standard and Optional Facilities
DC Voltage Ranges
By fitting Option 10, the instrument provides DC Voltage
calibration facilities in eight decade ranges from ±100|iV to
±1000V. 100% overrange is incorporated, except on the
±1000V range (see page 3-3), when the output is limited to
llOOV.
AC Voltage Ranges
By fitting Option 20, the instrument provides AC Voltage
calibration facilities in seven decade ranges from ImV to
1000V. 100% overrange is incorporated, except on the 1000
V
range (see page 3-3), when the output is limited to 1lOOV.
Resolution and Accuracy
The maximum resolution is 7.5 digits with afacility for display-
ing the specified accuracy of any output voltage. The 4708
specifications are shown in Section 6.
Resolution and Accuracy
The maximum resolution is 6.5 digits with afacility for display-
ing the specified accuracy of any output voltage. The 4708
specifications are shown in Section 6.
DC Current Ranges
By fitting Option 30, in conjunction with Option 10, the instru-
ment can be used to calibrate DC Current in five decade ranges
from lOOpA to 1A. The Datron Model 4600 may be used to
extend DC Currents to 11A.
Resolution and Accuracy
The maximum resolution is 6.5 digits with afacility for display-
ing the specified accuracy of output current. The 4708 speci-
fications are shown in Section 6.
AC Current Ranges
By fitting Option 30, in conjunction with Option 20, the
instrument can be used to calibrate AC Current in five decade
ranges from 100|iA to 1A. The Datron Model4600 may be used
to extend AC Currents to 11A.
Resolution and Accuracy
The maximum resolution is 6.5 digits with afacility for display-
ing the specified accuracy of output current. The 4708 speci-
fications are shown in Section 6.
Resistance Resolution and Accuracy
By fitting Option 30, in conjunction with Option 10, the instru- The maximum resolution is 7.5 digits with afacility for display-
ment can be used to calibrate resistance in eight decade ranges ing the specified accuracy of any output resistance. The 4708
from 10 ohm to lOOM ohm. specifications are shown in Section 6.
Frequency
The output frequency of the 4708 extends from lOHz to IMHz
in five overlapping decade ranges, at aresolution of 1% of
nominal Frequency Range. Any five frequency values within
the range of the instrument can be stored in volatile memory.
For higher accuracy, five ‘Spot Calibrated’ frequency values per
Output Range can be recalled from non-volatile memory stor-
age.
Autocal
All Datron AUTOCAL instruments are designed to make the
removal ofthe covers for calibration unnecessary, as full routine
calibration of all ranges and functions can be carried out from
the front panel or over the IEEE 488 bus.
Accidental or unauthorized use of the calibration routine is
prevented by akey operated switch on the instrumentrear panel.
The procedure for calibrating this instrument is contained in
Section 8.
Output Deviation
Auser may deviate the ouq)ut voltage from the output display
value by introducing again ‘Error’ within the general range
±10%. Additionally, for DC functions, the output may be
‘offset’ by up to ±2% of the range in use, or 200|iV, whichever
is greater.
Remote Sense
The specified output voltage may be sensed at the load, using 4-
wire connections. Remote or Local Sense is selectable from the
front panel.
Remote Guard
This facility allows the instrument’s internal guard shields to be
externally connected.
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