MR8740T_Quick guide_eng_20191016H.pdf - 第49页

43 Attaching Connection Cords Current sensor Familiarize yourself with “Operation Precautions” (p. 8) before connecting a current sensor . Refer to the instruction manual that comes with each current sensor for details o…

100%1 / 172
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.
43
Attaching Connection Cords
Current sensor
Familiarize yourself with “Operation Precautions” (p. 8) before connecting a current sensor.
Refer to the instruction manual that comes with each current sensor for details on specications
and directions for use.
CAUTION
Do not connect and remove a current sensor while the instrument remains on.
Doing so will cause damage to the current sensor.
Up to nine sensors can connect to Model 8971 Current Unit and Model U8977 3CH Current Unit all
together.
Connectable current sensors
: Connectable with Model U8977; –: Conversion cable required
Model
number
Model name
Maximum input
current
Frequency
Directly
connectable
Connector*
1
9709
AC/DC Current Sensor 500 A DC to 100 kHz
–*
2
Plastic
9709-05
Metal
9272-05
Clamp on Sensor 20 A / 200 A 1 Hz to 100 kHz
Metal
9272-10 –*
2
Plastic
CT6841
AC/DC Current Probe 20 A DC to 1 MHz
–*
2
Plastic
CT6841-05
Metal
CT6843
AC/DC Current Probe 200 A DC to 500 kHz
–*
2
Plastic
CT6843-05
Metal
CT6844
AC/DC Current Probe 500 A DC to 200 kHz
–*
2
Plastic
CT6844-05
Metal
CT6845
AC/DC Current Probe 500 A DC to 100 kHz
–*
2
Plastic
CT6845-05
Metal
CT6846
AC/DC Current Probe 1000 A DC to 20 kHz
–*
2
Plastic
CT6846-05
Metal
CT6862
AC/DC Current Sensor 50 A DC to 1 MHz
–*
2
Plastic
CT6862-05
Metal
CT6863
AC/DC Current Sensor 200 A DC to 500 kHz
–*
2
Plastic
CT6863-05
Metal
CT6865
AC/DC Current Sensor 1000 A DC to 20 kHz
–*
2
Plastic
CT6865-05
Metal
CT6875 AC/DC Current Sensor 500 A DC to 2 MHz
Metal
CT6876 AC/DC Current Sensor 1000 A DC to 1.5 MHz
Metal
CT6877 AC/DC Current Sensor 2000 A DC to 1 MHz
Metal
*1: Metal connector (ME15W)
Plastic connector (PL23)
*2: The probe/sensor requires Model CT9900 Conversion Cable to connect with Model U8977 3CH Current
Unit.
The probe/sensor requires Model 9318 Conversion Cable to connect with Model 8971 Current Unit.
2
Preparing for Measurement
44
Attaching Connection Cords
Connecting a current sensor with Model U8977 3CH Current Unit
You can directly connect a current sensor with the sub model-number “-05,” which has a metal
connector (ME15W).
Hold the metal
sleeve.
Point the widest key upward.
1
Align the connector guides of the cable with
those of the module connector.
2
Straightly insert the connector until it locks.
Hold the part other than metal to insert the
connector.
The instrument automatically recognizes the
model of the current sensor.
How to disconnect the current sensor
1
Hold and pull the metal collar, which releases
the lock.
2
Pull the connector.
Using Model CT9900 Conversion Cable, you can connect a current sensor without the sub model-
number “-05,” which has a plastic connector (PL23), with Model U8977 3CH Current Unit.
Model CT9900
Conversion Cable
When Model CT9900 Conversion Cable is used, the instrument recognizes Model CT6846 or
CT6865 (1000 A rating) as a 500-A AC/DC sensor. Set the conversion ratio to 2.00.