GENERAL INFORMATION
ALTEK
UNIVERSAL RTD CALIBRATOR
MODEL 311
Simulate & Read RTDs
Altek’s Model 311 RTD Calibrator lets you
SIMULATE and READ RTD’s over the entire
industrial temperature range. Use with transmitters,
recorders controllers, alarms, indicators, data
acquisition and computer systems. Switch between
four platinum 100 ranges, one platinum 200 range,
one platinum 500 range and two platinum 1000
ranges. The Model 311 also has ranges for copper
and Nickel and can be supplied with custom RTD
ranges. When custom ranges are installed, one or
more of the standard ranges is deleted. Call the
factory for details.
Calibrate RTD Instruments
Simulate RTD resistances into all types of
measuring instruments. The Altek Model 311 takes
the place of bulky, expensive decade boxes and
temperature tables. Output directly in °C, °F or dial in
the resistance value in ohms.
QUIK-CHEK Outputs
Save time with every calibration by instantly
recalling three output settings with the handy QUIK-
CHEK switch. All output settings are remembered,
even with the power off.
Compatible With Modern Instruments
The Model 311 has been designed to calibrate a wide
variety of RTD devices, supporting devices with excitation
currents of as little as 0.090 mA and as high as 10.20 mA.
Some newer process control equipment use a pulsed
excitation current to measure RTD sensors. This includes
some smart transmitters, multi-channel recorders and
inputs to computers and digital control systems.
The Model 311 is designed to work with these devices
and accepts intermittent current pulses as short as 56
milliseconds.
Read RTD Sensors
The Model 311 display gives you fast, accurate
temperature measurement with 0.1° and 1° or resistance
measurement with 0.01
Ω
and 0.1
Ω
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 311 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.
ALTEK INDUSTRIES CORP
• CALIBRATE IN TEMPERATURE FOR YOUR RTD TYPE
Select Platinum 100, 200, 500 and 1000 Ohm
Copper 10 Ohm
Nickel 110 and 120 Ohm
• SIMULATE RTDS INTO PROCESS INSTRUMENTS
Operates with devices that use pulsed excitation currents
including Rosemount Smart Transmitters
• CALIBRATE WITH LABORATORY ACCURACY
±(0.01% of R 0.075 Ohms)
Accurate to ±0.2 °C (0.4 °F) for Pt 100 Ohm RTDs
• RESOLUTION TO 0.1 °C OR °F
• DIGITAL ACCURACY WITH ANALOG SIMPLICITY
Speed sensitive digital pot for fast output adjustment
• USER SETTABLE “QUIK-CHEKS
©
”
Set any Span & Zero for instant recall
• STANDARD “AA” ALKALINE BATTERIES
50 hours of constant operation
• THREE YEAR WARRANTY
Toolbox tough
• CUSTOM RANGES AVAILABLE
Additional RTD types, base resistances or Alpha values
