Tenma 72-6851 & 72-6853 Instruction manual
entered press the CONFIRM key and the set current will be updated immediately. To exit without
making any changes press the ESCAPE key. If a mistake is made during entry press the AMPS
key and start again.
The maximum and minimum values accepted will depend on the particular model, see the
specification section for details.
Set OVP
The Over-Voltage Protection (OVP) value is not shown in the main display; however, it is active
and if at any time the actual value of the output voltage exceeds the set value the OVP circuit will
immediately shut down the output, thus avoiding any damage to the circuit under test. The OVP
circuit will protect against adjustments by the user or the GPIB or RS232, external voltages
impressed across the output terminals, or a failure in the circuitry of the instrument itself. If the
OVP circuit trips for any reason the main displays will both show
trip
and the output will be
shut down, i.e. switched off. The system will then attempt to recover from the trip and if
successful the
trip
message will be removed and normal operation will resume.
To set the OVP press the OVP key. The status display will show the set OVP value and the OVP
LED will light. A new value may now be entered from the numeric keypad. The value will be in
VOLTS and the POINT key may be used to enter decimal digits. Once the required value is
entered press the CONFIRM key and the set OVP will be updated immediately. To exit without
making any changes press the ESCAPE key. If a mistake is made during entry press the OVP
key and start again.
The maximum and minimum values accepted will depend on the particular model, see the
specification section for details.
Delta Volts
Delta Volts mode is entered by pressing the
∆
V key. The status display will show the set Delta
Volts value and the
∆
V LED will light. A new value may now be entered from the numeric keypad.
The value will be in Volts and the POINT key may be used to enter decimal digits. Once the
required value is entered press the CONFIRM key and the set Delta Volts value will be updated
immediately. To exit without making any changes press the ESCAPE key. If a mistake is made
during entry press the
∆
V key and start again.
Whilst in Delta Volts mode, i.e. while the
∆
V LED is on, the and keys are active and will
increment or decrement the set volts value by the set
∆
V value shown in the status display. The V
LED next to the knob will also be on indicating that the knob is active for adjusting volts. Turning
the knob will increment or decrement the set volts value in 10mV steps irrespective of the set
∆
V
value.
The maximum value for
∆
V is 1.00V. The minimum value is 0.00V.
Delta Amps
Delta Amps mode is entered by pressing the
∆
l key. The status display will show the set Delta
Amps value and the
∆
l LED will light. A new value may now be entered from the numeric keypad.
The value will be in Amps and the POINT key may be used to enter decimal digits. Once the
required value is entered press the CONFIRM key and the set Delta Amps value will be updated
immediately. To exit without making any changes press the ESCAPE key. If a mistake is made
during entry press the
∆
l key and start again.
Whilst in Delta Amps mode, i.e. while the
∆
l LED is on, the and keys are active and will
increment or decrement the set current value by the set
∆
l value shown in the status display. The
A LED next to the knob will also be on indicating that the knob is active for adjusting current.
Turning the knob will increment or decrement the set current value in 10mA steps irrespective of
the set
∆
l Amps value.
The maximum value for
∆
l is 1.00A. The minimum value is 0.00A.
8
www.tenma.com
electronic components distributor
