Usage:
The principal application for the infrared thermometer is quick, easy, non-contact temperature comparisons; although the instrument can be used to measure absolute single temperatures. Some common applications of the infrared thermometer are: 1) To measure the temperature drop across a radiator or other heat exchangers; 2) locate leaks in the bushings of Sealed and Lubricated Track; 3) locate leaks or restrictions in hydraulic systems.
Components Of The 6V5000 Infrared Thermometer Group
Specifications
Installation Of Batteries
1. Remove two screws (1) and cover (2) from the right side of the handle. Remove the plastic protector from one or both of the battery connectors.
2. Connect either one or two 9 Volt alkaline batteries to the snap connectors. NOTE: The instrument will operate correctly with only one battery but usage time will be reduced by 50%.
3. If only one battery is used, the plastic protector must be installed on the battery connector not being used. This will prevent a possible short circuit of the terminals, thereby causing the instrument to be inoperative and/or give short battery life.
4. Move slide switch (3) forward toward the tip of the barrel. The display should flash 1.00. If there is no display, the instrument is not receiving power and the batteries are probably not satisfactory. The words "LO BAT" will be displayed when the batteries are near discharge; replace the batteries. Refer to troubleshooting on page 16 if there are other displays or conditions.
5. Press emissivity "down" button (5) until the display begins counting down; for example, 1.00, .99, .98, .97, etc. Press emissivity "up" button (6) until the display reads 1.00.
6. Install battery cover (2) and the two screws.
7. Push SCALE SELECT button (7) several times to cycle the indicator arrow from °F to °C to
to °F.
8. Push DIFF TEMP SELECT button (8) several times to cycle from MAX-MIN to AVG.
9. Push DISPLAY SELECT button (9) several times to cycle the indicator arrow from TEMP to AVG, MAX, MIN, DIFF and back to TEMP. The instrument is now ready for use.
Controls And Functions
For storage purposes, there is a master ON-OFF switch (1) on the right side of the handle just above the battery cover. This switch disconnects all power to the instrument. The two 9 Volt batteries will provide power to the display and memory for several thousand hours; therefore, it is not necessary to use the master ON-OFF switch between temperature readings even if they are several hours apart. Only use the master switch for storage. The words "LO BAT" will be displayed when batteries are near discharge.
Red trigger switch (2) on the front of the handle is used to turn the instrument on and off during normal use. This spring-loaded switch is off when released. Hold the switch in to measure temperature.
Two new 9 Volt alkaline batteries (3) will allow approximately 16 hours of continuous temperature reading. This is equal to 5000 to 6000 typical field application readings.
The display controls are "button" switches sealed within the display board. Each function switch is located in the pad area of the instrument. These switches are DISPLAY SELECT (4), DIFF TEMP SELECT (5), SCALE SELECT (6) and EMISSIVITY (7).
Display Select Function
Temperature, average temperature, maximum temperature, minimum temperature and the difference between maximum and minimum temperature or last two averages can be displayed in sequence by pressing DISPLAY SELECT button (4). The display function is indicated by the display select arrow. After a two second calibration cycle, the arrow will flash two times per second (thermometer takes four measurements per second) for all functions while trigger switch (2) is held in. The instrument will automatically recalibrate every 15 seconds.
TEMP function displays current temperature while trigger is depressed, and last temperature recorded when trigger is released. If the display shows "8888", the apparent temperature is outside the measurement range of the instrument.
AVG function displays the average temperature. Each new temperature reading is added to a summation register which is divided by the total number of readings. For averages below 500°C (1000°F), the average temperature is calculated and displayed to the nearest 0.1 degrees.
MAX function displays the highest temperature in memory (or as data is taken).
MIN function displays the lowest temperature in memory (or as data is taken).
DIFF function displays the temperature difference in memory (or as data is taken). There are two modes for temperature difference:
- 1) MAX - MIN mode indicates the difference between the maximum and minimum temperature in memory. Each time the trigger is depressed, the maximum and minimum memories are cleared and new maximum and minimum temperatures are stored.
- 2) AVG mode indicates the difference between the previous average temperature and the current average temperature. Each time the trigger is depressed, the oldest average is cleared and a new average is formed. Only the two newest averages are retained in memory. Only the newest average is displayed. The previous average can be calculated by adding or subtracting (this is determined by the arithmetic displayed sign) the average temperature difference displayed to/from the average temperature displayed. Two temperature readings are necessary in this mode for the display to be valid.
Diff Temp Select Function
The DIFF TEMP SELECT button (5) is used to select the type of differential temperature to be displayed when the DISPLAY SELECT function is in the DIFF position. For general applications, use the MAX-MIN position. If average temperature differentials are needed, use the AVG position. The function of each position is further described below.
When DIFF TEMP SELECT switch (5) is in the MAX-MIN position, as indicated by the arrow, all previous readings and calculations are cleared from memory each time the trigger switch is depressed. This results in a new set of independent measurements and calculated values. Each time the trigger is depressed, the display shows "CCCC" to indicate the memory has been cleared.
Each time the trigger is depressed with DIFF TEMP SELECT switch (5) in the AVG position, the instrument will use stored average data from the previous trigger pull and the current average temperature to compute the average temperature differential of the two targets. The oldest average in memory will be replaced by the newest average each time the trigger is depressed. The instrument will then calculate a new average temperature differential. Only the previous and current average temperatures can be compared for differential temperature. Each time the trigger is depressed in this mode, all memory registers are cleared except for the newest average in the AVG memory register; however, "CCCC" will not appear in the display as it did when switch (5) was in the MAX-MIN position. Instead, the display will show either zeroes or the last temperature from the previous measurement cycle for the two second calibration period.
Scale Select Function
The SCALE SELECT switch (6) is used to determine whether the display will indicate temperature in degrees Fahrenheit (°F) or Celsius (°C). If switch (6) is put in the
position, the emissivity setting will be shown on the display.
Emissivity
The emissivity setting can be changed when SCALE SELECT switch (6) is in the
position and the trigger is released. Press button
to lower the emissivity setting in increments of .01. Press button
to raise the emissivity setting in increments of .01. If the emissivity is to be changed more than .05, hold the button on. The first five increment changes will be slow; after this, changes will be at an accelerated rate. The emissivity can be set to a maximum of 1.00 and a minimum of 0.10.
The emissivity setting can also be changed when select switch (6) is in the °F or °C position. This feature is used for objects with known temperatures and unknown emissivities; see page 11.
General Information
If a shiny surface is to be measured, refer to "Setting Emissivity" on page 11 for the correct setting. When a hot object, such as the sun, is being reflected off a shiny surface, it will cause the indicated temperature to be high. The temperature of a chrome cylinder or rod is difficult to measure because the angle of reflection is difficult to control. One solution is to put masking tape on the area to be measured. This will give an emissivity of .95 and prevent reflection.
If water droplets get on the plastic film covering the end of the barrel, they will absorb infrared energy and cause a low temperature indication. IMPORTANT: The plastic film prevents dust from entering optical system and must be in place to ensure proper calibration. If film is damaged, replace as shown on page 14.
When the instrument "sees" a temperature either above or below its apparent range, the display will be "8888". This can be caused by an emissivity setting which is not correct for the target being measured, or a reflected high temperature (such as the sun) off a chrome surface.
When the battery is low, but before the low battery indicator comes on, the display could indicate "CC80" or "CC00" instead of "CCCC" when trigger is pulled. This is an early indication of low battery condition.
If the instrument is exposed to ambient temperatures between 85°C and 90°C (185°F and 194°F), the display will become completely black. The display will recover when the temperature is reduced; however, the life expectancy of the display will be reduced. If the instrument is exposed to ambient temperatures above 100°C (212°F), the display will be permanently damaged. Temperatures below 0°C (32°F) will cause the display update rate to slow down. At temperatures below -12°C (10°F), the display may become fixed and not change. This is not permanent, and the display will become functional when the ambient temperature is increased.
Thermal Shock
Thermal shock is a rapid change in ambient temperature. When the 6V6125 Thermometer is subjected to a rapid ambient temperature change [greater than .5°C (1°F) per minute], such as going from a warm shop at 20°C (68°F) to an outside temperature of 0°C (32°F), a special electronic compensating circuit begins to function. This circuit causes the displayed temperature to be very accurate without waiting an hour or longer for the instrument to stabilize at the new temperature. Within five minutes after a thermal shock of 25°C (45°F) or less, the special compensating circuitry will cause the instrument to have an accuracy of better than ±5% of reading, when the measured source temperature is 93°C (200°F) or higher.
Within 15 minutes after the thermal shock, the instrument accuracy will be 1% of reading ± 1°, steady state conditions. Without this special circuitry, the recovery time would be one hour, with immediate accuracy of ± 10% to 20% of reading.
The most accurate way to measure the target temperature immediately after a thermal shock [or during the instrument stabilization time (15 minutes after the thermal shock)] is to pull the trigger and release it when the first number is displayed, immediately after "CCCC". If the trigger is held longer, the displayed temperature will drift and be corrected at automatic recalibration (approximately every 20 seconds).
A chevron (1) will be displayed in the upper center of the display window when the instrument has been exposed to a thermal shock greater than 15°C (27°F). The chevron will be displayed as long as the temperature differential of the instrument and the ambient temperature are more than 15°C (27°F). If very accurate readings are required, wait 15 minutes to take the readings. This may be important for an average reading over a 10 to 15 second time period. Generally for single temperature readings, the compensating circuitry will cause the reading to be acceptable.
Preparing The Infrared Thermometer For Use
1. Move slide switch (1) forward to the ON position. If the switch was already in the ON position with the display indicating a number, go to step 7.
2. The display should flash 1.00. If the display does not show numbers or "CCCC", the batteries are probably discharged; install new batteries as shown on page 4. If the display will not change, the electronics (microprocessor) is latched; refer to troubleshooting on page 16. The display will flash ten times and then automatically shut the microprocessor off [the arrows and decimal stay on]. Pull the trigger to reactivate.
3. Push emissivity down button (2), while the display is flashing, until the display begins counting down [for example, 1.00, .99, .98, .97, etc.].
4. Push SCALE SELECT button (3) several times to cycle the pointer from °F to °C to
etc.
5. Push DIFF TEMP SELECT button (4) several times to cycle the pointer from MAX-MIN to AVG.
6. Push DISPLAY SELECT button (5) to cycle the pointer through its range.
NOTE: If the instrument display does not respond when the various selector buttons are pushed, refer to the troubleshooting section on page 16.
7. Check the emissivity setting as follows:
a) Push SCALE SELECT button (3) to move pointer (6) to the
position as shown.
b) The number shown on the display is the emissivity setting. For general use, this number should be set at .95. For special applications, refer to SETTING EMISSIVITY on page 11.
c) Increase the emissivity setting by pushing button (7). Decrease the setting by pushing button (2).
d) Push SCALE SELECT button (3) to move pointer (6) to either the °F or °C position.
8. Check the position of DIFF TEMP SELECT pointer (8). Move the pointer to the MAX-MIN position or to the AVG position as desired by pushing button (4).
9. Check the position of DISPLAY SELECT pointer (9). Push DISPLAY SELECT button (5) to move the pointer to the TEMP position as shown. Other positions are MAXIMUM, MINIMUM, AVERAGE and DIFFERENCE.
Emissivity
Emissivity is the percentage of energy emitted from a surface in relation to a blackbody [where
= 1.00]. A blackbody is a perfect radiation source and emits the maximum possible thermal energy at a given temperature. The emissivity of most organic substances (wood, cloth, plastics, most paints) is approximately 0.95. Metals with smooth polished surfaces can have emissivities much lower than 1.00.
In order to accurately read absolute temperatures, it is necessary to know the surface emissivity. The surface texture has more effect on emissivity than material [rusty iron has a higher emissivity than iron that has been recently machined]. When measuring surface temperatures under 200°C (390°F), a strip of masking tape on the surface can serve as a target to ensure an emissivity of 0.95. Most painted or rusted surfaces have an emissivity of 0.95; therefore the use of masking tape is usually not necessary.
Major difficulties with emissivity will only be a problem when surface texture differences are extreme, such as between a chromium surface and that of rusty iron. This is particularly true if the surface temperatures are over 200°C (390°F). For most applications on construction machinery and engines, an emissivity of 0.95 can be used.
When measuring the difference in temperature between two surfaces, an approximate setting of emissivity is acceptable if the surface textures are similar, large temperature differences [5°C (9°F) or more] are expected, and the surface temperatures are less than 200°C (390°F). Although the absolute temperature may not be precise, the actual difference in temperature between the two surfaces will be accurately indicated.
When surface temperatures are similar and a small difference in temperature is expected [less than 5°C (9°F)], the displayed temperature differences can be increased by setting the instrument emissivity to a low value (such as 0.20). This technique can be used to locate internal and external plugging of the radiator or other components where it is necessary to find areas that have very small temperature changes. This technique can also be used on the other displays; however, remember that the displayed number will be an amplified value. The actual temperature readings will NOT be correct.
The table below lists emissivities for common materials. Because surface finish can affect the values below, it is best to verify emissivity as shown by the procedure "SETTING EMISSIVITY - UNKNOWN EMISSIVITY" shown on page 11.
NOTE: The emissivities listed above will apply to most applications on construction machinery and engines. Since emissivity can vary with temperature, other applications may require very exact emissivity settings. See the following references:
- 1. Chemical Rubber Handbook, 38th Edition.
- 2. Handbook of Chemistry and Physics, Chemical Rubber Publishing Co., Cleveland, Ohio.
- 3. DMIC Report 177, Battelle Memorial Institute.
- 4. Thermal Radiation Properties Survey, Honeywell Research Center - 1960.
- 2. Handbook of Chemistry and Physics, Chemical Rubber Publishing Co., Cleveland, Ohio.
(A) Setting Emissivity - Known Emissivity
1. Press and release SCALE SELECT button (1) until indicator pointer is aligned with
2. Press emissivity up button (2) or down button (3) until the correct value is shown on the display.
NOTE: The memory of the instrument is cleared if the emissivity is changed. This is indicated by "CCCC" in the display when the scale is changed back to °F or °C.
(B) Setting Emissivity - Unknown Emissivity
If the material to be measured has an unknown emissivity but a known reference temperature [for example, a temperature controlled oven or thermocouple reading], use the following procedure to find emissivity.
1. Press and release SCALE SELECT button (1) until indicator pointer (2) is aligned with °F or °C.
2. Press the trigger and press the emissivity down button (3) or up button (4) until the temperature displayed is the same as the known temperature.
3. Release the trigger; press and release SCALE SELECT button (1) until the pointer is aligned with
Observe and make a note of the emissivity reading for future measurements of the same material.
Minimum Target Size
To measure a surface temperature, the infrared thermometer must be aimed at the target by aligning the dot in the sighting scope with the center of the target. The dot in the scope covers approximately 25% of the effective measuring area of the instrument. To ensure that temperature measurements will be independent of distance, the target must always be larger than this effective measuring area of the instrument.
Calibration of the instrument is based on the infrared detector absorbing 100% of the energy being emitted by the object or objects in the target zone [the target zone is described below]. When the object to be measured is larger than the area the instrument "sees", the indicated temperature can be very accurate. When the object to be measured is smaller than the area the instrument "sees", the indicated temperature will not be accurate because the detector will absorb infrared energy from around the object being measured as well as the object itself. The size of the total area being measured in relation to the size of the object being measured, and the difference in their respective temperatures, will determine the displayed value. This value is an integrated average for the total area.
The smallest target area that can be measured is one with a diameter of 13 mm (.5 inches) at a distance of 750 mm (30 inches). To find the minimum acceptable target area at greater distances, divide the distance by 60. For example, for a target 2000 mm (80 inches) away, the target diameter being measured is 2000 mm divided by 60 = 33.3 mm (80 inches divided by 60 = 1.3 inches).
Measurement Speed
The infrared thermometer takes extremely fast measurements in most situations. This is possible because of the very small mass (size) of the infrared detector. However, when measuring very hot objects [for example, above 750°C (1500°F)], and then immediately measuring an object near room temperature, the detector will take several minutes to cool down. When this occurs, the first measurement will be the most accurate, then the measured temperature will appear to increase as the trigger is held. To check for detector heating, aim the infrared thermometer at a cool object (such as the floor) and take several readings until the temperature display is stable. This may require up to five minutes, depending upon how warm the detector has become. When the display has stabilized, the detector has cooled sufficiently to provide accurate low temperature measurements.
Measuring An Absolute Surface Temperature
1. Make sure the emissivity setting is correct for the material being measured. A correct emissivity setting is necessary if an accurate temperature measurement is to be taken. If in doubt about the emissivity, see the topic "EMISSIVITY" on page 10. For low temperature measurements [under 200°C (390°F)], use a strip of masking tape on the surface as a target to ensure a surface emissivity of .95.
2. Push SCALE SELECT button (1) until indicator (2) is on the desired temperature scale (°C or °F).
3. Push DIFF TEMP SELECT button (3) to put indicator (4) in the MAX-MIN mode.
4. Hold the instrument at a comfortable distance from your eye. Use sight (5) to aim the infrared thermometer at the object to be measured. The red dot in the sight will cover approximately 25% of the effective target area.
5. Pull and hold trigger (6) for a minimum of three seconds. IMPORTANT: Each time the trigger is pulled, all of the temperatures in memory will be erased.
6. Release the trigger. It is not necessary to watch the display while measuring surface temperature, since all of the information has been stored in memory.
7. Push DISPLAY SELECT button (7) to read the maximum, minimum and average temperatures, and the difference between the maximum and minimum temperatures recorded during the time the trigger was pulled.
Measuring The Difference In Temperature Between Two Surfaces
NOTE: It is not necessary to have the exact emissivity setting in order to get accurate temperature differential readings between two surfaces. However, the temperature reading of each surface may not be precise.
1. Push SCALE SELECT button (1) until indicator (2) is on the desired temperature scale (°C or °F).
2. Push DISPLAY SELECT button (3) until indicator (4) is at the DIFF position.
3. Push DIFF TEMP SELECT button (5) to put indicator (6) at the AVG position.
4. Hold the infrared thermometer at a comfortable distance from your eye. Use sight (7) to aim the instrument at each object to be measured. The red dot in the sight will cover approximately 25% of the effective target area.
5. Pull and hold trigger (8) for a minimum of three seconds. Each time the trigger is pulled with the controls in the above positions, the instrument will erase all information in memory except the newest (previous) average in the AVG memory register. However, the display will not indicate "CCCC", but will show either zeroes or the last temperature from the previous measurement cycle.
6. Release the trigger. It is not necessary to watch the display while measuring the temperature differences between the two surfaces. All information will have been stored in memory.
7. After the second object has been measured, the instrument will indicate the average difference in temperature between the two surfaces.
Replacement Of The Protective Film
The clear plastic 6V7169 Film, that covers the end of the barrel, is used to prevent dust from accumulating on the optical system of the instrument. Occasionally, this film may become damaged and require replacement. Use the following procedure to change this film.
NOTE: This film must be in place to ensure proper calibration of the instrument.
1. Remove end ring (1) by pulling it off the end of the instrument; a slight twisting motion may be necessary.
2. Remove old plastic film (2). Put new film (3) in position over the end of the barrel.
3. Install end ring (1) on the end of the barrel. Make sure ring (1) is fully seated.
4. Use a knife to remove the excess amount of film around the barrel.
Application Information
A Sealed And Lubricated Track
When checking sealed and lubricated track, a high temperature on one or more bushings would indicate a loss of lubricant in that bushing. Bushing temperature must be checked immediately after the machine has been working. Do this by slowly moving the machine and measuring the temperature of each bushing as it comes off either the idler or the sprocket. Hold the trigger of the instrument on constantly until all bushings on one track have been measured. This will reduce measurement time to approximately two seconds per bushing. If the trigger is released, approximately three seconds per bushing will be required. The additional time needed is due to automatic calibration of the instrument each time the trigger is pulled.
B Hydraulic Systems
Pressure changes in hydraulic systems that are caused by restrictions or leakage will generate heat. The greater the pressure change and the higher the flow rate, the more heat generated; therefore, a higher surface temperature will be indicated where the leakage to a lower pressure area is occurring. Although the displayed temperature may not be the actual fluid temperature, any temperature differential in an area where there should be none would indicate a problem within the system.
NOTE: Special techniques must be used when measuring the temperature of chromium surfaced rods and cylinders. Because the sun or other hot objects can reflect off the chromium surface and cause reading errors, use masking tape on the target zone or otherwise shield the rod or cylinder from the hot object.
C Radiators
There are two methods for measuring the temperature drop across a radiator. For both methods, the instrument must be set as follows:
EMISSIVITY - Set at .95 [this is assuming the surfaces to be measured are painted or masking tape is put on target area].
SCALE SELECT - Set at °F or °C.
DISPLAY SELECT - Set at DIFF position.
DIFF SELECT - Set at AVG position.
In order for the temperature differential measurement to be valid, it is necessary for the temperature regulator to be fully open. Do this by working the machine until the coolant discharge temperature from the engine is as close to 95°C (200°F) as possible. If necessary, cover part of the radiator. Keep the engine loaded by using converter stall and/or the hydraulic system.
Method 1
With the engine loaded, measure the temperature of the inlet pipe as close to the radiator as possible. Release the trigger, and measure the temperature of the outlet pipe as close as possible to the radiator. It is not necessary to watch the display while taking these measurements. Keep the red dot in the sight on the center of the pipes for approximately five seconds each. All data will be collected and stored by the instrument.
After the outlet pipe temperature has been measured, the temperature drop across the radiator will be displayed. If the absolute temperature of the outlet pipe is needed, move DISPLAY SELECT indicator to the TEMP position. To get the absolute temperature of the inlet pipe, add the DIFF number to the TEMP number.
There are several variations of this method. The process can be reversed by measuring the temperature of the outlet pipe first. The only change in the results will be that the DIFF display will indicate a minus (-) sign. The last temperature, minimum temperature, maximum temperature and average temperature can be recorded after measuring the temperature of each pipe. The differential temperature is only valid after the second reading, because the first reading does not have a reference reading to calculate the differential.
Reading the maximum and minimum temperatures after each measurement is a good way of validating the measurement. If there is more than a one degree difference between the maximum and minimum readings, this indicates that the thermometer was moved off target part of the time the trigger was pulled, or the temperature of the fluid inside was changing. This would make the measurement invalid, and the measurement should be repeated. If the second measurement is invalid, both measurements must be repeated.
Method 2
The second method of measuring radiator temperature drop requires removal of the radiator guard. With the guard removed and the instrument set as initially described, bring the engine to 95°C (200°F). Aim the instrument at the radiator top tank and pull the trigger. Slowly sweep back and forth across the top tank for about ten seconds. Release the trigger and measure the temperature in the bottom tank in the same manner. Release the trigger and read the temperature differential. This is the temperature drop across the radiator. If the maximum and minimum temperatures are read as in Method 1, there may be several degrees difference. This is valid because there may indeed be several degrees difference in temperature between various parts of the top and bottom tanks.
To find parts of the radiator that are plugged, either internally or externally, sweep the instrument slowly over the radiator core, keeping the trigger pulled and watching the display. If there is an area that is cooler than the adjacent areas, and the trend is vertical (for vertical tube radiators), the radiator tubes are probably plugged at this location. Areas that have secondary coolers, on either side of the radiator, will generally be warmer than the rest of the radiator.
D Engines
When the water temperatur regulators are fully open, the temperature rise across an engine will be equal to the temperature drop across the radiator. This temperature rise across the engine also includes all of the auxiliary coolers which use engine jacket water. Temperature rise across an engine is measured in a similar manner as temperature drop across a radiator. Set up of the infrared thermometer and preparation of the engine are the same as initial preparations for measuring temperature drop across a radiator.
Measure the temperature of the outlet pipe near the temperature regulator housing. Release the trigger on the instrument, and then measure the temperature of the water pump discharge pipe. If the temperature differential is not the same as the radiator temperature differential, the water temperature regulators are either leaking, or are not fully open [engine temperature is less than 95°C (200°F)]. This can be verified by measuring the temperature differential across the water pump.
To measure the temperature differential across the water pump, first measure the water pump discharge temperature as close to the pump discharge as possible; then measure the pump inlet temperature near the radiator outlet. The temperature differential should be zero. Any temperature differential is caused by water bypassing the radiator.
E Others
Most components that are not functioning correctly will usually produce more or less heat (depending on the function) than components that are operating correctly. Generally, the temperature of the suspected component can be compared to other components on the same machine or other machines that are doing the same type of work. Components such as track rollers, idlers, final drives, brakes, etc. can be checked in this manner.
Troubleshooting The Infrared Therometer
A Battery Problems
1. If the display fades or there is no display when the trigger is pulled, this is an indication of a low battery, dead battery, or poor battery connections.
2. If the display becomes "locked" (will not change reading or functions), or shows multiple functions, or shows erratic numbers (for example, "0c15"), this is an indication of a battery voltage below that needed for correct operation of the microprocessor. Install new batteries.
This "locked" condition may also be the result of a malfunction in the microprocessor caused by noise or static electricity. This problem can be corrected using one of the following procedures:
a) Press EMISSIVITY up button and down button simultaneously. This should reset the microprocessor to a flashing "1.00".
b) Turn the instrument off using the master on-off slide switch. Pull the trigger switch and hold for approximately ten seconds. Release the trigger switch. Turn the instrument on using the master on-off slide switch; cycle the controls as shown in the procedure PREPARING THE INFRARED THERMOMETER FOR USE on page 8.
B Loose Connections
Because the infrared thermometer is an assembly of several interconnected circuit boards, it is possible that one or more of the connections has become loose. To determine if this is the problem, remove the screw from the bottom of the barrel/handle; remove the barrel. Carefully unplug the blue "ribbon" cable and slide the circuits boards out of the display end of the instrument. Check to see if all circuit boards and connecting cables are firmly seated. Put the circuit boards back into position in the instrument, and connect the blue plug to the circuit boards. Put the barrel in position and install retaining screw. Cycle the controls as shown in the procedure PREPARING THE INFRARED THERMOMETER FOR USE on page 8.
Calibration
Calibration of the infrared thermometer and alignment of the sighting system require a very accurate heat source with a known emissivity (a black body) and a precision positioning device. It is recommended that calibration and alignment be performed by Raytek Incorporated, or a qualified test laboratory. Calibration and alignment will be covered in the repair Special Instruction. See the topic "Warranty" on page 17 for the locations of the warranty and repair dealers for Raytek Incorporated.
Warranty
If the infrared thermometer is received from Caterpillar in a damaged or defective condition, a replacement thermometer should be ordered from Caterpillar.
Inside the U.S.A., send the claim for replacement instrument, along with the failed instrument to:
Caterpillar Service Claims RoomDock 26
8915 North Pioneer Road
Peoria, IL 61615
Outside the U.S.A., send the claim for the replacement instrument to the administering company. Hold the defective instrument until advised by the administering company whether to scrap or return.
If the instrument becomes defective after use but before the warranty period expires, return it to any of the following Raytek, Inc. warranty dealers.
U.S.A., CENTRAL AND SOUTH AMERICA
Raytek, Incorporated1201 Schaffer Road
Santa Cruz, CA 95060
Telephone: (408) 458-1110
(800) 227-8074
CANADA
Infrascan102-7080 River Road
Richmond, British Columbia
Canada V6X 1X5
Telephone (416) 273-8655
UNITED KINGDOM
Calex Instrumentation9A High Street
Leighton Buzzard
Bedfordshire LU7 7DN
England
Telephone: 44-525-373178
EUROPE
AMREichenfeldstrasse
8150 Holzkirchen
West Germany
Telephone: 49-8024-5019
SCANDANAVIA
Scandia Metric ABBox 1307
171 25 Solna,
Sweden
Telephone: 08-82-04-00
DENMARK
SC Metric A/SSkodsborgrej 305
2850 Narem
Denmark
Telephone: 02-80-42-00
JAPAN
Matsushita Elec. Trading Co., Ltd.3-2, Minamisemba, 4 Chrome
Minami-Ku, Osaka 542
Japan
Telephone: 06-282-5111
AUSTRALIA
Tubemakers Process Controls143-145 Paramatta Road
P.O. Box 381
Granville, NSW
Australia
Telephone: 02-609-6666
Raytek, Incorporated Warranty
The 6V6125 Infrared Thermometer is warranted in its entirety against any defects in material and workmanship which develop for any reason whatsoever, except abuse, within a period of one (1) year following the date of purchase of the instrument by the original purchaser. This warranty is extended by Raytek, Inc., only to the original purchaser or original user of the instrument.
In the event a defect develops during the warranty period, Raytek will, at Raytek's election, repair or replace the infrared thermometer with a new or reconditioned instrument with same specifications. In order to obtain service by Raytek under warranty, the original purchaser or original user must return the instrument, postage prepaid, to one of the warranty dealers shown on page 17.
In the event of replacement with a new or reconditioned model, the replacement instrument will continue the warranty period of the original infrared thermometer.
Any implied warranties arising out of the sales of the 6V6125 Infrared Thermometer, including but not limited to implied warranties of merchantability and fitness for a particular purpose, are limited in duration to the above stated one (1) year period. Raytek shall not be liable for loss of use of the infrared thermometer or other incidental or consequential damages, expenses, or economic loss or for any claim for such damages, expenses or economic loss.
U.S.A. Customers: Some states do not allow limitations on how long implied warranties last or the exclusion or limitations of incidental or consequential damage, so the above limitations or exclusions may not apply to you. This warranty gives you specific rights, and you may also have other rights which vary from state to state.
Service repairs and calibration out-of-warranty can be performed by any of the Raytek warranty dealers. Some of the independent Raytek dealers can also repair and calibrate the instrument. These independent dealers will be familiar with the basic instrument; however, there are several components that are used only in the Caterpillar arrangements of the infrared thermometer. These major components are available from the Caterpillar parts department and are listed on page 2.