3B SCIENTIFIC PHYSICS 1017781 Manual De Instrucciones página 5

3B SCIENTIFIC ® PHYSICS
Charge and Discharge Apparatus (230 V, 50/60 Hz) 1017781
Charge and Discharge Apparatus (115 V, 50/60 Hz) 1017780
Instruction manual
01/14 ALF
1. Safety instructions
The charge and discharge apparatus conforms to
safety regulations for measuring instruments,
control systems and laboratory equipment as
specified in DIN EN 61010 part 1. It is designed
for use in dry rooms suitable for operation of
electrical equipment.
Safety of the equipment can be guaranteed as
long as it is used as stipulated. Safety is not,
however, assured if the equipment is not used
properly or is handled carelessly.
If it may be concluded that it is no longer safe to
use the equipment without risk (e.g. if there is
visible damage to it), it should be withdrawn from
use immediately.
•
Only use the equipment in dry rooms.
•
Only use with the plug-in power supply pro-
vided.
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2. Description
The charge and discharge apparatus is designed
for recording points along a charging and dis-
charging curve for three built-in resistor-capacitor
pairings or similar external pairings. It can also be
used to determine the values of the resistors and
capacitors used. The equipment consists of a
voltage comparator, a digital counter for measur-
ing the charging or discharging time and three
internal resistor-capacitor pairs.
The voltage comparator compares the charging
or discharging voltage across the capacitor with a
reference voltage, which can be pre-set to any of
11 levels from 0.5 V to 9.5 V.
Once the function switch is set to START-
CHARGE or DISCHARGE, the digital counter
starts counting until the set reference voltage is
reached, at which point it stops. Prior to this, the
digital counter is set to zero by means of the
RESET button. If it is not reset, the counter works
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Charge/discharge function
switch
Terminals for external resis-
tor
Terminals for external ca-
pacitor
Terminal for plug-in power
supply
Digital counter display
Switch for selecting level of
reference voltage
Selector switch for R/C pair
Reset button for digital
counter