www.ametekusg.com
User Manual
Model DT-8300EX
DESCRIPTION
AMETEK Model DT-8300EX battery operated digital temperature indicator is a compact, rugged and reliable indicating
instrument which is self-contained and specifically designed for accurate temperature measurement applications,
in areas without power availability. It is an ideal single unit substitute to conventional analog indicators because
of its inherent accuracy in process measurement and other superior characteristics such as extremely low power
consumption, immunity to shocks, dust, ambient temperatures, humidity and corrosive atmospheres. Its main
advantage is its minimal power operation providing several months of uninterrupted indication of the measured
temperature.
AMETEK Model DT-8300EX is manufactured using selected high-grade components which guarantee reliability and
long operation. It has no moving parts, which greatly enhances its versatility and carries a one (1) year performance
guarantee against manufacturing and workmanship defects.
The unit is designed for use in process industries where vibration, inclement weather and corrosive environments prevail.
The electronics are enclosed in low copper epoxy coated Aluminum housing; and for more aggressive environments,
316 Stainless Steel housing is optionally available (please contact customer service for more information). Both
housings meet the requirements of NEMA 4X. The NEMA 4X rating provides total immunity to corrosive atmospheres,
high humidity (including condensation) and dust.
The instrument is micro-controller based and operates on battery power, having provision for two Type AA batteries in
series configuration. It is specifically designed to operate on minimal power consumption and provides temperature
readings for extensive period on battery power alone. While the micro-controller is continuously sampling the input
signal, it refreshes the display at approximately ten-second intervals with the updated internal readings.
The indicator accepts any of the following Temperature Sensors as direct input :
The instrument displays the actual temperature value calibrated in the desired units, on a linear scale on a 4-Digit
seven-segment LCD digital display module.
A Power-On switch is provided to switch off the instrument when not in use, thereby saving battery life. Further, the
temperature reading is available in both, degree Celsius and Fahrenheit units. A switch is provided for selecting the
desired unit.
The principal of operation is briefly as follows:
• The input signal from the selected temperature sensor is passed through a series of amplification and conditioning
stages.
• Initially, the signal is conditioned internally and fed to a signal converter and amplifier circuit.
• Then, the transduced signal output is fed into an A/D converter before being finally passed through a Decoder/
Driver digitizing circuit which displays the input signal in the form of decimal digits on a seven-segment display
module.
Sensor
Number
Temperature Sensor
Calibrated Range
°C
°F
1
RTD Pt-100 (three-wire)
–100.0 to 500.0
– 148.0 to 932.0
2
Thermocouple Type J
–50 to 750
–58 to 1382
3
Thermocouple Type K
–50 to 1000
–58 to 1832
