• Duty cycle (% pulse width modulation) for measuring modulating gas valves
• Low pass filter for noisy environments
• Separate fuse (2) and battery compartment
• IR serial interface that can be used to input data to PC with optional A183
• High resolution (0.01) low DC microamp range for measuring flame safety control circuit
• Frequency, capacitance, temperature, data hold, min/max record, relative mode
• AC/DC volts, AC/DC amps, resistance, audible continuity and diode test
• 4,000 count
• True RMS for more accurate measurements
• Auto/manual ranging
• Temperature measurement
• Duty cycle to measure the amount of time the motor is on
• Low pass filter for noisy environments
• Separate fuse (2) and battery compartment
• IR serial interface
• cULus 61010-1
• CAT II - 1000V, CAT III - 600V

The 183A comes complete with the following accessories:

• 183A Instrument
• Zippered Vinyl Carrying Case
• Rubber Boot
• Test Lead Set
• Instruction Manual

Model 183A Applications

• Test run and start capacitors
• Measure ambient and duct temp
• Test control (thermostat, thermocouple, flame safety) and line voltages
• Measure resistance and test for continuity
• Line current up to 10amps (in series)

Category Ratings:

• Category I: Usually electronic equipment or equipment where measures have been taken to limit transient over voltages.


• Category II: Single phase loads like appliance personal computers, television sets, and other household loads. Outlets located more than 30 feet froma CAT III source or more than 60 feet from a CAT IV source.


• Category III: Distribution level fixed installations like distribution panel devices, short branch and feeder circuits, three phase loads, and single phase commercial lighting.


• Category IV: Equipment and lines located on the power line side of a service panel or where a low voltage connection is made to utility power