Specification. Radiamatic Detectors and Accessories

Transcription

1 4/92 Page 1 of 8 Radiamatic Detectors and Accessories Specification Function The Radiamatic temperature detector generates an emf proportional to the temperature of the object sighted. It is used with potentiometric instruments to record, indicate or control the temperature. Description Metal case with corrosion resistant finish. Gasketed metal cover shields terminals from dust and contaminants (on all models except Miniature). Rigid binding posts connect 12 ga. or smaller copper lead wires to instrument. Mounting attachments available to provide easy means of mounting unit. Available in five models: General Purpose, High Speed, Small Target, Low Range and Miniature. When selecting the Radiamatic detector best suited for an application it is necessary to consider: 1. Target temperature and the temperature of surrounding objects. 2. Target size. 3. Target distance from detector lens. 4. Target emittance and reflectance. 5. Type of enclosure the heated object is in and, if in the open, the percentage of heat emitted in such an application. 6. Sighting path taking into consideration any vapors or gases. 7. Sighting angle if a non-blackbody application. Lens Lens materials are Pyrex, fused silica and calcium fluoride. Threaded flanges at the lens and on the optical diaphragm inside the housing prevent reflections and marginal rays from reaching the thermopile. Lenses withstand external pressures of 10 psi. A wide variety of lens angles are available. Thermopile The thermopile is a radial assembly of minute thermocouples wired in series. Radiant energy is focused directly on the thermocouple hot junctions for highest sensitivity. The portion of the thermopile that is exposed to the radiant source is blackened to increase absorption of energy. Figure 1 General purpose or high speed Radiamatic models Figure 2 Small target Radiamatic detector Figure 3 Miniature Radiamatic (Part No )

2 s Page 2 Ambient Temperature Compensating Coil Automatic compensation is provided for ambient temperatures up to 121 C (250 F), Specifications Type General Purpose High Speed Small Target Miniature Calibration Factory calibrated so that units can be interchanged as in thermocouple installations. Temperature Range 260 to 1870 C 500 to 3400 F Response to 98% Temperature Change (seconds) Wave Length Sensitivity in Microns to 2.7 with Pyrex lens. 0.3 to 3.8 with Fused Silica lens. 0.3 to 10 with Calcium Fluoride lens. Temperature/emf relationship is approximately onethird that of the General Purpose models. 580 to 1870 C 1000 to 3400 F to 2.7 with Pyrex lens. 0.3 to 3.8 with Fused Silica lens. Established in the field. When fixed for one point, measurements will be correct over entire range. 925 to 3870 C 1700 to 7000 F 0.3 to 3.8 with Fused Silica lens. Same as Small Target models. 260 to 1760 C 500 to 3200 F to 10 with Calcium Fluoride lens. Physical Lens Material Pyrex, Fused Silica or Calcium Fluoride Pyrex or Fused Silica Fused Silica Calcium Fluoride Dimensions Diameter Millimeters Inches Length Millimeters Inches Minimum Target Diameter Millimeters Inches

3 Page 3 Sighting Path and Field of View General Purpose and High Speed Models Narrow-angle Radiamatic detectors General Purpose and High Speed wide-angle Radiamatic detectors Small Target Models Models and Models and Models and Models and Models and Miniature Model

4 Page 4 TABLE 1 TARGET DATA FOR MINIATURE MODEL Minimum Target Target Distance Diameter mm in. mm in TABLE 2 GENERAL PURPOSE AND HIGH SPEED DETECTORS Minimum Target Diameter Model Numbers Distance , Between -2,-3,-4,-5,-6 Lens and , ,-8 Target -2, -4, , mm in. mm in. mm in * * TABLE 3 SMALL TARGET DETECTORS Minimum Target Diameter Model Numbers Distance Between Lens & Target mm in mm in. mm in. mm in. mm in. mm in TABLE 4 EXPECTED MILLIVOLT OUTPUT UNDER BLACKBODY 1.31 CONDITIONS FOR SMALL TARGET DETECTORS 1.63 Temperature Approximate Milivolt Output for Model Numbers C F , , * * *For each additional 305 mm (.12") to distance add to diameter , -4,-5, -8, -9, -1O NOTE: For Temperature-Millivolt equivalents for all Radiamatic Detectors, see publication This may be purchased from Honeywell, Fort Washington, PA. Application Data The following should be completed for all detectors: 1 Target temperature, normal operating temperature, low and high limits. 2 Minimum target size and distance from lens. 3 Target material and emittance. 4 Angle of observation of emitted radiation. 5 Is target stationary or moving? If moving, at what speed? 6 Atmospheric conditions between target and detector. 7 Ambient temperature. 8 Can Radiamatic unit sight directly on target or must it sight through a sealed auxiliary window, such as required for vacuum or pressure furnace? If known, give material and thickness of window. 9 Briefly describe mechanical details of application. 10 Type of chart and scale desired, if available. Is scale calibrated for detector or evenly divided? If a calibrated chart is not available, and one is requested, do you wish to have a special chart made to meet your requirements? 11 Type of instruments desired.

5 Page 5 Ordering Information Please specify: Select Radiamatic detector Model Number from Table 5. Mounting accessories required, select part numbers from the next three pages. TABLE 5 RADIAMATIC DETECTOR MODELS Model Number Without With Minimum Target Rear Rear Diameter Temperature Range* Calibration Sighting Sighting Lens Lens mm in Degrees C Degrees F Lens Material Type Wave Length Sensitivity in Microns General Purpose Detectors RL Calcium-Fluoride 0.3 to 10.0 Rl Fused Silica 0.3 to 3.8 RH Pyrex 0.3 to 2.7 RH Pyrex 0.3 to 2.7 High Speed Detectors RIF RHF Fused Silica 0.3 to Pyrex 0.3 to 2.7 RHWF Pyrex 0.3 to 2.7 Small Target Detectors Fused Silica Rl-1 Rl RI RI RI to 3.8 Miniature Detector RL Calcium Fluoride 0.3 to 10.0 *These temperature limits are given only as a guide. Temperature ranges not included within these limits may be used. Narrow-Angle Models Wide-Angle Models.

6 Page 6 Radiamatic Accessories These accessories are standard units for use with open or closed ceramic or metal tubes and are all of gas-tight construction for use around explosive or combustible atmospheres, or in processes under pressure. All accessories have fully machined surfaces and are supplied with metallic gaskets. Male and female flange designs assure positive alignment. Fittings with machined seats are used for attachment to other accessories, or for attachment directly to threaded tube and flange assemblies. All such fittings are furnished with bolts for attaching to adjacent fitting and copper gasket for gas tightness Fittings with a spherical seat should be used only next to a silicon carbide tube and clamp assembly (Part No or ). All other accessory fittings are joined by flat (or machined) seats. All piping and conduit connections have 1/2- inch standard pipe thread. Support Fitting and Pipe Clamp Consists of a flange with an extension lug which attaches to the adjustable clamp. Supports the Radiamatic unit and accessories and/or connects a ceramic tube and the Radiamatic unit. Easily attached to pipe stand, furnace tie rod, etc. Specify: No , with flat seats or No , with one spherical and one flat seat. A 1-1/4 inch adjustable pipe clamp is included with each unit. Part No Air-Cooled Fitting A tubular extension having cooling fins on the outside and baffles inside. Cooling by convection, or purging, or both. Purging with either air or a suitable gas which is deflected away from the lens. A 1/2-inch standard pipe thread is for connection to purge lines. Specify: No , with flat seats; No , with one spherical and one flat seat. Part No Water-Cooled Fitting Used only in combination with the aircooled fitting and/or safety shutter interposed between it and the Radiamatic unit. This is essentially a water-cooled flange. Two 1/2-inch standard pipe size connections for attachment to water supply and drain lines. Specify: No , with flat seats; No , with one spherical and one flat seat. Part No Vertical Roof Support Consists of two cast flanges attached to each other by three tie rods. Both flanges have holes cast through their center to accommodate the sighting or target tube. Specify: No Part No

7 Page 7 Radiamatic Accessories Safety Shutter A fully automatic device to protect lens against flame impingement. Consists of pressure-tight housing containing a spring shutter held out of line of sight by a fusible link. If damaging flame conditions develop, the fusible link melts and shutter closes. A manually operated gate between the Mounting Accessories for Miniature Radiamatic Unit Plate Adaptor Steel ring which attaches directly to shoulder of housing. Adaptor permits the use of Support Fitting for supporting Miniature Head and for attaching standard Honeywell accessories. Specify: No automatic gate and furnace is normally held out of the line of sight. When automatic safety shutter closes, normal operations can be resumed by: (A) closing the manual gate; (B) replacing burned-out fuse; (C) re-opening manual gate. Specify: No Support Handle Aluminum mounting bracket with flange which attaches directly to shoulder of housing. Requires no Adaptor. Support Handle is used like Support Fitting Has extension 1/2-inch diameter lug and can be mounted in standard laboratory-type clamps. Specify: No Auxiliary Sighting Lens Lens is in focus with thermopile and provides a convenient means of inspecting the image of both thermopile and target. Inspection is made by raising metal cover outside of terminal compartment. When lens is not being used, a self-closing cover keeps radiant energy from reaching thermopile from the rear. To order Rear Sighting Lens for General Purpose, High Speed and Small Target Models, select model number from Table on page 5. Metal Tubes Heat and corrosion-resistant alloy tubes and mounting flanges with closed end (target tube) or open end (sighting tube) when measured temperatures do not exceed 1150 C (2100 F). Eight standard lengths. See Table below. All metal tubes have machined and threaded flanges to insure correct alignment. Inconel Sighting and Target Tubes Part Number Length I.D. O.D. Net Weight Shipping Weight Open End Closed End mm inches mm inches mm inches kg Ibs. kg Ibs * Available only with wide angle Radiamatic detector.

8 Page 8 Silicon Carbide Sighting and Target Tubes Excellent thermal properties, assuring maximum response to temperature changes. For service where furnace temperature does not exceed 1650 C (3000 F). Supplied as either open end (sighting) or closed end (target) tubes. A tube clamp assembly is used to attach accessories to collar of the tube. Permits installation of the Radiamatic unit after ceramic tube is mounted in the furnace wall. A spherical seat assures correct alignment Silicon Carbide Sighting and Target Tubes Part Number Length I.D. O.D. Weight Open End Closed End mm inches mm inches mm inches kg Ibs Sillramic Target Tubes Developed for use on heat-treating furnaces and salt baths. Sillramic is a closegrained vitrified refractory material which is highly resistant to both thermal shock and penetration by furnace gases up to 1595 C (2900 F) for vertical or supported installations, 1480 C (2700 F) for unsupported installations. The extension tube is a separate assembly consisting of a threaded extension tube and a mounting flange. The target tube is a separately replaceable assembly comprised of a Sillramic tube cemented in a threaded metal ferrule. Maximum distance from Radiamatic lens to the target must not exceed 760 mm (30 ). Closed End Sillramic Target Tubes with Threaded Metal Ferrule Part Length I.D. O.D. Net Weight Shipping Weight Number mm inches mm inches mm inches kg lbs. kg Ibs Threaded Carbon Steel Extension Tubes with Mounting Flange Specifications are subject to change without notice.