Altek’s Model 211 RTD Calibrator lets you SIMULATE and READRTDs over the entire industrial temperature range. Use withtransmitters, recorders, controllers, alarms, indicators, dataacquisition and computer systems. Switch between four Platinum100, one Pt 1000, one Cu 10, two Ni RTD curves or OHMs rangesfrom 0.00 to 410.00 and 0.0 to 2010.0.
Field customize the Model 211 to lock-in 1° resolution, fixed° C or ° F or front selectable ° F/° C operation. Read and simulate2-Wire and automatically compensate for 3-Wire RTDs with builtin leads. A plug-in lead is supplied for 4-Wire RTD measurements.
The Model 211 turns on in the RTD type last used. Other RTDtypes may be selected each time the unit is turned on. If youalways use one RTD curve, lock-in the selected RTD type with theinternal DI P switch to prevent accidental change to an unwantedRTD type.
“SIMULATE” MODE ACTS LIKE AN RTD SENSOR:
Resolution is 0.1° over the full range for Platinum 100 ohm RTDsimulation, with 1 mA current supplied from the external device.Ohms range, at 1 mA current, provides 0.01 resolution from 0.00to 410.00 and autoranges to 0.1 resolution from 410.0 to 2010.0.(See graph for other excitation currents).
“QUIK-CHEK” function stores THREE output temperatures for realconvenience. The ALTEK Model 211 simulates key temperaturesfor repetitive calibrations. Turn the knob to check trip points, controller action or hysteresis. The fast response 211 sets quickly withoutovershoot. Memory is retained even when power is off.
The Model 211 has a unique circuit which lets you simulate RTD’swith most transmitters, recorders and other RTD inputs with fixed orintermittent excitation currents.
“READ” MODE MEASURES RTDs DIRECTLY:
The Model 211 display gives you fast, accurate temperaturemeasurement with 0.1 and 1 degree or with 0.01 and 0.1 ohmresolution. Two, three and four wire hookups assure accuracy inlong cable runs. Open RTDs and leads are detected and indicatedon the LCD display. Two readings per second track fast movingtemperatures.
“MAX” and “MIN” memories are continuously updated fromturn-on or whenever the “ RESET” button is pressed. Model 211gives you a handy tool to monitor temperatures for drift or controldeviation. Just flip the QUIK-CHEK switch to display the MlNimumand MAXimum temperature measured since reset.
Each time the Model 211 is turned on, the LCD displays allsegments for 1 second. It then displays the sensor material andAlpha (ohms at 100°C/ohms at 0°C) for the currently selectedRTD type for approximately 3 seconds. Any of 8 built-in RTD typesand alpha values plus ohms may be selected during the RTDturn-on mode.
Custom ranges for additional RTD types, Dew Cell or other resistivesensors are also available. The Metal, Base Resistance and Alphavalue for the custom RTD curve must be specified. Adding a customrange to a 211 may require removing one of the standard ranges.Unless otherwise specified the Ni 110 (Bristol 7 NA) will be replacedwith the custom range if necessary.