Step 5: 100 Ma Source - Dc Current Source Adjustment - Fluke 7526A-156 Calibration Manual

8508A
Figure 12. DC Volts Source Performance Test Connections
Enter 2 on the PC to choose the 1 V source calibration.
The value for the first calibration point (approximately 0 V) will be sourced by the
Product. When the output is stable, type the value shown on the DMM. After the value is
entered, the value for the second calibration point (approximately 1 V) will be sourced by
Product. Type the new value to complete the 1 V source calibration.

Step 5: 100 mA Source - DC Current Source Adjustment

The dc current output adjustment uses similar calibration steps to the voltage source
calibration. The adjustment is done in two parts. The first part sets the zero and span
values. The second part fine adjusts the zero, span and the linearity if necessary. Table 3
for the test equipment used for this procedure. See Figure 13 for connections.
742A
8508A
Figure 13. High and Low Ohms Adjustment Connections
The voltage is measured across a 10 Ω shunt resistor instead of measuring current
directly. Readings from the DMM must be converted to mA (multiplied by 100) before
they can be entered with the PC. Set the DMM to read DC Volts.
Precision Process Calibrator
Calibration Adjustment
7526A
7526A PRECISION PROCESS CALIBRATOR
mA
VOLTS RTD/
100 mA MAX OUTPUT
HI HI
OUTPUT
100 V MAX
LO LO
20V PK
MAX
4 W RTD/
INPUT
HI
CURRENT SENSE
LO
20 V PK
MAX
gxm020.eps
7526A
7526A PRECISION PROCESS CALIBRATO
VOLTS mA RTD/
100 mA MAX OUTPUT
HI HI
OUTPUT
100V MAX
LO LO
20 V PK
MAX
4 W RTD/
INPUT
HI
CURRENT SENSE
LO
20V PK
MAX
gxm023.eps
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