The CR4 is a precision, multifunction chart recorder. With the KTH sensor kit, the CR4-KTH becomes a temperature, relative humidity and dew point recorder with a digital display. The recorder was designed with the user in mind. No special knowledge is required to operate the CR4-KTH. The menu driven setup is logically simple and user friendly. All parameters are shown on a two line alphanumeric LCD display. The backlighting of the display enhances visibility under marginal lighting conditions.
The CR4-KTH uses two independent pens and records information on a 6 inch circular chart. Each pen is uniquely colored to maximize chart readability. The rotation of the chart may be set to Single Turn or Continuous.
In addition, a full function alarm feature is provided. The alarm of the CR4-KTH can be set to sound an audible signal when the temperature and/or humidity has exceeded an upper or lower limit. Each limit is individually set from the front panel. A delay time before the alarm is activated may be set by the user to prevent nuisance alarms. Low power normally open relay contacts are provided to allow activation of a remote alarm, phone dialer or annunciator. An optional RS-232 port allows connection to a computer for data logging or monitoring purposes.
Power is supplied through a 120VAC 50/60 Hz. plug-in adapter. External power may be supplied from any 12VDC source such as automotive, marine, or other battery. Battery backup for 48 hours is featured to provide operation during temporary power loss.
All functions of the CR4-KTH are accessed through five pushbuttons located on the front panel. Selectable functions are retained in a memory to avoid reentering settings in the event of a power failure.