1. Introduction
Thank you for choosing the VOLTCRAFT CO-700 Carbon Monoxide Meter. This device is designed for measuring carbon monoxide (CO) concentrations in the air, providing both acoustic and optical alerts when CO levels rise. Please read this manual thoroughly before operation to ensure safe and correct use of the product.
2. Safety Information
Important Safety Instructions:
- This device is an instrument for measuring CO levels and is not a personal safety device or a substitute for a certified CO alarm system.
- Do not use the device in environments with explosive gases or vapors.
- Ensure proper ventilation when testing for CO.
- Keep the device away from water and high humidity.
- Do not attempt to repair or modify the device. Refer all servicing to qualified personnel.
- Dispose of batteries according to local regulations.

Image: Back view of the CO-700 meter with the battery compartment open, revealing a 9V battery and a warning label stating "WARNING: THIS IS NOT A PERSONAL SAFETY DEVICE."
3. Package Contents
Verify that all items are present and undamaged upon unpacking:
- VOLTCRAFT CO-700 Carbon Monoxide Meter
- Protective carrying case
- User Manual (this document)
- Note: Batteries are not included and must be purchased separately.

Image: The black protective carrying case for the CO-700 meter.
4. Product Overview
The VOLTCRAFT CO-700 is a handheld carbon monoxide meter featuring a clear display and intuitive controls.

Image: Front view of the CO-700 meter, highlighting the LCD screen, control buttons (MODE, SEL), and the power button.
4.1. Device Components
- LCD Display: Shows CO concentration in ppm.
- MODE Button: Used to cycle through display modes or settings.
- SEL Button: Used to select options or confirm settings.
- Power Button (AUTO POWER OFF): Turns the device on/off and activates/deactivates auto power off function.
- CO Sensor: Located at the top of the device.
- Speaker: For acoustic alerts.
5. Setup
5.1. Battery Installation
- Locate the battery compartment on the back of the device.
- Open the battery compartment cover.
- Insert a new 9V battery, observing the correct polarity (+/-).
- Close the battery compartment cover securely.
The device requires a 9V battery for operation. Ensure the battery is correctly installed before first use.
6. Operating Instructions
6.1. Powering On/Off
- To turn on: Press and hold the Power button until the display illuminates.
- To turn off: Press and hold the Power button until the display turns off.
6.2. Measurement
After powering on, the device will perform a brief warm-up (approximately 2 seconds). Once ready, it will display the current CO concentration in parts per million (ppm).
- Measurement Range: 0 to 1000 ppm.
- Warm-up Time: Approximately 2 seconds.
6.3. Alarms and Indicators
The CO-700 provides both acoustic and optical alerts for increasing carbon monoxide concentrations.
- Acoustic Alarm: The sound signal operates similarly to a Geiger counter. As CO concentration increases, the intervals between beeps shorten.
- Continuous Alarm: At concentrations above 200 ppm, a continuous sound signal will activate. Further increases in CO concentration are indicated by an increase in the tone's pitch.
- Optical Alarm: Visual indicators (e.g., LED lights, display warnings) will also activate in conjunction with acoustic alarms.
6.4. Auto Power Off
The device features an auto power off function to conserve battery life. This function can typically be enabled or disabled by a short press of the power button after turning the device on, or through menu settings if available (refer to specific device instructions for details).
7. Maintenance
7.1. Cleaning
- Wipe the device with a soft, dry cloth.
- Do not use abrasive cleaners or solvents.
7.2. Storage
- Store the device in its protective carrying case when not in use.
- Remove the battery if the device will not be used for an extended period to prevent leakage.
- Store in a cool, dry place, away from direct sunlight and extreme temperatures.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Dead or incorrectly installed battery. | Check battery polarity, replace with a new 9V battery. |
| Inaccurate readings. | Sensor obstruction or contamination; device malfunction. | Ensure sensor area is clear. If problem persists, contact support. |
| Alarm sounds continuously at low CO levels. | High ambient CO level; device malfunction. | Ventilate the area. If alarm persists in fresh air, contact support. |
9. Specifications
| Feature | Detail |
|---|---|
| Model | CO-700 |
| CO Measurement Range | 0 to 1000 ppm |
| Warm-up Time | Approx. 2 seconds |
| Power Source | 9V Battery (not included) |
| Dimensions (L x W x H) | 16.6 x 6.3 x 4.2 cm (6.5 x 2.5 x 1.7 inches) |
| Weight | 230 grams (approx. 0.5 lbs) |
| Alarms | Acoustic and Optical |
10. Warranty and Support
VOLTCRAFT products are built to high-quality standards. For warranty information and technical support, please refer to the official VOLTCRAFT website or contact your local distributor.
- Spare Parts Availability: 1 Year (as per product specifications).
For further assistance, please visit the VOLTCRAFT official website.





