Digital Thermometer
Parr Instrument Company
4
Thermistor Probe Installation
Plug the connector end of the 1168E2 thermistor probe into the 1856E connector on the back panel
(see Figure 1).
Figure 1
6775 Digital Thermometer Back Panel
Note: 2 – 1936E Lithium 3.6V batteries are used in the 6775/6775A Digital Thermometer.
Overview
Parr’s digital thermometer provides digital preci-
sion and reliability for temperature measurements
in a laboratory environment. The working tempera-
ture range of the thermometer is 10 to 40 °C with
a resolution of 0.001 °C. The thermometer uses the
30-cm long Parr 1168E2 Thermistor Probe, incorpo-
rating a durable 3.18 mm (0.125”) diameter stainless
steel sheath. This measurement system is optimized
for calorimetric temperature measurements and is
especially designed to be used with the Parr 1341
Plain Jacket Calorimeter. The digital thermometer is
offered as a replacement for the Parr 1604 [19-35 °C]
and 1623 [24-30 °C] Liquid-in-Glass Thermometers.
However, the thermometer is equally well suited
for other types of temperature measurement tasks
in the 10 to 40 °C range where high precision mea-
surements are required. The thermometer is bat-
tery powered using high capacity lithium batteries,
providing approximately 200 hours of operation. It
comes equipped with an easy to read two-line, 16
characters per line, liquid crystal display. In addition
to displaying temperature, the thermometer pro-
vides a free-running timer that can be used to time
stamp temperature measurements or to aid the user
in recording temperatures at regular time intervals.
The 6775A Digital Thermometer incorporates all of
the aforementioned features and offers the follow-
ing additional capabilities.
The 6775A thermometer provides for operation with
a second temperature probe. This second probe can
be used to monitor the temperature of a second
calorimeter or the calorimeter jacket temperature.
Acquiring both the calorimeter and jacket tempera-
tures can be used to facilitate rigorous calorimeter
heat leak correction calculations during long dura-
tion tests.
The 6775A thermometer comes equipped with a
serial RS-232C interface. This interface is used to
confi gure the thermometer for advanced operation
such as two channel operation. The interface capa-
bility is also used to permit logging temperatures
at a user specifi ed time interval. The user interacts
with the thermometer through a simple command
line interface using any terminal emulation program
installed on a host PC.
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