Digital Thermometer
www.parrinst.com
3
Preface
Scope
This manual contains instructions for installing and
operating the Parr 6775 Digital Thermometer with
the 1341 Plain Jacket Calorimeter. For ease of use,
the manual is divided into 8 chapters.
Overview
Operation
Maintenance
Troubleshooting
Appendix 1
Parts Lists
Drawings
Technical Service
Subsections of these chapters are identifi ed in the
Table of Contents.
To assure successful installation and operation, the
user must study all instructions carefully before
starting to use the Digital Thermometer to obtain an
understanding of the capabilities of the equipment
and the safety precautions to be observed in the
operation.
Explanation of Symbols
I On Position
O Off Position
Safety Information
To avoid electrical shock, always:
1. Disconnect the batteries before maintenance or
servicing.
To avoid personal injury:
1. Do not use in the presence of fl ammable or com-
bustible materials; fi re or explosion may result.
This device contains components which may
ignite such material.
2. Refer servicing to qualifi ed personnel.
Intended Usage
If the instrument is used in a manner not specifi ed
by Parr Instrument Company, the protection
provided by the equipment may be impaired.
General Specifi cations
Electrical Ratings
7.2 VDC, 14.5 mA
Environmental Conditions
This apparatus is to be used indoors,
Operating: 10 ºC to 30 ºC; maximum relative
humidity of 80% non-condensing.
Installation Category II (over voltage)
in accordance with IEC 664.
Pollution degree 2 in accordance with
IEC 664.
Altitude
Limit:
2,000 meters.
Storage: -25 ºC to 65 ºC; 10% to 85% relative
humidity.
Electromagnetic Compatibility
Immunity: In accordance with EN 61326-1:2005,
controlled EM environment.
Emission: In accordance with EN61326-1:2005,
class A equipment.
Provisions for Lifting and Carrying
Before moving the instrument, disconnect all con-
nections from the rear of the apparatus. Lift the
instrument by grabbing underneath each corner.
Periodic cleaning may be performed on the exterior
surfaces of the instrument with a lightly dampened
cloth containing mild soap solution. All power
should be disconnected when cleaning the instru-
ment. There are no user serviceable parts inside the
product other than what is specifi cally called out
and discussed in this manual. Advanced trouble-
shooting instructions beyond the scope of this
manual can be obtained by calling Parr Instrument
Company in order to determine which part(s) may
be replaced or serviced.
Specifi cations
Probe type Thermistor
Thermometer range 10-40 °C
Resolution 0.001 °C
Sampling Time 1 second
Absolute Accuracy: The thermometer accuracy is
limited by the probe interchangeability which is 0.1 °C
Differential Accuracy: Better than 0.02 °C over any
15 °C span
Repeatability: Better than 0.001 °C
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