Measurement and instrumentation
Multimeter model UT70A
Réf:
291 034
ENGLISH
19
4.8 Frequency Measurement (10MHz)
1) Insert the red test lead into "V/
Ω
" jack and black test lead into "COM" jack.
2) Set Function/Range Selector to "10MHz".
3) This is an auto-ranged function and the display shall show the tested
frequency value as soon as connect bath ends of the tested signal with test
leads firmly.
4.9 Temperature Measurement (
0
C or
0
F)
1) Insert firmly the black banana plug of included accessory temperature probe
into "mA" jack and red one into "V/
Ω
" jack. If an optional K type flat plug
temperature probe is used, multi-purpose socket shall be completed with.
The socket shall be inserted in right direction into "mA" and "V/
Ω
"
input jacks
and then inserts firmly the temperature probe into the socket with correct
polarity.
2) Set Function/Range Selector to "TEMP °C".
3) Connect temperature probe tip to the location to be tested and Celsius
value of the tested temperature shall be shown on the display instantly.
4) Set Function/Range Selector to "TEMP °F" and the tested reading obtained
shall be in Fahrenheit value.
4.10 Transistor Parameter Measurement (hFE)
1) Set Function/Range Selector to "hFE".
2) Insert the Multi-purpose socket firmly into "mA" and "V/
Ω
" input jacks in right
direction.
3) Properly insert Base (B), Emitter (E) and Collector (C) into corresponding
jacks depending on PNP or NPN type of the transistor and hFE
approximated value of the transistor shall show on the display instantly.
4.11 Diode Measurement « ... »
1) Insert red test lead into "V/
Ω
" jacks and black test lead into "COM" jack.
2) Set Function/Range Selector to « ... » position.
3) Connect the red and black test leads firmly to the positive and negative (or
P and N poles) of a tested diode (or transistor PN node) and the
approximated positive voltage drop value of a tested diode (or transistor PN
node) shall show on display. The positive voltage drop of a good silicone
semiconductor node shall be between 0.5 – 0.8 V.
WARNING:
No voltage signal shall be introduced into measurement.
4.12 Continuity Buzzer Test « ….. »
1) Insert red test lead into "V/
Ω
" jacks and black test lead into "COM" jack.
2) Set Function/Range Selector to « ….. » position.
3) Connect both ends of the tested component or return circuit properly and
firmly with test leads. The built-in buzzer shall sound and « ….. » icon shall
show on display simultaneous when resistance value is less than 70
Ω
WARNING:
Continuity buzzer test cannot be made in live return circuit. Power in live
return circuit shall be cut off and capacitor (large capacitance value in
particular) shall be discharged before test.
