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Instruction Manual MM850099 ed.02a
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8
OPERATIONS & APPLICATIONS
The
UniCal mA
portable calibrator has been factory calibrated before shipment.
During start-up the operator should only select and load the pertinent application parameters as
described in the following paragraphs.
8.1
Rechargeable batteries
The instrument is powered by four built-in rechargeable batteries.
The instrument is shipped with an average level of charge.
After unpacking, a full charge of the batteries is recommended; connect the instrument to the charger
module ("OFF" condition) for a minimum period of 12 hours .
The Ni-Cd rechargeable batteries do not suffer when used in cyclic operations.
Cyclic operation is understood as a method of operation by which the battery is continually charged and
discharged.
Note that a battery, at its lower limit of charge, risks a non uniform cell polarization: this condition makes
it difficult to recharge with the charger supplied.
Avoid leaving the instrument, with batteries totally or partially discharged, for a long time without
recharging.
To charge the batteries use only the original supplied charging module. The module incorporates
protection and current limiting devices not normally found in other commercial chargers.
8.2
Battery charger. Power supplied from power line ac
The external battery charger is configured, before shipment, for a mains supply of 110-120 V ac or 220-
240 Vac, upon order specification.
The nominal voltage value is indicated on the front label of the charger; if the power supply voltage has
to be modified, correct the indication on the front label.
To replace the power plug loosen the three bottom screws.
To modify the power supply voltage place the jumper, mounted on the circuit board of the charger, as
indicated in figure:
Jumper A
power line at 220-240 V 50/60 Hz
Jumpers B and C
power line at 110-120 V 50/60 Hz
8.3
Power "ON"
ATTENTION : A
LL VALUES IN THE FOLLOWING FIGURES ARE ONLY LISTED AS AN EXAMPLE
.
During set-up and load memory remember that the instructions of the manual related to key operation
have the following meaning:
<A> + <B>
Press the
<A>
key and keeping the pressure on the key, press then the <B> key
<A>, <B>
Press in sequence first the <
A
> key and then the <
B
> key.
"A"
"B"
"C"
