3-8
BIT 4886 051010
19.Set the BOP to maximum positive output current by sending
CAL:CURR MAX
. Measure the
voltage across the sense resistor using a Digital Voltmeter of at least 7 digits in accuracy.
Verify the DVM reads the voltage specified in Table 3-2 for MAIN CURRENT NOMINAL. The
voltage shown on the DVM should be positive; if not, reverse the leads to the DVM.
20.Decrease the voltage across the sense resistor by sending
CAL:DPOT -1
commands until
the voltmeter reads less than the value specified in Table 3-2 for MAIN CURRENT NOMI-
NAL. Then send
CAL:DPOT 1
and verify the voltage is slightly above the specified voltage.
21.Send the command
CAL:DATA -10
to decrease the voltage across the sense resistor until
the voltage is less than the value specified in Table 3-2 for HIGH CURRENT ACCURACY
MAX. Send the command
CAL:DATA 1
to increase the voltage or
CAL:DATA -1
to
decrease the voltage until the DVM reads the voltage specified in Table 3-2 for HIGH CUR-
RENT ACCURACY MAX.
22.Set the BOP to maximum negative output by sending
CAL:CURR MIN
. Continue to measure
the voltage across the sense resistor.
23.If the voltage across the sense resistor is less negative than the value specified in Table 3-2
for HIGH CURRENT ACCURACY MIN, send
CAL:DATA -100
and verify the output is now
more negative. If the value is not more negative than the value found in Table 3-2 for HIGH
CURRENT ACCURACY MIN, send
CAL:DPOT -1
to change the course adjustment and
provide a more negative output.
Send the command
CAL:DATA 10
to increase the voltage across the sense resistor. Con-
tinue to send
CAL:DATA 10
until the voltage is less than the value specified in Table 3-2 for
HIGH CURRENT ACCURACY MIN. Send
CAL:DATA -1
until the DVM reads the voltage
specified in Table 3-2 for HIGH CURRENT ACCURACY MIN.
If the
CAL:DPOT
command was used to adjust the negative output, send
CAL:CURR MAX
to
the unit and repeat step 21 before proceeding to step 24.
24.Set BOP to the maximum current at low range (1/4 Scale) by sending
CAL:LCURR MAX
. Ver-
ify the DVM reads the voltage specified in Table 3-2 for LOW CURRENT NOMINAL.
25.Decrease the voltage across the sense resistor by sending
CAL:DPOT -1
commands until
the voltmeter reads less than the value specified in Table 3-2 for LOW CURRENT NOMI-
NAL. Then send
CAL:DPOT 1
and verify the voltage is slightly above this value.
26.Send the command
CAL:DATA -10
to decrease the voltage across the sense resistor until
the voltage is less than the value specified in Table 3-2 for LOW RANGE ACCURACY MAX.
If necessary, send the command
CAL:DATA 1
to increase the voltage across the sense
resistor or
CAL:DATA -1
to decrease the voltage across the sense resistor until the DVM
reads the voltage specified in Table 3-2 for LOW RANGE ACCURACY MAX.
27.Set the BOP to maximum negative 1/4 scale range output current by sending
CAL:LCURR
MIN
. Continue to measure the voltage across the sense resistor.
28.If the voltage across the sense resistor is less negative than the value specified in Table 3-2
for LOW RANGE ACCURACY MIN, send
CAL:DATA -100
and verify the output is now
more negative. If the value is not more negative, Send
CAL:DPOT -1
to change the course
adjustment and provide a more negative output.
Send the command
CAL:DATA 10
to increase the voltage across the sense resistor. Con-
tinue to send
CAL:DATA 10
until the voltage is less than the value specified in Table 3-2 for
LOW RANGE ACCURACY MIN. Send
CAL:DATA -1
until the reading is within the limits
specified in Table 3-2 for LOW RANGE ACCURACY MIN.
