Omega CL526 manual Tecnical unit, Decimal point position, International Temperature Scale, Rj mode

Page 26

9.3.3Tecnical unit

To change the technical unit from °C to °F (or viceversa) follow the procedure indicated below: Instrument operative in -Out- mode as follows:

Out

0.0°C TcK:

Switch the instrument -OFF-

Keep pressed the <SELECT> key and switch the instrument <ON> obtaining the following reading:

In

10.0°F TcK:

Use the same procedure to return in °C switching the instrument -Off-

Press the <SELECT> + <ON> key to read:

In

-12.0°C TcK:

9.3.4Decimal point position

The decimal point position, to increase or decrease the resolution upon the application, is made by pressing keys <!> or <">.

The instrument will automatically convert values in °C or °F from decimal to integer (and viceversa) when they are in the range limits stated in par. 1.2.1.

On mV or V mode one of the following decimal point positions can be obtained:

0.000 V

0.0mV

0.00mV

0.000 mV

Decimal conversion is not possible for the mA mode (always with three decimal points).

9.3.5International Temperature Scale

The memory of the instrument stores both linearisations of the old International Practical Temperature Scale of 1968 (IPTS68) and the new International Temperature Scale of 1990 (ITS90).

The active linearisation is indicated on the right side of the display as follows:

IPTS 68 IPTS 90

The change from one scale to the other is possible directly from the keyboard:

Press <SHIFT> + <ITS> keys

9.3.6Rj mode

The instrument can operate with an internal automatic cold junction (Rj) compensation or a remote programmable from - 50 to 100°C.

The active Rj compensation mode is indicated on the right side of the display as follows:

internal automatic

external programmable

To change the reference junction (Rj) compensation mode, press <SHIFT> + <Rj> keys.

9.3.7Convert function

The "convert" function allows readings of the electrical signal equivalent to the technical unit indication. Can be used in both -IN- or -OUT- mode for thermocouples, resistance thermometers and x scaling.

26

Image 26
Contents CL526 OMEGAnetSM On-Line Service Internet e-mail Info@omega.com Introductory Note Table of Contents Digital Interface General Performance Specifications Battery voltage Power supplyBattery life Dimensions 120x60x230 mm Weights net 1 KgTable of ranges and accuracy 32 to +302F ± 0.02% of rdg +0.18FGeneral Features Case Physical Description + 5 V for logic and analog circuits 5 V for analog circuits Power supplyFunctional Description Input circuit Digital display MicroprocessorFirmware Digital to analog converterBattery charger. Operation from line source Resistance and Rtd measurementsResistance and Rtd simulation Thermocouples input-output circuitUnpacking PRE-OPERATIONAL Check Out 1248.3C TcWiring practice Electrical ConnectionsThermocouple wires Examples of input /output wiring and connectionsLimit of Error of thermocouple wires ClassHow to maximize the battery life Power SupplyBattery Charger Battery Line OpOperating mode set up Power onBattery voltage indication Operation & Applications1032.2C TcK OUT mode selectionParameter or sensor selection Out 0.0C TcKTecnical unit International Temperature ScaleRj mode Decimal point positionIN-OUT data memories Data memory configurationAverage readings Data memory manual recall Data memory automatic scanningSimulation cycle selection Manual step advanceAutomatic simulation cycle End 100.0mV Time 0h 0m 50sStart 0.0mV 0mVRj compensation mode check Simulation cycleRJ 0.0C ext Mode Linear Mode SquareScale factor program ProgWord mbar Word psi Word hPaExternal Rj compensation Installation parameter procedureFirmware version code Serial number Digital Interface Digital interface data program modeDigital output wiring practice Baud RateComputer CL526 TTL to RS 232 adapterCommunication protocol from CL526 to a PC Instruct DataPage Ramp Computer request for CL526 settings = OHMInstr ModeDis/Lin STO 2 #D 127 202 Display Chksum = DATA1 + DATA2 + Data 3 + Data 4 .AND.7F Example B PC instructions to CL526 Communication programsExample a data transfer from CL526 to PC Example a3ØØ While LOC 1 = Ø Wend Faulty operating conditions MaintenanceSafety recommendations Error ChecksumProtection fuses StorageIndex WARRANTY/DISCLAIMER Temperature