CR850

Sensors

With several channel types, the CR850 is compatible with nearly every available sensor, including thermocouples, SDI-12 sensors, and 4 to 20 mA sensors. A custom ASIC chip expands its pulse count, control port, and serial communications capabilities. The CR850's I/O ports can be paired as transmit and receive, allowing serial communications with serial sensors and devices.

Measurement & Control Peripherals

The CR850 is compatible with all of our contemporary SDMs, multiplexers, vibrating wire interfaces, terminal input modules, and relays. 

Communications

The CR850 communicates with a PC via direct connect, NL100 Ethernet Interface, multidrop modems, short haul modems, phone modems (land line, digital cellular, and voice-synthesized), RF telemetry, and satellite transmitters (Argos and High Data Rate GOES). Data can be viewed on its onboard keyboard display, CD295 DataView II Display, Archer-PCon Field PC, or a user-supplied PDA (PConnect or PConnectCE software required).

The SC115 is the only compatible external data storage device. The CR850 does not have a peripheral port and is therefore not compatible with the CFM100, NL115, or NL120.

Enclosures

The CR850 and its power supply can be housed in an ENC12/14, ENC14/16, or ENC16/18 enclosure. With the 17565 stack bracket, a CR850 can be attached in a “horizontal” orientation in an ENC10/12 enclosure (i.e., the long axis of the datalogger spanning the short axis of the enclosure).

Power

Any 12-Vdc source can power the CR850 datalogger. Power supplies commonly used with the CR850 are the BPALK, PS100, and PS200. The BPALK provides eight non-rechargeable D-cell alkaline batteries with a 7.5-Ahr rating at 20°C.

Both the PS100 and PS200 consist of a sealed rechargeable 7- Ahr battery and a charging regulator. Their battery should be connected to a charging source (either a wall charger or solar panel). These two power supplies differ in their charging regulator. The PS100 has a standard regulator and the PS200 has a micro-controller-based smart regulator. The PS200's regulator provides two-step constant voltage charging and temperature compensation that optimize battery charging and increases the battery’s life.

Also available are the BP12 and BP24 battery packs, which provide nominal ratings of 12 and 24 Ahrs, respectively. These batteries should be connected to a regulated charging source (e.g., a CH100 or CH200 connected to a unregulated solar panel or wall charger).

Software

CRBasic, the CR850's full programming language, supports simple or complex programming and many onboard data reduction processes. Compatible software includes:

• Short Cut
• PC200W
• PC400 (version 1.4 or higher)
• LoggerNet (version 3.3 or higher)
• RTDAQ
• PConnect (version 3.3 or higher)
• PConnectCE (version 2.2 or higher)
• VisualWeather (version 2 or higher)