Section 1 Introduction; General Description; Features; Accessory Items - Omega 871A User Manual

SECTION 1
1.1

GENERAL DESCRIPTION

The OMEGA
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
• Selectable scales (ºF/ºC)
• 0.1º and 1.0º resolution
• 0.25% accuracy
1.2.1

ACCESSORY ITEMS

SC-GG-[*]-30-36-SMP-M
KS-871
SC-800
880-A2
U9VL
SMP-[*]-M
SMP-[*]-F
OS-201-1
*Insert thermocouple type: J for Model 872, K for Model 871
INTRODUCTION
® Model 871A and Model 872A Digital Thermometers are
• Dual thermocouple inputs
• Analog output
• Heavy duty construction
Thermocouple sensor (supplied with
unit) if purchased separately.
Tilt stand
Soft carrying case
Deluxe carrying case
9 V lithium battery
Subminiature thermocouple connector, male
Subminiature thermocouple connector,
female
2 oz. jar of high thermal conductivity paste
for fast surface measurements
1