JT-11A ultra-precision Pt200, Pt500, Pt100, Pt50, P25
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Keywords： JT-11A ultra-precision Pt200, Pt500, Pt100, Pt50, P25
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Product Description
User-defined thermal resistance B/R/S/N/K/J/T/E thermocouple/thermopile
Number of input channels: 2
Main function: sensor matching, to achieve ultra-high precision measurement.
Max-Min, Average, Max-Min display.
Overlimit alarm.
C/F/K/Ω/mv measurement unit switching.
Data storage how much 390000 pen, including time information.
USB data directly connected to the computer.
Power supply: 6 ~ 15VDC external power supply or 4 AAA batteries.
Communication rate: 1200/2400/4800/9600/19200/38400bps
Uses:(1) precision detection of resistance, platinum resistance temperature corresponding resistance detection to save the consumption of second-class standard thermometer.
(2) Acceptance of thermostatic box temperature field.
(3.1) One channel is connected to a thermometer (second-class standard or JWPt100 thermometer), and the other channel is connected to the measured platinum resistance.
(3.2) One channel is connected to a second-class standard thermometer, and the other channel is connected to a JWPt100 thermometer for comparison and verification of the JWPt100 thermometer or to re-develop a JWPt100 indexing truth table based on the measurement data.
Resistance measurement accuracy (AT 25 ℃):
Range | Sampling mode | Resolution (typical) Ω | Error (max) Ω |
300Ω | Ω | 0.0001 | ±（0.0005 + 0.0006%*READ） |
TRUEO | |||
3kΩ | Ω | 0.006 | ±（0.01 + 0.005%*READ） |
TRUEO |
DC voltage measurement accuracy (AT 25 ℃):
Range mV | Resolution (typical) uV | Error (max) uV |
70 | 0.1 | ±(1 + 0.004%*READ) |
Resistance measurement accuracy (AT 25 ℃): temperature drift
Project | Impact per 1 ℃ of environmental change (maximum) |
Resistance | 2ppm*READ |
Voltage | 7ppm*READ |
Resistance measurement accuracy (AT 25 ℃): electrical performance
The parameter conditions given in this table are: ambient temperature 25 ℃, power supply voltage 6V, dual-channel resistor sampling, and range 300 Ω.
Project | Condition | Typical value | |
Working current | Backlight on | 13.5mA | |
Turn off backlight | 11mA | ||
Resistance measurement sampling time | Step change> 3mΩ, two channels simultaneously measure resistance | High resolution | Low resolution |
6s | 2s | ||
| Step change <3mΩ, two-channel simultaneous measurement of resistance | High resolution | Low resolution | |
18s | 6s | ||
Voltage measurement sampling time | two-channel simultaneous measurement of mv | 0.5s | |
Thermocouple measurement sampling time | Simultaneous measurement of thermocouple signals with two channels | High resolution | Low resolution |
6.5s | 2.5s | ||
Resistance measurement accuracy (AT 25 ℃): the overall accuracy after matching with the sensor
Enter model number | Range (℃) | Accuracy (℃) |
PT100 | 0~650 | ＜±0.01 |
PT50 | 0~650 | ＜±0.03 |
T-type thermocouple | -200~-50 | ＜±0.3 |
N-type thermocouple | 0~400 | ＜±0.3 |
S-type thermocouple | 0~600 | ＜±0.5 |
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