Measures to 400AAC.

• Current range: 1A to 400A rms.
• Accuracy: ±1.5%rdg + 1dgt.
• Maximum conductor size:
  0.91 inches (23mm).

Displays pressure in microns in steps of 1 micron. Has pump down indication showing progress from atmospheric pressure.

• Range: 50 to 2000 microns of mercury.
• Resolution: 1 micron of mercury.
• Pump down indication: when pumping down from atmospheric pressure to 2000 microns, output of head goes from over 3VDC to 2VDC.
• Straight-in access to sensor for easy cleaning.
• Fitting: 1/4" flared brass fitting (male)
• Accuracy (@~75ºF): ±10%, 0-1000 microns of mercury
• Auto-off can be disabled for data logging.
• "T" for inline vacuum testing.

For air temperatures, use the ARH4 or the AAV3. When it's not practical to touch the test point (e.g. a ceiling vent), use the ATIR3 infrared head. Infrared is not recommended for pipe temperatures. For comparing temperatures (two temperatures at once) use the ATH4 with any k-type thermocouple with the small industry standard fork.

Measures air velocity. Use to estimate CFM. Does not replace a hood for precision CFM measurements.

Air velocity:

• Fft/min, meters/sec, MPH, KM/hr.
• Range: 80 to 5900 ft./min.
• Accuracy: +/-3%fs+1dgt.

Temperature

• Displays ºF and ºC.
• Range: -4ºF to 140 ºF.
• Accuracy: +/-1ºF from 32ºF to 113ºF.
• Resolution: 0.5ºF.

Max operating temp: 120ºF.
Output: 1mV/unit of measure
(1mV/100ft/min above 2000 fpm).

Measures air temperature and RH% and displays wet bulb and dew point.

• +/-1ºF 32ºF-113ºF.
• +/-2.5% RH, 10% to 90%RH @ 77ºF.
• SelectºF or ºC.
• Auto-off can be disabled for
  data logging.

Two k-type thermocouple inputs. Display T1, T2, or T1-T2.

• Field calibration for ±1ºF accuracy.
• Displays ºF directly at 0.1ºF resolution on DMM with 0.1mVDC resolution.
• Select ºF or ºC.
• Converts from -50ºF to 1800ºF (optional thermocouple required)
• Includes two “wrap tab” thermocouples plus velcro straps. Thermocouples insulated to 400ºF.
• Auto-off can be disabled for data logging.

• Measures temperature without contact.
• 8:1 field of view.
• Laser sight included.
• Select ºF or ºC.
• Operating ambient temp: 32ºF to 122ºF at <75%RH.
• Temperature measurement range: 0ºF to 752ºF.
• Accuracy: Whichever is greater. At 73ºF ± 10ºF at <90%RH
  ±2.0%rdg or 4ºF, 32ºF to 160ºF
  ±3.0%rdg or 5.5ºF, 0ºF to 31ºF,
  161ºF to 752ºF.

To check levels of carbon monoxide use the ACM3. An AMN2 manometer can be used to ensure you have proper gas line and manifold pressure. An AUA2 can ensure that the flame diode circuit is functioning properly and not causing the furnace to "lock-out". The AOX2 accessory head measures %O2 of flue gas. It also displays %CO2. The ADMN2 is a dual port manometer, which allows the user to measure pressure drop. Use the ADMN2 to make sure the conditioned space has a positive pressure, keeping combustion products out.

Measures CO in air and finds CO sources.

• Fast enough to locate CO source in
  “walk-around” test.
• Three pin sensor for better performance.
• Long battery life.
• Optional Pump (ACMP3).
• Auto-off can be disabled for data logging.
• Select averaging or normal for smoothing or fast response to change.
• Range: 0 to 1000PPM (2000PPM with
  5 minute max exposure time).
• Initial accuracy: 0-15ppm ±5% reading
  ±1 ppm after zeroing;15-35ppm ±5% reading ±2 ppm after zeroing;
  0-1000ppm ±5% reading ±5 ppm
  after zeroing.
• Response time: <70sec to 90% of reading.
• Operating temperature: 32 to 105 ºF.
• Sensor type: Electrochemical (specific to CO).

ACMP3
Pump

Measures gas pressure and has resolution low enough for static pressure.

• Maximum 20" WC (water column) for gas pressure.
• 0.01" WC resolution for static pressure.
• Manual zero-set for comparing two pressures.
• Includes tube and adapter for gas pressure measurement.
• Auto-off can be disabled for data logging.

The ADMN2 is a dual port manometer accessory head that measures differential, absolute, and static pressure.

• Range from -60.0"WC to 60.0"WC.
• Accuracy of ±1.5% FS.
• Resolution down to 0.01"WC for static pressure measurements.

The AOX2 is a flue gas measurement accessory head. Find flue gas temperature, %CO2, %O2 for two fuel types.

• Includes high-temperature K-type thermocouple and pump with an inline water trap and filter.
• Fuel types: Gas and Oil
• Range: 0 to 25(%CO2, %O2), -58°F to 1000°F (temp)
• Resolution: 0.1(%CO2, %O2) and 0.1°(temp)
• Accuracy (CO2, O2): ±0.3%
• Accuracy (temp): ±0.6%+3°F (1.7°C) after field calibration

Click here to download the Combustion Efficiency Worksheet which works with the AOX2.

Measures milliamps and microamps for flame diode test. Measures 4 to 20mA control circuits.

• Includes flame diode adapter kit (AQK3).
• Resolution: 0.1 for meters with 0.1mVDC.
• Accuracy:
  DC: ±(1.0%rdg + 1dgt)
  AC: ±(1.5% + 2dgts).
• Max current: 200mA
  AC or DC.

Most non-electrical HVAC/R problems are charge related. Many systems in operation are undercharged or overcharged. This can cause decreased efficiency and compressor failure. The higher the efficiency of a system, the more critical it is that it is charged properly.

Measures refrigerant pressure and temperature and calculates superheat for two refrigerants in English or metric units.

• Display pressure in PSI or kPa.
• Display temperature in ºF or ºC.
• Display superheat in ºF or ºC.
• Select R22 or R410A.
• Auto-off can be disabled for data logging.

NEW FEATURES

• Includes "T".
• Now accepts K-type thermocouples. ATC1 included.
• LED indicates when readings are stable.
• Thermocouple calibration pot.
• Atmosphere pressure calibration.

ATC1

Measures refrigerant pressure and temperature and calculates superheat or subcooling for R22 and R410A in English or metric units.

• Display pressure in PSI or kPa.
• Display temperature in ºF or ºC.
• Display superheat in ºF or ºC.
• Display subcooling in ºF or ºC.
• Select R22 or R410A.
• Auto-off can be disabled for data logging.

NEW FEATURES

• Includes "T".
• Now accepts K-type thermocouples. ATC1 included.
• LED indicates when readings are stable.
• Thermocouple calibration pot.
• Atmosphere pressure calibration.

ATC1

Measures refrigerant pressure and temperature and calculates superheat or subcooling for R134A and R404A in English or metric units.

• Display pressure in PSI or kPa.
• Display temperature in ºF or ºC.
• Display superheat in ºF or ºC.
• Display subcooling in ºF or ºC.
• Select R134A or R404A..
• Auto-off can be disabled for data logging.

NEW FEATURES

• Includes "T".
• Now accepts K-type thermocouples. ATC1 included.
• LED indicates when readings are stable.
• Thermocouple calibration pot.
• Atmosphere pressure calibration.

ATC1

Tests high voltage diodes commonly found to fail in microwave ovens. Diode test on DMM cannot test high voltage diodes.

• Contains 9V battery to test high voltage diodes.
• Identifies opens, shorts, and correct voltage drop.

Records voltage using DL2 data logger or EHDL1 handle.

• Accuracy: DC: ±(0.5%rdg +
  1 dgt); AC: ±(1.0%rdg + 4 dgts).
• Max voltage: 600V AC or DC.
• Input impedance: 1MOhm.
• Standard test leads plug in top.

Connect to any digital multimeter with industry standard jacks to measure AC or DC current up to 600A. Reads amps directly on any Fieldpiece meter so there’s no need to mentally move decimal points.

• DCA accuracy: +/-(2%rdg+2A).
• ACA accuracy@60Hz, <400A:
  +/-(2%rdg+2A).
• ACA accuracy@60Hz, >400A:
  +/-(6%rdg+2A).
• Jaw opening: 30mm.