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

.