TP carbon monoxide single gas monitor is used to measure CO in ambient air, with a range of 0-999 ppm display
The reading value increases by 1ppm, and when the factory set carbon monoxide concentration reaches 30ppm, an audible and visual alarm will be triggered, and specific regulations can be followed
Adjust the alarm value based on the value.

Other features:
The maximum reading value is locked, and after time and manual zeroing, the sound alarm can be turned on or off as needed.
The probe uses advanced electrochemical probes specifically for measuring CO and cannot be used for other purposes.
Attention: This instrument meets the requirements of BS 7967 and is calibrated every 12 months.
Technical specifications:

Size: 38.5mm × 152.0mm × 70.0mm (H × L × W)
Weight: 181.5g
Probe: Electrochemical type
Range: 0-999 ppm
Accuracy: ± 3ppm or 5% (whichever is greater)
Response time: 90% of readings (within 60 seconds)
Temperature: 0 ℃ -40 ℃
Battery: 2 × 1.5V alkaline AA
Working hours: up to 300 hours

on/off
Press the green power button to turn on the device, and all fields will display for approximately 2 seconds. The screen displays CO in ppm, along with the instrument
The stable reading of the meter quickly and automatically returns to zero, and the green power indicator light is on. To shut down, please press the power button to turn it on
Close twice.
Attention: Keep the instrument on in the external air environment.

mode
Press the MODE key to browse various functions: record maximum read value, elapsed time, alarm settings, sound
Alarm, CO display.
Record maximum read value: Display the maximum read value of CO after the self power is turned on.
Time elapsed: displays the time since startup in hours and minutes, with a maximum value of 99:59
Alarm setting: Display the sound and light alarm values set by the individual. The factory setting is 30ppm CO
Sound alarm: In this mode, the sound alarm can be turned on or off by pressing the SEL key.

Manual zeroing: The instrument automatically resets to zero when turned on. If it cannot be reset to zero, manual reset is required.
Press and hold the SEL key on the CO display screen for 2 seconds until a short beep sound is heard, and the screen will display
Show some changing symbols, and after 5 seconds, the instrument will return to zero and hear another beep sound.
Change alarm settings: The 770 factory setting is 30ppm alarm. After the instrument is turned off, press ON/OFF at the same time
Press the SEL button until "SET1" appears, then press the ON/OFF button to display the set value
The MODEL key can increase the reading, and the SEL key can decrease the reading. Pressing once can change the reading value by 1ppm
After setting, pressing the ON/OFF button will display "END" on the screen. Press the ON/OFF button again to return to the CO screen.

Other features:
When the sound alarm is turned off, the "double speaker" icon appears in the bottom left corner of the screen. When reporting
When the alarm setting is exceeded, the "warning" sign is displayed in the middle of the lower part of the screen, and the red warning indicator light is on.
When the battery voltage approaches 2V, the "BAT" symbol appears to warn that the battery is low. If the voltage enters one
Step down and the instrument will automatically shut down