3-12
MST-MHT SERIES 071320
3.9.8
CURRENT (I
O
) FULL SCALE ADJUST (R52)
This procedure adjusts the gain of the current sensing amplifier so that the actual full scale out-
put current matches the programmed output current.
1. Issue commands from the host computer to set the UUT to Current Mode, program output
current (I
O
) to 0.99 x I
MAX
, voltage limit to E
MAX
and disable the output. The unit must be
operating for a minimum of 20 minutes in Current Mode with output disabled to avoid drift
due to temperature fluctuations.
2. Enable the output and verify that CURRENT MODE and OUTPUT ENABLED indicators are
on.
3. Record the output current as measured across the external shunt.
4. Issue commands from host computer to read back current.
5. Compare the read back current (step 4) to the measured current (step 3). Verify that mea-
sured current is equal to readback current within the acceptable range of ± 1 LSB (1/4096) of
I
MAX
. If the acceptable range is exceeded, adjust R52 until measured current is within ±0.5
LSB (1/8192) of read back current, repeating steps 1 through 5 as necessary.
Содержание MST 100-2MHT
Страница 2: ......
Страница 8: ...iv MST SERIES 071320 FIGURE 1 1 MST POWER SUPPLY...
Страница 13: ...MST MHT SERIES 071320 1 5 FIGURE 1 1 MST MHT POWER SUPPLY MECHANICAL OUTLINE DRAWING...
Страница 16: ......
Страница 30: ......
Страница 39: ...MST MHT SERIES 071320 3 9 FIGURE 3 1 CALIBRATION TEST SET UP O2 S2 CS GND S1 O1...
