Altek 311A Manual

Universal RTD Calibrator
Model 311A
• Simulate RTDS into smart transmitters
Works with a wide variety of models including
Rosemount 3144 & Honeywell STT series
• Universal compatability with process
instruments
Operates with devices that use pulsed excitation
currents including PLCs, DCS and multi-channel
recorders
• Calibrate in °C & °F for your RTD type
Platinum 100Ω, copper 10Ω and 50Ω, nickel 110
and 120Ω
Simulate from 0.00 to 500.00 ohms
• Calibrate with laboratory accuracy
±(0.01% of reading + 0.075 ohms)
Accurate to ±0.2 °C (0.4 °F*) for Pt 100 Ohm RTDs
• Resolution to 0.1 °C or °F & 0.01 ohm
• Digital accuracy with analog simplicity
Speed sensitive digital pot for fast output
adjustment
• Use settable "Quik-Chek©"
Set any Span & Zero for instant recall
• Standard "AA" alkaline batteries
50 hours of constant operation
General description
Compatible with more instruments
The Model 311A has been designed to calibrate every
type of RTD monitoring and measuring device. The
enhanced circuitry of the 311A makes it compatible
with a wider variety of instruments than other RTD
calibrators.
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 programmable logic
controllers (PLCs), computers and digital control
systems.
The Model 311A is designed to work with these
devices and accepts intermittent current pulses as
short as 10 milliseconds. It calibrates devices with
excitation currents of as little as 0.090 mA and as high
as 10.20 mA
Simulate and read RTDs
Altek's Model 311A RTD Calibrator lets you
SIMULATE and READ RTDs over the entire industrial
temperature range. Switch between four platinum 100
ranges and two ranges each for copper and nickel.
Calibrate RTD instruments
Simulate RTD resistances into all types of measuring
instruments. The Altek Model 311A 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 for each RTD type with the
handy Quik-Chek switch. All output settings are
remembered, even with the power off.
Read RTD sensors
The Model 311A display gives you fast, accurate
temperature measurement with 0.1° and 1° or
resistance measurement to 500.00 ohms with 0.01Ω
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 311A 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.