Digital Single Manifold Gauge SMG-1H are professionally digital gauges used for maintaining, monitoring and evacuating refrigeration systems and charging refrigerants. The gauges can measure system pressure and display various parameters such as the evaporation temperature of the corresponding refrigerant. They have a backlight, auto-off, unit switch, over-range alarm, and other functions.

Key Feature:

• Professional Design: 2-Way Air conditioning diagnostic manifold gauge set for R134A R12 R22 and R410A refrigerants. Designed for AC charging, diagnostic check and recovery work.
• Easy to use: Double pressure test, dual temperature test, digital readout, multi-unit switching, multi-mode function and built-in refrigerant database.
• High Accuracy: High-quality dual-table valve with the imported pressure sensor, excellent workmanship, stable performance, Large screen, display data clearly.
• Long battery life: Powered by 3AAA batteries, up to work for about 6 months.
• Wide Application: The intelligent electronic refrigerant group instrument is an auxiliary instrument for the installation, testing and maintenance of refrigeration equipment such as air conditioners, fridge and cold storage. 24/7 US Technician Support via Email and Phone.
• Service 1-year warranty. 30 days free & easy return 

User Manual

Specifications

• Six units switchable: MPa, kPa, bar, psi, kg/cm², cmHg
• Pressure measuring range: -0.100 ~ 5.515MPa (-14.5-800 psi)
• Resolution: 0.5psi
• Accuracy: +0.5%FS
• Sampling Rate: 1s
• Temperature Unit: °C/°F
• Battery: 3 AAA batteries
• Battery Life: 6 months

Note:

• When pressure is over measuring range: -OL- shows, backlight flashes, and ALM symbol lights.
• Please use the ZERO button to zero the gauge before connecting it to the system.
• The AUTO symbol will show on the screen if the Auto OFF function is enabled.

LCD Screen& Blue Backlight Display

• The pressure gauge's digital backlight display allows you to readout easily even in the night.
• Partition display for different measurements, direct readings for all measurements.
• Adjustable backlight off time: 3s,4s,5s,10s,15s or always on
• Selectable auto off time: 10min (default), 20min,30min,40min or disable

Operation

• Backlight: When the gauge is ON, press the power button to light up the backlight.
• Max/Min Memory and Clear: Light up backlight and press power button to display MAX symbol & value, then hold ZERO button until 8888 shows on screen, to clear current Max value.
• When backlight is on, press power button twice to display MIN symbol & value, then hold ZERO button until 8888 shows on screen to clear the current Min value.
• Temperature Unit: Press and hold SET button until AUTO shows on screen. press power button once until C-F shows, then use SET or ZERO button to switch between ℃ and ℉.
• Pressure Unit: Press and hold SET button until AUTO shows on screen. press power button twice until UNIT shows, then use SET or ZERO button to switch between pressure units.

Compatible Refrigerants

• R114, R12, R123, R1234yf, R1234ze, R124, R125,
• R13, R134a, R14, R141B, R142B, R143A, R152A,
• R161, 170, R21, R218, R22, R23, R290, R32, R290,
• R32, R401A, R401B, R401C, R402A, R409B, R41,
• R410A, R410B, R412A, R413A, R414A, R414B, R415B,
• R416A, R417A, R419A, R420A, R421A, R421B, R422A,
• R422B, R422C, R422D, R423A, R427A, R437A, R441A,
• R442A, R443A, R444A, R449A, R449B, R450A, R452A,
• R455A, R50, R500, R502, R503, R504, R507, 508A,R508B,
• R509A, R513A, R600, R600a, R601, R601a, R740, R744

Connecting to an A/C System