PR293 Series Nanovolt Microhm Thermometer

FEATURES:

  • Measurement sensitivity of 10nV / 10μΩ
  • Excellent annual stability
  • Integrated multi-channel low-noise scanner
  • High-precision CJ compensation
  • Rich temperature metrology functions
  • Data analysis function
  • Portable design

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PR293 Series Nanovolt Microhm Thermometer

PR293AS nano Volt micro Ohm Meter is a high-sensitivity multimeter optimized for performing low-level measurements. It combines low-noise voltage measurements with resistance and temperature functions, setting a new standard in low-level flexibility and performance.

Model selection table

  PR291B PR293A PR293B
Function     Model
Device type Microhm thermometer Nanovolt microhm thermometer
Resistance measurement    
Full function measurement  
Number of rear channel 2 5 2
Weight 2.7 kg(without charger) 2.85kg(without charger) 2.7kg(without charger)
Battery duration ≥6 hours
Warm-up time Valid after 30 minutes of warm-up
Dimension 230mm×220mm×105mm
Dimension of display screen Industrial-grade  7.0 inch TFT color screen
Working environment -5~30℃,≤80%RH

 

Electrical specifications

Range Data scale Resolution One year  accuracy Temperature coefficient
(ppm reading ppm range) (5℃~35℃)
  (ppm reading +ppm range)/℃
30mV -35.00000mV~35.00000mV 10nV 35 + 10.0 3+1.5
100mV -110.00000mV~110.00000mV 10nV 40 + 4.0 3+0.5
1V -1.1000000V ~1.1000000V 0.1μV 30 + 2.0 3+0.5
50V -55.00000 V~55.00000 V 10μV 35 + 5.0 3+1.0
100Ω 0.00000Ω~105.00000Ω 10μΩ 40 + 3.0 2+0.1
400Ω 0.0000Ω~410.0000Ω 0.1mΩ 40 + 3.0 2+0.1
1KΩ 0.0000000kΩ ~ 1.1000000kΩ 0.1mΩ 40 + 2.0 2+0.1
10KΩ 0.000000kΩ ~ 11.000000kΩ 1mΩ 40 + 2.0 2+0.1
50mA -55.00000 mA ~ 55.00000 mA 10nA 50 + 5.0 3+0.5

Note 1: Adopting the four-wire measurement method to measure resistance: the excitation current of 10KΩ range is 0.1mA, and the excitation current of other resistance ranges is 1mA.

Note 2: The current measurement function: current sensing resistor is 10Ω.

Note 3: The environment temperature during the test is 23℃±3℃.  

 

Temperature measurement with platinum resistance thermometers  

 

Model SPRT25 SPRT100 Pt100 Pt1000
Program   
Data scale -200.0000 ℃ ~ 660.0000℃ -200.0000 ℃ ~ 740.0000℃  -200.0000 ℃ ~ 800.0000℃
PR291/PR293 series one year accuracy At -200℃, 0.004℃ At -200℃, 0.005℃    
At 0℃, 0.013℃ At 0℃, 0.013℃ At 0℃, 0.018℃ At 0℃, 0.015℃
At 100℃, 0.018℃ At 100℃, 0.018℃ At 100℃, 0.023℃ At 100℃, 0.020℃
At 300℃, 0.027℃ At 300℃, 0.027℃ At 300℃, 0.032℃ At 300℃, 0.029℃
At600℃, 0.042℃ At 600℃, 0.043℃    
Resolution 0.0001℃

 

Temperature measurement with noble metal thermocouples

 

Model S R B
Program
Data scale  100.000 ℃ ~ 1768.000 ℃  250.000 ℃ ~ 1820.000 ℃

PR291、PR293series
one year accuracy

300℃,0.035℃ 600℃,0.051℃
600℃,0.042℃ 1000℃,0.045℃
1000℃,0.050℃ 1500℃,0.051℃
Resolution 0.001℃

Note: The above results do not include CJ compensation error.


Temperature measurement with base metal thermocouples 

 

Model K N J E T
Program
Data scale  -100.000 ℃ ~ 1300.000 ℃ -200.000 ℃ ~ 1300.000 ℃ -100.000 ℃ ~ 900.000 ℃  -90.000℃ ~ 700.000 ℃ -150.000 ℃ ~ 400.000 ℃
PR291、PR293series one year accuracy 300℃,0.022℃ 300℃,0.022℃ 300℃,0.019℃ 300℃,0.016℃  -200℃,0.040℃
600℃,0.033℃ 600℃,0.032℃ 600℃,0.030℃ 600℃,0.028℃ 300℃,0.017℃
1000℃,0.053℃ 1000℃,0.048℃ 1000℃,0.046℃ 1000℃,0.046℃  
Resolution 0.001℃

Note: The above results do not include CJ compensation error.


Technical specifications of built-in thermocouple CJ compensation 

Program PR293A PR293B
Data scale -10.00 ℃ ~ 40.00 ℃
One year accuracy 0.2 ℃
Resolution 0.01 ℃
Channels number 5 2
Maximum difference between channels 0.1℃