Manual

11
Shouldyouwishtochecktheaccuracyofyourthermometer
atothertemperaturesitismoredifcultwithoutsophisticated
equipment.
Ifyouintendtouseyourthermometertocheckotherequipment
orprocessesaspartofaBS5750/ISO9000procedureorto
checkcompliancewithothercodesofpractice,youmayrequire
eitherUKASorNationalStandardscertication.Comarkcan
offercalibrationtobothstandards.PleasecontactourUKAS
accreditedlaboratoryforfurtherdetails.
11. TAKING A TEMPERATURE MEASUREMENT
Positiontheprobeintheplaceyouwishtotakethe
measurementandrecordareadingwhenthetemperaturehas
stabilised.
Note: Donotexposethermistorprobestotemperaturesoutside
therange–80°Cto+150°Candavoidthermallyshocking
probesbyrapidheatingorcooling.
12. PROBE SELECTION
Penetration Probes
Forproducttemperaturesusethestainlesssteel‘penetration’
probe.Inserttheprobeatleast25mmintotheproductor
preferablytothecentreoftheproduct.Allowsufcienttime
forthereadingtostabilise.Typicallyyouwillneedtowait30
secondsinaliquidandupto2minutesinadrypowder.Try
someexperimentsyourself.
Note:Toavoidcrosscontaminationproperlycleanyourprobe
aftereachmeasurement.
Order: Thermistor - PX22L (White cap),
PX23L (Red cap), PX24L (Green cap) or
PX25L (Blue cap)
Thermocouple - PK24M, PT22M
FIG.1 PX22L PENETRATION PROBE
(MAX. TEMP. +150°C)