MR8740T_Quick guide_eng_20191016H.pdf - 第47页
41 Attaching Connection Cords Strain gauge transducer Connect a strain gauge transducer* 1 to Model U8969 Strain Unit via Model L9769 Conversion Cable* 2 . *1: Hioki does not offer any strain gauge transducers. *2: Model…
40
Attaching Connection Cords
Thermocouple (Temperature)
Connect thermocouples to Model 8967 Temp Unit.
Required items: Thermocouple and at-blade screwdriver (2.6-mm-width blade)
Outer
insulation
Inner insulation
10 mm
Thermocouple
element wires
25 mm
Recommended cable
Compatible wire: Thermocouple element wires with a diameter
of 0.4 mm to 1.2 mm
Standard insulation stripping length: About 10 mm
Strip the insulation of the thermocouple wires as shown on the
left.
How to connect the thermocouple
Model 8967 Temp Unit
Thermocouple
3
1
4
2
1
Depress a button on the terminal block on the
module with the at-blade screwdriver.
2
While depressing the button with the at-blade
screwdriver, insert each thermocouple wire into
the appropriate terminal hole
3
Release the button.
The thermocouple is connected.
4
Attach the thermocouple on a measuring
object.
How to disconnect the thermocouple
While depressing the button, pull the thermocouple wire.
• If noise inuences surrounding equipment, pass the thermocouple element
wires through the center hole of the ferrite clamp-on choke (comes with
Model 8967 Temp Unit) several times successively from the same end.
• If a thermocouple three meters long or longer is connected, the measurement
may be inuenced by the EMC environment that includes external noise.
• For K type and E type thermocouples, the physical phenomenon, short-range ordering can
probably cause incorrect temperature measurement in the range of 250°C to 600°C. Contact a
thermocouple manufacturer to choose proper thermocouples.
41
Attaching Connection Cords
Strain gauge transducer
Connect a strain gauge transducer*
1
to Model U8969 Strain Unit via Model L9769 Conversion
Cable*
2
.
*1: Hioki does not offer any strain gauge transducers.
*2: Model L9769 Conversion Cable is an accessory of Model U8969 Strain Unit.
CAUTION
To prevent damage due to in a break in a conversion cable, do not excessively bend,
pull, or twist the cables and joints between the cables and connectors.
Required items: Strain gauge transducer and Model L9769 Conversion Cable
How to connect the transducer
Model U8969 Strain Unit
Slot of the plug
Indentation of
the connector
1 2
Model L9769 Conversion Cable
1
Align the plug slot of Model L9769
with the outward indentation of Model
U8969, and then insert the plug into the
connector on Model U8969.
2
Insert the plug until it locks.
3
Connect Model L9769 to the strain gauge
transducer.
4
Connect the strain gauge transducer to a
measuring object.
How to disconnect the conversion cable
Gently pull the collar of the plug, which releases
the lock, and disconnect the cable.
2
Preparing for Measurement
42
Attaching Connection Cords
Connector pin-out
Model U8969 Strain Unit
Model L9769 Conversion Cable
(Strain gauge converter)
Applied voltage:
A bridge voltage of 2 V
The metal shell is connected to the GND terminal of
the instrument.
The metal shell is connected to the GND terminal of
the instrument.
Pin mark Description
A BRIDGE+
B INPUT−
C BRIDGE−
D INPUT+
E FLOATING COMMON
F SENSE+
G SENSE−
H N.C.
J N.C.
Pin mark Description
A BRIDGE+, SENSE+
B INPUT−
C BRIDGE−, SENSE−
D INPUT+
E FLOATING COMMON
F N.C.
G N.C.
Model L9769 connection
• Pin F of the conversion cable (module end) is connected to pin A of the conversion cable
(transducer end).
• Pin G of the conversion cable (module end) is connected with pin C of the conversion cable
(transducer end).
IMPORTANT
• A bridge box is required to measure strain using a strain gauge. Use a commercially available
strain gauge and a bridge box.
• Some bridge boxes may be susceptible to noise. In that case, grounding the bridge box allows
the box to be less susceptible to noise. For information on how to ground the bridge box, refer
to the manual of your bridge box or contact its manufacturer.
You can use your Model 8969 Strain Unit with the instrument. The instrument with Model 8969
Strain Unit installed refers to Model 8969 as [U8969] on the display.