R5850-NIST Multi-Function Calibrator W/Nist Cert front view on white background

Reed Instruments R5850-NIST Multi-Function Process Calibrator

by Reed Instruments

$3,315.00

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The Essential Field Tool for Precision Process Control and Calibration

The REED Instruments R5850-NIST is a high-accuracy, handheld solution for the calibration and troubleshooting of process control instrumentation.

Designed for versatility, the R5850 can both source (simulate) and measure a wide range of signals, including DC voltage, DC current (mA), eight types of thermocouples, and two types of RTDs. With the included NIST-Traceable Calibration Certificate, this tool provides the documented measurement integrity required for chemical plants, water treatment facilities, and pharmaceutical manufacturing.

Key Technical Advantages

Comprehensive Source/Measure Capability: Eliminate the need for multiple tools by simulating and measuring 0-10V DC and 0-22mA DC signals in a single device.
Universal Temperature Calibration: Supports the most common industrial sensors, including J, K, T, E, R, S, B, and N-type thermocouples, as well as Pt100 and Cu50 RTDs.
Integrated 24V Loop Power: Power and test 2-wire loops simultaneously, making it an all-in-one solution for transmitter maintenance.
Documented Accuracy: Ships with a NIST-traceable certificate containing full data and uncertainties, ensuring compliance with ISO and regulatory safety standards.
Field-Ready Design: Features an easy-to-read backlit LCD, internal memory for storing calibration set-points, and a rugged housing built for industrial environments.

Ideal Applications for the REED R5850-NIST

Industrial Transmitter Calibration: Verify and adjust 4-20mA pressure, flow, and level transmitters.
HVAC/R Control Systems: Test and simulate temperature sensors (RTDs/Thermocouples) for large-scale climate control.
PLC and DCS Troubleshooting: Inject known signals into control systems to verify programming logic and I/O performance.
Chemical & Water Treatment: Maintain precise sensor accuracy in environments where chemical dosing depends on exact measurements.
Pharmaceutical & Food Processing: Ensure thermal monitoring equipment meets strict FDA and health safety compliance through traceable calibration.

Specifications

Measure Function

DC Voltage
Range	50, 500mV, 30V (upper display), 50V (lower display)
Resolution	0.001, 0.01, 1mV, 0.001V
Accuracy	50mV: ±(0.02% +10) / 500mV: ±(0.02% +5)
	30V (upper display): ±(0.02% +2) / 50V (lower display): ±(0.02% +2)

DC Current
Range	20mA at 0 to 24mA
Resolution	0.001mA
Accuracy	±(0.02% +2)

Loop Current
Range	20mA (loop) at 0 to 24mA
Resolution	0.001mA
Accuracy	±(0.02% +2)

Resistance
Range	500, 5000Ω
Resolution	0.01, 0.1Ω
Accuracy	±(0.05% +10)

Frequency
Range	100Hz, 1, 10, 100kHz
Resolution	0.01, 0.1, 1Hz
Accuracy	±(0.01% +1)

Thermocouples

Type R and Type S
Range	32 to 3212.6°F (0 to 1767°C)
Resolution	1°F/°C
Accuracy	32 to 932°F (0 to 500°C): ±3.24°F (±1.8°C)
	32 to 932°F (0 to 500°C): ±3.24°F (±1.8°C)

Type B
Range	1112 to 3308°F (600 to 1820°C)
Resolution	1°F/°C
Accuracy	1112 to 1472°F (600 to 800°C): ±3.96°F (±2.2°C)
	1472 to 1832°F (800 to 1000°C): ±3.24°F (±1.8°C)
	1832 to 3308°F (1000 to 1820°C): ±2.52°F (±1.4°C)

Type E
Range	-58 to 1832°F (-50 to 1000°C)
Resolution	0.1°F/°C
Accuracy	-58 to 32°F (-50 to 0°C): ±1.62°F (±0.9°C)
	32 to 1832°F (0 to 1000°C): ±2.7°F (±1.5°C)

Type K
Range	-148 to 2501.6°F (-100 to 1372°C)
Resolution	0.1°F/°C
Accuracy	-148 to 32°F (-100 to 0°C): ±2.16°F (±1.2°C)
	32 to 2501.6°F (0 to 1372°C): ±1.44°F (±0.8°C)

Type J
Range	-76 to 2192°F (-60 to 1200°C)
Resolution	0.1°F/°C
Accuracy	-76 to 32°F (-60 to 0°C): ±1.8°F (±1°C)
	32 to 2192°F (0 to 1200°C): ±1.26°F (±0.7°C)

Type T
Range	-148 to 752°F (-100 to 400°C)
Resolution	0.1°F/°C
Accuracy	-148 to 32°F (-100 to 0°C): ±1.8°F (±1°C)
	32 to 752°F (0 to 400°C): ±1.26°F (±0.7°C)

Type N
Range	-328 to 2372°F (-200 to 1300°C)
Resolution	0.1°F/°C
Accuracy	-328 to -148°F (-200 to -100°C): ±1.8°F (±1°C)
	-148 to 1652°F (-100 to 900°C): ±1.26°F (±0.7°C)
	1652 to 2372°F (900 to 1300°C): ±1.44°F (±0.8°C)

Type L
Range	-328 to 1652°F (-200 to 900°C)
Resolution	0.1°F/°C
Accuracy	-328 to 32°F (-200 to 0°C): ±1.53°F (±0.85°C)
	32 to 1652°F (0 to 900°C): ±1.26°F (±0.7°C)

Type U
Range	328 to 752°F (-200 to 400°C)
Resolution	0.1°F/°C
Accuracy	-328 to 32°F (-200 to 0°C): ±1.98°F (±1.1°C)
	32 to 752°F (0 to 400°C): ±1.35°F (±0.75°C)

Type XK
Range	-328 to 1472°F (-200 to 800°C)
Resolution	0.1°F/°C
Accuracy	-328 to -148°F (-200 to -100°C): ±0.9°F (±0.5°C)
	-148 to 1472°F (-100 to 800°C): ±1.08°F (±0.6°C)

Type BP
Range	32 to 4532°F (0 to 2500°C)
Resolution	0.1°F/°C
Accuracy	32 to 1472°F (0 to 800°C): ±2.16°F (±1.2°C)
	1472 to 4532°F (800 to 2500°C): ±4.5°F (±2.5°C)

RTDs

Pt100 (2-wire/3-wire)
Range	-328 to 1562°F (-200 to 850°C)
Resolution	0.1°F/°C
Accuracy	±0.72°F (±0.4°C)

Pt100 (4-wire)
Range	-328 to 1562°F (-200 to 850°C)
Resolution	0.1°F/°C
Accuracy	±0.54°F (±0.3°C)

Pt200 (2-wire/3-wire)
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	-328 to 482°F (-200 to 250°C): ±0.54°F (±0.3°C)
	482 to 1166°F (250 to 630°C): ±2.88°F (±1.6°C)

Pt200 (4-wire)
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	-328 to 482°F (-200 to 250°C): ±0.36°F (±0.2°C)
	482 to 1166°F (250 to 630°C): ±1.44°F (±0.8°C)

Pt500 (2-wire/3-wire)
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	-328 to 932°F (-200 to 500°C): ±1.08°F (±0.6°C)
	932 to 1166°F (500 to 630°C): ±1.62°F (±0.9°C)

Pt500 (4-wire)
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	-328 to 932°F (-200 to 500°C): ±0.54°F (±0.3°C)
	932 to 1166°F (500 to 630°C): ±0.72°F (±0.4°C)

Pt1000 (2-wire/3-wire)
Range	-328 to 1202°F (-200 to 650°C)
Resolution	0.1°F/°C
Accuracy	±0.54°F (±0.3°C)

Pt1000 (4-wire)
Range	-328 to 1202°F (-200 to 650°C)
Resolution	0.1°F/°C
Accuracy	±0.27°F (±0.15°C)

Cu10
Range	-148 to 500°F (-100 to 260°C)
Resolution	0.1°F/°C
Accuracy	±3.24°F (±1.8°C)

Cu50 (2-wire/3-wire)
Range	-58 to 302°F (-50 to 150°C)
Resolution	0.1°F/°C
Accuracy	±1.44°F (±0.8°C)

Cu50 (4-wire)
Range	-58 to 302°F (-50 to 150°C)
Resolution	0.1°F/°C
Accuracy	±0.9°F (±0.5°C)

Cu100 (2-wire/3-wire)
Range	-58 to 302°F (-50 to 150°C)
Resolution	0.1°F/°C
Accuracy	±0.72°F (±0.4°C)

Cu100 (4-wire)
Range	-58 to 302°F (-50 to 150°C)
Resolution	0.1°F/°C
Accuracy	±0.45°F (±0.25°C)

Pt100-392 (2-wire/3-wire)
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	±0.9°F (±0.5°C)

Pt100-392 (4-wire)
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	±0.54°F (±0.3°C)

Pt100-JIS (2-wire/3-wire)
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	±0.9°F (±0.5°C)

Pt100-JIS (4-wire)
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	±0.54°F (±0.3°C)

Ni120 (2-wire/3-wire)
Range	-112 to 500°F (-80 to 260°C)
Resolution	0.1°F/°C
Accuracy	±0.54°F (±0.3°C)

Ni120 (4-wire)
Range	-112 to 500°F (-80 to 260°C)
Resolution	0.1°F/°C
Accuracy	±0.36°F (±0.2°C)

Source Function

DC Voltage
Range	100mV, 1, 10V
Resolution	0.001, 0.01mV, 0.0001V
Accuracy	±(0.02% +10)

DC Current
Range	20mA at 0 to 24mA / 20mA (SIM) at 0 to 24mA
Resolution	0.001mA
Accuracy	±(0.02% +2)

Resistance
Range	400, 4000Ω, 40kΩ
Resolution	0.01, 0.1, 1Ω
Accuracy	±(0.02% +8) / ±(0.05% +10) / ±(0.1% +40)

Frequency
Range	200, 2000Hz, 20, 100kHz
Resolution	0.01, 0.1, 1, 10Hz
Accuracy	±(0.01% +1) (±3 dgt.), 100kHz: ±5 dgt.

Pulse
Range	100Hz, 1, 10kHz
Resolution	1 cyc
Accuracy	±2 dgt.

Switch Quantity
Range	100Hz, 1, 10, 100kHz
Resolution	0.01, 0.1, 1, 10Hz
Accuracy	±2 dgt.

Thermocouples

Type R and Type S
Range	32 to 3212.6°F (0 to 1767°C)
Resolution	1°F/°C
Accuracy	32 to 212°F (0 to 100°C): ±2.7°F (±1.5°C)
	212 to 3212.6°F (100 to 1767°C): ±2.16°F (±1.2°C)

Type B
Range	1112 to 3308°F (600 to 1820°C)
Resolution	1°F/°C
Accuracy	1112 to 1472°F (600 to 800°C): ±2.7°F (±1.5°C)
	1472 to 3308°F (800 to 1820°C): ±1.98°F (±1.1°C)

Type E
Range	-328 to 1832°F (-200 to 1000°C)
Resolution	0.1°F/°C
Accuracy	-328 to -148°F (-200 to -100°C): ±1.08°F (±0.6°C)
	-148 to 1112°F (-100 to 600°C): ±0.9°F (±0.5°C)
	1112 to 1832°F (600 to 1000°C): ±0.72°F (±0.4°C)

Type K
Range	-328 to 2501.6°F (-200 to 1372°C)
Resolution	0.1°F/°C
Accuracy	-328 to -148°F (-200 to -100°C): ±1.08°F (±0.6°C)
	-148 to 752°F (-100 to 400°C): ±0.9°F (±0.5°C)
	752 to 2192°F (400 to 1200°C): ±1.26°F (±0.7°C)
	2192 to 2501.6°F (1200 to 1372°C): ±1.62°F (±0.9°C)

Type J
Range	-328 to 2192°F (-200 to 1200°C)
Resolution	0.1°F/°C
Accuracy	-200 to -148°F (-200 to -100°C): ±1.08°F (±0.6°C)
	-148 to 1472°F (-100 to 800°C): ±0.9°F (±0.5°C)
	1472 to 2192°F (800 to 1200°C): ±1.26°F (±0.7°C)

Type T
Range	-418 to 752°F (-250 to 400°C)
Resolution	0.1°F/°C
Accuracy	±1.08°F (±0.6°C)

Type L
Range	-328 to 1652°F (-200 to 900°C)
Resolution	0.1°F/°C
Accuracy	-328 to 32°F (-200 to 0°C): ±1.53°F (±0.85°C)
	32 to 1652°F (0 to 900°C): ±1.26°F (±0.7°C)

Type U
Range	-328 to 752°F (-200 to 400°C)
Resolution	0.1°F/°C
Accuracy	-328 to 32°F (-200 to 0°C): ±1.98°F (±1.1°C)
	32 to 752°F (0 to 400°C): ±1.35°F (±0.75°C)

Type XK
Range	-328 to 1472°F (-200 to 800°C)
Resolution	0.1°F/°C
Accuracy	-328 to -148°F (-200 to -100°C): ±0.9°F (±0.5°C
	-148 to 1472°F (-100 to 800°C): ±1.08°F (±0.6°C)

Type BP
Range	32 to 4532°F (0 to 2500°C)
Resolution	0.1°F/°C
Accuracy	32 to 1472°F (0 to 800°C): ±2.16°F (±1.2°C)
	1472 to 4532°F (800 to 2500°C): ±4.5°F (±2.5°C)

RTDs

Pt100-385
Range	-328 to 1472°F (-200 to 800°C)
Resolution	0.1°F/°C
Accuracy	±0.6°F (±0.33°C)

Pt100-392
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	±0.54°F (±0.3°C)

Pt200-385
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	-328 to 482°F (-200 to 250°C): ±0.36°F (±0.2°C)
	482 to 1166°F (250 to 630°C): ±1.44°F (±0.8°C)

Pt200 (4-wire)
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	-328 to 482°F (-200 to 250°C): ±0.36°F (±0.2°C)
	482 to 1166°F (250 to 630°C): ±1.44°F (±0.8°C)

Pt100-JIS
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	±0.54°F (±0.3°C)

Pt500-385
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	-328 to 932°F (-200 to 500°C): ±0.54°F (±0.3°C)
	932 to 1166°F (500 to 630°C): ±0.72°F (±0.4°C)

Pt1000-385
Range	-328 to 1166°F (-200 to 630°C)
Resolution	0.1°F/°C
Accuracy	±3.24°F (±1.8°C)

Cu10
Range	-148 to 500°F (-100 to 260°C)
Resolution	0.1°F/°C
Accuracy	±3.24°F (±1.8°C)

Cu50
Range	-58 to 302°F (-50 to 150°C)
Resolution	0.1°F/°C
Accuracy	±0.9°F (±0.5°C)

Cu100
Range	-58 to 302°F (-50 to 150°C)
Resolution	0.1°F/°C
Accuracy	±0.45°F (±0.25°C)

Ni120
Range	-112 to 500°F (-80 to 260°C)
Resolution	0.1°F/°C
Accuracy	±0.36°F (±0.2°C)

Function Specifications

Ramp Functions
Source functions	Voltage, Current, Resistance, Frequency, Temperature
Ramps	Slow ramp, fast ramp, 25% step-ramp

Loop Power Function
Voltage	24V
Accuracy	10%
Maximum current	22mA, short circuit protected

Step Functions
Source functions	Voltage, Current, Resistance, Frequency, Temperature
Steps	25% of range, 100% of range

General Specifications

Display	20,000 count TFT color LCD display
Kick Stand	Yes
Power Supply	1.2V x 6 AA rechargeable batteries
Auto Shut-off	Yes
Low Battery Indicator	Yes
Replaceable Test Leads	Yes
Product Certifications	CE, RoHS
Operating Temperature	14 to 131°F (-10 to 55°C)
Operating Humidity Range	≤95%
Storage Temperature	-4 to 158°F (-20 to 70°C)
Max. Operating Altitude	6561' (2000m)
Dimensions	7.7 x 3.7 x 2.3" (195 x 95 x 58mm)
Weight	650g (22.92oz)

Included

REED R5850 Multi-Function Process Calibrator: A high-precision source and measure instrument with a built-in 24V loop power supply.
Traceable Calibration Certificate: Official NIST-traceable documentation with full data and uncertainties for audit readiness.
Set of Professional Test Leads: High-quality leads for secure connection to transmitters and control loops.
Alligator Clips: Large-grip clips for hands-free testing of terminal blocks and bus bars.
Hard Carrying Case: A durable, impact-resistant protective case with custom-molded foam inserts.
Batteries: Standard power cells included for immediate deployment.

Resources

Datasheet for the R5850-NIST Multi-Function Calibrator

Manual for the R5850-NIST Multi-Function Calibrator

Reed Instruments R5850-NIST Multi-Function Process Calibrator

Shipping & Availability

Notify me when back in stock

The Essential Field Tool for Precision Process Control and Calibration

Key Technical Advantages

Ideal Applications for the REED R5850-NIST

Specifications

Measure Function

Thermocouples

RTDs

Source Function

Thermocouples

RTDs

Function Specifications

General Specifications

Included

Resources

Added to your cart:

The Essential Field Tool for Precision Process Control and Calibration

Key Technical Advantages

Ideal Applications for the REED R5850-NIST

Measure Function

Thermocouples

RTDs

Source Function

Thermocouples

RTDs

Function Specifications

General Specifications