Omega 450 - Manual

4 Specifications Display: Liquid crystal display, 7.6 mm (0.3 in.) digitHeight 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 minimumPlatinum RTD-500 hou...

7 Section 2 Operation 2.1 Principles of Operation The temperature indicator uses two ICs to digitizeand display the analog input signal. One IC performs the conversion of the analoginput to the digital equivalent via 24 bit delta-sigma analog to digital converter. Battery voltageis also monitored by...

9 the recesses or each corner of the case bottom. Step 2: Carefully pull the case halves straightapart so as not to damage the internal connectors. Step 3. Install the new battery. Close the case andreinstall the four screws.

12 450 SERIES OFF HOLD ON F . ON C . 1 0.1 F C F/CIndication DisplayValue ProbeInput Jack LowBatteryVoltageIndication To HoldDisplay Press andhold key toretain lastreading onthe display. Press thiskey toturn OFF Range Selector Press C or F keys toturn ON and/ortemperature scale Operation Features

14 Section 3 Calibration 3.1 Calibration Units with serial numbers beginning with theletter N use the calibration procedure outlinedbelow. Older units do not display versionnumbers and use the calibration procedureson page 19 . The calibration procedure should be performedby a qualified instrumentat...

15 with a minimum accuracy of ±0.1 degreeFahrenheit or ±0.2 degree Centigrade. Step 1. Ensure the unit is turned off. Connect theoutput of the thermocouple simulator to the input of the indicator using the appropriatethermocouple wire. Set the simulator output to 0 ° C Step 2. Locate the calibration...

18 10 2 5 1 63 8 9 47 GND Ref J +IN -1.23V +3.7V Ra Rc Rb Ra - Full Scale Adj. Rb Zero Adj. Rc +Full Scale Adj.

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 ...

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 i...

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 casefo...