Fluke 9144 Calibration Metrology Well

Small dry wells for big field applications

The 9144 Series Field Metrology Wells extend high performance to the industrial process environment by maximizing portability, speed, and functionality with little compromise to metrology performance.

Field Metrology Wells are packed with functionality and are remarkably easy to use. They are lightweight, small, and quick to reach temperature set points, yet they are stable, uniform, and accurate. These industrial temperature loop calibrators are perfect for performing transmitter loop calibrations, comparison calibrations, or simple checks of thermocouple sensors. With the “process” option, there is no need to carry additional tools into the field. This optional built-in two-channel readout reads resistance, voltage, and 4–20 mA current with 24 volt loop power. It also has on-board automation and documentation. Combined, the three models (9142, 9143, and 9144—each with a “process” option) cover the wide range of –25°C to 660°C.

High performance for the industrial environment

Field Metrology Wells are designed for the industrial process environment. They weigh less than 8.2 kg (18 lb) and have a small footprint, which makes them easy to transport. Optimized for speed, Field Metrology Wells cool to –25°C in 15 minutes and heat to 660°C in 15 minutes.

Field environment conditions are typically unstable, having wide temperature variations. Each Field Metrology Well has a built-in gradient-temperature compensation (patent pending) that adjusts control characteristics to ensure stable performance in unstable environments. In fact, all specifications are guaranteed over the environmental range of 13°C to 33°C.

Base Unit Specifications
Temperature range at 23°C	50°C to 660°C (122°F to 1220°F)
Display accuracy	±0.35°C at 50°C ±0.35°C at 420°C ±0.5°C at 660°C
Stability	±0.03°C at 50°C ±0.04°C at 420°C ±0.05°C at 660°C
Axial uniformity at 40 mm (1.6 in)	±0.05°C at 50°C ±0.35°C at 420°C ±0.5°C at 660°C
Radial uniformity	±0.02°C at 50°C ±0.05°C at 420°C ±0.10°C at 660°C
Loading effect (with a 6.35 mm reference probe and three 6.35 mm probes)	±0.015°C at 50°C ±0.025°C at 420°C ±0.035°C at 660°C
Hysteresis	0.1
Operating conditions	0°C to 50°C, 0% to 90% RH (non-condensing)
Environmental conditions (for all specifications except temperature range)	13°C to 33°C
Immersion (well) depth	150 mm (5.9 in)
Insert OD	24.4 mm (0.96 in)
Heating time	15 min: 50°C to 660°C
Cooling time	25 min: 660°C to 100°C 35 min: 660°C to 50°C
Resolution	0.01°
Display	LCD, °C or °F user-selectable
Size (H x W x D)	290 x 185 x 295 mm (11.4 x 7.3 x 11.6 in)
Weight	7.7 kg (17 lb)
Power requirements	100 V to 115 V (±10%), 50/60 Hz, 1400 W 230 V (±10%), 50/60 Hz, 1800 W
Computer interface	RS-232 and 9930 Interface-it control software included
-P Specifications
Built-in reference thermometer readout accuracy (4-wire reference probe)¹	±0.010°C at -25°C ±0.015°C at 0°C ±0.020°C at 50°C ±0.025°C at 150°C ±0.030°C at 200°C ±0.040°C at 350°C ±0.050°C at 420°C ±0.070°C at 660°C
Reference resistance range	0 ohms to 400 ohms
Reference resistance accuracy²	0 ohms to 42 ohms: ±0.0025 ohms 42 ohms to 400 ohms: ±60 ppm of reading
Reference characterizations	ITS-90, CVD, IEC-751, Resistance
Reference measurement capability	4-wire
Reference probe connection	6-pin Din with Infocon Technology
Built-in RTD thermometer readout accuracy	NI-120: ±0.015°C at 0°C PT-100 (385): ±0.02°C at 0°C PT-100 (3926): ±0.02°C at 0°C PT-100 (JIS): ±0.02°C at 0°C
RTD resistance range	0 ohms to 400 ohms
RTD resistance accuracy²	25 ohms to 400 ohms: ±80 ppm of reading 0 ohms to 25 ohms: ±0.002 ohms
RTD characterizations	PT-100 (385),(JIS),(3926), NI-120, Resistance
RTD measurement capability	4-wire RTD (2-,3-wire RTD w/ Jumpers only)
RTD connection	4 terminal input
Built-in TC thermometer readout accuracy	Type J: ±0.7°C at 660°C Type K: ±0.8°C at 660°C Type T: ±0.8°C at 400°C Type E: ±0.7°C at 660°C Type R: ±1.4°C at 660°C Type S: ±1.5°C at 660°C Type M: ±1.4°C at 660°C Type L: ±0.7°C at 660°C Type U: ±0.75°C at 600°C Type N: ±0.9°C at 660°C Type C: ±1.1°C at 660°C
TC millivolt range	–10 mV to 75 mV
Voltage accuracy	0.025% of reading + 0.01 mV
Internal cold junction compensation accuracy	±0.35°C (ambient of 13°C to 33°C)
TC connection	Small connectors
Built-in mA readout accuracy	0.02% of reading + 2 mV
mA range	Cal 4-22 mA, Spec 4-24 mA
mA connection	2 terminal input
Loop power function	24 V DC loop power
Built-in electronics temperature Coefficient (0°C to 13°C, 33°C to 50°C)	±0.005% of range per°C
1. The temperature range may be limited by the reference probe connected to the readout. The Built-In Reference Thermometer Readout Accuracy does not include the sensor probe accuracy. It does not include the probe uncertainty or probe characterization errors. 2. Measurement accuracy specifications apply within the operating range and assume 4-wires for PRTs. With 3-wire RTDs add 0.05 ohms to the measurement accuracy plus the maximum possible difference between the resistances of the lead wires.