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Introduction
Thank you for purchasing the HIOKI Model 9021-01 Thermistor
Temperature Probe. To obtain maximum performance from the
device, please read this manual first, and keep it handy for fu-
ture reference.
Inspection
When you receive the device, inspect it carefully to ensure that
no damage occurred during shipping. If damage is evident, or if
it fails to operate according to the specifications, contact your
dealer or Hioki representative.
This 9021-01 Thermistor Temperature Probe is very useful for
various temperature measurements like laboratory tests, air-
conditioning and etc.
This manual contains information and warnings essential for
safe operation of the device and for maintaining it in safe oper-
ating condition. Before using it, be sure to carefully read the fol-
lowing safety precautions.
Safety Symbol
The following symbols in this manual indicate the relative impor-
tance of cautions and warnings.
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
If the device seems to be malfunctioning, confirm that the test
leads are not open circuited before contacting your dealer or
Hioki representative.
9021-01
THERMISTOR
TEMPERATURE PROBE
Instruction Manual
March 2009 Revised edition 4 Printed in Japan
9021A980-04 09-03H
Overview
Safety Information
In the manual, the
symbol indicates particularly
important information that the user should read before
using the device.
Indicates that incorrect operation presents a signif-
icant hazard that could result in serious injury or
death to the user.
Indicates advisory items related to performance or
correct operation of the device.
Operating Precautions
• Before using the device, make sure that the insula-
tion on the probe is undamaged and that no bare
conductors are improperly exposed. Using the
device in such conditions could cause an electric
shock, so contact your dealer or Hioki representa-
tive for repair.
• Do not attempt to measure the temperature of
objects carrying a voltage. Doing so will result in a
short-circuit accident or an electrocution accident.
• In measuring temperatures of less than -10°C or exceeding
50°C, only the metal end portion should be inserted in the
sample. Do not expose the probe housing or test lead to tem-
perature extremes.
• The procedure for adjusting Zero is the same as for ohms
measurements. If the ZERO ADJ switch is accidently moved
during the measurement, adjust Zero over again.
• The response time of the temperature probe varies according
to thermal capacity and specific heat of the sample and other
factors, however, when measuring an air sample with an
extremely small specific heat value, a considerable length of
time will be required to obtain an accurate reading.
Names of Parts
Operating Procedure
1.
Set the multimeter or clamp-on ammeter range selector to
the temperature position.
2.
Connect the mesh plug to either the (+) or (-) terminal of a
multimeter or to one of the
Ω
terminals of a clamp-on am-
meter and connect the black-lead plug to the remaining ter-
minal. Doing this will cause the matter to deflect.
3.
Adjust the 0
Ω
ADJ knob so that the meter reads 0
Ω
.
4.
When adjustment has been completed remove the black-
lead plug, insert the red-lead plug and read the indication on
the TEMP°C scale. This reading should be made only after
the needle has settled.
Specifications
Measuring Range
-50 to 200°C
Maintenance and Service
Pack the device so that it will not sustain damage during ship-
ping, and include a description of existing damage. We do not
take any responsibility for damage incurred during shipping.
Black-lead plug
Mesh plug
Red-lead plug
Memo
