setup and operation

• Data logging for up to 2000 points

• USB output

• Operator selection of Celsius or

Fahrenheit scale

• Resolution of up to 0.01°C/°F

• Large backlit LED and dot-matrix

graphic LCD display

• Hold feature for temporarily retain
a reading

• Displays minimum and maximum
and average readings

• Field calibration capability

• Disabling of auto-off function

• Low-battery warning

• Bayonet connector input

- 2 -

2. SAFETY PRECAUTIONS

WARNING:

1. This instrument is designed to
accept low level signals supplied
by standard thermistors. Under
NO circumstances should the input
voltage exceed the specified
50V RMS.

2. To prevent ignition of a hazardous
atmosphere, batteries must only be
changed in an area known to be
nonhazardous.

CAUTION:

1. Do not use or store this instrument
in microwave ovens or any
abnormally hot or cold areas.

2. Weak batteries should not be left in
the instrument. Dead batteries can
leak and cause damage to unit.

DANGER:

1. Voltages present at the thermistor

may also be present at the battery
terminals. Always disconnect the
thermistor when changing batteries.

- 3 -

3. SPECIFICATIONS

Thermistor Thermometers

Type

Temperature range

400 series

–40 to 150°C

(–40 to 302°F)

Out-of-range display: OPEN
Resolution:

0.01 or 0.1 °F/°C; auto-ranging to 0.1°

above +99.99°
Accuracy:

From –40.00 to 99.99°F (–40.00 to

99.99°C): ±0.06°F (±0.03°C)

From 100.0 to 257.0°F (100.0 to 125.0°C):
±0.1°F (±0.1°C)

From 257.0 to 302.0°F (125.0 to 150.0°C):
±0.9°F (±0.5°C)

Display:
Backlit dot matrix, 50mm x 37.2mm

Data logging:

2000 points

Logging interval:

2 sec to 60 min

Min/Max/Avg function:

Yes

- 4 -

Auto off (adjustable time):

Enable/disable option available

Stability criteria:

Yes, upon stability of 5 seconds
Display update rate:

0.6 second per update

Input:
One bayonet connector

Input protection:
50V rms

Storage temperature:

–40°C to 65°C (–40°F to 149°F)

Humidity:

10% to 90% RH (noncondensing)

Battery life:
Size: Three AA, 1.5V; alkaline
Life: 400 hours continuous, typical,

(without backlighting)

Dimensions:
Without armor:

175mm (L) x 97mm (W) x 42mm (H)

With armor:

180mm (L) x 102mm (W) x 52mm (H)

Weight with batteries:
Without armor: 267g
With armor: 362g

- 5 -

Ingress protection:

Meets IEC-529 IP-54 for dust and water
resistant enclosures (probe attached)

CE Compliance:

EN61326-1/A1: 1998 (EU EMC Directive)

- 6 -

4. BATTERY INSTALLATION AND

REPLACEMENT

The total battery life without backlighting
is about 400 hours. Remaining battery
power is indicated but the battery life
indicator.

Indicator

Voltage

Cell + 3 bars
More than 4.1 V

Cell + 2 bars

More than 3.6 V

Cell + 1 bars

More than 3.0 V

Cell + empty

bars flashing

More than 2.85 V

Adaptor power

supply

Main power supply

connected

USB power

supply

USB power connected

- 7 -

Selected settings are stored in memory
and will remain in memory even after
power is turned off, or while batteries
are being replaced.

1. Before changing battery, turn
instrument off and disconnect
thermistor.

2. Loosen screw and lift battery cover
off back of case.

3. Remove the three AA batteries.

4. Insert three new batteries observing
polarity.

5.

Install cover and tighten screw.

- 8 -

5. INSERTING AND REMOVING

RUBBER ARMOR

1. To insert thermometer into the
optional rubber armor, slide in from
the top of meter before pushing the
bottom edges of meter down to set
it into position. Lift up the stand at
the back of meter for bench top
applications if necessary.

2. To remove thermometer from armor,
push out from the bottom edges of
meter until it is completely out of
boot.

- 9 -

6. ASSEMBLING OPTIONAL

HANDS-FREE ACCESORIES

You can use the optional magnets and
strap in the Hands-Free Kit accessories
for hands-free operations.

- 10 -

7. CONNECTING A THERMISTOR

Use the correct 400 series thermistor
for your instrument. Using an incorrect
probe type will result in erroneous
readings. Insert the bayonet plug
into the mating connector on the top
of the instrument.

If no probe is connected the display
will read “open”.

Thermistors are sensitive at the tip or
sensing element. When taking
measurements, allow time for the
reading to stabilize. Multiplying the time
constant of the probe by 5 will give you
the approximate time required.

- 11 -

8. KEY FUNCTIONS

Note: Function keys change in setup

mode to provide advanced operation
flexibility. Text above key will indicate
function.

F1

Step through Min, Max and Avg
readings.

F2

Toggle between F and C
display

F3

Toggle between menu and
measure mode

hold

Freeze display

on/off

light

Turns meter on and off (press
and hold for 3 seconds to turn
off)

Press momentarily to turn on
backlight

recall▲

Recalls and steps through
stored readings

log▼

Stores current measured value
to memory

- 12 -

9. DISPLAY OVERVIEW

The dot matrix display features a large
primary display, smaller secondary
displays for channel info or min/max/avg,
and helpful annunciators for added
measurement data.

- 13 -

1

Power supply indicator
(Battery/Main adapter/USB)

2

Date (format of mmm – dd)

3

Time (hour:min)

4

Time format (am/pm/hrs)

5

Measurement mode

6

Hold function indicator

7

Stable indicator

8

Data logging indicator

9

PC data logging indicator

10

Main reading display

11

Current reading unit indicator

12

Min/Max/Avg elapsed time

13

Current Min/Max/Avg reading
indicator

14

Meter logging memory location

15

Measurement alarm active
indicator

16

Countdown time indicator with
countdown time

17

Min/Max/Avg display

18

Min/Max/Avg unit indicator

19

Function keys

- 14 -

10. MEASUREMENT MODE

On initial start-up, the meter will display
the measured value for in the primary
display.

Pressing the F2 key will toggle reading
between F and C display.

Pressing the F1 key initiates and toggles
through Minimum, Maximum, and
Average reading modes.

Pressing F3 enter accesses Setup
mode.

- 15 -

11. HOLD FUNCTON

Press the hold key to retain the reading
on the display. Press the hold key again
for normal operation.

12. MIN, MAX, and AVE FUNCTION

Press the F1 key to toggle between the
minimum, maximum, and average
readings. The minimum and maximum
reading function is ideal for monitoring
unattended operations while continually
displaying every temperature change
that occurs. The minimum and maximum
values are sensed and automatically
stored.

To exit and clear this function, press the
F3 to access the Menu functions.
See the Clear Reset menu section for
more details.

13. DATA LOGGING

Press the log ▼ key to store the current
reading to memory. The memory
indicator M = 1234 shows the memory
location for the next stored reading.

Press the recall ▲ key to review stored
readings.

See section on Data Logging for timed
logging, and logging to a computer.

See section on Clear/Reset for
information on clearing stored readings.

- 16 -

14. SETUP MODE

To access the setup mode from
measurement mode, press the F3 key
(Menu).

Press ▲▼ keys on the meter key pad
to scroll through options.

To enter a setup screen, press
Select F1 key.

To return to measurement mode, press
Meas F3 key. Following menu options
are listed

1. General Setup

2. User field calibration

3. Alarm settings

4. Data logging settings

5. View user calibration report

6. Clear/Reset options

- 17 -

15. GENERAL SETUP SCREEN

The first page of the General Setup
screens let you set Resolution, auto-off
time, and password.

Press F1 to indicate you want to change
the setting of the current parameter or
recall▲ or log▼ to move to the next
parameter.

Press recall▲ or log▼ to change the
options.

Press F2 to choose the next setting.
Whenever set the options, press F1 for
accepting the choice.

- 18 -

This screen below is used to reset/change
password. In the event if uses forget
his/her password, 5586 can be used to
reset to a new value.

On the second page, you can set time
and date.

- 19 -

16. CALIBRATION SCREEN

The thermometer is factory calibrated and
does not require calibration before use.
The Calibration function allows single­point calibration of the thermometer, at
any temperature point to compensate for
thermistor off-set error. It is NOT
necessary to perform a field calibration to
obtain specified meter accuracy. Use the
field calibration feature to improve
thermometer/probe accuracy or to
compensate for thermistor drift.

Before go into the calibration mode, must
enter the password. Press F2 to change to
the next digit. (Default Password is 9900).

- 20 -

There are two calibration options:

Offset – adjusts at a single point. Offset
calibration can be performed at any
temperature in the offset range of
±5.00°C or 9.00°F.

Slope – adjusts at two points. The
two calibration points must be at least

20.00°C (36.00°F) apart. The 2nd
calibration point should be at a higher
value than the 1st calibration point.

Use the ▲ or ▼ keys to adjust the value
to match known temperature standard.
Press F1 to accept.

- 21 -

17. ALARMS SCREEN

There are two kind of alarm setting is
available under the alarm setting options

Measurement alarm

Disable or enable the alarm by pressing

recall▲ or log▼and F1 to accept. Increase

or decrease individual limit by pressing
recall▲ or log▼.

Meter in alarm mode

- 22 -

Countdown alarm

You can enable/disable the countdown
alarm and set the countdown time from
5 sec to 1 hour.

After setting (enabling) the countdown
alarm, the measurement screen should
look like this:

- 23 -

Press F2 key to start the countdown:

Press F2 key in the middle of a countdown
will stop the process:

You will need to restart the countdown

by selecting the “start” key (F2).
Alternatively, you can also c hoose “Menu”

to go into the timer menu and disabling the
alarm.

- 24 -

The buzzer will sound for 30 seconds, or
until the reset (F2) is pressed, at the end
of the countdown.

To reset the timer, select “restart” (F2) it.
You display should look like this:

To repeat the functions, select F2.

Note:

The °C/°F function is disabled when the
count down function is enabled. To
activate the °C/°F function on
measurement screen, please go into the

Flashing
annunciator
indicates that
the countdown
has expired

- 25 -

“Alarm Setting page 2” and disable the

count down alarm function.
When activated, the countdown timer

temporarily over-rides the Auto-shutoff
until the countdown is completed or
manually stopped. If the meter is manually
or auto shutoff,

The Countdown Alarm is automatically

reset to “Disable” each time the meter is

shut off. The “Timer” key will revert back
to the “°C/°F” key.

- 26 -

18. DATA LOGGING SCREEN

Press recall▲ or log▼to choose the

logging methods as auto or manual. If it

is auto logging, using recall▲ or log▼to

set time interval. Its range is from 0 min
to 60 min.

Data Transfer from Meter to Computer

- 27 -

Once the USB connection is established
with PC, press the Start button to
download data from Meter to PC using
HyperTerminal.

***NOTE: METER MUST BE TURNED
ON PRIOR TO CONNECTING USB
CABLE OR COMPUTER MAY NOT
RECOGNIZE THE INSTRUMENT.***

19. CALIBRATION REPORT SCREEN

The Calibration report will show the time
and date along with results of the last user
calibration.

- 28 -

20. CLEAR / RESET SCREEN

Press F1 to choose which data you want
to clear or reset. For calibration, logged
data and reset all, you will have to enter
the password to proceed. (Default
Password is 9900).

- 29 -

21.

MAINTENANCE

Properly used, the thermometer should
maintain calibration indefinitely and not
require service other than occasional
cleaning of the housing and changing of
the batteries.

22. CLEANING

WARNING:

TO PREVENT IGNITION OF A
HAZARDOUS ATMOSPHERE BY
ELECTROSTATIC DISCHARGE,
CLEAN WITH DAMP CLOTH.

Do not clean with abrasives or solvents.
Use mild detergents, never immerse nor
use excessive fluid.

23. BATTERIES

If there is no display when the meter is
turned on, check condition of the three AA
batteries. Also check that the battery
terminals are clean and batteries are
properly installed.

If replacement is necessary, refer to
the BATTERY INSTALLATION AND
REPLACEMENT section for replacement
procedure.

- 30 -

24. TROUBLE SHOOTING

The following chart lists the most probable
faults. There are no internal adjustments
or user-replaceable parts.

FAULT

ACTION

NO

Display

Check condition of batteries.
Check that batteries are inserted
properly.

Display

shows
OPEN

No thermistor connected in the
connector.

Display

shows

Err

If display shows this message
other than during the field
calibration mode, please return
the instrument for servicing

Cannot

connect

to PC

Ensure that the meter is powered
on and measuring prior to
connecting to USB port. Before
and after the driver is installed,
your PC may not recognize the
meter if it is not powered on prior
to connecting the USB to the
computer.

- 31 -

25.

ACCESSORIES

Replacement Meter and Meter
Accessories

Item

Part
Number

Single-input data logging thermistor
thermometer

91428-06
Rubber armor with stand

35427-80

Hands-free kit (two magnets and a
strap)

35427-85

General-purpose probe (Immersion
into liquids)

08491-06

Flexible general-purpose probe
(vinyl sheath)

08491-02
USB cable

35427-86

Adapter, 100 to 240 VAC

91427-99

- 32 -

26. WARRANTY

The Manufacturer warrants this product
to be free from significant deviations
from published specifications for a
period of three years. If repair or
adjustment is necessary within the
warranty period, the problem will be
corrected at no charge if it is not due
to misuse or abuse on your part as
determined by the Manufacturer. Repair
costs outside the warranty period, or
those resulting from product misuse or
abuse, may be invoiced to you.

27. PRODUCT RETURN

To limit charges and delays, contact the
seller or Manufacturer for authorization
and shipping instructions before
returning the product, either within or
outside of the warranty period. When
returning the product, please state the
reason for the return. For your
protection, pack the carefully and insure
it against possible damage or loss. The
Manufacturer will not be responsible for
damage resulting from careless or
insufficient packing.

- 33 -

28. INNOCAL® CALIBRATION AND
REPAIR SERVICES

Optimum performance of your
temperature-measuring instrument is
not a timeless condition. To ensure
quality measurements, have your
instrument calibrated regularly. Trust
InnoCal to satisfy your calibration and
equipment repair needs. With over a
decade of service, we've helped
thousands of customers meet ISO, FDA,
EPA, GLPs/cGMPs and other quality
standards.

Conformity*

ISO/IEC 17025:2005 accredited
NIST Handbook 150, 2000 Edition
ANSI/NCSL Z540-2-1997
NIST Technical Note 1297
ISO 9000:2000

Fast Service

Our substantial inventory of replacement
parts ensures a fast turnaround and
prevents costly downtime. Most
instruments serviced in five business
days!

Excellent Value

Get quality at a fair price. Our InnoCal
NIST-traceable certificates offer
extensive test data on a broad range of
measurement parameters without
breaking the bank!

- 34 -

Reliable Support

Trust in our free diagnostic support and
troubleshooting advice. Our factory­trained metrologists and technicians are
armed with years of experience and
extensive technical data.

Convenient Reminders

It’s so easy to keep your instruments

functioning properly. Based on your
requirements, InnoCal will send you a
reminder when it’s time to recertify or
service your instrument.

We provide you with the documentation
you need to meet your most stringent
quality requirements for the control of
inspection, measuring, and test
equipment.

Certification includes certificate of
calibration with test data, including:

● Description and identification of the

item certified

● Condition of the item

● Issue date

● Identification of calibration procedure

● Calibration date

● As found/as left test data (where

applicable)

● Signature of technician

● Statement of estimated uncertainty

● List of equipment used to perform

calibration (including their calibration
dates)

- 35 -

With today's high quality standards such
as ISO 9000, certification is becoming
increasingly important. Traceability is
not a timeless condition. It must be
verified and maintained over the life of
the calibration to ensure the highest
accuracy possible. When you have your
calibration done by InnoCal, we will
send you an automatic reminder when
it is time to recalibrate your instrument.

Are your calibration certificates
good enough?

InnoCal surpasses the competition by
providing the most complete certificates
as required by NIST. All of our
certificates include measured data and
point-by-point measurement uncertainty,

and by request, we’ll provide test

accuracy and test uncertainty ratios at
no extra cost. Call us today and see why
InnoCal is The Choice of Quality.

*See our Scope of Accreditation for any
limitations.

- 36 -

Calibration
test points
against
NIST­traceable
standards

Meter
only

Probe
only

System
(meter +
probe)*

Four test points
across range of

instrument.
0, 100, 165,

230 C

(-4, 32, 446,

770F)

17000-06

17001-06

17002-06

InnoCal—The Choice of Quality

866-INNOCAL (866-466-6225)

InnoCalSolutions.com

- 37 -

TECHNICAL ASSISTANCE
If you have any questions about the

use of this product, please contact the
Manufacturer or authorized seller.

For more information, contact:

OAKTON
Instruments/Thermo Scientific
Products, please contact your nearest
distributor or

Cole-Parmer

Toll-Free: 1-800-323-4340
Phone: [phone]
Fax: [phone]
ColeParmer.com/Digi-Sense

1065DGMAN_91428-06

Formatted: Font: 9 pt, Bold

Formatted: Left, Indent: Left: 0.08", Li ne spacing: Exactly

12 pt

Formatted: Left, Indent: Left: 0.08", Li ne spacing: Exactly
12 pt