DIGI-SENSE DIGI-SENSE 91428-03 Manual

Instruction Manual

Dual-Input J/K/T/E Thermocouple
Thermometer (Model 91428-03)

Dual-Input Data Logging
Thermocouple Thermometer

(Model 91428-04)

68X001352 Rev0 0717 1065DGMAN_91428-03,-04

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TABLE OF CONTENTS

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

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

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

4. BATTERY INSTALLATION ...................... 6

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

6.

OPTIONAL HANDS-FREE KIT

7. CONNECTING A THERMOCOUPLE ........ 9

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

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

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

17.

ALARMS SCREEN

18. DATA LOGGING SCREEN .................... 22

19.

CALIBRATION REPORT SCREEN

20. CLEAR / RESET SCREEN..................... 24

21.

MAINTENANCE

22.

CLEANING

23.

24. TROUBLESHOOTING ........................... 26

25.

26.

27.

28. INNOCAL

........................................... 25

BATTERIES

.......................................... 25

ACCESSORIES
WARRANTY

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

PRODUCT RETURN

®

CALIBRATION AND

REPAIR SERVICES .............................. 29

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

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

................................ 21

......... 23

.................................... 25

.................................... 27

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

- 1 -

INTRODUCTION

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

• Menu driven setup and operation

• Data logging for up to 1000 points

on model 91428-03, 2000 points
on model 91428-04

• USB output (model 91428-04 only)

• Differential temperature

measurements

• Operator selection of Celsius or
Fahrenheit scale

• Resolution of 0.1°C/F from
–199.9 to 999.9°

• Large backlit LCD with two lines

of four-digit display

• Hold feature for temporarily retain
a reading

• Displays min and max readings

• Field calibration capability

• Disabling of Auto-Off function

• Low-battery warning

• Two blade female ANSI mini-

connector input

• Operates with a wide selection of
probes

- 2 -

SAFETY PRECAUTIONS

WARNING:

1. This instrument is designed to
accept low level signals supplied
by standard Thermocouples. 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

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

- 3 -

SPECIFICATIONS

Thermocouple Thermometers

Type

Temperature range

Type J

–210°C to 1200°C

(–346°F to 2192°F)

Type K

–250°C to 1372°C

(–418°F to 2501°F)

Type T

–250°C to 400°C

(–418°F to 752°F)

Type E

–250°C to 1000°C

(–418°F to1832°)

Type R (model
91428-04 only)

0°C to 1768°C

(32°F to 3214°F)

Type S (model
91428-04 only)

0°C to 1768°C

(32°F to 3214°F)

Type N (model
91428-04 only)

–250°C to 1300°C

(–418°F to 2372°F)

Type B (model
91428-04 only)

200°C to 1800°C

(392°F to 3272°F)

Out-of-range display: - - -

-

Reso

lution:

0.1°/1° auto-ranging,

0.1°C/F from –199.9 to 999.9°,

1° outside this range

- 4 -

Accuracy:
Types J, K, T, E, and N:

Below –150°C (–238°F):
±0.25% of reading ±1°C (±0.25% ±0.7°F)
Above –150°C (–238°F):
±0.1% of reading ±0.4°C (±1% ±0.7°F)

Types R, S, and B:
±0.1% of reading ±1°C (±0.1% ±2°F)

Display:

Backlit dot matrix, 50mm x 37.2mm

Data logging:

Model 91428-03: 1000 points
Model 91428-04: 2000 points

Logging interval:

1 sec to 60 min

Min/Max/Avg function:

Yes

Auto Off (adjustable time):

Enable/disable option available

Stability criteria:

Yes, upon stability of 5 seconds

Display update

rate:

0.6

sec per up

date

Input:

Two thermocouples with ANSI connector

- 5 -

Input protection:
50V

rms

Storage:

–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

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 -

BATTERY INSTALLATION

The total battery life without backlighting
and alarm is about 400 hours. The
battery bar annunciator represents the
battery strength. An empty battery
annunciator indicates low battery
strength; a blinking battery annunciator
indicates that the batteries should be
replaced immediately.

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
thermocouple.

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.

- 7 -

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 -

OPTIONAL HANDS-FREE KIT

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