DIGI-SENSE DIGI-SENSE 91428-08 Manual

Instruction Manual

Single-Input Data Logging

RTD Thermometer

(Model 91428-08)

68X001354 Rev 0 0717 1065DGMAN_91428-08

99 Washington Street
Melrose, MA 02176

Phone [phone]
Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

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

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

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

4. BATTERY INSTALLATION AND

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

5. INSERTING AND REMOVING

OPTIONAL RUBBER ARMOR .......... 7

6. ASSEMBLING OPTIONAL
HANDS-FREE ACCESORIES

........... 8

7. CONNECTING A RTD ....................... 9

8. KEY FUNCTIONS ........................... 10

9. DISPLAY OVERVIEW ..................... 11

10. MEASUREMENT MODE ................. 13

11. HOLD FUNCTON ............................ 14

12. MIN, MAX, AND AVG FUNCTION ... 14

13. DATA LOGGING ............................. 14

14. SETUP MODE ................................. 15

15. GENERAL SETUP SCREEN .......... 16

16. CALIBRATION SCREEN

................. 18

17. ALARMS SCREEN .......................... 20

18. DATA LOGGING SCREEN ............. 25

19. CALIBRATION REPORT SCREEN

. 26

20. CLEAR/RESET SCREEN ............... 27

21. MAINTENANCE

............................... 28

22. CLEANING

...................................... 28

23. BATTERIES

..................................... 28

24. TROUBLESHOOTING ..................... 29

25. ACCESSORIES

............................... 30

26. WARRANTY

.................................... 31

27. PRODUCT RETURN

....................... 31

28. INNOCAL® CALIBRATION AND

REPAIR SERVICES ........................ 32

TABLE OF CONTENTS

- 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 LCD and dot-matrix

graphic LCD display

• Hold feature for temporarily retain a
reading

• Displays minimum, maximum and
average readings

• Field calibration capability

• Disabling of Auto-Off function

• Low-battery warning

• Three-pin DIN connector input

• Operates with a wide selection of

RTD probes

- 2 -

2. SAFETY PRECAUTIONS

WARNING:

1. This instrument is designed to accept
low level signals supplied by standard
RTDs. 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 RTD may
also be present at the battery
terminals. Always disconnect the
RTD when changing batteries.

- 3 -

3. SPECIFICATIONS

RTD Thermometers
Temperature range:

–201 to 1210°C (–330 to 2210°F)

Out-of-range display: - - -

-

Reso

lution:

From –330.0 to –100°C/°F: 0.1°C/°F
From –99.99 to 99.99°C/°F: 0.01°C/°F
From 100.0 to 999.9°C/°F: 0.1°C/°F
Above 1000°C/°F: 1°C/°F

Accuracy:

From –330.0 to –100°C/°F:
±0.1°C (±0.2°F)
From –99.99 to 99.99°C/°F:
±0.03°C (±0.06°F)
From 100.0 to 999.9°C/°F:
±0.1°C (±0.2°F)
Above 1000°C/°F: ±1°C (±2°F)

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:

0.5

second per up

date

Input:

One three-pin DIN connector
Input protection:

50V

rms

Storage:

–40 to 65°C (–40 to 149°F)

Humidity:

10% to 90% (noncondensing)

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

(without backlighting and buzzer on)

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
(with 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
by the battery life indicator.

Indicator

Voltage

Cell + 3 bars

More than 4.1 V

Cell + 2 bars

More than 3.6 V

Cell + 1 bar

More than 3.0 V

Cell + empty bars

flashing

More than 2.85 V

Adapter power

supply

Main power supply

connected

USB power supply

USB power

Selected settings

are

stored in
memory and will remain in memory
even

after

power is turned

off, or

while

batteries

are being replac

ed.

1. Before

changing

battery, tur

n

instrume

nt off

and disconnect RTD

.

2.

Loosen screw and

lift battery

cover

off

back

of case.

3.

Remove

the t

hree

AA batteries.

4. Insert three

new

batteries

observing

pol

arity.

5.

Install

cover and

tighten

screw

.

- 7 -

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.

- 8 -

6. ASSEMBLING OPTIONAL
HANDS-FREE ACCESSORIES

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

- 9 -

7. CONNECTING A RTD

Use the correct 100 Ω RTD (al pha =

0.003850) for your instrument. Using
an incorrect probe type will result in
erroneous readings. Insert the 3-pin
plug into the mating connector on the
top of the instrument.

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

RTDs

are sensitive

at the tip or

sensing element

. W

hen

taki

ng

measurements, allow

time for the

reading to

stabilize. Multip

lying

the

time constant of the

probe by 5 will

give you

the

approx

imate time

required

.

- 10 -

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

- 11 -

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.

- 12 -

1

Power supply indicator
(Battery/Main adapter/USB)

2

Date (format of mm – 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

- 13 -

10. MEASUREMENT MODE

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

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

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

Pressing the F3 key accesses the
Setup mode.

- 14 -

11. HOLD FUNCTION

Press the

hold

key to retain the reading

on the display. Press the

hold

key

again for normal operation.

12. MIN, MAX, AND AVG 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

key to access the Menu functions.

See the CLEAR/RESET SCREEN
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 the DATA LOGGING section for

timed logging, and logging to a
computer. See the CLEAR/RESET
SCREEN section for information on
clearing stored readings.

- 15 -

14. SETUP MODE

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

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

To enter a setup screen, press the
“Select” key

(F1)

.

To return to the measurement mode
press the “Meas” key

(F3)

. The

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

- 16 -

15. GENERAL SETUP SCREEN

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

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

Press the recall ▲ key or log ▼ key
to change the options.

Press the F2 key to choose the next
setting. When the option is set, press
the F1 key to accept the choice.

- 17 -

The screen below is used to
reset/change the password. If the user
forgets the password, 5586 can be
used to reset to a new value.

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

- 18 -

16. CALIBRATION SCREEN

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

Before going into the Calibration mode,
the user must enter the password.
Press the F2 key to change to the next
digit. (Default Password is 9900)

- 19 -

There are two calibration options:

Offset

– adjusts at a single point.
Offset calibration can be performed at
any temperature in the offset range of
±10.00°C or ±18.00°F.

Slope

– adjusts at two points. The two

calibration points must be at least

40.00°C (72.00°F) apart. The second
calibration point should be at a higher
value than the first calibration point.

Press the ▲ or ▼ key to adjust the
value to match a known temperature
standard. Press the F1 key to accept.

- 20 -

17. ALARMS SCREEN

There are two kinds of alarm settings
available in the alarm setting options:

MEASUREMENT ALARM

Disable or enable the alarm by pressing
the recall ▲ or log ▼ key and the F1
key to accept. Increase or decrease
the individual limit by pressing the
recall ▲ or log ▼ key.

Meter in alarm mode

- 21 -

COUNTDOWN ALARM

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

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

- 22 -

Press the F2 key to start the
countdown:

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

Restart the countdown by pressing the
“Start” key (F2).

Alternatively, press the “Menu” key
(F3) to go into the timer menu and
disable the alarm.

- 23 -

The buzzer will sound for 30 seconds
or until the “Reset” key (F2) is pressed
at the end of the countdown.

To reset the timer, press the “Reset”
key (F2). The display will look like this:

To repeat functions, press the F2 key.

Note: The °C/°F function is disabled
when the countdown function is
enabled. To activate the oC/oF function
on the measurement screen, see the

Flashing icon
indicates that
the countdown
has expired

- 24 -

COUNTDOWN ALARM section and
disable the countdown alarm function.

When activated, the countdown timer
temporarily overrides the auto-off
function until the countdown is
completed or manually stopped. If the
meter is manually or automatically shut
off, the countdown alarm is
automatically set to “Disable” each
time the meter is shut off. The “Timer”
key will revert back to the “°C/°F” key.

- 25 -

18. DATA LOGGING SCREEN

Press the recall ▲ key or log ▼ key
to choose the logging methods as auto
or manual. If auto logging is selected,
use the recall ▲ key or log ▼ key to
set the time interval. Its range is from
2 minutes to 60 minutes.

DATA TRANSFER FROM METER TO
COMPUTER

- 26 -

Once the USB connection is
established with a PC, press the
“Select” key (F1) 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.

- 27 -

20. CLEAR/RESET SCREEN

Press the F1 key to select the 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).

- 28 -

21. MAINTENANCE

Properly us

ed, the th

ermome

ter

should maintain calibr

ation 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 wi

th

abrasives or

solven

ts.

Use mild

detergents,

never

immerse nor use excessive

fluid.

23. BATTERIES

If there is no

display when

the

thermometer is turned

on,

check the

cond

ition of th

e three

AA batteries.

Also,

check

that the battery ter

minals

are clean and

batteries

are properly

install

ed.

If

replacement is necessary

, refer to
the BATTERY INSTALLATION AND
REPLACEMENT section for the
replacement proced

ure.

- 29 -

24. TROUBLESHOOTING

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
OVER /
UNDER

Out-of-range indication

Display
Shows
OPEN

No RTD 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.

- 30 -

25. ACCESSORIES

Replacem

ent

Meters and Meter

Accessories

Item

Part
Number

Single-input data logging RTD
thermometer

91428-08
Rubber armor with stand

35427-80

Hands-free kit (two magnets
and a strap)

35427-85

General-purpose probe
(immersion into liquids)

08117-70

Penetration probe
(meat, semi-soft materials)

08117-85

Surface probe
(direct contact on hot surfaces)

08516-60
Air/gas probe

08117-90

- 31 -

26. WARRANTY

The

Manufac

turer

warra

nts this
product to be free from significant
deviations from published
specifications

for a

period

of

three

(3) ye

ars. If

repair or adjus

tment

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
deter

mined by

the

Manufacture

r.

Repair

costs

outside

the

warr

anty

period, or

those

resulting

from

prod

uct

misuse or abus

e,

may be

invoiced

to

you

.

27. PRODUCT RETURN

To limit

charges and dela

ys, contact

the

seller or Manu

fact

urer

for

author

ization

and shipping

in

structions

before returning

the

produ

ct,

either within or

outside of

the

warranty peri

od. W

hen

retur

ning

the

produc

t,

please

state the

reason

for the

return

. For

your

protectio

n,

pack

the instrument

carefully and

insure

it

agai

nst

possible damage or
loss. The Manufacturer will not be
responsible for damage resulting
from careless or insufficient packing.

- 32 -

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!

- 33 -

Reliable Support

Trust in our free diagnostic support
and troubleshooting advice. Our
factory-trained metrologists and
technicians have 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 i t’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)

- 34 -

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
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uncertainty, and by request, we ’ll
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Call us today and see why InnoCal is
The Choice of Quality.

*See our Scope of Accreditation for
any limitations.

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,

770˚F)

17000-04

17001-04

17002-04

InnoCal—The Choice of Quality
1-866-InnoCal (1-866-466-6225)

InnoCalSolutions.com

Visit us at www.TestEquipmentDepot.com

- 35 -

99 Washington Street
Melrose, MA 02176

Phone [phone]
Toll Free 1-800-517-8431