Fluke 65 User Manual

Introduction

This calibration information for the Fluke 65 Infrared Thermometer (also referred to as “the UUT”) provides
the following information:

®

Model 65

Infrared Thermometer

Calibration Information

• Safety information

• Specifications

• Basic maintenance

• Equipment required for performance tests and calibration

• Performance test procedures

• Calibration adjustment procedures

• List of replaceable parts

For complete operating instructions, refer to the Model 65 Infrared Thermometer Instruction Sheet.

Contacting Fluke

To locate an authorized service center, visit us on the World Wide Web at www.fluke.com. Or, call Fluke as
follows:

• USA: 1-888-99-FLUKE (1-888-993-5853)

• Canada: 1-800-36-FLUKE (1-800-363-5853)

• Europe: [phone]

• Japan: [phone]

• Singapore: [phone]

• Anywhere in the world: [phone]

PN 1554518 January 2000 ©2000 Fluke Corporation. All rights reserved. Printed in U.S.A. 1

Model 65

Calibration Information

Safety Information

To avoid possible personal injury:

• The information provided in this manual is for the use of qualified personnel

only. Do not perform the verification tests or calibration procedures
described in this manual unless you are qualified to do so.

• Performance of procedures other than those specified herein may result in

hazardous light exposure.

• Do not stare into the laser beam or direct it toward the eyes.

To avoid possible damage to the thermometer and to ensure correct
measurements:

• The Fluke 65 Infrared Thermometer contains parts that can be damaged by

static discharge. No procedure in this document requires the case to be
opened. If you do so, follow the standard practices for handling static
sensitive devices.

A Warning

Caution

• Do not drop the thermometer or subject it to violent shocks.

• Do not operate the thermometer near large electrical or magnetic fields.

• Do not touch the object with the thermometer.

• Keep the thermometer away from direct sunlight or strong sources of light,

hot objects (70 °C / 158 °F), high temperatures, high humidity, or dust during
use and storage.

• Do not apply sudden temperature changes to the thermometer. Before

taking measurements, wait for the thermometer to return to a stable
temperature.

• During performance tests and calibration, expose the thermometer to the

blackbody heat source only long enough to complete the measurement
(< 15 seconds). Between measurements, move the thermometer to an area
not affected by the heat source.

• Do not touch the focal lens.

• Condensation may form on the focal lens if the thermometer moves quickly

from a cold to a hot environment. Before taking measurements, wait for the
condensation to dissipate.

2

Specifications

Measurement Range −40 °C to +500 °C (−40 °F to +932 °F)
Operating Temperature (Ambient) 0 °C to +50 °C (+32 °F to +122 °F)
Storage Temperature −20 °C to +70 °C (−4 °F to +158 °F), without battery

Specifications

Display Resolution Below 200 °: 0.1°

Above 200

Measurement Accuracy Below 0 °C: ±5 °C (32 °F: ±9 °F)

Above 0 °C: ±2 °C (32 °F: ±4 °F)
Above 100 °C: ±2 % of reading
[Ambient: 25 °C ±3 °C (77 °F ±5 °F)]

Temperature Coefficient > 400 °C (752 °F): ±0.06 % reading

≤ 400 °C (752 °F): ±0.24 % reading
[Ambient: < 22 °C (72 °F); > 28 °C (82 °F)]

Response Time 0.8 second (for 95 % response)
Spectral Response 8 µm to 14 µm nominal
Field of View/Target Size 8:1; 25 mm (1 in) minimum spot size
Laser beam divergence < 0.01 radian
Repeatability ±1 % of reading or ±1 °, whichever is greater
Emissivity Fixed at 0.95
Humidity 10 % to 90 % RH non-condensing
Altitude Storage: 0 km to 12 km (40,000 ft)

°: 1°

Operating: 0 km to 3 km (10,000 ft)

Sensor Element Thermopile
Power Supply 2 AA alkaline batteries, not installed
Battery Life > 15 hours with laser and backlight activated (> 4000 individual measurements under

typical conditions)

Backlight Auto-on under low-light conditions
Hold Temperature value is held on the screen for 20 seconds
Dimensions 38.1 mm H × 63.5 mm W × 185.4 mm L

(1.5 in H × 2.5 in W × 7.3 in L)

Weight 283.5 g (10 oz)
Safety/Regulatory Compliance

Certification

Approval

US 21 CFR Subchapter J Part 1040.10
IEC 60825-1 (1998-01) Edition 1.1
EN 60825-1:1994/A11:1996

3

Model 65

Calibration Information

Maintenance

Installing the Batteries

Remove the holster to access the battery door. Figure 1 shows how to replace the batteries.

• Match the + and − polarities of the battery with the battery case.

• Do not attempt to recharge the batteries.

• Do not throw batteries into a fire.

• Follow local laws or regulations when disposing of batteries.

The

B indicates battery life remaining. Replace both batteries when I starts blinking.

Caution

Cleaning the Focal Lens

Do not use solvents to clean the focal lens. Blow off loose particles using clean, dry, compressed air. Gently
brush remaining debris away with a camel hair brush or high-quality lens tissue. The tissue may be
moistened with clean water.

Cleaning the Case and Holster

Use soap and water or a mild commercial cleaner. Wipe with a damp sponge or soft rag.

4

Figure 1. Replacing the Batteries

acd02f.eps

Required Equipment

Table 1 shows the equipment required for the performance tests and calibration adjustments.

Equipment Minimum Specifications Recommended Model

Required Equipment

Table 1. Required Equipment

Blackbody Calibration Source Temperature range: Ambient to 400 °C

Minimum aperture diameter: 76 mm (3.0 in)
Maximum temperature: ≥ 400 °C
Accuracy: ±0.5 °C to 100 °C

±0.5 % of reading above 100 °C

Setting Up for Performance Tests and Ca libration

1. Turn on the blackbody. Set it to room temperature and let it stabilize as recommended by the

manufacturer.

2. Let the UUT stabilize in the calibration area environment (25 °C ±3 °C) for a minimum of 20 minutes

before proceeding.

3. Verify that the UUT’s laser light is activated. When you press G, A appears in the display and the laser

spot is visible. If not, turn on the laser switch located under the battery hatch.

4. Place the UUT 8” from the front of the blackbody. Center the UUT’s thermopile on the blackbody’s

aperture. Note that the laser is offset from the thermopile.

Performance Tests

Use the following procedure to verify the performance of the UUT. If the UUT fails any of the tests, it needs
calibration or repair.

Mikron M315 Blackbody
Calibration Source with 0.95
emissivity er ror correction table

Caution

To avoid inaccurate readings during performance tests, expose the UUT to the
blackbody heat source only long enough to complete the measurement
(< 15 seconds). Between measurements, move the UUT to an area not affected
by the heat source.

1. Set up the UUT and the blackbody as described under “Setting Up for Performance Tests and

Calibration”.

2. The emissivity of the blackbody will be different than the emissivity of the UUT. Use the emissivity

error correction table provided for the blackbody to determine the proper set point for each temperature
in the first column of Table 2 at 0.95 emissivity.

3. For each temperature you determined in step 2, do the following:
a. Set the blackbody to the temperature. Let the blackbody stabilize.
b. Use the UUT to measure the temperature of the blackbody. Verify that the UUT reading is within

the limits given.

5

Model 65

Calibration Information

Table 2. Performance Test Values

Temperature at 0.95 Emissivity UUT Reading Limits

Room temperature Room temperature ±2 °C (±3.6 °F)

200 °C (392 °F) 196 °C to 204 °C (384.8 °F to 399.2 °F)
300 °C (572 °F) 294 °C to 306 °C (561.2 °F to 582.8 °F)
400 °C (752 °F) 392 °C to 408 °C (737.6 °F to 766.4 °F)

1. Room temperature must be 25 °C ±3 °C (77 °F ±5 °F).

2. Limits given are ±2 % of temperature at 0.95 emissivity.

Calibration Adjustments

The Model 65 Infrared Thermometer should be calibrated and, if necessary, adjusted annually using the
following procedure:

To avoid inaccurate readings during calibration, expose the UUT to the
blackbody heat source only long enough to complete the measurement
(< 15 seconds). Between measurements, move the UUT to an area not affected
by the heat source.

1, 2

Caution

Caution

Do not make any calibration adjustments when UUT is in factory calibration
mode (refer to Figure 2). Doing so will cause the UUT to give inaccurate
readings, and you will need to return the UUT to a Fluke service center for
recalibration.

1. Turn on the UUT.

2. Press and hold Fand D until all display segments are lit (about 5 seconds); then also press and hold
Eand G until the UUT displays 1_L (about 5 seconds), as shown in Figure 2. To scroll the calibration
menu, press F or D.

3. Set up the UUT and the blackbody as described under “Setting Up for Performance Tests and

Calibration”.

4. In the room-temperature adjustment mode (display shows 1_L), press G. The default room temperature
appears on the UUT display.

5. Verify that the UUT thermopile is centered on the blackbody target; then use F or D to adjust the UUT
reading down or up, respectively, to match the room temperature reading at 0.95 emissitivity.

6. When you have set the UUT reading to room temperature at 0.95 emissivity, press G. The UUT display
flashes briefly, then returns to the calibration selection mode.

7. Use the emissivity error correction table to adjust the blackbody for an output of 350 °C at 0.95
emissivity.

6

Room temperature
calibration mode

High temperature
calibration mode

MIN

MAX

°

C

°

F

Factory Calibration mode.

Caution

Do not change the factory
calibration setting

Calibration Adjustm ent s

End calibration
mode
Press to exit

calibration mode

Figure 2. Calibration Menu

acd01f.eps

7

Model 65

Calibration Information

8. Press D to enter the high-temperature adjustment mode (display shows 2_H), as shown in Figure 2.

9. Press G. The default high-temperature appears on the UUT display.

10. Aim the UUT at the blackbody target; then use F or D to adjust the UUT reading down or up,

respectively, to read 350 °C.

11. When you have set the UUT reading to 350 °C, press G. The UUT display flashes briefly, then returns to
the calibration selection mode.

If the high temperature you enter during calibration varies greatly from the measured
temperature, the UUT display will flash Err after you press G. In this case, press G again to
exit the error mode. Verify that the blackbody is working properly; then try the calibration
again.

12. Press D to enter the end-of-calibration mode (display shows E), as shown in Figure 2. Press G to exit the
calibration menu.

13. Test the UUT’s operation by running the performance tests given earlier under “Performance Tests”. If
the UUT fails the performance tests, recalibrate the UUT and try the tests again. If the UUT continues to
fail, return it to a Fluke Service Center for repair or replacement.

Note

Replacement Parts

Table 3 shows the replacement parts available from Fluke for the Model 65 Infrared Thermometer.

Table 3. Replacement Parts

Description Fluke Part Number

Top case 803566
Bottom case 803509
Battery door 803517
LCD lens 803558
End cap 803525
Keypad 803541
Softcase 670676
Holster 670612
AA battery, 1.5 V, carbon-zinc (2 required) 650181
AA battery, 1.5 V, alkaline (2 required) 376756

Model 65 Infrared Thermometer Instruction Sheet

Americas (English, Spanish, French, Portuguese)

801826
European I (English, French, German, Italian, Finnish, Dutch, )
European II (English, Norwegian, Spanish, Portuguese, Swedish, Danish)
Asian (English, Korean, Japanese, Simplified Chinese, Traditional Chinese, Thai)

Model 65 Infrared Thermometer Quick Reference Card

8

(English only) 802261

801842

801859
801834