OMEGA HH504 Digital Thermometer
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INTRODUCTION This instrument is a 4½ digit, compact-sized portable digital thermometer designed to use external 100W Platinum RTD as temperature sensor. Temperature indication follows Reference Temperature/Resistance Tables (Pt385 for European Curve, Alpha=.00385 and Pt3926 for American Curve, Alpha=.003926). SAFETY INFORMATION It is recommended that you read the safety and operation instructions before using the thermometer.
SPECIFICATIONS ELECTRICAL Temperature Scale: Celsius or Fahrenheit user-selectable. Measurement Range: Pt385(100W ) -200°C to 800°C, (-328°F to 1472°F) Pt3926(100W ) -200°C to 630°C, (-328°F to 1166°F) Resolution: 0.1°C or 0.2°F Accuracy: Accuracy is specified for operating temperatures over the range of 18°C to 28°C (64°F to 82°F), for 1 year, not including RTD probe error. ±(0.05% rdg + 0.2°C) on °C scale ±(0.05% rdg + 0.4°F) on °F scale Temperature Coefficient: 0.
ENVIRONMENTAL Ambient Operating Ranges: 0°C to 50°C (32°F to 122°F) <80% R.H. Storage Temperature: -20°C to 60°C (-4°F to 140°F) <70% R.H. GENERAL Display: 4½ digit liquid crystal display (LCD) with maximum reading of 19999. Overload: "----.-" is display. Battery: Standard 9V battery. Battery Life: 100 hours typical. Auto power off: The meter key switch inactive for more than 30 minutes, press power key to resume operation. Dimensions: 192mm(H) x 91mm(W) x 52.5mm(D). Weight: 365g.
OPERATING INSTRUCTIONS 1 Power Switch The key turns the thermometer on or off. In the data SET mode, can not power off, must leave data SET mode then power off. 2 °C/°F Selecting the Temperature Scale (Main display) Reading the main displayed in either degrees Celsius(°C) or degrees Fahrenheit(°F). When the thermometer is turned on, it is set to the temperature scale that was in use when the thermometer was last turned off. To change the temperature scale, press the °C/°F key.
4 T1/ T2/T1-T2 Main display Input Selection The input selection indicates which input is selected for main display; T1 probe, T2 probe or the difference between the two probes (T1-T2), when the thermometer is turned on, it is set to T1. When main display input selected T1, then T1 input can select alternate of probe by pressing Pt385/Pt3926 key switch.
The true average of all the reading taken over at least 22 hours preiod can be displayed. If 22 hours is exceeded, new averages are no longer calculated. The last calcalated value is retained as the average reading, but the actual minimum and maximum reading will continue to be captured. In the this mode, press HOLD key to stop the recording of readings, all values are frozen, press again to restart recording.
8 °C/°F Selecting the Temperature Scale (Second display) Readings the second displayed in either degrees Celsius(°C) or degrees Fahrenheit(°F). When the thermometer is turned on, it is set to the temperature scale that was in use when the thermometer was last turned off. To change the temperature scale, press the °C/°F key. 9 SET mode (Relative value set, Time set and Hi/Lo Limits value set) 1.
4. When the thermometer is turned on. The Relative set value and Hi/Lo Limits set value that was in use when thermometer was last turned off set values. 10 T1/T2 /T1-T2 second display Input Selection The input selection indicates which input is selected for second display; T1 probe, T2 probe or the difference between the two probes (T1-T2), when the thermometer is turn on, it is set to T2 input can select alternate of probe by second display Pt385/Pt3926 key switch.
OPERATOR MAINTENANCE WARNING To avoid possible electrical shock, disconnect the thermocouple connectors from the rmometer before removing the cover. Battery Replacement Power is supplied by a 9 volt "transistor" battery. The " " appears on the LCD display when replacement is needed. To replace the battery, remove the two screws from the back of the meter and lift off the battery cover. Remove the battery from battery contacts.
TEMPERATURE VS RESISTANCE TABLE(ITS90) °C Pt385 Pt3926 -200°C 18.521W 16.996W -100°C 60.256W 59.479W 0°C 100.000W 100.000W 100°C 138.505W 139.272W 200°C 175.856W 177.362W 300°C 212.052W 214.275W 400°C 247.092W 250.018W 500°C 280.977W 284.591W 600°C 313.708W 317.994W 700°C 345.280W - 800°C 375.
HH 504 / HH 505 CALIBRATION PROCEDURE Note: The following calibration procedure should perform only by qualified technicians who have access to the items as following. Equipment: The class of calibrator had better 10 times greater than the measured meter. 1. Turn off the meter then set the adjusted jumper to J1. 2. Insert the 383.00Ω calibrator to the T1 then turn on the meter, the main display reading reads 1830.0 then press " ENTER " key. 3. The second display is stabilized (about 5sec.
WARRANTY / DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA Warranty adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA's customers receive maximum coverage on each product.If the unit should malfunction, it must be returned to the factory for evaluation.
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