INSTRUCTIONAL MANUAL
2750L-P/4500L-P/6000L-P
August, 2001
Rev. K
-112-
6.5 OVERLOAD
LAMP
ON
The OVERLOAD lamp comes on when the output load current has exceeded the programmed current limit value. For
all power systems except the 2750L-3P and the 4500L-3P, mis-adjustment of either the Amplifier Gain or Load Balance
will cause the OVERLOAD Lamp to illuminate. If the AC Power System OVERLOAD lamp is on, the following items
may be at fault:
1.
The output is overloaded.
SOLUTION:
Remove the overload.
2.
The programmable current limit level is set too low for the load being driven.
SOLUTION:
Compute and reprogram the correct programmable current limit level.
3.
The programmable current limit is incorrectly calibrated.
SOLUTION:
Perform the calibration in paragraph 4.4.5. page 98.
4.
The adjustment of the Amplifier Gain Balance or Load Balance is incorrect.
SOLUTION:
Perform the adjustments in paragraph 4.4.2 and 4.4.4. page 82.
5.
Incorrect AC Power Source configuration. Check the ELT screen. It should show more than 24 hours
of operation. If it shows less than 24 hours consult the factory.
6.6
CAN'T PROGRAM AC POWER SYSTEM ON GPIB
If the power source does not respond to IEEE-488 GPIB programming, the following items may be at fault:
1.
The power source unit address is wrong.
SOLUTION:
Update address. See paragraph 3.7.1. page 47.
2.
GPIB cable is loose at power source rear panel.
SOLUTION:
Check connection, tighten jack screws.
3.
The oscillator has failed.
SOLUTION:
Replace the oscillator. See Paragraph 6.10. page 113.
6.7 DISTORTED
OUTPUT
The AC Power System output may have a distorted sine wave from the following causes:
1.
The power source output is overloaded.
SOLUTION: Remove the overload or program the current limit to a higher value. Observe power
source capabilities. See Section 1. page 1.
Summary of Contents for 12000L-1P
Page 119: ...INSTRUCTIONAL MANUAL 2750L P 4500L P 6000L P August 2001 Rev K 115 Figure 6 1 MODULE LOCATION...
Page 138: ...INSTRUCTIONAL MANUAL 2750L P 4500L P 6000L P August 2001 Rev K 134 Figure 14 EMERGENCY VOLTAGE...
Page 148: ...INSTRUCTIONAL MANUAL 2750L P 4500L P 6000L P August 2001 Rev K 144 FIGURE 2...
