Keithley 2110

Section
6: Troubleshooting guide Model 2110 5½ Digit Multimeter
Reference Manual
6-6 2110-901-01 Rev. C/August 2013
Error code Type Description
619 Ohms 1 mA source failed
ST
This test configures to the 1000 V DC range with the internal 10 M
100:1 divider R204 connected across the input. The 1 mA ohms
current source is connected. The co
mpliance limit of the current source
is measured. A 20 ms A DC measurement is performed, and the result
is checked against a limit of 0.12 V ± 0.01 V.
620 AC rms zero failed
ST
This test configures for the 100 mV AC range with the AC input
grounded. The internal residual noise of the AC section is measured
and checked against a limit of -10 mV to 70 mV at the output of the
RMS-to-DC converter.
621 AC rms full scale failed
ST
This test configures for the 100 m V AC range. The 1 mA ohms current
source is switched on to charge the AC input capacitor C614. This
produces a pulse on the output of the RMS-to-DC converter, which is
sampled 100 ms after the current is applied. A 20 ms A/D
measurement is performed and checked against a limit of 2 V to 13 V
into the A DC.
624 Unable to sense line
frequency
EE
ST
The AC line frequency cannot be measured after powering on the
instrument. The instrument will assume 50 Hz line operation for all
future measurements.
640 Meas setting failed
EE
You cannot command to set through the A/D.
641 Meas reading failed
EE
You cannot command to read from A/D.
642 Board Protect failed
EE
The specific IC is malfunctioning or missing. All communication is
blocked.
650 Panel failed
EE
The main board cannot communicate with the front panel.
651 Panel Program Checksum
Error
EE
The checksum from the front panel is incorrect.