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8 RTD TYPES & OHMS
Select Pt, Cu, or Ni
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TEMPERATURE INPUT & OUTPUT
Directly in degrees
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“QUIK CHEK® ” SWITCH
Three Points, HI, LO, & Set
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0.025% ACCURACY,1° OR 0.1° RESOLUTION
Field Selectable °F or °C
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THREE YEAR WARRANTY
Toolbox tough
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CUSTOM RANGES AVAILABLE
Overview
Altek’s Model 211 RTD Calibrator lets you SIMULATE and READ RTDs over the entire industrial temperature range. Use with transmitters, recorders, controllers, alarms, indicators, data acquisition and computer systems. Switch between four Platinum 100, one Pt 1000, one Cu 10, two Ni RTD curves or OHMs ranges from 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 simulate 2-Wire and automatically compensate for 3-Wire RTDs with built- in leads. A plug-in lead is supplied for 4-Wire RTD measurements.
The Model 211 turns on in the RTD type last used. Other RTD types may be selected each time the unit is turned on. If you always use one RTD curve, lock-in the selected RTD type with the internal DI P switch to prevent accidental change to an unwanted RTD type.
“SIMULATE” MODE ACTS LIKE AN RTD SENSOR
Resolution is 0.1° over the full range for Platinum 100 ohm RTD simulation, with 1 mA current supplied from the external device. Ohms range, at 1 mA current, provides 0.01 resolution from 0.00 to 410.00 and autoranges to 0.1 resolution from 410.0 to 2010.0.
“QUIK-CHEK” function stores THREE output temperatures for real convenience. The ALTEK Model 211 simulates key temperatures for repetitive calibrations. Turn the knob to check trip points, control- ler action or hysteresis. The fast response 211 sets quickly without overshoot. Memory is retained even when power is off.
The Model 211 has a unique circuit which lets you simulate RTD’s with most transmitters, recorders and other RTD inputs with fixed or intermittent excitation currents.
“READ” MODE MEASURES RTDs DIRECTLY
The Model 211 display gives you fast, accurate temperature measurement with 0.1 and 1 degree or with 0.01 and 0.1 ohm resolution. Two, three and four wire hookups assure accuracy in long cable runs. Open RTDs and leads are detected and indicated on the LCD display. Two readings per second track fast moving temperatures.
“MAX” and “MIN” memories are continuously updated from turn-on or whenever the “ RESET” button is pressed. Model 211 gives you a handy tool to monitor temperatures for drift or control deviation. Just flip the QUIK-CHEK switch to display the MlNimum and MAXimum temperature measured since reset.
TURN-ON SEQUENCE
Each time the Model 211 is turned on, the LCD displays all segments for 1 second. It then displays the sensor material and Alpha (ohms at 100°C/ohms at 0°C) for the currently selected RTD type for approximately 3 seconds. Any of 8 built-in RTD types and alpha values plus ohms may be selected during the RTD turn-on mode.
CUSTOM RANGES
Custom ranges for additional RTD types, Dew Cell or other resistive sensors are also available. The Metal, Base Resistance and Alpha value for the custom RTD curve must be specified. Adding a custom range to a 211 may require removing one of the standard ranges. Unless otherwise specified the Ni 110 (Bristol 7 NA) will be replaced with the custom range if necessary.