Randell BC-3 Operator's Manual - page 11
11
Calibrating the probes:
1. With the unit on and the unit in idle mode, immerse probes in an ice bath for at least 5 minutes.
2. Press the SEL button to index the LED to illuminate next to the probe to be calibrated.
3. If the display reads 32° F, move on to the next probe (if applicable). If the display does not read 32
° F,
adjustment is required.
4. Press the mode button to place the unit into manual mode. Temperature of the first probe is displayed.
5. Depress and hold the up and down arrows for approximately 3 seconds. The current offset setting is
displayed. The green LED’s will indicate which probe is being adjusted.
6. Use the up and down buttons to appropriately adjust the offset setting necessary for the probe to read
32
° F. (If the probe had displayed 36° F and the offset displayed -02, use the down arrow to change the offset
by 4° F to display -06).
7. Follow the same process for all probes as applicable using the SEL button to toggle through the probes
required.
8. Continue using the SEL button until no LED’s are illuminated in the probe or air temp area, 00 should flash
on the display and all offset adjustments are saved.
9. Return to idle mode and double check that all probes display 32
° F as applicable.
NOTE: This must be done using an ice bath to achieve the most accurate temperature reading.
Additional Programming Information
1. Hysteresis #1 — 2°F — allows for 2 degrees of variance from set point #1.
2. Hysteresis #2 — 4°F — allows for 4 degrees of variance from set point #2.
3. Alarm — 50°F — a visual alarm will appear if the air temperature stays above the alarm setting for longer
than 30 minutes.
4. Printer — yes — select if a printer is or is not installed.
5. Probe calibration at 32°F — put product probes in ice bath to automatically calibrate probes.