Fluke Hart Scientific 9101 User Manual

Via Acquanera, 29 22100 Como
tel. 031.526.566 (r.a.) fax 031.507.984

[e-mail] www.calpower.it

Hart Scientific

9101 Zero Point

Dry-W ell

User Manual

Rev. 5C1501

Fluke Corporation, Hart Scientific Division

799 E. Utah Valley Drive • American Fork, UT 84003-9775 • USA
Phone: [phone] • Telefax: +1.801.763.1010
E-mail: [e-mail]

www.hartscientific.com

Subject to change without notice. • Copyright © 2005 • Printed in USA

Rev. 5C1501

Table of Contents

1 Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2.1 WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2.2 CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.3 Authorized Service Centers. . . . . . . . . . . . . . . . . . . . . . 3

2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 Specifications and Environmental Conditions . . . . . . . . . . 7

3.1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.2 Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . 7

3.3 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.2 Set up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.3 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5 General Operation . . . . . . . . . . . . . . . . . . . . . . . . 11

5.1 Set up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5.2 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5.3 Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

6 Test Probe Calibration . . . . . . . . . . . . . . . . . . . . . . 13

6.1 Calibration Methods. . . . . . . . . . . . . . . . . . . . . . . . . 13

6.1.1 Comparison Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6.1.2 Calibration of Multiple Probes . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.2 Dry-Well Characteristics . . . . . . . . . . . . . . . . . . . . . . 14

6.2.1 Vertical Gradient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.2.2 Stabilization and Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . 15

8 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

9 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . 19

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1 Before You Start

1.1 Symbols Used

Table 1 lists the International Electrical Symbols. Some or all of these symbols
may be used on the instrument or in this manual.

Tabl e 1 International Electrical Symbols

Symbol Description

AC (Alternating Current)

AC-DC

Battery

CE Complies with European Union Directives

1 Before You Start

Symbols Used

DC

Double Insulated

Electric Shock

Fuse

PE Ground

Hot Surface (Burn Hazard)

Read the User’s Manual (Important Information)

Off

On

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9101 Zero Point Dry-Well

User’s Guide

Symbol Description

Canadian Standards Association

OVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 per IEC1010-1 re
fers to the level of Impulse Withstand Voltage protection provided. Equipment of
OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from
the fixed installation. Examples include household, office, and laboratory appliances.

C-TIC Australian EMC Mark

The European Waste Electrical and Electronic Equipment (WEEE) Directive
(2002/96/EC) mark.

1.2 Safety Information

Use this instrument only as specified in this manual. Otherwise, the protection
provided by the instrument may be impaired.

The following definitions apply to the terms “Warning” and “Caution”.

• “WARNING” identifies conditions and actions that may pose hazards to
the user.

• “CAUTION” identifies conditions and actions that may damage the in­strument being used.

1.2.1 WARNINGS

To avoid personal injury, follow these guidelines.

•

Before initial use, or after transport, or after storage in humid or semi-hu
mid environments, or anytime the instrument has not been energized for
more than 10 days, the instrument needs to be energized for a “dry-out”
period of 2 hours before it can be assumed to meet all of the safety re
quirements of the IEC 1010-1. If the product is wet or has been in a wet
environment, take necessary measures to remove moisture prior to apply
ing power such as storage in a low humidity temperature chamber operat
ing at 50 degree centigrade for 4 hours or more.

•

Use only a grounded AC mains supply of the appropriate voltage to
power the instrument. The dry-well requires a maximum of 1 amp, 50/60
Hz, 115/230 VAC (±10%).

•

DO NOT connect this unit to a non-grounded, non-polarized outlet.

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DO use a ground fault interrupt device.

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HIGH VOLTAGE is used in the operation of this equipment. SEVERE
INJURY or DEATH may result if personnel fail to observe safety pre

cautions. Before working inside the equipment, turn power off and dis
connect power cord.

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DO NOT use this unit in environments other than those listed in the

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user’s manual.

DO NOT use this unit for any application other than calibration work.

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Follow all safety guidelines listed in the user’s manual.

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Calibration Equipment should only be used by Trained Personnel.

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1.2.2 CAUTIONS

To avoid possible damage to the instrument, follow these guidelines.

Operate the instrument in room temperatures between 5-50°C (41-122°F).

•

Allow sufficient air circulation by leaving at least 6 inches of space be
tween the instrument and nearby objects. Overhead clearance needs to al
low for safe and easy insertion and removal of probes for calibration.

The dry-well is a precision instrument. Although it has been designed for

•

optimum durability and trouble free operation, it must be handled with
care. The instrument should not be operated in excessively wet, oily,
dusty, or dirty environments. It is important to keep the wells of the in­strument clean and clear of any foreign matter. Do not operate near flam­mable materials.

• DO NOT use fluids to clean out the well.

• If a mains supply power fluctuation occurs, immediately turn off the in-

strument. Power bumps from brown-outs and black-outs could damage
the instrument. Wait until the power has stabilized before re-energizing
the instrument.

1 Before You Start

Authorized Service Centers

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1.3 Authorized Service Centers

Please contact one of the following authorized Service Centers to coordinate
service on your Hart product:

Fluke Corporation, Hart Scientific Division

799 E. Utah Valley Drive

American Fork, UT 84003-9775

USA

Phone: [phone]

Telefax: +1.801.763.1010

E-mail: [e-mail]

Fluke Nederland B.V.

Customer Support Services

Science Park Eindhoven 5108

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9101 Zero Point Dry-Well

User’s Guide

Fluke Int'l Corporation

5692 EC Son

NETHERLANDS

Phone: [phone]

Telefax: [phone]

E-mail: [e-mail]

Service Center - Instrimpex

Room 2301 Sciteck Tower

22 Jianguomenwai Dajie

Chao Yang District

Beijing 100004, PRC

CHINA

Phone: [phone]

Telefax: [phone]

E-mail: [e-mail]

Fluke South East Asia Pte Ltd.

Fluke ASEAN Regional Office

Service Center

60 Alexandra Terrace #03-16

The Comtech (Lobby D)

118502

SINGAPORE

Phone: [phone]

Telefax: [phone]

E-mail: [e-mail]

When contacting these Service Centers for support, please have the following
information available:

•

Model Number

•

Serial Number

•

Voltage

•

Complete description of the problem

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2 Introduction

2 Introduction

The Hart model 9101 zero point dry-well is a precision instrument which main
tains a constant temperature at 0°C. It can be used to provide a stable zero ref
erence for thermocouples or for calibrating temperature probes.The 9101 has
three wells so that multiple probes may be calibrated and compared at once.

The 9101 uses solid-state electronics to control the temperature of an aluminum
block. The block temperature is monitored with a high sensitivity thermistor
sensor. The controlling circuit adjusts the current to thermoelectric modules
which cool the block maintaining a stable temperature. Since the current to the
cooling modules is constant DC there is no problem with induced EMF noise in
the user’s probes or thermocouples due to switching transients of the cooling
circuits. Because the temperature control is done with solid-state electronics the
9101 is rugged and stable. The zero point dry-well will not be damaged by
subfreezing temperatures during shipping or storage.

The 9101 is calibrated at the factory for NIST traceable accuracy. It may also
be easily calibrated in the field to the user’s own standard.

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Figure 1 9101 Zero Point Calibrator

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3 Specifications and Environmental Conditions

3 Specifications and Environmental

Conditions

3.1 Specifications

Specifications

Temperature

Accuracy

Stability

Temperature
Coefficient

Stabilization Time

Operable
temperature
range

Accuracy
temperature
range

Cooling time:

Well

Power

Dimensions

0°C

±0.02°C typical, ±0.05°C maximum (18°C–25°C ambient)

±0.005°C

±0.005°C/°C amb.

Approximately 30 minutes (the ready lamp indicates stable control at 0°C)

5 to 27°C, 40 to 80°F

18 to 25°C, 64 to 77°F

15 to 30 min., Depending on ambient

3 wells, 2 outside wells .25" dia. X 6" deep, center well .280" dia x 6" deep

115 VAC (±10%)1 A or 230 VAC (±10%) 0.5 A, 50/60 Hz, 125 W

12.25"H x 8.5”W x 5.75"D (311 x 216 x 146 mm)

3.2 Environmental Conditions

Although the instrument has been designed for optimum durability and trou
ble-free operation, it must be handled with care. The instrument should not be
operated in an excessively dusty or dirty environment. Maintenance and clean
ing recommendations can be found in the Maintenance Section of this manual.

The instrument operates safely under the following conditions:

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temperature range: 5–50°C (41–122°F)

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ambient relative humidity: maximum 80% for temperature <31°C, de
creasing linearly to 50% at 40°C

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pressure: 75kPa–106kPa

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mains voltage within ±10% of nominal

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vibrations in the calibration environment should be minimized

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altitude does not effect the performance or safety of the unit

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9101 Zero Point Dry-Well

User’s Guide

3.3 Warranty

Fluke Corporation, Hart Scientific Division (Hart) warrants this product to be
free from defects in material and workmanship under normal use and service
for a period as stated in our current product catalog from the date of shipment.
This warranty extends only to the original purchaser and shall not apply to any
product which, in Hart's sole opinion, has been subject to misuse, alteration,
abuse or abnormal conditions of operation or handling.

Software is warranted to operate in accordance with its programmed instruc
tions on appropriate Hart products. It is not warranted to be error free.

Hart's obligation under this warranty is limited to repair or replacement of a
product which is returned to Hart within the warranty period and is determined,
upon examination by Hart, to be defective. If Hart determines that the defect or
malfunction has been caused by misuse, alteration, abuse or abnormal condi
tions or operation or handling, Hart will repair the product and bill the pur
chaser for the reasonable cost of repair.

To exercise this warranty, the purchaser must forward the product after calling
or writing an Authorized Service Center (see Section 1.3) for authorization.
The Service Centers assume NO risk for in-transit damage.

THE FOREGOING WARRANTY IS PURCHASER'S SOLE AND EXCLU­SIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EX­PRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY
IMPLIED WARRANTY OR MECHANTABILITY, OR FITNESS FOR ANY
PARTICULAR PURPOSE OR USE. HART SHALL NOT BE LIABLE FOR
ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAM­AGES OR LOSS WHETHER IN CONTRACT, TORT, OR OTHERWISE.

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4 Quick Start

4.1 Unpacking

4 Quick Start

Unpacking

Unpack the dry-well carefully and inspect it for any damage that may have oc
curred during shipment. If there is shipping damage, notify the carrier
immediately.

Verify that the following components are present:

9101 Dry-well

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2130, Well tube sizing kit

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Power Cord

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User’s Guide

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Report of Calibration

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Calibration Label

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4.2 Set up

Place the 9101 zero point dry-well upright on a flat stable surface. The area
around the instrument must be clear to allow adequate air circulation. For best
results operate the dry-well in room of constant temperature between 18 to
25°C (64 to 77°F) free from drafts. Stable ambient temperatures allow stable
well gradients and less drift.

Turn on the power to the calibrator by toggling the power switch on. The fan
should begin quietly blowing air through the instrument. The amber LED will
light when the unit is energized. The green LED will light when the unit is
ready to use. The unit is not at the correct temperature until the green LED is
illuminated.

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4.3 Power

Connect the power cord provided into the instrument and plug the other end
into a power socket of specified voltage. Normally this will be 115 VAC,
+10%, 50/60 Hz. If specified upon ordering the instrument may optionally be
configured to operate at 230 VAC (±10%).

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5 General Operation

5.1 Set up

Place the 9101 zero point dry-well upright on a flat stable surface. The area
around the instrument must be clear to allow adequate air circulation. For best
results operate the dry-well in room of constant temperature between 18 to
25°C (64 to 77°F) free from drafts. Stable ambient temperatures allow stable
well gradients and less drift.

5.2 Cooling

5 General Operation

Set up

Turn on power by pressing the switch on the top of the instrument to the on po
sition. Notice that the amber POWER indicator light turns on and the fan be
gins circulating air. The dry-well will begin to cool the well until it reaches 0°C
andstabilizes.Typicallyittakes15to30minutesfortheblocktoreach0and
stabilize, longer at higher ambient temperatures. When the block has reached 0
and stabilized the green READY indicator light will turn on and the instrument
is ready for use.

5.3 Measurement

When the instrument is ready insert the probe into one of the three well holes at
the top of the instrument. The probe should be inserted the full depth of the
well since the temperature is most accurate at the bottom. The probe must make
good contact with the bottom of the well. A little heat conduction grease on the
probe may help. It also helps to apply a small constant sideways and down­wards force on the probe. After inserting the probe allow approximately 10
minutes for the temperature to stabilize. At this point the probe may be mea
sured for accuracy or used as a stable zero reference.

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6 Test Probe Calibration

For optimum accuracy and stability, allow the calibrator to warm up for 10
minutes after power-up and then allow adequate stabilization time after reach
ing the set-point temperature. After completing calibration, allow the block to
cool before switching the power off.

6.1 Calibration Methods

6 Test Probe Calibration

Calibration Methods

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Never introduce any foreign material into the probe hole of the insert. Flu
ids, etc., can leak into the calibrator causing damage to the calibrator or
binding and damage to your probe.

6.1.1 Comparison Calibration

Comparison calibration involves testing a probe against a similar reference
probe. The advantage to this method is that better accuracy can be achieved
since errors due to dry-well inaccuracy, stem effect, and drift can be reduced.

After inserting the probes to be calibrated, allow sufficient time for the probes
to settle and the temperature of the dry-well to stabilize.

It is best if both the reference probe and the probe under test are the same size
and construction. Using probes with different lengths, diameters and materials
will have different stem effects causing an unknown temperature difference. All
dry-wells have horizontal and vertical gradients that change with temperature .
This is an unknown variable which can be factored out if probes are the same
type, length, diameter, and material. Probes should be inserted to the same
depth in the well.

The following procedure can be used to calibrate a probe against a reference
while eliminating error due to temperature gradients between wells.

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Place the reference probe in one well.

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Place the probe to be calibrated, the unit under test (UUT), in another
well.

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With the reference inserted into one well and the probe under test inserted
into a second well, make measurements of each.

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Swap the locations of the reference probe and probe under test. Allow
plenty of time for thermal settling.

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Make another set of measurements of the reference probe and the probe
under test.

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Average the two measurements of the reference probe. Average the two
measurements of the probe under test. Averaging the two measurements
in this way eliminates error due to temperature gradients between the two
wells.

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9101 Zero Point Dry-Well

User’s Guide

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This method can be used with different types of probes but the user must deter
mine the uncertainty of the measurement.

6.1.2 Calibration of Multiple Probes

Fully loading the calibrator with probes increases the time required for the tem
perature to stabilize after inserting the probes. Be sure that the temperature has
stabilized before starting the calibration.

Multiple probes may be calibrated simultaneously using either the direct or
comparison calibration method. Stem effect will cause less error in the compar
ison calibration method than with the direct calibration method.

6.2 Dry-Well Characteristics

Understanding the thermal characteristics of the dry-well calibrator can help
you achieve the best accuracy and efficiency possible.

Compare the averaged measurement of the probe under test with the aver
aged measurement of the reference probe.

For best results repeat the test several times at the same temperature and
at different temperatures.

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6.2.1 Vertical Gradient

There is a temperature gradient vertically in the test well. The heater has been
applied to the block in such a way as to compensate for nominal heat losses out
of the top of the dry-well and minimize vertical temperature gradients. How­ever, actual heat losses will vary depending on the number and types of probes
inserted into the calibrator and the block temperature. For best results, insert
probes the full depth of well.

6.2.2 Stabilization and Accuracy

The stabilization time of the dry-well calibrator will depend on the conditions
and temperatures involved. Typically, the dry-well will be stable to 0.1°C
within 5 minutes of reaching the set-point temperature as indicated by the dis
play. Ultimate stability will be achieved 10 to 20 minutes after reaching the set
temperature.

Inserting a cold probe into a well will require another period of stabilization de
pending on the magnitude of the disturbance and the required accuracy. For ex
ample, inserting a ¼ inch diameter room probe at temperature into a sleeve at
300°C will take approximately 5 minutes to be within 0.1°C of its set-point and
will take 10 minutes to achieve maximum stability.

Decreasing the time required for the calibration process can be accomplished
by knowing how soon to make the measurement. It is recommended that typi
cal measurements be made at the desired temperatures with the desired test
probes to establish these times.

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7 Calibration Procedure

The user may easily calibrate the 9101 zero point dry-well at any time to agree
more closely with a particular standard thermometer. To calibrate the instru
ment insert the standard probe into the center well as discussed in Section5.3
and allow the temperature to stabilize. At the back of the 9101 is a small hole
covered by a “calibration void if removed” sticker, which allows access to a
trimmer potentiometer used to set the temperature. Insert a small adjustment
tool or screwdriver through the hole and slowly turn the trimmer until the stan
dard measures 0.0°C. Allow a few minutes between adjustments to allow time
for the temperature to change and stabilize.

7 Calibration Procedure

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8 Maintenance

8 Maintenance

The calibration instrument has been designed with the utmost care. Ease of op
eration and simplicity of maintenance have been a central theme in the product
development. Therefore, with proper care the instrument should require very
little maintenance. Avoid operating the instrument in an oily, wet, dirty, or
dusty environment.

If the outside of the instrument becomes soiled, it may be wiped clean

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with a damp cloth and mild detergent. DO NOT use harsh chemicals on
the surface which may damage the paint.

It is important to keep the well of the calibrator clean and clear of any for

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eign matter. DO NOT use fluid to clean out the well.

The dry-well calibrator should be handled with care. Avoid knocking or

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dropping the calibrator.

DO NOT slam the probe stems into the well. This type of action can

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cause a shock to the sensor.

• If a hazardous material is spilt on or inside the equipment, the user is re-

sponsible for taking the appropriate decontamination steps as outlined by
the national safety council with respect to the material.

• If the mains supply cord becomes damaged, replace it with a cord with

the appropriate gauge wire for the current of the instrument. If there are
any questions, call a Hart Scientific Authorized Service Center for more
information.

• Before using any cleaning or decontamination method except those rec-

ommended by Hart, users should check with a Hart Scientific Authorized
Service Center to be sure that the proposed method will not damage the
equipment.

•

If the instrument is used in a manner not in accordance with the equip
ment design, the operation of the dry-well may be impaired or safety haz
ards may arise.

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9 Troubleshooting

If the amber LED on the top of the unit is off

• Check that there is power to the unit. If there is power to the unit, contact

an Authorized Service Center for further assistance.

9 Troubleshooting

Via Acquanera, 29 22100 Como
tel. 031.526.566 (r.a.) fax 031.507.984

[e-mail] www.calpower.it

19