Supco CR87B series Digital Temperature Recorder

**This Temperature recorder unused in box. Buyer can expect same unit as pictures. See photos for further details

The CR87B is a precision instrument used to monitor and record temperature on a 6” circular paper chart. The CR87B may be carried as a portable instrument or mounted in a fixed location.
The CR87B offers a variety of features to meet any temperature recording requirements. A combination of three temperature ranges and four chart speeds provide a high degree of flexibility. In addition, the chart rotation may be set for single or continuous turn operation as required by a particular application. To protect the data
being recorded the CR87B uses an automatic battery backup to maintain operation during a power outage.

CR87B FEATURES AND CONTROLS

The 3 DIGIT TEMPERATURE DISPLAY: shows temperature of the environment being monitored. When the batteries are nearly discharged, the display will alternate the display reading and “LO” to advise the operator that the batteries are discharged and the CR87B will shortly cease operation.

TEMPERATURE RANGE SELECTOR: allows the user to choose the desired temperature range for measurement and recording.

The CHART SPEED SELECTOR: allows the user to select the time of one full chart revolution. The corresponding chart has to be chosen according to the desired chart speed. Chart part numbers are listed in this manual.

PEN POSITION ADJUSTMENT KNOB: allows the user to adjust the position of the chart pen.

The CHART ADVANCE BUTTON: allows the operator to set the chart to the correct time. Press and hold the chart advance button until the desired time lines up with the Time Pointer (Item 11). The chart is rotated counterclockwise only.

TEMPERATURE ADJUSTMENT: feature allows the user to adjust the reading of the digital display during periodic calibration. The CR87B has been factory calibrated and requires no adjustment to meet all published specifications.

The POWER ON/OFF / CONTINUOUS / SINGLE CHART SELECTOR: allows the user to apply power to the CR87B and to select Continuous or Single Turn for the chart rotation. When power is first applied to the CR87B, the display will show “888” to test each segment of the display, and the pen will move to the edge of the chart. The pen will then move to the correct position on the chart.

RECORDING PEN: contains special ink. The pen has a wrap-around arm latch which makes the pen replacement “A SNAP!” To replace the pen, gently lift up the PEN ARM, (do not over bend pen arm) release the pen latch by pushing it down, and remove the pen

CHART SPINDLE: holds and rotates the chart during the recording operation. DO NOT ROTATE THE SPINDLE BY HAND AS IT MAY DAMAGE THE INTER-NAL MECHANISM.

The PAPER CHART: is 6 inches in diameter. The replacement charts are available from any of Sealed Unit Parts Co., Inc. authorized distributors in a box of 60 charts each. The chart part numbers are listed on the following page

SPECIFICATIONS

Temperature Scale Selectable -40°F to +30°F, -20°F to +50°F,

(Fahrenheit Model) +50°F to +120°F

Temperature Scale Selectable -40°C to 0°C, -30°C to +10°C,

(Celsius Model) +10°C to +50°C

Chart Speed Selectable 6 Hours, 24 Hours, 7 Days, 31 Day

Chart Speed Accuracy +/-1%

Chart Diameter 6 Inches

Temperature Display 3 Digit LED 0.5"

Temperature Accuracy +/-2°F (+/-1°C)

Temperature Sensor Stainless steel tip submersible with 15 ft. of cable

Recording Pen Ink Type

Power Supply 120 VAC, 50/60 Hz., (220/240 VAC, 50 Hz. optional)

Battery Backup 8 Alkaline “AA” cells (Not included)

Battery Life 48 Hours

Operating Ambient

Temperature Range +32°F to +120°F (0°C to +49°C)

Relative Humidity 96% maximum

Dimensions 9 ¼” x 7 ¼” x 2 ¾

Supco Recorder

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