Product Introduction
The MOEORW-W821 is a high-precision portable multi-functional process calibrator with independent dual-screen displays . It supports the measurement and analog output of signals such as voltage, current, resistance, frequency, thermocouple, and RTD. It has a built-in 24V isolated loop power supply and can directly calibrate two-wire transmitters.
The instrument supports customizable ranges, step/slope/step outputs , and is easy to operate; it features IP67 protection and 220V misconnection protection , ensuring safety and durability. It is rechargeable, supports PC communication, and is suitable for industrial field instrument calibration and maintenance.
Product Parameter (specification)
Unless otherwise stated, all specifications are based on a one-year calibration cycle and apply to a temperature range of +18°C to +28°C. All specifications assume a 10-minute warm-up time.
DC Voltage Measurement
|
Range |
Maximum measurement range |
Resolution |
Accuracy (% of reading + count) |
|
|
0.05% |
0.02% |
|||
|
28V (Upper part of the display screen) |
-33V～33V |
0.001V |
0.05+2 |
0.025+2 |
|
200mV (Upper part of the display screen) |
-80mV～80mV |
0.001mV |
0.05+20 |
0.025+20 |
|
-200mV～200mV |
0.01mV |
0.05+2 |
0.025+2 |
|
|
50V (Lower part of the display screen) |
-1V～60V |
0.001V |
0.05+2 |
0.02+2 |
|
100mV (Lower part of the display screen) |
-15mV～80mV |
0.001mV |
0.05+20 |
0.02+20 |
|
80mV～125mV |
0.01mV |
0.05+2 |
0.02+2 |
|
|
Temperature coefficient for -10℃～18℃, +28℃～55℃: ±0.005%FS/℃. Input resistance: >1MΩ. |
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DC Voltage Output
|
Range |
Maximum output range |
Resolution |
Accuracy (% of reading + count) |
|
|
0.05% |
0.02% |
|||
|
100mV |
-15mV～9 2. 999mV |
0.001mV |
0.05+20 |
0.02+20 |
|
100mV～125mV |
0.01mV |
0.05+2 |
0.02+2 |
|
|
10V |
0～11V |
0.001V |
0.05+2 |
0.02+2 |
|
Temperature coefficient for -10℃～18℃, +28℃～55℃: ±0.005%FS/℃. Maximum load: 1mA or 1kΩ, depending on the light load. |
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DC Current Measurement
|
Range |
Maximum measurement range |
Resolution |
Accuracy (% of reading + count) |
|
|
0.05% |
0.02% |
|||
|
20mA (Upper part of the display screen) |
-24mA～24mA |
0.001mA |
0.05+2 |
0.025+2 |
|
20mA (Loop current at the top of the display screen) |
0～24mA |
0.001mA |
0.05+2 |
0.025+2 |
|
20mA (Lower part of the display screen) |
0～24mA |
0.001mA |
0.05+2 |
0.02+2 |
|
Temperature coefficient for -10℃～18℃, +28℃～55℃: ±0.005%FS/℃. Input resistance: <100Ω. |
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DC Current Output
|
Range |
Maximum output range |
Resolution |
Accuracy (% of reading + count) |
|
|
0.05% |
0.02% |
|||
|
20mA |
0～24mA |
0.001mA |
0.05+2 |
0.02+2 |
|
20mA (Transmitter simulation) |
0～24mA |
0.001mA |
0.05+2 |
0.02+2 |
|
Temperature coefficient for -10℃～18℃, +28℃～55℃: ±0.005%FS/℃. Maximum load voltage: 20V, equivalent to the voltage across a 1000Ω load resistor when a 20mA current is applied. |
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Resistance Measurement (Upper part of the display screen)
|
Range |
Maximum measurement range |
Resolution |
Accuracy (% of reading + count) |
|
|
0.05% |
0.02% |
|||
|
400Ω |
0～440Ω |
0.1Ω |
0.05+2 |
|
|
3200Ω |
420Ω～3300Ω |
1Ω |
||
|
continuity test |
0～200Ω |
1Ω |
0.05+1 |
|
|
Temperature coefficient for -10℃～18℃, +28℃～55℃: ±0.005%FS/℃. Maximum load voltage: 20V, equivalent to the voltage across a 1000Ω load resistor when a 20mA current is applied. |
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Resistance Measurement (Lower part of the display screen)
|
Range |
Maximum measurement range |
Resolution |
Accuracy (Ω) |
|||
|
0.05% |
0.02% |
|||||
|
2 lines 3 lines |
4 lines |
2 lines 3 lines |
4 lines |
|||
|
400Ω |
0～440Ω |
0.01Ω |
0.25 |
0.15 |
0.15 |
0.10 |
|
3200Ω |
420Ω～3600Ω |
0.1Ω |
1.5 |
1.0 |
1.0 |
0.5 |
|
Temperature coefficient for -10℃～18℃, +28℃～55℃: ±0.005%FS/℃. Excitation current during measurement: 400Ω: 0.4mA±10%; 3200Ω: 0.2mA±10%. 2-line: Its error does not include the resistance of the wire. 3-wire: Matched test leads should be used, with a total resistance of no more than 25 Ω. |
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Resistance Output
|
Range |
Maximum output range |
Resolution |
External excitation current |
Accuracy (Ω) |
|
|
0.05% |
0.02% |
||||
|
400Ω |
0～440Ω |
0.01Ω |
0.40mA～3.30mA |
0.25 |
0.15 |
|
3200Ω |
400～3600Ω |
0.1Ω |
0.1mA～0.6mA |
1.0 |
0.50 |
|
Temperature coefficient for -10℃～18℃, +28℃～55℃: ±0.005%FS/℃. |
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Frequency Measurement
|
Range |
Maximum measurement range |
Resolution |
Accuracy (% of reading + count) |
|
|
0.05% |
0.02% |
|||
|
100Hz |
1 ~ 99.999Hz |
0.001Hz |
0.02+1 |
0.01+1 |
|
1000Hz |
100 ~ 999.99Hz |
0.01Hz |
||
|
10kHz |
1k ~ 9.9999kHz |
0.1Hz |
||
|
100kHz |
10kHz ~ 99.999kHz |
1Hz |
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|
Sensitivity: 10Hz～10kHz, Vp-p≥1V; Vp-p≥2V for the rest. Waveform: Square wave. For other waveforms, an additional 5 counts are needed to measure the error. Mains frequency can be measured directly. |
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Frequency Output
|
Range |
Maximum output range |
Resolution |
Accuracy (% of reading + count) |
|
|
0.05% |
0.02% |
|||
|
200Hz |
0~200Hz |
0.01Hz |
0.02+1 |
0.01+1 |
|
2000Hz |
0~2000Hz |
0.1Hz |
||
|
20kHz |
0~20kHz |
1Hz |
||
|
Output amplitude: ≥4.5Vp-p; Waveform: Square wave. |
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Temperature, Thermocouple
|
Division number |
Range |
Resolution |
Accuracy (°C) |
|
|
0.05% |
0.02% |
|||
|
J |
-200℃～0℃ 0℃～1200℃ |
0.1℃ |
1.5℃ 1.0℃ |
1.0℃ 0.7℃ |
|
K |
-200℃～0℃ 0℃～1370℃ |
0.1℃ |
1.8℃ 1.2℃ |
1.2℃ 0.8℃ |
|
T |
-200℃～0℃ 0℃～400℃ |
0.1℃ |
1.8℃ 1.2℃ |
1.2℃ 0.8℃ |
|
E |
-200℃～0℃ 0℃～950℃ |
0.1℃ |
1.5℃ 1.0℃ |
0.9℃ 0.7℃ |
|
R |
-20℃～0℃ 0℃～500℃ 500℃～1750℃ |
0.1℃ |
4℃ 2.5℃ 2℃ |
2.5℃ 1.8℃ 1.4℃ |
|
S |
-20℃～0℃ 0℃～500℃ 500℃～1750℃ |
0.1℃ |
4℃ 2.5℃ 2℃ |
2.5℃ 1.8℃ 1.5℃ |
|
B |
600℃～800℃ 800℃～1000℃ 1000℃～1800℃ |
0.1℃ |
3.5℃ 2.5℃ 2℃ |
2.2℃ 1.8℃ 1.4℃ |
|
N |
-200℃～0℃ 0℃～1300℃ |
0.1℃ |
2.0℃ 1.2℃ |
1.5℃ 0.9℃ |
|
The errors in this table do not include the error of cold junction compensation temperature. Cold end temperature compensation accuracy: 1.5℃. |
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Temperature, Thermal Resistance
|
Division number |
Range |
Resolution |
Accuracy (°C) |
|||||
|
0.05% |
0.02% |
|||||||
|
2 lines and 3 lines |
4 lines |
Output |
2 lines and 3 lines |
4 lines |
Output |
|||
|
Pt100 |
-200 ℃～ 850 ℃ |
0.1 ℃ |
0.7 |
0.4 |
0.7 |
0.4 |
0.3 |
0.3 |
|
Pt1000 |
-200 ℃～ 650 ℃ |
0.4 |
0.3 |
0.3 |
0.3 |
0.15 |
0.15 |
|
|
Cu50 |
-50 ℃～ 150 ℃ |
1.2 |
0.8 |
0.8 |
0.8 |
0.5 |
0.5 |
|
|
Cu100 |
-50 ℃～ 150 ℃ |
0.7 |
0.4 |
0.4 |
0.4 |
0.25 |
0.25 |
|
|
Please refer to the resistance measurement function for the excitation current during measurement. For the allowable external excitation current during output, please refer to the resistor output function. 2- line: Its error does not include the resistance of the wire. 3- wire: Matched test leads should be used, with a total resistance of no more than 25 Ω. |
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Product features and applications
1)The dual-screen independent operation with isolated upper and lower screens allows for simultaneous measurement and output, resulting in greater efficiency.
2)Full-featured signal calibration supports voltage, current, resistance, frequency, thermocouple, and RTD measurements and analog output.
3)The built-in isolated loop power supply provides 24V isolated power, allowing for the calibration of two-wire transmitters without the need for an external power supply.
4)The intelligent output mode supports custom range, step, slope, and 0~100% step fast output.
5)High-security protection IP67, waterproof and dustproof, all ports support automatic protection against accidental connection to 220V.
6)Portable industrial design, rechargeable battery powered, supports PC communication, suitable for long-term field use.
Prodection details
1)Industrial field instrument calibration: Field calibration of transmitters, controllers, display instruments and other process instruments.
2)Temperature instrument testing: Measurement and simulation calibration of thermocouples, resistance temperature detectors, and temperature transmitters.
3)Of control circuits, including 4-20mA current circuits and voltage/frequency signal circuits.
4)Equipment installation and maintenance: instrument installation, repair, troubleshooting, and accuracy verification.
5)Multi-industry on-site operations in industrial scenarios such as power, chemical, metallurgy, manufacturing, and HVAC.
Company Qualifications
FAQ
Q: Are you a factory or a trading company?
A: We are a professional manufacturer of testing equipment.
Q: How is the after-sales service?
A: The warranty period is 12 months. After the warranty period, we also provide lifetime service paidrepair or service.
Q: How is the after-sales service?
A: The warranty period is 12 months. After the warranty period, we also provide lifetime service paidrepair or service.
Q: What about transportation?
A: It depends on your requirements. We can ship to your airport by air, to your seaport by sea, or to your office by courier.
We also accept cooperation with your shipping agent.
Q: Are your keyboard, interface, software, and manuals in English?
A: Yes, if you are using the English version of the keyboard, interface, software, and manual and require other languages, please contact us for confirmation.
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