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AMiR 7838 Infrared Measuring Heads
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Wide range of versions for applications in intelligent process control and monitoring systems,as well as in production and test lab.
AMiR 7838
Infrared Measuring Heads in Two-Wire Design Type

Technical Features:

Compact, robust and precise infrared measuring heads.
Wide range of versions for applications in intelligent process control and monitoring systems, as well as in production and test lab.
 Low cost standard version with fixed set temperature and output current range and emissivity can be manually set at the measuring head.
The standard version without programming functions is ideally suitable for connecting to ALMEMO® devices.
Measuring heads also available as addressable and remotely programmable versions.

Technical Data:
Accuracy: ±1% of meas. value or ±1.4°C, the higher value of either is always valid
Reproducibility: ±0.5% of meas. value or ±0.7°C, the higher value of either is always valid
Response time: 165ms, at 7838 - 51(P) 100ms
Nominal temperature: +23°C, ±5°C
Temperature resolution: AMiR 7838 -10, -11: 0.125°C, AMiR 7838 -21, -31, -41, -51: 1°C
Relative humidity: 10 to 95%, non-condensing, at 30°C max.
Power supply: 12-24VDC, for AMiR 7838xxP: 24VDC
Output signal: 4 … 20mA linear, two-wire technology
Emissivity: 0.10 to 1.00 manually adjustable at measuring head (only noprogrammable heads)
Operating temperature: without cooling: 0 to 70°C, with air cooling: 0 to 120°C
with water cooling: 0 to 175°C, with protective housing: 0 to 315°C
Protection system: IP 65, (IEC 529)
Shock: IEC 68-2-27 (MIL STD 810D), 50G, each axis, 11ms
Vibration: IEC 68-2-6 (MIL STD 810D), 3G, each axis, 11 to 200Hz
Dimensions: without water cooling housing: 187mm long, Ø 42mm
with water cooling housing: 187mm long, Ø 60mm
Weight: without water cooling housing: 330 g
with water cooling housing: 595 g

Device Functions:
only AMiR 7838-xxP (programmable AMiR Heads)
Programming: through PC via HART® adapter (OR7838SH)
Emissivity: 0.10 to 1.00 programmable
Data functions: max, min, average value hold, compensation of ambience radiation
Limit value programming: 1 limit value incl. hysteresis, also usable for monitoring the temperature of the measuring head
ALMEMO® application: For the measuring head versions, which cannot be addressed and remotely programmed, we recommend, for acquisition and storing the measured values, our panel meters ALMEMO® 4490-2 and the transmitter ALMEMO® 8990-1 with one measuring input. For several measuring heads our desktop data loggers ALMEMO® 3290-8 are suitable.


Types (incl. rigid mounting angle and fastening screw):
MR783810(P)  For universal applications, standard optics OR7838OS1 (Fresnel Lens)
Meas. range -18 to 500°C, spectral range 8 to 14 μm, response time 165ms, optical resolution 15:1
MR783811(P) For universal applications, standard optics OR7838OS3 (Amtir Lens)
Meas. range -18 to 500°C, spectral range 8 to 14 μm, response time 165ms, optical resolution 33:1
MR783821(P) For high temperature measurements in metal finishing and in rotary tubular kilns,
standard optics OR7838OS3 (Sapphire Lens)
Meas. range 200 to 1000°C, spectral range 3.9 μm, response time 165ms, optical resolution 33:1
MR783851(P) For maximum temperature measurements in metal finishing,
standard optics OR7838OS6 (Float Glass Lens)
Meas. range 500 to 2000°C, spectral range 2.2 μm, response time 100ms, optical resolution 60:1
MR783831(P) For high temperature measurements in glass production and at heating up and hardening,
standard optics OR7838OS3 (Calcium Fluoride Lens)
Meas. range 250 to 1650°C, spectral range 5.0 μm, response time 165ms, optical resolution 33:1
MR783841(P) For low temperature measurements in the production of plastic foils and normal foils,
standard optics OR7838OS3 (Calcium Fluoride Lens)
Meas. range 10 to 360°C, spectral range 7.9 μm, response time 165ms, optical resolution 33:1
(P) Measuring heads remotely programmable

Options:
OR7838IS Inherent safety (Eex in IIC T4), only available with programmable meas. heads without cooling jacket
OR7838KL Water/air cooling housing including air blow attachment, factory mounted
OR7838ZB Zener barrier including current supply
OR7800KZ1 Factory test certificate, based on DKD/NIST certified sensors
(only with delivery of new devices)

Accessories:
ZR7838SF for programmable measuring heads MR7838xP
Protective window, snap-on, according to above lens detail
OR7838SH Remote control set incl. HART adapter and software
ZR7838NT Industrial mains adapter 110/220V - 24VDC
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