Omega 871A, Руководство пользователя

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SECTION 1 INTRODUCTION
1.1 GENERAL DESCRIPTION
The OMEGA ® Model 871A and Model 872A Digital Thermometers are
ultrasensitive hand held instruments. Low power LSI devices combined
with a large 0.6" (15 mm) LCD, deliver reliability, extended battery life, and
an extremely readable readout. One nine volt battery will deliver 100 hours
of continuous operation.
The 871A and 872A are operationally identical except for minor differences
related to each model’s thermocouple input: Model 871A is designed for
use with type K (Chromel-Alumel) thermocouples; Model 872A is designed
for use with type J (Iron-Constantan) thermocouples.
Cold junction electronic circuitry in the Model 871A and Model 872A
automatically compensates for ambient temperature changes. A special
integrating A/D converter corrects for thermocouple non-linearity during
each digitization cycle. The resulting conformity to the standard
thermocouple voltage table is within 1ºC over the entire measurement span of
the instrument.
Although the 871A and 872A are ideal for temperature measurement in the
field, they also function well as bench instruments when equipped with the
optional tilt stand. The Model 871A and Model 872A provide dual inputs,
selectable scales (ºF/ºC), 1.0º and 0.1º resolution, and an analog output.
The versatile dual input configuration permits two point temperature
measurement such as those required in process monitoring. The analog
output allows interfacing with chart recorders or data acquisition system’s
functioning as an electronic ice-point reference.
1.2 FEATURES
• Wide temperature range • Dual thermocouple inputs
• Selectable scales (ºF/ºC) • Analog output
• 0.1º and 1.0º resolution • Heavy duty construction
• 0.25% accuracy
1.2.1 ACCESSORY ITEMS
SC-GG-[*]-30-36-SMP-M Thermocouple sensor (supplied with
unit) if purchased separately.
KS-871 Tilt stand
SC-800 Soft carrying case
880-A2 Deluxe carrying case
U9VL 9 V lithium battery
SMP-[*]-M Subminiature thermocouple connector, male
SMP-[*]-F Subminiature thermocouple connector,
female
OS-201-1 2 oz. jar of high thermal conductivity paste
for fast surface measurements
*Insert thermocouple type: J for Model 872, K for Model 871
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