Altek 334A Manual

Loop Calibrator
Model 334A
• All milliamp loop functions
Source milliamps
Simulate two-wire transmitters
Read milliamp outputs
Power & measure two-wire transmitters
Read DC Volts to check power supplies
• Compact and lightweight
Easy to carry – less than a pound
Includes padded nylon carrying case with
shoulder strap and belt loop
• Accuracy to ±0.03%
Within ±0.02 mA from 4 to 20 mA
• Long lasting alkaline batteries
Three "9V" batteries last many shifts
Optional AC adaptor for bench use
• "Quik-Chek ® " Switch
Instantly output 4.00 and 20.00 mA
• Milliamp or % display
Source or Read from 0.00 to 24.00 mA or
from -25.0 to +125.0% of 4 to 20 mA
• Overload protected
Withstands 135 Volts AC/DC without fuses

General description

Easy to use
The Altek Model 334A will check, calibrate and
measure all your current signal instruments in a 4 to
20 milliamp DC loop. Use at every point in your loop.
Source & Read 0.00 to 24.00 mA, Simulate a 2-wire
transmitter or use the Model 334A to simultaneously
power & measure your 2-wire transmitters. Toggle the
display to show milliamps or percent of 4 to 20.
Source milliamps
Calibrate recorders, digital indicators, stroke valves or
any other instruments that get their input from a 4 to
20 mA loop. Easily set any value to within 0.01 mA
with the speed sensitive digital potentiometer.
Recall output setting
The "Quik-Chek" switch provides rapid checking of
4.00, 20.00 and a third point between 0.00 to 24.00
mA.
Calibrate using loop power
Check loop wiring and receivers by using the Model
334A in place of a 2-wire transmitter. Simulate a
changing process input to check loop response and
control settings. The Model 334A uses any loop power
from 3 to 45V DC.
Read loop current
Check controller outputs or measure the milliamp
signal anywhere in the loop. The Model 334A
measures 0.00 to 24.00 mA signals with much greater
accuracy than a typical multimeter. Toggle the display
to show milliamps or percent of 4 to 20.
Power and measure 2-wire transmitters
Simultaneously measure the output of a 2-wire
transmitter while using the internal batteries to supply
up to 27V DC to power the transmitter. Handy for
checking transmitters in the field or on the bench.
Read DC Volts
Measure from -99.99 to +99.99 VDC with 10mV
resolution. Use it to check loop power supplies, I/V
converters, 1 to 5 Volt signals and battery voltages.