Fluke 9150 13 Troubleshooting

13 Troubleshooting

This sectioncontains information on troubleshooting, CE Comments, and a

wiringdiagram.

In the eventthat the instrument appears to function abnormally, this section

may help to findand solve the problem. Several possible problem conditions

are described along with likelycauses and solutions. If a problem arises, please

read thissection carefully and attempt to understand and solve the problem. If

the problem cannototherwise be solved, contact Hart Scientific Customer Ser-

vicefor assistance(1-801-763-1600). Be sure to have the model number and

serialnumber o f your instrumentavailable.

Problem PossibleCauses and Solutions

Incorrect temperature

reading

Incorrectcalibration parameters. Find the values for CT1, CT2, CT3, CE1, CE2,

andCE3 on the Report of Calibration that was shipped with the instrument (or

fromsubsequent calibrations of the instrument). Reprogram the parameters into

theModel 9150 memory (see Section 8.12, Calibration Parameters). Allow the

instrumentto stabilize and verify the accuracy of the temperature reading.

Memoryscrambled. The memory may be scrambled due to a power surge or

otheraberration. Initialize the system by performing the Factory Reset

Sequence.

FactoryReset Sequence. Hold the SET and EXIT buttons down at the same

timewhile powering up the instrument. After the instrument displays

-init-

,re

leasethe buttons. The display shows

9150

,and then displays the firmware

version.After performing the master reset sequence, all of the configuration pa-

rametersare reset to their default values. Reprogram the calibration parameters

intothe Model 9150 memory (see Section 8.12, Calibration Parameters) and

anyoth era pplicable configuration parameters. Allow the instrument to stabilize

andverify the accuracy of the temperature reading.

Theinstrument heats or

coolstoo quickly or too

slowly

Incorrectscan and scan rate settings. The scan and scan rate settings may be

setto unwanted values. Check the Scan and Scan Rate settings. The scan may

beoff (if the unit seems to be responding too quickly). The scan may be on with

theScan Rate set low (if unit seems to be responding too slowly).

Incorrectheater switch polarity. The PEM and the heater voltage switch may

notbe set for the same voltage. Check both settings and correct as needed.

13 Troubleshooting