Descripción
Comet U6841
- A solution for every need, every budget – economy and premium dataloggers
- High quality, accurate and stable sensors
- Built-in battery operated
- Built-in printer
Datalogger for 3 Current Inputs 0-20mA and 1 Two-state Input
Datalogger is designed to record 3 current inputs and 1 binary input. The recording is performed in non-volatile electronic memory. The data can be transferred to a PC via USB-C. In case of exceeded set limits alarms are indicated by LED, LCD, and acoustically by built-in beeper. The recorder includes a Traceable calibration certificate with declared metrological traceability of etalons is based on requirements of EN ISO/IEC 17025 standard.
Datalogger with 3 inputs 0 – 20 mA and 1 binary input
This model is used to measure up to three signals from current loops (0 to 20) mA DC while allowing one binary input to be monitored. The current inputs are passive and are not galvanically separated from one another. This means that the connected sensors cannot be powered by the current loop and the negative terminals («-«) are connected to each other. These facts must be taken into consideration when designing the device into the circuit. Incorrect connections may cause degradation of the measured values. Standard outputs (4 to 20) mA can also be measured with current inputs without any problems.
Connection Mode: For the procedure for connecting wires to the connecting block refer to Annex 4.
Binary input serves to monitor voltage signals or signals coming from a voltage-free contact. The binary input changes are registered immediately, irrespectively of the recording interval setting. To safe record the input status, the signal must be present for at least 1 s. This input can capture connected/disconnected voltage status. Input signals are connected to a connecting block. The device’s ingress protection is IP 20. Due to its low ingress protection, the device is not suitable for using in dusty rooms or rooms exposed to water ingress. The maximum length of the input wires should not exceed 30 m. It is recommended to use shielded cables. The battery in the device cannot be charged.
Manufacturer Specs
| CURRENT INPUT | |
| Measuring range | 0 to 20 mA DC |
| Resolution | better than 1 µA |
| Accuracy | ±20 µA |
| Input resistance | approx. 100 Ω |
| Minimum current | 0 mA (open circuit) |
| Maximum current | limited to approx. 40 mA |
| BINARY INPUT | |
| Parameters of the voltage contact | «L» level input voltage:< 0,8 V(*); «H» level input voltage:> 2 V; Minimum voltage applicable:0 V; Maximum voltage applicable:+30 V DC |
| Parameters of the voltage-free contact | Contact resistance in «switched-on» state:< 10 kOhm; Contact resistance in the «switched-off» state:> 2 MOhm; Contact voltage in the «switchedoff» state:ca 3 V; Minimum state duration necessary for latching the state:1s |
| GENERAL TECHNICAL DATA | |
| Operating temperature | -20 to +60 °C |
| Channels | 3x current input, 1x binary input |
| Memory | 500,000 values in noncyclic logging mode; 350,000 values in cyclic record mode |
| Recording interval | adjustable from 1 s to 24 h |
| Display and alarm refresh | adjustable 1 s, 10 s, 1 min |
| Recording mode | noncyclic – data logging stops after filling the memory cyclic – after filling memory oldest data is overwritten by new |
| Real time clock year, leap | year, month, day, hour, minute, second |
| Power | Lithium battery 3.6V, size AA |
| Protection class | IP20 |
| Dimensions | 61 x 93 x 32 mm |
| Weight (including batteries) | approx. 120 g |
| Warranty | 3 years |
Tech Specs
Dataloggers / Data Acquisition/Dataloggers for Environmental Variables/Temperature Dataloggers Templ |
|
|---|---|
| Max Temperature | 60 C |
| Min Temperature | -20 C (-4 F) |
| Accuracy | Accuracy ±20 µA |
| LCD Screen | Yes |
| Software Included | Yes |
Test Equipment General Attributes |
|
| Warranty | 3 YEARS |
| IP Rating | IP20 |
| Product Weight | 0.26 LBS |
| Shipping Weight | 0.3 LBS |
| Country of Origin | Czech Republic |
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