"Vaiseshika" Digital Thermocouple Test Set & Calibrator Type : 7709
Description
'Vaiseshika" 41/2 Digits Digital thermocouple Test Set and Calibrator Type 7709 is a versatile equipment in the area of thermal engineering. The instrument is ideal to calibrate potentiometric recorders, platinum resistance thermometers, temperature controllers and recorders. The instruments can also be used as a thermocouple simulator with an accuracy of ± 0.02%.
A calibrated stable potential
source, continuously variable from 0 to ± 100 mV, is
provided with the test set. The potential variation can
be done with a resolution of 10µV. Similarly
thermo-e.m.f, generated across a thermocouple, in a
furnace, can be monitored with Digital Read Out
Display
in this instrument with an accuracy of ± 0.02%.
Provisions for current measurement and current simulation for the calibration of standard transducers, current loops and process control instruments are additionally provided in the instruments type : 7709 C.
A standard Wheatstone Bridge is also provided with the test set. The resistance ranging from 0.1 ohm to 100 ohm can be measured and simulated with an accuracy of ± 0.1%. The additional facility is provided to use the bridge as Standard Decade Resistance Substitution Box of accuracy ± 0.1%. The Wheatstone Bridge and Decade Resistance Box section can be used for the calibration of Platinum Resistance Thermometer and measurement of thermocouple resistance.
Vaiseshika" 41/2 Digits Digital thermocouple Test Set and Calibrator Type 7709 is a very good substitute for the traditional bridge type thermocouple test set which is cumbersome, complicated and time consuming. This instrument is convenient and provides direct reading facility in terms of LED display of bright red colour.
Specification
Range of temperature (measurable in terms of e.m.f)
: -250ºC to 2500ºC
DC Volts measurement
: 0 mV to ± 100.00 mV
Calibrated potential source
: 0 mV to ± 100 mV continuously variable through vernier and linear system.
Resolution (10 µV) (For various types
of thermocouples)
: equivalent to 0.2ºC (for J, E, T type)
: equivalent to 0.3ºC (for K type)
: equivalent to 2.0ºC (for R and S type)
: equivalent to 24ºC (for B type)
Accuracy DC Volt
: ± 0.02% of f.s.d. ± 1 digit
Input Impendence
: More than 1000 megohms
Reading Rate
: 4 reading per second
Polarity
: Bipolar with the facility of negative polarity indication
Overload
: All digits flashing and continuously blinking on overload
(f.s.d. stands for Full Scale Division. In this instrument f.s.d. is 100mV.)
Wheatstone Bridge section for RTd's calibrations
Measurement range
: 0.1 ohm to 111 ohm
Ratio arm
: 200 ohm each fixed
Variable arm
: 10 x 10, 10 x 1 and 10 x 0.1 ohm
Resolution
: 0.1 ohm
Accuracy
: ± 0.1%
Switch configuration
: Silver plated contact switches
Calibration
Operating Temperature
: 27ºC
Storage temperature
: 40ºC to 60ºC
Relative Humidity
: 45% RH + 10 %
Warm up period
: 30 minutes
Dimensions
: 45(L) x 26(D) x 11(H) cm.
Weight
: Approx. 4 Kg.
Power Source
: 230 V ± 10% AC, 50 Hz, perfectly stable and transients free AC Mains are required for stable digital read-out display.
