Digi-Sense 91428-07 Instruction Manual

Instruction Manual

Single-Input

RTD Thermometer

(Model 91428-07)

68X001350 Rev0 0717 065DGMAN_91428-07

TABLE OF CONTENTS

QUICK-START GUIDE ............................. 1

1. INTRODUCTION ................................ 2

2. SAFETY PRECAUTIONS ................... 3

3. SPECIFICATIONS .............................. 4

4. BATTERY INSTALLATION AND

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

5. INSERTING AND REMOVING

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

6. ASSEMBLING OPTIONAL HANDS-

FREE ACCESORIES .......................... 8

7. CONNECTING AN RTD PROBE ........ 9

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

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

10. MEASUREMENT MODE ...................12

11. SELECTING TEMPERATURE

SCALE ..............................................13

12. MIN AND MAX FUNCTION ................14

13. AUTO OFF FUNCTION .....................14

14. CALIBRATION ...................................15

15. CLEAR FIELD CALIBRATION ...........16

16. FIELD CALIBRATION UNLOCK ........16

17. FIELD CALIBRATION LOCKOUT ......17

18. MAINTENANCE .................................18

19. CLEANING ........................................18

20. TROUBLESHOOTING .......................19

21. SERVICE ...........................................20

22. REPLACEMENT METER &

ACCESSORIES .................................20

23. WARRANTY ......................................21

24. PRODUCT RETURN .........................21

25. INNOCAL® CALIBRATION AND

REPAIR SERVICES ..........................22

- 1 -

QUICK-

START

GUIDE

To ensure best results please read the
complete manual.

1. Connect probe.

2. Press the on/off key.

Press again to turn on backlight.

3. Select °C or °F display using °C/°F key.

4. Insert probe in sample.

Allow adequate time for reading to
stabilize.
Response time will vary depending on
probe.

5. Take reading.

Press hold key to freeze display.
Press min/max to display minimum or
maximum temperature.

6. Press and hold the on/off key for three

seconds to turn meter off.

- 2 -

1. INTRODUCTION

This versatile handheld
instrument provides highly
accurate temperature
measurements and is
designed for easy operation,
which includes the following
features:

• Operator selection of Celsius or

Fahrenheit scale

• Resolution of 0.1° (auto ranging)

• Four-digit backlit LCD

• Hold feature to retain a reading

temporarily

• Field calibration capability

• Low-battery warning

• Auto power off with Enable/Disable

function

• Min and Max readings display

• 3-pin circular connector input

• Operates with a wide selection of

probes

- 3 -

2. SAFETY PRECAUTIONS

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

This instrument is designed to accept low
level signals supplied by standard 100 Ω
RTDs. Under no circumstances should the
input voltage exceed the specified 10V rms.

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.

WWARNING

- 4 -

3. SPECIFICATIONS

Platinum RTD Probes

100 ohm platinum: alpha = 0.003850
–200 to 850°C (–392 to 1562°F)

Out-of-range display: “Ur”, “Or”, “OPEN”

Range

Accuracy

–200.0 to –100.0°C

(–392 to –148°F)

±2.0°C

(±4.0°F)

–99.9 to 199.9°C

(–148 to 392°F)

±0.2°C

(±0.4°F)

200.0 to 850.0°C
(392 to 1562°F)

±2.0°C

(±4.0°F)

Resolution

0.1° (–200.0 to 850.0°C);

0.1° (–392.0 to 999.9°F);
1° (1000 to 1562°F)

Display

4-digit LCD (¼ x ½" digits);
2 1/3 x 1 ½" backlit viewing

area

Display update
rate

0.5 sec per update

Input

One probe with 3 pin circular
connector (Switchcraft TA3F)

Input protection

10V rms

Battery

Three AA, 1.5V alkaline

Battery life

700 hours continuous

Auto shutoff

17 minutes after last
keypress

Stated accuracy

18 to 28°C
(64 to 82°F)

Useful range

0 to 40°C
(32 to 104°F)

Storage

–40 to 65°C
(–40 to 149°F)

Humidity

10% to 90% RH
(noncondensing)

Dimensions

Without armor
With armor

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

180 mm x 102 mm x 52 mm

- 5 -

Weight

Without armor
With armor

267 g
362 g

Ingress protection
(with probe
attached)

Meets IEC-529 IP54 for
dust and water-resistant
enclosures

CE compliance

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

- 6 -

4. BATTERY INSTALLATION AND
REPLACEMENT

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

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

The typical battery life is about 700 hours.
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, tur

n

instrume

nt off

and disconnect probe

.

2.

Loosen screw and

lift battery

cover

off

the

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
OPTIONAL RUBBER ARMOR

Figure 1: Removing Optional 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

ACCESORIES

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

Figure 2: Hands-Free Kit

- 9 -

7.

CONNECTING

AN RTD PROBE

Use the correct 100 Ω RTD (alpha =

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.

Figure 3: Top view of RTD thermometer

RTD Input

- 10 -

8. KEY FUNCTIONS

Figure 4: Keypad

Toggles between Celsius or
Fahrenheit in measurement mode
and user calibration mode.

Press and hold this key for 3 seconds
to enter Calibration mode if field
calibration is unprotected.

Activates/deactivates freezing of the
measured reading while in
measurement mode.

Toggles between minimum and
maximum readings (MIN and MAX
readings are calculated from the last
min/max keypress).

Press and hold this key for 3
seconds to clear the MIN/MAX
reading stored.

Powers on and shuts off the
thermometer by holding it for
3 seconds.

Press this key to activate/ deactivate
the backlight display. (Backlight will
automatically turn off within 30
seconds of activation).

°C/°F

cal

hold

min

max

on/off

light

- 11 -

9. DISPLAY OVERVIEW

Figure 5: Meter Display

°C/°F

Celsius or Fahrenheit indicator.

MIN

Minimum reading annunciator.

MAX

Maximum reading annunciator.

3 Bars: 700 – 550 hours
2 Bars: 350 – 550 hours
1 Bar: 150 – 350 hours
Blinking: < 150 hours

CAL

Blinks during calibration mode.
Remains in display indicating
field calibration is active.

HOLD

Remain in display during hold
mode.

STABLE

Displayed upon recognizing
final value.

- 12 -

10. MEASUREMENT MODE

Press the on/off key. The thermometer
performs a self-test and all display digits
and indicators should remain on for
approximately two seconds before the
meter enters measurement mode.

If a probe is not connected or if the probe is
defective, the display will indicate “OPEN”.

Figure 6: Display when no probe is detected

For optimum instrument accuracy, allow one
minute for ambient temperature stabilization.
If the unit has been stored at an extreme
ambient condition, more time will be needed.

A STABLE indicator appears at the top right
corner of the display when reading is
continuously stable for 5 seconds.

To freeze reading, press hold. Press hold
key again to release the reading and resume
normal operation.

Figure 7: HOLD and STABLE function

The display will show “Ur” (under range) or
“Or” (over range) if the temperature reading

is out of range of the instrument.

°c

°c

HOLD STABLE

- 13 -

11. SELECTING TEMPERATURE
SCALE

Figure 8: Press °C/°F key to toggle

between °C and °F

Select °C or °F by pressing the °C/°F key.
Each time the key is pressed, the
temperature scale will switch. Switching
between °C and °F can be done at any time
during operation.

Each time you turn the instrument on, it will
power up with the same settings that were
set when the unit was last turned off.

°c

°F

°C/°F

- 14 -

12. MIN AND MAX FUNCTION

Press the min/max key to toggle between
the minimum and maximum 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
the MIN/MAX reading stored, press and hold
the min/max key for 3 seconds.

13. AUTO OFF FUNCTION

The thermometer has a default auto off
function of 17 minutes.

To deactivate this function, press the
min/max key while turning the thermometer
on with the on/off key. “A.OFF no” flashes
to show indicate that the auto off function
has been disabled for that session.

Figure 9: Disabling the auto off function

- 15 -

14. CALIBRATION

The CAL function allows single point
calibration of the thermometer at 0°C (32°F)
to compensate for probe offset error. Use
the field calibration feature to improve
thermometer/probe accuracy.

The thermometer comes with a calibration
lock function to prevent accidental changes
to calibration settings. A field calibration can
only be performed when the function has
been unlocked. To unlock field calibration,
follow steps 1 through 4 in FIELD

CALIBRATION UNLOCK section.
To calibrate:

1. Pack sensing end of probe in a

container tightly packed with crushed ice
and filled with distilled water. Allow
temperature to stabilize.

2. Press and release the cal key for

3 seconds to enter the calibration
mode. The CAL indicator starts blinking.
Release the cal key.

3. If the measured temperature is from

–5°C to 5°C (23 to 41°F) when the
temperature reading is stable, press
the cal key.

The CAL indicator will stop blinking, and the
reading will be set to 0°C (32°F). The CAL
indicator will remain in display, indicating
that field calibration is now active.

If “Err” is displayed, the displayed reading
is outside the above limits.

NOTE: Press any key (except the cal key)
while in calibration mode to abort calibration.

- 16 -

15. CLEAR FIELD CALIBRATION

To clear user calibration:

1. Turn the thermometer off.

2. Hold the cal key down while pressing

the on/off key.

3. The measurement mode window

appears without the CAL indicator to
indicate that the user calibration has
been successfully cleared.

16. FIELD CALIBRATION UNLOCK

The calibration unlock feature enables field
calibration operation. To unlock field
calibration:

1. Turn the thermometer off.

2. Hold the cal key and hold key down

simultaneously, then press the on/off
key.

3. The “CAL” indicator appears

momentarily with the version-model
window to indicate that the user­calibration function has been unlocked
successfully (Figure 10).

Figure 10: Successful field calibration unlock

CAL

- 17 -

4. When the cal and hold keys are

released, the unit will go to
measurement mode (Figure 11).

Figure 11: Unit goes to measurement mode

17.

FIELD CALIBRATION LOCKOUT

The calibration lockout feature prevents any
field calibration changes. The lockout
remains in effect until an unlock has been
performed. To lock the field calibration
operation:

1. Turn the thermometer off.

2. Hold the cal key and °C/°F key down

simultaneously, then press the on/off
key. Do not release cal and °C/°F keys
until the measurement mode is on
display.

3. If field calibration lockout is successful,

the version-model window appears
without the CAL indicator (Figure 12).

Figure 12: Successful field calibration lockout

°c

STABLE

- 18 -

4. When the cal and °C/°F keys are

released, the unit will return to
measurement mode (Figure 13).

Figure 13: Unit returns to measurement mode

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

19. 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.

°c

STABLE

- 19 -

20. TROUBLESHOOTING

Problem

Cause

Solution

Power on
but no
display

Batteries not in
place or wrong
polarity.

Insert batteries.
or re-insert
batteries in
correct polarity.

“OPEN”
display
on LCD

Probe not
connected

Make sure
probe is firmly
connected.

“Ur” or
“Or”

display
on LCD

Measurement
over (Or) or
Under (Ur)
range

Ensure
temperature
taken is within

meter’s

specification.

Unstable
reading

1. Probe not
deep enough
in sample

2. Broken probe

1. Place probe
deeper in
sample.

2. Replace
probe.

Slow
response

Dirty probe

Clean probe

- 20 -

21. SERVICE

There are no internal adjustments or user
replaceable parts.

Note: Serial number label is located behind
the meter.

22. REPLACEMENT METER &
ACCESSORIES

Item

Catalog
number

Single-input RTD thermometer

91428-07

Rubber armor with stand

35427-80

Hands-free kit (two magnets
and a strap)

35427-85

General-purpose probe,
10 in. long x 0.188 in. dia,
10-second time constant.

08117-70

PTFE-coated general­purpose probe,

10 in. long x 0.145 in. dia,
15-second time constant.

08117-87

Penetration probe,
4 in. long x 0.188 in. dia,
sharp tip,
10-second time constant.

08117-85

Surface probe,
8 in. long with 0.25 in. dia,
aluminum and ceramic tip,
24-second time constant.

08117-75

Air/gas probe,
10 in. long sheath with 0.25
in. dia radiant heat shield.
4-second time constant.

08117-90

- 21 -

23. 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.

24.

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.

- 22 -

25. INNOCAL® CALIBRATION AND
REPAIR SERVICES

Optimum performance of your temperature­measuring 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!

Reliable Support

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

- 23 -

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 re-certify 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)

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.

- 24 -

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 will 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.

Calibration

test points

against NIST-

traceable

standards

Meter

only

Probe

only

System

(meter +

probe)*

Four test

points across

range of

instrument.

17000-04

17001-04

17002-04

InnoCal—The Choice of Quality

866-INNOCAL (866-466-6225)

InnoCalSolutions.com

For calibration services outside of North

America, please contact your Local

Distributors or Local Certification Body.

- 25 -

TECHNICAL ASSISTANCE
If you have any questions about the

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

For more information, contact:

Cole-Parmer

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

1065DGMAN_91428-07