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Omega Model CYD201/202 User’s Manual

2-4 Installation

2.3.2

Model CYD202S Definitions

The Model CYD202S has one front panel control. The Sensor A/Sensor B

switch selects which sensor data to display. Both sensors must conform to

the same temperature response curve. The 4-digit red LED displays the

selected temperature in Kelvin (K) or degrees Celsius (°C).

CYD202S Temperature Monitor

CYD202S Temperature Monitor

K

K

Sensor A

Sensor A

Sensor B

Sensor B

Omega

Omega

C-200-2-3.eps

Figure 2-3. Model CYD202S Front Panel

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Содержание CYD201A Series

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Страница 3: ...ions 2 8 2 4 1 Two Lead Measurement Considerations 2 8 2 4 2 Connecting Leads To The Sensor 2 8 2 4 3 Sensor Mounting 2 9 2 4 4 Current Source Dependence 2 10 2 4 5 Measurement Errors Due To AC Noise 2 11 2 5 Sensor Curve Definition 2 12 2 6 Power Connections 2 12 2 7 Panel Mounting 2 13 2 8 Initial Setup and Checkout Procedure 2 13 3 OPERATION 3 1 3 0 General 3 1 3 1 Temperature Unit Selection 3 ...

Страница 4: ...l CYD201 Rear Panel 2 3 2 3 Model CYD202S Front Panel 2 4 2 4 Model CYD202S Rear Panel 2 5 2 5 Model CYD202D Front Panel 2 6 2 6 Model CYD202D Rear Panel 2 7 4 1 Location of Fuse and Jumpers 4 2 LIST OF TABLES Table No Title Page 1 1 Specifications 1 4 2 1 Effect of Current Variation on Diode Temperature 2 10 2 2 Typical CY7 dV dI Values for Selected Temps 2 11 A 1 CY7 Diode Standard Curve A 1 ...

Страница 5: ...02 Temperature Monitors are a microcontroller based instrument which measures temperature It is designed to use CY7 Silicon diode sensors The Model CYD201 displays the temperature reading of one diode sensor The Model CYD202S has two inputs and one display The user selects the input to display by means of a front panel switch The diode sensors must conform to the same temperature response curve Th...

Страница 6: ...compensation These units excite the diode sensor with a 10 µA current source An analog to digital converter reads the sensor voltage and sends the reading to a microcontroller The microcontroller uses the selected temperature response curve stored in memory to convert sensor voltage to temperature The computed temperature displays on the bright front panel LED display There are several standard te...

Страница 7: ...itor CYD202S Temperature Monitor K K Sensor A Sensor A Sensor B Sensor B C C CYD202D Temperature Monitor CYD202D Temperature Monitor K K Channel A Channel B Channel B Model Model CYD201 CYD201 Model Model CYD202S CYD202S Model Model CYD202D CYD202D Omega Omega Omega Omega Omega Omega C 200 1 1 eps Figure 1 1 Temperature Monitor Series ...

Страница 8: ...Digit Red LED Display 14 2 mm 0 56 in high and unit annunciators Resolution 0 1 K or C Units K or C Update Rate 3 updates per second REAR PANEL CONNECTORS AND SWITCHES Sensor Input Screw terminal Power Input Power jack accepts power plug compatible to Switchcraft S 760 or S 765 or screw terminal Configuration Switch 4 position DIP Switch to Select Curve and Temperature Unit GENERAL Ambient Tempera...

Страница 9: ...entory all components supplied before discarding any shipping materials If there is freight damage to the instrument file proper claims promptly with the carrier and insurance company and notify Omega Engineering Notify Omega immediately of any missing parts Omega cannot be responsible for any missing parts unless notified within 60 days of shipment 2 2 REPACKAGING FOR SHIPMENT To return the unit ...

Страница 10: ...sists of the 24 Volt power input connector DIP Switch CAL trimpot and screw terminal connector See Figure 2 2 24 Volt Power Input Connector The line cord from the wall mounted power supply has a power plug that inserts into the Model CYD201 rear panel The Model CYD201 is off when not plugged in and on when plugged in Make sensor connections before applying power to the instrument DIP Switch The DI...

Страница 11: ...efer to Paragraph 4 4 for details Shield also terminates the diode sensor cable shield Finally the power for multiple units can be ganged together to a common on off switch using the Optional Power input which is the first two inputs on the screw terminal connector This is an input only and can not be used as a voltage tap POWER POWER 24 24 CAL CAL 24 24 POWER POWER OPTIONAL OPTIONAL SHIELD SHIELD...

Страница 12: ... switch selects which sensor data to display Both sensors must conform to the same temperature response curve The 4 digit red LED displays the selected temperature in Kelvin K or degrees Celsius C CYD202S Temperature Monitor CYD202S Temperature Monitor K K Sensor A Sensor A Sensor B Sensor B Omega Omega C 200 2 3 eps Figure 2 3 Model CYD202S Front Panel ...

Страница 13: ...s to Sensor B The front panel switch selects between the two sensors Both sensors must conform to the same temperature response curve selected by the CURVE 1 and CURVE 0 DIP switches There is only one POWER connector and DIP Switch refer to Paragraph 2 3 1 POWER 24 24 CAL 24 POWER OPTIONAL VREF SHIELD SHIELD N C N C N C Sensor A Sensor B Sensor B K C K C CURVE 1 CURVE 0 CURVE 0 1 1 2 2 3 3 4 4 OPE...

Страница 14: ...ontrols Two 4 digit red LEDs simultaneously display temperatures in Kelvin K or degrees Celsius C In essence the Model CYD202D operates as two independent units with a common power supply C C CYD202D Temperature Monitor CYD202D Temperature Monitor K Channel A Channel B Omega C 200 2 5 eps Figure 2 5 Model CYD202D Front Panel ...

Страница 15: ...lies to Channel A The lower set applies to Channel B The unit simultaneously displays the temperatures of both sensors There is only one POWER connector CAL CAL VREF VREF SHIELD SHIELD POWER POWER 24 24 CAL CAL 24 24 POWER POWER OPTIONAL OPTIONAL VREF VREF SHIELD SHIELD N C N C N C N C Channel A Channel A Channel B Channel B K C K C CURVE 1 CURVE 1 CURVE 0 CURVE 0 1 1 2 2 3 3 4 4 OPEN OPEN K C K C...

Страница 16: ...er foot is preferred to minimize heat flow Consequently a voltage drop within the leads may exist Expect some loss in accuracy since the voltage measured at the voltmeter is the sum of the sensor voltage and the voltage drop across the connecting leads The exact measurement error depends on sensor sensitivity and variations resulting from changing temperature For example a 10 Ω lead resistance res...

Страница 17: ...r layer The base is electrically isolated from the sensing element and leads make all thermal contact to the sensor through the base A thin braze joint around the sides of the SD package electrically connect to the sensing element Avoid contact to the sides with any electrically conductive material When installing the sensor make sure there are no electrical shorts or current leakage paths between...

Страница 18: ...rward current voltage characteristic Consequently the forward voltage variation with changing current for diodes is smaller than for resistance temperature sensors which have linear current voltage characteristics Below 30 K the sensitivity dV dT of Omega Engineering diode temperature sensors increases by an order of magnitude over sensitivities at higher temperatures The slope dV dI of the I V cu...

Страница 19: ...e below 1 Place a capacitor across the diode to shunt induced AC currents Capacitor size depends on the noise frequency If noise is related to power line frequency use a 10 microfarad capacitor If AC coupled digital noise is suspected digital circuits or interfaces use a 0 1 to 1 microfarad capacitor In either case if measured DC voltage increases there is induced noise in the measurement system 2...

Страница 20: ...4 1 2 1 0 0 8 0 6 0 4 0 2 0 20 60 200 300 Temperature K kelvin Standard Curve 10 10 0 20 30 40 50 60 Average Slope 26 mV K Average Slope 2 3 mV K 2 6 POWER CONNECTIONS The Model 200 accepts a broad power supply AC or DC voltage range from any polarity power supply If the Model CYD201 is ordered with a wall mount power supply a 24 Volt AC power supply is included The line cord from the wall mounted...

Страница 21: ... Model CYD201 requires a 24 Volt input CAUTION Connect temperature sensor s to unit rear before applying power Sensor damage may occur if connected with power on 2 Install temperature sensor s per recommendations in Paragraph 2 4 Route wiring to Model CYD201 3 Connect power plug to 24 Volt receptacle at unit rear then plug wall mounted power supply into power connection 4 Upon power up the unit di...

Страница 22: ...Omega Model CYD201 202 User s Manual 2 14 Installation This Page Intentionally Left Blank ...

Страница 23: ... of the switch open to select Kelvin K C K C CURVE 1 CURVE 1 CURVE 0 1 2 3 4 OPEN 3 2 DIODE CURVE SELECTION Sensor curves available with the Model CYD201 is Curve 10 The diode curve selected by the position of the two DIP Switches labeled CURVE 1 and CURVE 0 on the rear panel Depress the top portion of the switch to select closed and the bottom portion of the switch to select open CURVE 1 CURVE 0 ...

Страница 24: ...sor B switch is used to select which of two sensors temperature data is displayed Both sensors must conform to the same diode curve The 4 digit red LED displays the selected temperature in Kelvin K or degrees Celsius C See Figure 2 3 The Model CYD202D has no front panel controls Two 4 digit red LEDs simultaneously display temperatures in Kelvin K or degrees Celsius C In essence the unit operates a...

Страница 25: ...or connection is loose polarity backward or not connected or SHORT wiring is shorted at some point between unit and sensor 4 2 Operating Software Replacement The microprocessor IC U10 contains the Model CYD201 operating software See Item 10 in Figure 4 1 Use the following procedure to replace the operating software IC CAUTION To avoid damaging the unit disconnect unit from power supply before perf...

Страница 26: ...Omega Model CYD201 202 User s Manual 4 2 Service U10 C9 TP1 TP2 F1 R14 J1 J3 C4 J2 J4 S1 Pin 1 C 200 4 1 eps Figure 4 1 Location of Fuse and Jumpers ...

Страница 27: ...ion for Model CYD200 S only 5 Connector J4 Screw terminal connector 6 Trimpot R14 Calibration trimpot Accessible from rear panel 7 DIP Switch S1 Accessible from rear panel Selects temperature units and curve settings The fourth switch is not used 8 Connector J2 Power jack used to connect an external 24 Volt power supply 9 Connector J1 2 pin jumper connection for Model CYD200 D only 10 Fuse F1 200 ...

Страница 28: ...Omega Model CYD201 202 User s Manual 4 4 Service This Page Intentionally Left Blank ...

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Страница 30: ...Omega Model CYD201 202 User s Manual A 2 Curve Table This Page Intentionally Left Blank ...

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