Tegam 865 Manuel utilisateur
January 2018
Rev G
TABLE OF CONTENTS
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Manual Addenda . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Preparation For Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Safety Symbols and Terms . . . . . . . . . . . . . . . . . . . . . . . . . . 5
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SERVICING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Verification Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Special Handling of Static Sensitive Devices . . . . . . . . . . . . . 10
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . 10
Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Battery Installation/Replacement . . . . . . . . . . . . . . . . . . . . . . 14
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
1
© Copyright 1999 TEGAM, Inc.
SPECIFICATIONS
MODEL 865 SPECIFICATIONS
TEMPERATURE SENSOR TYPE: Thermistor (2252 Ohm @ 77°F)
*ACCURACY: Includes repeatability, temperature coefficient (65° to 82°F), time sta-
bility (1 year), and linearization conformity errors. Excludes probe errors; however
probe errors around 32°F may be compensated by an internal adjustment.
REPEATABILITY: 0.2°F typical for 1 week at constant ambient temperature.
TEMPERATURE COEFFICIENT: 65° to 82°F; included in accuracy specification.
From 14° to 65° and 82° to 122°F; less than ±(0.06% rdg + 0.01°F)/°F.
SENSOR VOLTAGE: 40mV rms maximum.
MODEL 866 SPECIFICATIONS
TEMPERATURE SENSOR TYPE: Thermistor (2252 Ohm @ 25°C)
*ACCURACY: Includes repeatability, temperature coefficient (18° to 28°C), time sta-
bility (1 year), and linearization conformity errors. Excludes probe errors; however
probe errors around 0°C may be compensated by an internal adjustment.
REPEATABILITY: 0.1°C typical for 1 week at constant ambient temperature.
TEMPERATURE COEFFICIENT: 18° to 28°C; included in accuracy specification.
From –10° to 18° and 28° to 50°C; less than ±(0.06% rdg + 0.01°C)/°C.
SENSOR VOLTAGE: 40mV rms maximum.
MODEL 865 and 866 GENERAL SPECIFICATIONS (unless specified):
DISPLAY: 3-1/2-digit LCD, 13mm (0.5") height. Polarity and decimal point indication.
CONVERSION RATE: 1.5 readings per second.
OPEN SENSOR INDICATION: Display reads between –100° and –199°.
OVERRANGE INDICATION: 3 least significant digits blanked.
2
TEMPERATURE ACCURACY*
RANGE SPAN RESOLUTION (65° to 82°F; 1 year)
200°F –40.0° to 199.9° 0.1° ±(0.3% rdg + 0.5°F)
–70.0° to –40.1° 0.1° ±(0.3% rdg + 1.0°F)
300°F –70° to 300° 1° ±(0.3% rdg + 1°F)
TEMPERATURE ACCURACY*
RANGE SPAN RESOLUTION (18° to 28°C; 1 year)
150°C–40.0° to 150.0° 0.1° ±(0.3% rdg + 0.3°C)
–55.0° to –40.1° 0.1° ±(0.3% rdg + 0.6°C)
3
MAXIMUM COMMON MODE VOLTAGE: 42V peak to earth.
COMMON MODE REJECTION: Less than 0.01°/volt at DC, 50Hz and 60Hz. (2kΩ
unbalance, LO driven).
ENVIRONMENTAL LIMITS FOR OPERATING: –10° to 50°C, (14° to 122°F) less than
80% relative humidity up to 35°C (95°F); linearly derate 3% R.H./°C from 35° to 50°C
(1.5% R.H./°F from 95° to 122°F).
ENVIRONMENTAL LIMITS FOR STORAGE: –35° to 60°C(–30° to 140°F), less than
90% relative humidity up to 35°C (95°F); linearly derate 3% R.H./°C from 35° to 60°C
(1.5% R.H./°F from 95° to 140°F).
THERMISTOR LINEARIZATION: Ratiometric dual-slope A/D with continuous lin-
earization.
INPUT CONNECTION: 1/4" (6mm) Phone Jack.
POWER: 9V alkaline or carbon-zinc (NEDA 1604) battery.
BATTERY LIFE, CONTINUOUS: 350 hours typical with alkaline battery; 200 hours
typical with carbon-zinc battery.
BATTERY INDICATOR: Display indicates “LO BAT” when less than 10% of life
remains.
DIMENSIONS, WEIGHT: 160mm long x 69mm wide x 31mm thick (6.3" x 2.7" x 1.2").
Net weight 210gm (7.5 oz.).
CONSTRUCTION: Heavy duty ABS plastic housing.
ACCESSORIES SUPPLIED: Battery and instruction manual.
Specifications subject to change without notice.
4
GENERAL INFORMATION
The Models 865 and 866 are handheld digital thermometers. Both instru-
ments have large, easy to read, liquid crystal displays (LCD). The input con-
nection for each instrument consists of a 1/4 inch phone jack. This input
accommodates any one of the available accessory thermistor based probes
and sensors. The resistance value of the thermistor at 25° C (77° F) is 2252Ω.
The instruments are powered by a 9V battery. Continuous operation of 350
hours is typical with an alkaline battery or 200 hours typical with a carbon-
zinc battery.
The Model 865 measures temperatures from –70°F to 300°F on two ranges.
The 300°F range measures temperature from –70°F to 300°F with a resolu-
tion of 1°F. The accuracy of the 300°F range is ±(0.3% + 1°F). The 200° F
range measures temperature from –70°F to 199.9°F with a resolution of
0.1°F. The accuracy from –70°F to –40°F is ±(0.3% + 1°F) and the accuracy
from –40.0°F to 199.9°F is ±(0.3% + 0.5°F).
The Model 866 measures temperature from –55° to 150°C on one range with
a resolution of 0.1°C. The accuracy from –55° to –40.1°C is ± (0.3% + 0.6°C).
The accuracy from –40.0°C to 150.0°C is ± (0.3% + 0.3°C).
MANUAL ADDENDA
Improvements or changes to this manual will be explained on an addendum
included with the instrument.
UNPACKING AND INSPECTION
The Models 865 and 866 are inspected both mechanically and electrically by
TEGAM before shipment. Upon receiving the instrument, unpack all items
from the shipping container and check for any obvious damage that may
have occurred during transit. Report any damage to the shipping agent.
Retain and use the original packing materials if reshipment is necessary. The
following items are shipped with all Model 865 and 866 orders:
• Instrument (865 or 866)
• Battery (NEDA 1604)
• Instruction Manual
5
OPTIONAL ACCESSORIES
Model 8660 Tilt Stand/Belt Clip/Probe Holder for the Model 865 or 866.
Model 8662 Encapsulated Thermistor for general purpose temperature
measurements. Accuracy of ± .2°C from 0°C to 70°C. Response time is 6
seconds in stirred liquids. The temperature range is –55°C to 150°C. The
probe length is a 6 foot teflon cable.
Model 8663 General Purpose Immersion Probe for temperature measure-
ments of liquids and general purpose applications. The accuracy is ± .2°C
from 0°C to 70°C. The temperature range is from –55°C to 150°C. The
response time is 3 seconds in stirred liquids.
Model 8665 Surface Probe for temperature measurements of flat surfaces
of solids. The temperature range is –55°C to 150°C. The accuracy is ± .2°C
from 0°C to 70°C. The response time is 5 seconds (brass block).
Model 8666 Air/Gas Probe – Exposed thermistor within a protective shroud
responds to ambient temperature. The temperature range is –55°C to 150°C.
The accuracy is ± .2°C from 0°C to 70°C. The response time is 5 seconds
(5m/sec airflow).
Model 8668 Soft Carrying Case is a padded vinyl carrying case that holds
one handheld meter, a Model 8660 and a probe.
PREPARATION FOR USE
The Models 865 and 866 are supplied ready for use. To replace/install the
battery, refer to the servicing information section. The thermometer is
designed to work with any of the probes listed in the optional accessories
section.
SAFETY SYMBOLS AND TERMS
The symbol on the instrument denotes that the user should refer to the
operating instructions.
The WARNING used in this manual explains dangers that could result in per-
sonal injury or death.
The CAUTION used in this manual explains hazards that could damage the
instrument.
▲▲
!
OPERATION
Refer to Figures 1 and 2 for Models 865 and 866 control layouts.
ENVIRONMENTAL CONDITIONS
Operation of the Model 865 and 866 should take place at an ambient tem-
perature which is stated in the specifications.
865 Operation
1. Turn power on by selecting the desired range.
A. 200°F range is the center position of the ON/OFF range switch.
B. 300°F range is the upper position of the ON/OFF range switch.
2. Select appropriate temperature probe and insert it into the input jack.
(Model 8662, 8663, 8665 or 8666.)
3. Make the measurement:
A. Touch the probe tip to the material to be measured.
B. Read the display. Reading is in degrees Fahrenheit.
6Figure 1. Model 865 Control Layout
NOTE
An open sensor is indicated by a reading on the display of
between –100° and –199°.
WARNING
A shock hazard exists on the Model 865 input jack when
probes or sensors are exposed to voltage levels greater than
42 volts peak to earth ground.
CAUTION
Do not attempt to measure temperatures beyond the range of
the probe being used. Probe damage may occur. Maximum
probe temperatures are given in the optional accessories
section.
Safety Precautions:
1. Do not touch the probe tip when measuring excessively high or low tem-
peratures.
2. Do not exceed 42 volts peak from the input jack to earth ground.
866 Operation
1. Set power on. The ON/OFF range switch is located on the side of the
instrument. Turning power on also selects the 150°C measurement
range.
2. Select appropriate temperature probe and insert it into the input jack.
3. Make the measurement:
A. Touch the probe tip to the material to be measured.
B. Read the display. Reading is in degrees Celsius.
NOTE
An open sensor is indicated by a reading on the display of
between –100.0° and –199.9°.
WARNING
A shock hazard exists on the Model 866 input jack when
probes or sensors are exposed to voltage levels greater than
42 volts peak to earth ground.
7
CAUTION
Do not attempt to measure temperatures beyond the range of
the probe being used. Probe damage may occur. Maximum
probe temperatures are given in the optional accessories
section.
Safety Precautions:
1. Do not touch the probe tip when measuring excessively high or low tem-
peratures.
2. Do not exceed 42 volts peak from the input jack to earth ground.
8
Figure 2. Model 866 Control Layout
SERVICING INFORMATION
VERIFICATION PROCEDURE
Functionality Check
At room temperature hold the tip of a probe sensor between your thumb and
index finger. A reading ascending to between 25°C and 40°C should be real-
ized for the Model 866 and a reading of 77°F to 104°F should be realized for
the Model 865 to confirm the functionality of the instrument.
Accuracy Check
1. Set up the circuit shown in Figure 3. See Table 3 for recommended test
equipment.
2. Follow Table 1 to verify the instrument’s performance.
NOTE
The LO of the resistance box must be connected to the LO
(sleeve) of the 1/4" phone jack. The HI of the resistance box must
be connected to the HI (tip) of the 1/4" phone jack.
Table 1. Performance Verification
9
Model 865
Step Setting Decade Resistance Allowable Reading
1 200°F 75,750 ohms –39.4 to –40.6
2 200°F 245,700 ohms –68.8 to –71.2
3 200°F 19,220 ohms –00.5 to 00.5
4 200°F 220.8 ohms 188.9 to 191.1
5 300°F 43 ohms 298 to 302
Model 866
Step Setting Decade Resistance Allowable Reading
1 150°C 75,790 ohms –39.6 to –40.4
2 150°C 217,100 ohms –54.2 to –55.8
3 150°C 7,355 ohms –00.3 to 00.3
4 150°C 152.8 ohms 99.4 to 100.6
5 150°C 41.9 ohms 149.2 to 150.7
Ce manuel convient aux modèles suivants
1
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