Digi-Sense 35427-51 User manual

Thermistor Thermometer

MODEL NO. 93210-00

68X309902 R.0 08/03

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

CERTIFICA TE OF

CONFORMANCE

This thermometer was calibrated using
equipment traceable to the National Insti­tute of Standards and Technology (NIST).

This instrument conforms to
ITS-90.

The accuracy of the thermometer at the
time of calibration was within specifications
stated in the operating manual.

Model No.:__________________________
Serial Number:______________________
Date placed in service:________________

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

INTRODUCTION

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

• Operator selection of Celsius or Fahrenheit scale

• Resolution of 0.1°

• Four-digit LCD

• Hold feature for temporarily retaining a reading

• Field calibration capability

• Low battery warning

• Built-in tilt stand for easy hands-free operation

• Standard 1/4 inch (6.3mm) phone jack connector
input

• Operates with a wide selection of probes

1

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

SAFETY PRECAUTIONS

DANGER

ALSO BE PRESENT AT THE BATTERY TERMI­NALS. ALWAYS DISCONNECT THE THERMO­COUPLE WHEN CHANGING BATTERIES.

WARNING

LOW LEVEL SIGNALS SUPPLIED BY STAN­DARD 400 SERIES THERMIST ORS. UNDER NO
CIRCUMSTANCES SHOULD THE INPUT V O LT­AGE EXCEED THE SPECIFIED 10 V RMS.

CAUTION

MICROWAVE OVENS OR ANY ABNORMALLY
HOT OR COLD AREAS.

CAUTION

STRUMENT . DEAD BATTERIES CAN LEAK AND
CAUSE DAMA GE T O UNIT.

VOLTAGES PRESENT AT
THE THERMISTORS MAY

THIS INSTRUMENT IS

DESIGNED TO ACCEPT

DO NOT USE OR STORE
THIS INSTRUMENT IN

WEAK BA TTERIES SHOULD
NOT BE LEFT IN THE IN-

2

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

SPECIFICATIONS

THERMSITOR PROBES

YSI 400 series (2252 ohm at 25°C)
–40.0 °C to 125.0 °C (–40.0 °F to 257.0 °F )

Out of range display: “Ur” , “Or” , “oPEn”
Resolution: 0.1°
Accuracy

+0.2 °C (+0.4 °F)

Display: 4-digit LCD with 0.4 inch high numerals.
Display update rate: 0.5 sec per update.
Input: One probe with 1/4 inch (6.3mm) phone

jack connector.

Input Protection: 10V rms
Battery: Two AA, 1.5V alkaline ANSI-L40,

IEC-LR6.

Battery Life: 200 hours continuous, typical.
Low battery indication

Battery Symbol on when 8 to 10 hours of
battery life remains.

Auto Shutoff: 17 minutes after last key press.
Operating:

Stated accuracy: 18°C to 28°C (64°F to 82°F)
Useful range: 0°C to 40°C (32°F to 104°F)
Storage: –40°C to 65°C

Humidity: 10% to 90%

(–40°F to 149°F)

3

0867-0868body.p65 8/15/01, 1:05 PM3

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Dimensions

3 cm D x 8.4 cm W x 15.8 cm H
(1.2 in x 3.3 in x 6.2 in)

Weight with batteries: 227 g rams (8 ounces)
Ingress protection: Meets IEC-529 IP-54 for dust-

and water-resistant enclosures.

Compliance (For CE Mark): EN61326-1/A1: 1998

(EU EMC Directive)

4

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

BATTERY INSTALLATION AND

REPLACEMENT

DANGER

ALSO BE PRESENT AT THE BATTERY TERMI­NALS. ALWAYS DISCONNECT THE PROBE
WHEN CHANGING BA TTERIES.

CAUTION

INSTRUMENT. DEAD BATTERIES CAN LEAK
AND CAUSE D AMAGE TO UNIT.

VOLTAGES PRESENT AT
THE THERMISTOR MAY

WEAK BA TTERIES SHOULD
NOT BE LEFT IN THE

5

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

If battery indicator turns on, battery life is approxi­mately 8 to 10 hours.

See SPECIFICA TIONS f or battery type.

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

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

3. Remove the two AA batteries.

4. Insert two new batteries observing polarity.

5. Install cover and tighten screw.

6

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

CONNECTING A THERMISTOR

Use the correct thermistor (series 400) for your in­strument. Using an incorrect probe type will result
in erroneous readings. (Series 500 thermistor
probes may be used along with the supplied cor­rection chart to convert meter readings to actual
temperature). Insert the 1/4 inch plug into the mat­ing connector on the top of the instrument.

7

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

8

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

9

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

OPERATION

1. Press the ON/OFF key. The thermometer per­forms a self-test and all display digits and indi­cators, as shown below, should remain on for
approximately two seconds.

2. If a probe is not connected or if the probe is de­fective, the displa y will indicate “oPEn”.

3. Select °C or °F by pressing the °C/°F key. Tem­perature scale can be switched at any time. The
thermometer retains the last selected scale the
next time you turn the power on.

4. 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.

When taking temperature measurements, allow
time for the reading to stabilize. Multiplying the time
constant of the probe by 5 will give you the ap­proximate time required.

If desired, press the HOLD key to retain the read­ing on the display . Press HOLD key again for nor­mal operation.

The display will show “Ur” (under range) or “Or”
(over range) if the temperature reading is out of
range of the instrument.

10

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

FIELD CALIBRATION

The thermometer is factory calibrated and does not
require calibration before use. The CAL function al­lows single point calibration of the thermometer, at
0°C (32°F) to compensate for probe offset 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.

1. Follow steps 1 through 4 in FIELD CALIBRA-
TION CLEAR/UNLOCK section.

2. Pack sensing end of probe in a container tightly
packed with crushed ice and filled with distilled
water. Allow temperature to stabilize.

3. Press and release the CAL key to enter the cali­bration mode.

4. The display will momentarily show “CA” and then
the temperature reading starts blinking.

5. If the measured temperature is from –5°C to 5°C
(23 to 41°F), when the temperature reading is
stable, press the HOLD key to confirm
calibration.

The display will momentarily show “CO” and the
reading will be set to 0°C (32°F). The CAL indi­cator will turn on, indicating a field calibration is
active.

The field calibration is automatically

locked as well.

If “Err” is displayed, either the displa yed reading is
outside the above limits or the batteries are weak.

11

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

FIELD CALIBRA TION CLEAR/UNLOCK

The calibration clear/unlock feature will cancel any
previous field calibration (the thermometer reverts
to the default factory calibration) and also enables
the field calibration operation.

1. Turn the thermometer off.

2. Hold the CAL key down while pressing the ON/
OFF key .

3. Unit will first display 8888 then the firmware ver­sion number

4. When the CAL key is released, the unit will re­turn to measurement mode.

FIELD CALIBRA TION LOCKOUT

The calibration lockout feature prevents any field
calibration changes. The lockout remains in eff ect
until a clear/enable has been performed. Use the
following procedures to lockout the field calibration
operation.

Lockout Procedure

1. Turn the thermometer off.

2. Hold the HOLD key down while pressing the ON/
OFF key .

3. Unit will first display 8888 then the firmware ver­sion number

4. When the HOLD key is released, the unit will
display 8888 and then turn off. (If field calibra­tion is already locked, the unit will return to mea­surement mode.)

.

.

12

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

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 e xcessive fluid.

BATTERIES

If there is no display when the thermometer is
turned on, check condition of the two AA batteries.
Also check that the battery terminals are clean and
batteries are properly installed. If replacement is
necessary, ref er to the BATTERY INSTALLATION
AND REPLACEMENT section for replacement
procedure.

SERVICE

There are no internal adjustments or user­replaceable parts.

Note: Serial number label is located inside battery
compartment.

A-1925-37

Printed in Singapore

68X309902

13

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Rev. 0

WARRANTY

The Manufacturer warrants this product to be
free from significant deviations from published
specifications. 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.

The product is supplied with a 3-year warranty.

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 prod­uct carefully and insure it against possible dam­age or loss. Any damages resulting from im­proper packaging are your responsibility.

TECHNICAL ASSISTANCE

If you have any questions about the use of this
product, contact the Manufacturer or authorized
seller.

Trademarks bearing the ® symbol in this publication are
registered in the U.S. and in other countries.

A-3477-71

68X309902

Find Quality Products Online at: [e-mail]

Printed in Singapore

www.GlobalTestSupply.com

Rev . 0