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Omega Engineering 450 - page 1
www .omega.com e-mail: info@omega.com U ser ’ s Guide 450 SERIES Digital Thermometers Shop online at MADE IN TEMPERA TURE INDICA TOR HOLD ON ° F 1 ° 0.1 ° OFF ON ° C 305.4 ° F THERMOCOUPLE THERMOMETER TYPE E 450 AET ® ...
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Omega Engineering 450 - page 2
Ser vicing Nor th America: USA: One Omega Drive, Box 4047 ISO 9001 Stamfor d CT 06907-0047 Cer tified T el: (203) 359-1660 F AX: (203) 359-7700 e-mail: info@omega.com Canada: 976 Ber gar Laval (Quebec) H7L 5A1, Canada T el: (514) 856-6928 F AX: (514) 856-6886 e-mail: info@omega.ca For immediate technical or application assistance: USA and Sales Ser ...
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Omega Engineering 450 - page 3
Benelux: Postbus 8034, 1 180 LA Amstelveen The Netherlands T el: +31 (0)20 3472121 F AX: +31 (0)20 6434643 T oll Free in Benelux: 0800 0993344 e-mail: sales@omegaeng.nl Czech Republic: Frystatska 184, 733 01 Karvina ´, Czech Republic T el: +420 (0)59 631 1899 F AX: +420 (0)59 63 1111 4 T oll Free: 0800-1-66342 e-mail: info@omegashop.cz France: 1 1 ...
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Omega Engineering 450 - page 4
Table of Contents Section 1: Description 1.1 General Description…………… 2 1.2 Physical Description…………... 3 1.3 Unpacking……………………… 3 1.4 Specification…………………… 4 Section 2: Operation 2.1 Principles of Operation………... 7 2.2 Power…………………………… 8 2.3 Operation……………… ...
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Omega Engineering 450 - page 5
2 Section 1 Description 1.1 General Description Your hand-held, battery operated digital temperature indicator is configured for compatibility with one of five temperature transducers, J,K,E,T RTD and Thermister . Each of the configurations linearizes the analog output from the transducer to produce a stable and accurate digital temperature display ...
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Omega Engineering 450 - page 6
3 1.2 Physical Description The indicator measures 45 mm (1.8 inches) in Height, 85 mm (3.3 inches) in width, and 145 mm (5.7 inches) in length. Weight is 230 grams (8.0 ounces). The case is constructed of high impact plastic. 1.3 Unpacking The indicator is supplied with the battery installed. A quick electrical test should be performed to verify th ...
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Omega Engineering 450 - page 7
4 Specifications Display: Liquid crystal display, 7.6 mm (0.3 in.) digit Height Operating temperature: 0 to 50 ° C (32 to 122 ° F) 0 to 75% Relative Humidity Storage Temperature: -20 to 70 ° C (-4 to 158 ° F) Battery: NEDA 1604, 9 Volt Battery Life: Thermocouple-2000 hours minimum Platinum RTD-500 hours minimum Thermistor- 1200 hours minimum NM ...
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Omega Engineering 450 - page 8
5 Maximum Common Mode Voltage: 1000VAC(RMS), ± 2000V Peak Accuracy at 22 ° C (72 ° F) 1 ° range: ± 0.8 ° C ± 0.1% rdg ± 1.5 ° F ± 0.1% rdg 0.1 ° range: ± 0.25 ° C ± 0.1% rdg ± .45 ° F ± 0.1% rdg Stability with time: 90 days: add ± 0.05% rdg. 1 year: add ± 0.1% rdg. Stability with temperature: Thermocouple: zero: ± 0.03 ° C/ ° ...
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Omega Engineering 450 - page 9
6 450 Range Table Type K Type J Type E Type T 1 0.1 1 0.1 1 0.1 -189 C to +1372 C -308 F to +2501 F -139.8 C to +203.7 C -219.7 F to +398.7 F -194 C to +1200 C -318 F to +2192 F -117.4 C to +203.5 C -179.4 F to +398.7 F -212 C to +1000 C -351 F to +1832 F -137.2 C to +203.5 C -215.0 F to +398.4 F -217 C to +400 C -360 F to +752 F -148.2 C to +203.9 ...
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Omega Engineering 450 - page 10
7 Section 2 Operation 2.1 Principles of Operation The temperature indicator uses two ICs to digitize and display the analog input signal. One IC performs the conversion of the analog input to the digital equivalent via 24 bit delta- sigma analog to digital converter. Battery voltage is also monitored by this IC and a thermistor supplies the referen ...
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Omega Engineering 450 - page 11
8 2.2 Power When battery voltage reaches about 6 volts, the display will exhibit a flashing: “LOW BAT” indication. A minimum of 20 hours of operation time remains upon initial appearance of the “LOW BAT” indication. When the battery voltage drops below 5 volts, an overload indications of three columns of dashes will appear on the display in ...
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Omega Engineering 450 - page 12
9 the recesses or each corner of the case bottom. Step 2: Carefully pull the case halves straight apart so as not to damage the internal connectors. Step 3. Install the new battery. Close the case and reinstall the four screws. ...
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Omega Engineering 450 - page 13
10 2.3 Operation Step 1: Insert temperature sensor plug into the indicator input jack. Failure to insert a probe results in a overload condition of three columns of dashes showing on the display. Step 2: Turn the indicator ON by pressing the ° F or ° C key. The display can be switched to read the temperature in degrees Celsius or Fahrenheit witho ...
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Omega Engineering 450 - page 14
11 Step 5: Observe and or record the temperature value. Step 6: Turn instrument off by pressing the OFF key. ...
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Omega Engineering 450 - page 15
12 450 SERIES OFF HOLD ON F . ON C . 1 0.1 F C F/C Indication Display Value Probe Input Jack Low Battery Voltage Indication To Hold Display Press and hold key to retain last reading on the display. Press this key to turn OFF Range Selector Press C or F keys to turn ON and/or temperature scale Operation Features ...
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Omega Engineering 450 - page 16
13 2.4 Maintenance Normal maintenance of the indicator consists of occasional cleaning with a soft, damp cloth, replacement of the battery as required, and calibration as outlined in Section 3. ...
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Omega Engineering 450 - page 17
14 Section 3 Calibration 3.1 Calibration Units with serial numbers beginning with the letter N use the calibration procedure outlined below. Older units do not display version numbers and use the calibration procedures on page 19 . The calibration procedure should be performed by a qualified instrumentation service technician. The indicator may be ...
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Omega Engineering 450 - page 18
15 with a minimum accuracy of ±0.1 degree Fahrenheit or ±0.2 degree Centigrade. Step 1. Ensure the unit is turned off. Connect the output of the thermocouple simulator to the input of the indicator using the appropriate thermocouple wire. Set the simulator output to 0 ° C Step 2. Locate the calibration switch on the back of the case labeled “Z ...
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Omega Engineering 450 - page 19
16 NOTE: If you want to cancel the calibration mode press OFF button in front of the unit. For T/C type K set simulator @ 1320 ° C J set simulator @ 960 ° C T set simulator @ 350 ° C E set simulator @ 950 ° C Press the switch one more time and wait for a few seconds until display switches to 0.0 set simulator to 0 ° C. Press switch one more ti ...
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Omega Engineering 450 - page 20
17 calibration procedure, set simulator at .2 ° C instead of 0 ° C. Repeat the calibration procedure again. Step 6. Verify calibration once finished. ...
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Omega Engineering 450 - page 21
18 10 2 5 1 6 3 8 9 4 7 GND Ref J +IN -1.23V +3.7V Ra Rc Rb Ra - Full Scale Adj. Rb Zero Adj. Rc +Full Scale Adj. ...
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Omega Engineering 450 - page 22
19 Calibration- Thermocouple Type K, J and T and E Equipment List • 4 ½ digit voltmeter • Voltage Calibrator: Resolution, 1uV; accuracy ± 0.01% ( ± 2uV) • Ice Bath, 0.00 ° C ± 0.05 ° C • Jumper lead terminated in mini-clips For optimum results, the calibration should be performed with an ambient temperature from 20 ° 24 ° C (68 ° t ...
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Omega Engineering 450 - page 23
20 c. Remove the bottom case of the indicator. d. Adjust the voltage calibrator for an output of 0.000mV and connect the minus lead from the calibrator to “GND” and the positive lead from the calibrator to “;+IN”, on the indicator printed circuit board. e. Disable the reference junction by jumpering together the “REF J” and “GND” te ...
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Omega Engineering 450 - page 24
21 polrity). j. The voltage measured at the “3.7V” test- point should be 3.007 times larger than the voltage measured at the “-1.23V” test- point. Adjust Rc (which varies the +3.7V line to attain the proper ratio. k. Switch the indicator to the 1 ° range. l. Adjust the voltage calibrator for an output of +53.782mV for type K; +57.942mV for ...
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Omega Engineering 450 - page 25
22 Calibration- Thermistor Type Equipment List • 4 ½ digit voltmeter • Precision decade box: Resolution, 0.01 ohm ; accuracy ± 0.02% • Ice Bath, 0.00 ° C ± 0.05 ° C • Electro Scientific Industries DB-62 or equivalent a. Turn the indicator ON by pressing the ° C key. b. Remove the bottom case of the indicator. c. Connect a precision re ...
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Omega Engineering 450 - page 26
23 at the “-1.23V” testpoint: disregarding polarity indication, record the voltage. f. Move the DVM HI lead to the “3.7V” testpoint and record the voltage (disregard polarity). g. The voltage m easured at the “3.7V” test- point should be 3.007 times larger than the voltage measured at the “-1.23V” test- point. Adjust Rc (which varie ...
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Omega Engineering 450 - page 27
24 Calibration- Platinum RTD Equipment List • 4 ½ digit voltmeter • Precision decade box: • Resolution, 0.01 ohm ; accuracy ± 0.02% • Ice Bath, 0.00 ° C ± 0.05 ° C • Electro Scientific Industries DB-62 or equivalent a. Turn the indicator ON by pressing the ° C key. b. Remove the bottom case of the indicator. c. Connect a precision r ...
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Omega Engineering 450 - page 28
25 e. Move the DVM HI lead to the “3.7V” testpoint and record the voltage (disregard polrity). f. The voltage measured at the “3.7V” test- point should be 3.007 times larger than the voltage measured at the “-1.23V” test- point. Adjust Rc (which varies the +3.7V line to attain the proper ratio. g. Adjust Rb for an indicator display of 3 ...
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Omega Engineering 450 - page 29
26 Zero Calibration a. Turn the indicator on by pressing the ° C key. b. Set the indicator to the 0.1 ° range. c. Connect the ice bath probe to the indicator Input jack. d. Place the probe in a stable ice bath (0.00C ± 0.05 ° C and adjust the ZERO pot (Rb) located beneath the plug on the rear case for an indicator display of 0.0 ° C. e. Replac ...
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Omega Engineering 450 - page 30
W ARRANTY / 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 ’ s W arranty 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 custo ...
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Omega Engineering 450 - page 31
TEMPERA TURE Thermocouple, R TD & Thermistor Probes, Connectors, Panels & Assemblies W ire: Thermocouple, R TD & Thermistor Calibrators & Ice Point References Recorders, Contr ollers & Process Monitors Infrared Pyr ometers PRESSURE, STRAIN AND FORCE T ransducers & Strain Gages ...
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