HP 59501B Operating And Service Manual page 21

NOTE: The dotted tine connections represent jumpers which must be removed. AH other jumpers must be installed
HP POWER SUPPLY
Figure 3-19. CC Programming Connections for HP Power
Supply Models 6453A-6453A, 6464C-6483C
BIPOLAR POWER SUPPLY
Figure 3-20. Positive CC Programming Connections for
BPS/A's 6825A-6827A
3-51 Power Supply CV Programming
3-52 The following paragraphs provide calibration
procedures and a sample program which are applicable to
all supplies listed for CV programming in Table 3-1. Cali¬
brating a supply for CV programming with the 59501B
consists essentially of two adjustments:
1. Setting the supply 's output to 0V when the
59501B is programmed to zero.
2. Setting the supply's output to a desired maxi¬
mum value when the 59501B is programmed
to maximum.
3-53 The maximum desired power supply output can
be set to any value within the rating of the supply. For
example, if only 20V maximum is required for a model
6266B supply (40V rating), the 6266B output range should
be calibrated for 0V to 20V. Since the 59501B is program¬
mable in 999 steps (magnitude digits 000-999), resolution
is 20/999 (about 20mV) in the high range and 2/999 (about
2mV) in the low range. If the supply is calibrated for the
full 40V rating, the resolution is40mV (approx.) even
though the supply would never be programmed above 20V.
3-54 Note that for a 20V full scale output, it is usually
better to calibrate the full scale setting to 99.9% of 20V
or 19.98V. The reason for this is that the resolution will
be 19.98/999 or exactly 20m V per step. However, if it is
imperative to calibrate the output to exactly 20V, the
resolution is 20/999, or 20.02002mV per step. Thus, the
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