USER MANUAL Heavy Duty Manifold Pressure Gauge Model HD780 Additional User Manual Translations available at www.extech.
Introduction Congratulations on your purchase of the Extech Instruments Heavy Duty Manifold and Pressure Gauge Model HD780. This device is a portable, digital refrigerant manifold meter that measures high pressure, Type K temperature and ambient temperature. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit our website (www.extech.
Meter Description 1. 2. Probe Connection LCD Display 3. 4. 5. 6. 7. 8. 9. 10. 11. / SET Button / UNITS Button ENTER Button °F / °C / Button P (P1, P2 selection) M (mode) Button MAX / MIN Button H (Hold) Button T (T1, T2 selection) / M (mode) Button POWER Button 1 2 3 4 6 7 8 5 9 10 11 RIGHT SIDE VIEW 1 1. 2. T2 Input DC 9V Power Adapter Input Socket 2 3 HD780‐en‐GB_V1.
LEFT SIDE VIEW 1. 2. 3. 1 2 T1 Input Ambient Temperature sensor Battery compartment (Back) 3 DISPLAY 1. P1, P2 and P1‐P2 Pressure 2. Pressure units 3. T1, T2, T1‐T2 Temperature 4. Hold icon 5. Setup icon 6. MAX/MIN/AVG indicators 7. Ambient Temperature 8. Auto power off symbol 9. Power adapter indicator 1 8 2 3 4 5 6 11 10 9 10. Low Battery Indicator 11. Offset 7 4 HD780‐en‐GB_V1.
Operation Button Descriptions MAX/MIN PM Power ON/OFF the meter Select MAX/MIN/AVG Toggle between P1 and P2 H Freeze the readings on the display TM Toggle between T1 and T2 (The middle display shows the temperature plus the offset.
Viewing MAX‐MIN‐AVG For a given measurement session, this meter can record the highest (MAX) and the lowest (MIN) readings for later recall. 1. Press the MAX‐MIN button to view the current MAX readings (MAX icon appears). The readings on the display are now the highest readings logged. 2. Press the MAX‐MIN button again to view the current MIN readings (MIN icon appears). The readings on the display are now the lowest readings logged. 3.
Battery Replacement WARNING: To avoid electrical shock, remove the test leads, disconnect the meter from any circuit and turn OFF the meter before opening the case. Do not operate with an open case. Battery Replacement When the low battery icon appears on the LCD, the batteries must be replaced. Several hours of accurate readings are still possible in this condition; however, batteries should be replaced as soon as possible: Remove the cover from the rear of the meter.
Specifications Function Range Pressure ‐14 to 0 psi Resolution 0.1 0 to 200 psi 0.1 (1.0 psi) 200 to 400 psi 0.1 (0.3% + 1psi) 400 to 500 psi 0.1 (0.3% + 1.5psi) ‐96 to 0 kPa 1 (2 kPa) ‐0 to 1378 kPa 1 (7 kPa) 1378 to 2757 kPa 1 (0.3% + 7 kPa) 2757 to 3447 kPa 1 (0.3% + 10 kPa) ‐0.96 to 0 bar 0.01 (0.02 bar) 0 to 13.79 bar 0.01 (0.1 bar) 13.79 to 34.47 bar 0.01 (0.3% + 0.1 bar) ‐28 to 0 inHg 0.1 (0.4 inHg) 0 to 407 inHg 0.1 (2 inHg) 407 to 814 inHg 0.
