8
- Two types of weights are supplied with the Cahn C-34/C-35: calibration and tare weights. It is
important to keep the two types separated. For more information about weights and the various
classes, refer to the Weights section on page 23.
- The nonmagnetic, stainless steel forceps supplied with the balance have been found preferable
to the common plastic tipped forceps. The Cahn type of forceps are specified by the NIST for
the handling of small sheet metal weights. Plastic forceps are not recommended because they
can hold a static charge which can be transferred to the weight or sample, producing erroneous
readings. Also, do not use metal forceps with serrated tips which can scratch the weights.
- Care should be taken when working in the weighing chamber. The weighing hangdowns are
fragile and if damaged, the balance must be returned to the factory for repair.
- The weighing chamber doors must be closed when zeroing, calibrating or weighing. When the
balance is not in use, the chamber doors should be closed to reduce the possibility of
contamination or damage.
TURNING ON BALANCE
Connect the balance to line power. Turn on the balance with the switch on the rear panel of the
electronics unit. The Weight Display will show +8.8.8.8.8.8 indicating that the balance has been
initialized. In this state, all previous calibration and calibration points have been lost. Also, all
segments of the Display are lit allowing you to check that they are all functioning properly. After
5 to 10 seconds, press TARE to zero the display and set the balance into the operating mode.
WARM UP TIME
For precision weighing, adequate warm-up time is required. Normally, a minimum of one hour of
war- up time is necessary to avoid frequent rezeroing and recalibrating. A minimum of two hours
of warm-up time should be allowed to achieve ultimate precision and stability. We recommend
that the power stay on over night and weekends.
NOTE: A new unit should be allowed 24 hours of “burn in” time before any
precise measurements are attempted.
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