Differential Pressure Gauge 12 Units High Accuracy LCD Screen Digital Manometer for HVAC System Item Type: Differential Pressure Gauge Material: ABS Battery: 9V battery x 1 (not included) Battery Model: 6F22 Measurement Range: 0 to ±10KPa, 0 to 40.15inH20 Resolution: 1Pa, 0.01KPa, 0.01inH20 Accuracy: ±0.03KPa (0 to 0.30Kpa) ±0.05KPa (0.31 to 0.1Kpa) ±(1.5% reading + 0.01Kpa) other ranges ±0.01inH20 (0 to 0.12inH20) ±0.02inH20 (0.13 to 0.40inH20) ±(1.5% reading + 0.04inH20) other ranges Maximum Pressure Limit: 10KPa (exceeding the range will damage the instrument) Repeatability: ±0.25%FS Measurement Response Time: About 0.5 seconds (25℃±2℃) Pressure Connection: 1/8in (3.18mm) quick connector Operating Temperature: 0℃ to 40℃ Storage Temperature Range: -10℃ to 60℃ Overrange Indication: HI (stop using if this indication appears, as it will damage the instrument) Operating Instructions: 1. Press the Settings Menu key to enter the system menu. 2. View Data: Press the Confirm key to enter, use the up and down keys to view the recorded data during measurement, and press the Back key to exit. 3. Overlimit Setting: e this function, first press the Confirm key in the Overlimit Switch section, then set it to On. After the screen displays Setting Successful, use the up and down keys to set the overlimit values in the upper or lower limit of the data. Press the Confirm button to exit after setting. During measurement, if the measured data exceeds the set overlimit value, the LCD screen of the instrument will flash as a reminder. 4. Time Setting: The instrument starts with a default time of 00:00:00 (hour: minute: second). Press the Confirm key to enter. In the time setting, you can set it to the current time. Note: This time setting is only a one time setting after startup and does not have a clock saving function. The time will reset to zero when the instrument is restarted. 5. Language Selection: Press the Confirm key to enter. You can switch between Chinese and English language systems according to your needs. 6. Auto Power Off: Press the Confirm key to enter. You can choose between 5 minutes, 10 minutes, no power off as needed. Selecting No Power Off means manual shutdown or shutdown due to battery depletion. 7. Air Density Setting: Press the Confirm key to enter, press the up and down buttons to adjust the setting parameters, long press the return button to switch density units (Kg/m³ or lb/ft3). After setting, short press the confirm key to exit. 8. Recover Factory Values: Press the Confirm key to enter, select Yes, and the instrument will undergo a initialization. Top my conversation, making it convenient to quickly save and search for content, images, and video links for bookmarking.