PR231 Precision Multifunction Calibrator

Product video

The PR231 series products have excellent performance indicators, numerous practical functions and powerful human-interface . The series includes two  levels of accuracy, 0.01% and 0.02%. The measure and source are completely isolated, in addition to the general functions of a two-channel calibrator, it also has the measurement function of ρ value and standard temperature. The enhanced type also features a temperature difference test and a precision temperature control function. It is compact in design, portable, and suitable for on-site and laboratory applications, making it the first choice for temperature calibration.

Products Features

1.Temperature difference measurement with accuracy of 0.003 ° C
PR231A calibrator measures the temperature difference between two points in space without other instruments. When the function is used, the four terminals of the source function be used as measurement terminals and the process of the temperature difference data acqusition can be completed within 0.4 Seconds, which effectively improves the accuracy of the measurement. The stability can also be calculated in real time during the test

2.Standard temperature measurement

Different from ordinary TC and RTD measurement, the standard temperature measurement may use the certificate value for temperature traceability. The input signals include:STC - > S type, R type, B type, T type.SPRT-> Rtp = 25Ω or Rtp=100Ω.

3.Reference Junction Compensation

The reference junction compensation methods of the PR231 series calibrator are very flexible and three methods are available, namely internal, external, and customized. The external reference junction adopts Grade A Pt100, and can input the certificate value for the reference junction data correction. When PR231 series calibrator is combined with PR1501 temperature equalization compensation module, a reference junction  compensation error of less than 0.07°C can be obtained.

4.Precision temperature control function 

Using the precision temperature control function, temperature closed-loop control of the constant temperature equipment can be realized instead of the high-precision PID controller. In the case that the constant temperature equipment and grid voltage are satisfactory to the conditions, the temperature fluctuation of the equipment can be better than 0.02°C /10min

(thermostatic bath).

5.ρvalue measurement

The PR231 series calibrator can measure the duty factor of the periodic square signal and can be used to verify and calibrate the PID parameters of various digital temperature indicating regulators for time proportional output, and meet the requirements of JJG 617-1996 Verification Regulation of Digital Temperature Indicators and Controllers.

6.Thermal calculator

It is used to achieve various conversions between electric and temperature. The conversion support a variety of TCs, RTDs and thermistors.

7.Value Settings

The PR231 series calibrator has the most flexible and convenient output value setting method. It is possible to directly set the output value through the numeric keypad, or to increase the increment setting by pressing the direction key. In addition, the device has an editable phase step or slope value setting method. 

8.Sinusoidal signal output function

The verification/calibration of some process loggers, especially mechanical recorders, usually involves the operation test. In this case, the user can use the device's sinusoidal signal output function to provide signals for the verified instrument.

The verification/calibration of some process recorders (especially mechanical recorders) usually involves the operation of the test. At this time, the device's sinusoidal signal output function can be used to signal the meter.

9.Data logging function

The logging function saves measurement and output data. PR231 series calibrator has powerful record management functions. Up to 32 device numbers can be created. Each device number has 16 logging pages. Each logging page contains four kinds of basic information, namely time, measured value, output value and custom value. Basic information. Users can perform device processing, record deletion, etc. according to their needs.

Model selection table

Item	PR231A-1	PR231A-2	PR231B-1	PR231B-2
Enhancement model
Basic model
0.01 grade
0.02 grade

Basic Parameters

Weight :	990g	charging source :	100～240V AC,50～60Hz
Dimension :	225mm*130mm*53mm	Working temperature :	-10℃～50℃
Cell type :	7.4V 4400mAh, Rechargeable lithium battery	Working time :	≥20 hours（24V power off）
Preheating time :	10 minutes after preheating	Humidity :	0～80%，Non condensing
Charging time :	5 hours	Calibration period :	2 years

Performance Index 

1.Basic parameters of measurement:

Function	Range	Measurement range	Resolution	0.01 accuracy	0.02 accuracy	Remarks
Voltage	100mV	-5mV～120mV	0.1uV	0.005%RD+5uV	0.015%RD+	Input impedance
					5uV	≥80mΩ
	1V	-50mV～1.2V	1uV	0.005%RD+	0.015%RD+
	10V	-0.5V～12V	10uV	0.005%FS	0.005%FS	Input impedance
	50V	-0.5V～50V	0.1mV			≥1mΩ
Current	50mA	-5mA～50 mA	0.1uA	0.005%RD+0.005%FS	0.015%RD+	Internal resistance =10Ω
					0.005%FS
Ohm	50Ω	0Ω～50Ω	0.1mΩ	0.005%RD+5mΩ	0.015%RD+	Output 1mA current
					5mΩ
	500Ω	0Ω～500Ω	1mΩ	0.005%RD+0.005%FS	0.015%RD+
	5kΩ	0kΩ～5kΩ	10mΩ		0.005%FS	Output 0.1mA current
Thermal couple	S、R、B、K、N、J、E、T、EA2、Wre3-25、Wre5-26		0.1℃	/		According to ITS-90 scale
Cold end compensation	Internal	-10℃～60℃	0.01℃	0.5℃	0.5℃
	External			0.1℃	0.1℃
Thermal	Pt10、Pt100、 Pt200、Cu50、Cu100、BA1、BA2、JPt100、 Pt500、 Pt1000		0.01℃	/
resistance
Standard temperature	S、R、B、T、SPt25、SPt100		0.01℃	/		Need to enter the correction value
ρ-value	50S	0.001%～99.999%	0.00%	0.01%	0.01%	Input pulse width amplitude range：1V～50V
Frequency	10Hz	0.001Hz～12Hz	0.001Hz	0.01%FS	0.01%FS
	1kHz	0.00001kHz~	0.01Hz
		1.2 kHz
	100kHz	0.01kHz～	10Hz	0.1%FS	0.1%FS
		120 kHz
Temperature difference	S、R、B、K、N、J、E、T		0.01℃	/		Need to enter the correction value
	SPt25、SPt100		0.001℃

2.Basic parameters of the output function:

Function	Range	Measurement range	Resolution	0.01 accuracy	0.02 accuracy	Remarks
Voltage	100mV	-20mV～120mV	1uV	0.005%RD+5uV	0.015%RD+5uV	Maximum load current =2.5mA
	1V	-0.2mV～1.2V	10uV	0.005%RD+0.005%FS	0.015%RD+0.005%FS
	10V	-2V～12V	0.1mV
Current	30mA	-5mA～30 mA	1uA	0.005%RD+0.005%FS	0.015%RD+0.005%FS	Maximum load voltage =24V
Ohm	50Ω	0Ω～50Ω	0.1mΩ	/		According to ITS-90 scale
	500Ω	0Ω～500Ω	1mΩ
	5kΩ	0kΩ～5kΩ	10mΩ
Thermal couple	S、R、B、K、N、J、E、T、EA2、Wre3-25、Wre5-26		0.1℃	/
Thermal	Pt10、Pt100、 Pt200、Cu50、Cu100、BA1、BA2、JPt100、 Pt500、 Pt1000		0.01℃	/
resistance
Frequency	10Hz	0.001Hz～	0.001Hz	0.01%FS	0.01%FS	Maximum load current =2.5mA
/ Pulse		12 Hz
	1kHz	0.00001kHz～
		1.2 kHz	0.01Hz
	100kHz	0.01kHz～120 kHz	10Hz	0.1%FS	0.1%FS
Precision temperature control	S、R、B、K、N、J、E、T		0.01℃	/
	Pt100
24V output	Maximum voltage error: 0.3V   Ripple noise：35mVp-p(20MHz bandwidth)
	Maximum load current：70mA  Load regulation: 0.5%（10% -100% load change）

DETAILS INTRODUCE

1. Measuring function terminal area (withstand 100V DC voltage input error)

2. Output function terminal area(withstand 36V DC voltage input error)

3. Dust cover

4. Side band(length adjustable )

5. Holder

6. External Pt100 Reference point sensor interface

7. USB2.0 communication interface

8. Multi-function port (With RS232 communication, USB communication, isolated 24V voltage output, precision temperature control signal output, pressure calibration, and other functions)

9. Reset                                         

10. Supply hub（Connect the external AC power adapter）

11. Equipment nameplate                          

12. Battery13．Protective tube                                

14．Screen contrast adjusting knob

15．Battery port

a．Adjust length here

b．Unfold jacket toward this direction

c.  Holder unfold direction