Altek 211 Manual

RTD Calibrator
Model 211
• 8 RTD types & ohms
Select Pt, Cu, or Ni
• Temperature input & output
Directly in degrees
• 0.025% accuracy
Accurate to 0.25°F or 0.15°C
• 1° or 0.1° resolution
Field Selectable °F or °C
• "Quik-Chek™ " switch
Instantly recall three outputs; HI, LO & Set

General description

Altek's Model 211 RTD Calibrator lets you simulate
and read RTDs over the entire industrial temperature
range. Use with transmitters, single & dual channel
recorders, controllers, alarms and indicators. Switch
between four Pt 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 compen-
sate for 3-wire RTDs with built-in leads. A plug-in lead
is supplied for 4-wire RTD measurements. 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 DIP switch to prevent accidental
change to an unwanted RTD type.
Simulate an RTD sensor
Resolution is 0.1° C or F simulating the full range of
Pt 100 ohm RTDs into devices supplying a continuous
excitation current of 0.09 to 1.1 mA. From 1.1 to 5.800
mA continuous excitation current the 111 resolution
automatically adjusts to 1° C or F. Ohms range pro-
vides 0.01 ohm resolution from 0.00 to 410.00 ohms
which automactically switches to 0.1 ohm resolution
for continuous excitation currents above 1.1 mA.
Instantly recall three output temperatures
"QUIK-CHEK" function stores three output tempera-
tures for real convenience. The Model 211 simulates
key temperatures for repetitive calibrations. Turn the
knob to check trip points, controller action or
hysteresis. The fast response 211 sets quickly without
overshoot. Memory is retained even when power is
off.
Measure RTDs sensors
The Model 211 display gives you fast, accurate tem-
perature 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 short or long cable runs.
Open RTDs and leads are detected and indicated on
the LCD display. Two readings per second track fast
moving temperatures.
Recall maximum and minimum 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 minimum and
maximum temperature measured since reset.
Calibrating additional instruments
For multichannel recorders, data acquisition, computer
systems and smart transmitters Altek recommends
using the Model 311A RTD Calibrator in place of the
211. The Model 311A is designed to operate with
many devices that use pulsed or intermittent excitation
currents to read an RTD.