DIGITAL THERMOCOUPLE
THERMOMETERS
USER’S MANUAL
Please read this manual carefully and thoroughly before using this product.
DT8852
Dual input; compatible with
types “K”, “J” and “T” thermocouples
DT8855
Single input; compatible with
types “K”, “J”, “T”, “R”, “S” and “E” thermocouples
DT8856
Dual input; compatible with
types “K”, “J”, “T”, “R”, “S” and “E” thermocouples
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Toll Free 1-800-517-8431
TABLE OF CONTENTS
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Key Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 –3
What’s in the Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 –5
Setup Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 –7
Select Thermocouple Type . . . . . . . . . . . . . . . . . . . 6
Install Thermocouple(s) . . . . . . . . . . . . . . . . . . 6 –7
Operating Instructions. . . . . . . . . . . . . . . . . . . . . . . . 7 – 10
Monitoring Temperatures in Real Time. . . . . . . 7 –8
Making Relative Measurements. . . . . . . . . . . . . . . 8
Recording Min/Max Temperatures . . . . . . . . . . 8 –9
PC-assisted Data Logging . . . . . . . . . . . . . . . 9 – 10
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operating & Maintenance Tips . . . . . . . . . . . . . . . . . . . . 11
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Return for Repair Policy . . . . . . . . . . . . . . . . . . . . . . . . . 12
Manuel de L'Utilisateur. . . . . . . . . . . . . . . . . . . . . . 13 – 24
Manual del Usuario . . . . . . . . . . . . . . . . . . . . . . . . . 25 – 36
INTRODUCTION
Thank you for purchasing General Tools & Instruments’ DT8852,
DT8855 or DT8856 Digital Thermocouple Thermometer. Please read
this user’s manual carefully and thoroughly before using the
instrument.
All three models are designed for precision temperature measurement.
They are also available for purchase with a National Institute of
Standards and Technology (NIST)-traceable calibration certificate.
KEY FEATURES
• Min/Max memory with relative time stamp
• Data hold
• Large backlit LCD with dual temperature readouts and relative
time stamp readout
2
• Calculates and displays T1-T2 (DT8852 and DT8856 only)
• °C/°F and data hold buttons
• RS-232 output jack; optional PC data logging kit includes RS-232
to USB adapter
• 20-minute Auto Power Off (can be disabled for data logging)
• 1 year limited warranty
WHAT’S IN THE CASE
All three models come in a custom hard carrying case with a “9V”
battery and this user’s manual. The DT8852 and DT8856 each come
with two general-purpose “K” type bead thermocouple probes with a
measurement range of -58° to 392°F (-50° to 200°C). The DT8855
comes with one “K” type probe with the same range.
A variety of other “K” type thermocouple probes with different sensor
types, form factors and temperature ranges are available from
General. Visit www.generaltools.com and enter “K type probe” in the
SEARCH box. The following optional accessories are also available for
the DT8852, DT8855 and DT8856: ASFTKIT (PC Data Logging Kit) and
Z110VADPT (9V AC/DC adapter)
PRODUCT OVERVIEW
Figure 1 on p. 4 shows all of the controls, indicators and physical
features of the DT8852 and DT8856. The descriptions of Callouts A
and I detail the two differences between those dual-input models and
the single-input DT8855. Figure 2 on p. 5 shows all possible
indications on the LCD. Familiarize yourself with the positions and
functions of all controls, indicators and physical features before
moving on to the Setup Instructions and Operating Instructions.
A. Two spade-lug thermocouple probes plugged into T1 (left) and T2
(right) jacks (DT8852 and DT8856 only; DT8855 has only one (T1)
jack on left)
B. LCD
C.
RS232
jack (on side)
REC
D.
button:
•
Pressed briefly with unit in real-time mode
Record mode.
, begins operation in
3
•
Pressed once briefly in Record mode
, switches primary
temperature display to show maximum temperature recorded
since entering Record mode.
Pressed twice briefly in Record
•
mode
,
switches primary display to
Fig. 1
show minimum temperature recorded
since entering Record mode.
•
Pressed a third time briefly in Record
mode
, resumes showing real-time
temperature sensed by T1 input on
primary display without exiting
Record mode.
Pressed and held with unit in Record
•
, exits operation in Record mode
mode
K
and resumes operation in real-time
mode.
• Also used with ,
REC
and
buttons to select thermocouple type.
DC9V
°C/°F
jack (on side)
button:
E.
F.
°C/°F
J
I
• Toggles between Celsius and Fahrenheit temperature units.
• Also used to select thermocouple type.
G. button. Pressed briefly, turns LCD backlight on for 30 seconds.
H. Battery compartment cover (opens from back)
CHANNEL
I.
• Pressing
button (DT8852 and DT8856):
CHANNEL
button once switches primary display to show
value of T2 input and secondary display to show value of T1 input.
•
Pressing button again
switches primary display to show
difference between T1 and T2 inputs (T1-T2) and causes
secondary display to toggle between T1 and T2 readings.
•
Pressing button again
resumes normal display (T1 on primary
display and T2 on secondary display).
TIMER
button (DT8855). Pressed briefly, starts relative time clock for
use as measurement reference.
REL/HOLD
J.
•
Pressed briefly
button:
, “freezes” primary temperature readout with T1
reading while allowing secondary readout to continue updating
with real-time T2 value.
4
A
B
C
D
E
F
G
H
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