FLUKE 9102S/725-KIT User Manual for the Fluke 9102S/725-KIT Lo-Temp Dry-Well and Process Calibrator Kit

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Controller Operation

Heater Power

changed. The set-point resistance is used to perform a calibration adjustment using

the Callendar-Van Dusen R versus T curve t (see Section , Calibration Procedure).

The instrument must be at temperature and stable prior to taking the set-point resis-

tance reading. The set-point resistance can be displayed by pressing the “SET” and d

simultaneously. The set-point resistance is displayed as follows.

SrES SrESashesfortwosecondsandthenthewholenumber

ofthecurrentset-pointresistancesettingisdisplayed

99. Wholenumberportionoftheset-pointresistanceashes

fortwosecondsandthenthefractionportionofthecurrent

set-point resistance setting is displayed

.222 Fractionportionofthecurrentset-pointresistancesetting

The set-point resistance is 99.222.

Secondary Menu6.5

Functions which are used less often are accessed within the secondary menu. The

secondary menu is accessed by pressing “SET” and “EXIT” simultaneously and then

releasing. The rst function in the secondary menu is the heater power display. (See

Figure .)

Heater Power6.6

The temperature controller controls the temperature of the well by pulsing the heater

on and off. The total power being applied to the heater is determined by the duty

cycle or the ratio of heater on time to the pulse cycle time. By knowing the amount of

heating, the user can tell if the calibrator is heating up to the set-point, cooling down,

or controlling at a constant temperature. Monitoring the percent heater power, allows

the user to know the stability of the well temperature. With good control stability the

percent heating power should not uctuate more than ±5% within one minute.

The heater power display is accessed in the secondary menu. Press “SET” and “EXIT”

simultaneously and release. The heater power is displayed as a percentage of full

power.

100.0 C Well temperature

S+E

 Accessheaterpowerinsecondarymenu

SEC FlashesSECforsecondarymenuandthendisplaysthe

heaterpower

12.0P Heater power in percent

To exit out of the secondary menu press “EXIT”. To continue on to the proportional

band setting function press “SET”.

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FLUKE 9102S/725-KIT Lo-Temp Dry-Well and Process Calibrator Kit