Ametek DTI-1000, STS-100 Specifications

t e m p e r a t u r e

Wide temperature range

DTI-1000: -200 to 750°C (-328 to 1382°F)
STS-100: -150 to 650°C (-238 to 1202°F)

Improve your accuracy

DTI-1000: accuracy to ±0.005°C (±0.009°F)
DTI-1000 + STS probe:
±0.03°C (±0.054°F) ± LSD

Reliable temperature readings

The measuring principle is a 4-wire True
Ohm Measurement, which eliminates the
EMF in cables, sockets, and sensors

Reference Digital Temperature
Indicator

DTI-1000 and STS-100

Dual channel inputs

Sensor 1 and sensor 2, with differential
value 1 - 2, peak hold etc.

Minimize paperwork

RS232 communication, special calibration
and data storage software are included

Fast response time

Ensures correct monitoring of the tempera­ture stability

Specified low drift

Maintains a minimum uncertainty budget
over the entire period between re-calibra­tion intervals

Wide selection of probes

Including 90° angled or cable probe, and
4 mm / 0.16 in or 6.35 mm / 0.25 in, offer­ing flexibility in test methods and sensors­under-test

Wherever there is a demand for reliable and accurate temperature mea­surement, you can rely on the JOFRA DTI-1000 reference thermometer
and the JOFRA STS reference probes; backed on more than 50 years of
experience.

The DTI-1000 with a STS-probe is a fully traceable thermometer recom­mended as the reference instrument to verify the true temperature in any
type of temperature calibrator, liquid bath, or dry-block calibrator.

Use the DTI-1000 and the STS probes as your working temperature
reference in any calibration application or use the set-up directly in cus­tody transfer applications where high accuracy (low uncertainty) means
money.

The superior specifications combined with a long history of reliability and
low drift have made the DTI-1000 and the STS probes the working stan­dard in many national laboratories worldwide.

The STS industrial temperature reference probes are built to last. All
Superior Temperature Standard probes are economical and offer fast
response times, low immersion depths, compact physical sizes, and
specified low drift rates; even at high temperatures.

ISO 9001 Manufacturer

Specification Sheet, SS-DTI-1000

The ON/OFF key automatically initiates a self-test
routine and the display indicates tested param­eter results plus the date of the last calibration.

Sensor 1 connections

Sensor 2 connections

The MENU/ENTER key includes intelligent
prompts that guide the user through setup
and operation. This key allows the user to
specify measuring units, resolution, sensor
identification, and coefficients.

The RESET/SELECT key allows
the user to enter peakholds and
to change settings in the MENU
mode.

Display with 2 * 20 characters,
which continuously read out
the two inputs.

The MODE key allows the user
to specify temperature modes on
the dual channel inputs; sensor
1 and sensor 2, with differential
values 1-2, peak hold etc.

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Carrying case (Optional) - 124944

The optional protective carrying case ensures safe
transportation and storage of the instrument and
associated equipment.

Digital Temperature Indicator • DTI-1000 & STS-100

True Ohm Measurement

The DTI-1000 has been designed to employ state-of-the­art DC measuring techniques in combination with powerful
microprocessor technology. To achieve high accuracy, the
measuring principle used by the DTI-1000 is True Ohm
Measurement thus eliminating the EMF from cables, sock­ets, and sensors.

Conversion to temperature

DTI-1000 will accept Callendar van Dusen coefficients R0,
A, B and C or ITS-90 coefficients for converting resistance
to temperature. If you do not have these coefficients avail­able from the certificate for the sensor, but have measure­ment data (temperature and resistance), JOFRACAL can
help you calculate the coefficients required.

True Ohm Measurement is a proven method to achieve
accurate compensation for errors induced by thermal
effects.

The resistance is measured through the 4-wire system at
1 mA, after which the instrument takes a reading with­out any applied current; this second reading is the “error
EMF”.

Combining a DTI-1000 and a STS reference sensor with
the use of ITS-90 coefficients ensures the best overall
accuracy.

Simplified operation

The DTI-1000 features an easy-to-read VFD display and
dedicated function keys. All operations are performed
from the instrument’s front panel.

Reference resistors

To minimize the effect of any drift caused by ambient
temperature, humidity and /or aging, the DTI series is
designed with built-in high precision and extremely stable
reference resistors. This technique minimizes drift.

Linearity

To obtain high accuracy, it is necessary to know the char­acteristics of the Pt100 sensor to be used with the DTI­1000 e.g. one of the JOFRA STS probes. The DTI-1000
provides 3 different linearity setups:

• Certified data pairs of ohm and reference temperature.

Use JOFRACAL for calculating and downloading of
individual coefficients from a certified sensor e.g. a
STS JOFRA probe based on “best curve fit”

• Coefficients, according to IEC 751 (Callender van Dusen)

• Coefficients according to ITS-90

DTI-1000 & STS-100 • Digital Temperature Indicator

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