Probe Replacement - Fluke 80T-150 Instruction Manual

80T-150
a. Access the interior of the temperature-to-voltage NOTE
converter.
If the unit is calibrated on the? Е scale, inter-
action will occur between adjustments R2
and R4. Repeat steps d, e, f and g until read-
ings are obtainable without adjustment.
b. Determine the selected temperature (°C or °F).
See marking on bottom cover decal.
c. Connect the 80T-150 to a DVM and select the Table 2. Test Equipment Requirements
100 mV ас range (10 uV resolution). Instrument Minimum Use Recommended
Type Specifications Model
а. Turn the 80T-150 power switch to ON and immerse Mercury 0.1°C i Princo Model
the probe tip =2 inches into a thermometer moni- Thermometer Resolution SAMA-CP45
tored 0°C bath. Allow the DVM reading to stabil- Dewar Flask 1-pint capacity Thermos
ize (2230 seconds). and Cap (for ¡ce bath) Bottle
Metal or 1-pint capacity Suitable for
y e 4 я Glass Container boiling water
e. Adjust R2 (see Figure 6.) to obtain the appropriate S
DVM reading: Digital Volt 100 mV range Fluke Model
У Meter with 10 uV 8600A
°C 0.00#0.05 mV de [0+2 mV dc]
2E 320501 мас [32:04 то М de]
If necessary, additional cw range can be added to
R2 by adding a solder bridge across E8 and E9 as
shown in Figure 5.
Resolution
1000 mV range
with 100 uV
Resolution
PROBE REPLACEMENT
f. Immerse the probe tip approximately 2 inches into
a 70 to 100°C bath and allow the DVM reading to A probe kit (80T-150-7001k) is available for replacing
stabilize. Change DVM range, if necessary, for damaged or defective probes. The kit includes a probe
°F calibration. and cable assembly, four metal film resistors (R3), and
an installation and calibration instruction sheet.
р. Adjust R4 to obtain а DVM reading which agrees LIST OF REPLACEABLE PARTS
with the bath temperature (BT) as monitored by a
mercury thermometer. Component location drawings and a list of replaceable
ЗОЎ BA<E0.05 mV дет, [BTÆ2 mMmVide] parts are shown in Figure 6. When ordering parts, рго-
Cy BTEO mV de® ВУСА ОУ de] vide description, Fluke ра and quantity required.