Fluke 9190A Operator's Manual page 117

Problem
Probes stuck in the well at
low temperatures.
Insert stuck in well.
Password needed.
The Ref Probe shows an
abnormal temperature or
"......".
RTD shows an abnormal
temperature or ".....".
Thermocouple shows an
abnormal temperature or
".....".
mA reading does not read.
The Ref, RTD, TC, or mA
Reading is abnormal or
noisy.
The current REF and UUT
measurement will not
display.
Table 5-2. Troubleshooting Chart (cont.)
Cause: Moisture.
Solution: If the Product has been used at low temperatures for extended
periods of time, moisture could possibly have built up in the well that
formed ice. Set the temperature high enough to melt ice to remove
probes. Set the SETPOINT to +100 °C and let the moisture evaporate out
of the system.
Cause: If maintenance has not been performed on the insert as
described in the Maintenance Section and the insert cleaned periodically,
hard water build-up on the insert may cause it to stick.
Solution: Use the special removal instructions in the "Insert Installation
and Removal Procedure" in Chapter 2.
If this does not remove the insert, contact an Authorized Service Center.
Cause: Password is required to change certain parameters.
Solution: Enter password. The password by default is 1234.
-P Model Only
Solution: Check the Probe type setting in the Reference Probe Setup
menu is correct. Check all associated parameters. Check that the 4 probe
wires are connected and not shorted inside of the connector.
Solution: Check the RTD type setting in the RTD Setup menu is correct.
Check all associated parameters for the current RTD type. Check that the
number of wires setting is correct for the number wires actually used. If
using a 2-wire RTD, make sure that the unused RTD inputs are shorted to
the used RTD inputs as shown in the manual. Using a 3-wire setting on a
4-wire probe can cause errors of 0.01 Ω to 0.1 Ω. Check that the probe
wires are not shorted or open.
Solution: Check the TC type setting in the TC Setup menu is correct for
the TC used. Make sure the TC wires are not loose in the connector or
shorted.
Solution: Check to see if the device under test needs loop power. If it
does, enable Loop Power in the mA Setup menu. Make sure the mA fuse
is good. It is located on the front panel just under the RTD inputs.
Cause: Wrong Calibration Parameters. The problem may be that the
wrong calibration parameters are loaded into the 9190A.
Solution: Check the parameters in the instrument against the parameters
listed on the Report of Calibration for both the REF and UUT.
Electrical Interference. Strong radio frequency radiation from sources
such as radio transmitters, welders, and large electric motors may change
the reading. Move the instrument to another location away from the
source of interference. See "Clamp-on Ferrites" in Chapter 2.
Please contact an Authorized Customer Service Center for further
instructions.
Maintenance and Troubleshooting
Causes and Solutions
5
Troubleshooting
5-7