Instruction/ maintenance manual of the product 450 Omega Engineering
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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.
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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……….
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 .
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.
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 .
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.
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.
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.
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.
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.
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.
11 Step 5: Observe and or record the temperature value. Step 6: Turn instrument off by pressing the OFF key..
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.
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.
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.
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.
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.
17 calibration procedure, set simulator at .2 ° C instead of 0 ° C. Repeat the calibration procedure again. Step 6. Verify calibration once finished.
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..
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.
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.
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.
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.
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.
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.
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.
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.
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.
TEMPERA TURE Thermocouple, R TD & Thermistor Probes, Connectors, Panels & Assemblies W ire: Thermocouple, R TD & Thermistor Calibrators & Ice Point References .
An important point after buying a device Omega Engineering 450 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Omega Engineering 450 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Omega Engineering 450 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Omega Engineering 450 you will learn all the available features of the product, as well as information on its operation. The information that you get Omega Engineering 450 will certainly help you make a decision on the purchase.
If you already are a holder of Omega Engineering 450, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Omega Engineering 450.
However, one of the most important roles played by the user manual is to help in solving problems with Omega Engineering 450. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Omega Engineering 450 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
