Calibration Procedure - OHAUS HB1AL Manual De Instrucciones

4. Setting time to zero (0:00) and continuous mode: Accumulated time.
a. Press and hold the on/off button to the right of the time display. After three (3)
seconds, the display will indicate the previous set time.
b. Simultaneously press both the up and the down arrows, the display will indicate
zero (0:00). The unit time is now set to zero (0:00) minutes. Alternately, you can
use the up/down arrows to get to zero (0:00).
c. Press the on/off button to the right of the time display, the display will indicate
actual running time. The up/down arrows will become inactive. To stop timer,
press the on/off button again. IMPORTANT: This will not affect the heating
function. Press the on/off button to the right of the heat display to interrupt the
heating function.
d. To reset, press and hold the on/off button to the right of the time display. After
three (3) seconds the display will indicate the previous set time, which was zero
(0:00).
5. Turning unit off:
a. To turn the unit off, press the standby button, the temperature and time displays
will be blank, the standby indicator light will turn on.

CALIBRATION PROCEDURE

This procedure is used to fine tune and calibrate the block temperature at a specific
temperature setting. It will only be active without an external temperature probe
connected. This process may be repeated for up to three (3) separate set-points. If
a fourth calibration set-point is entered, the first set-point entered will be overwritten.
1. Turn unit on.
2. Set desired temperature.
3. Stabilize twenty (20) minutes or more, measuring the block temperature with a
calibrated precision instrument or thermometer.
4. Press and hold standby button, then press the temperature up button once. The
unit will beep two (2) times, confirming calibration mode. The display will now be
flashing.
5. Press the temperature up/down arrows until the display matches the temperature
probe/thermometer.
6. Press standby button to exit calibration mode and return to normal heating.
This process may be repeated at the same set-point multiple times for fine tuning if
desired.
The unit will now use the biased offset for that specific temperature setting and
increase or decrease temperature accordingly to bring the block temperature to set
temperature. The decimal point of the display will flash to indicate a biased offset is
being used. All other temperature settings will use the standard internal calibration. This
offset will be stored in memory and retained until reset.
To restore unit to factory setting:
Press and hold standby button while pressing the temperature down button once. The
reset will be confirmed with two (2) beeps. Press the standby button to exit calibration
mode and return to normal heating.
BEEPER PREFERENCE
To silence beeper operation (except for error codes), with the unit in standby mode,
press and hold the time on/off button and press the standby button. To restore
normal beeper operation, remove AC power to unit for 10 seconds and then restore.
Alternately, you may have to turn the unit on and press and hold the standby button
and press and hold the time on/off button simultaneously.
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