For more information about instrument operation and settings, see the
instrument’s instruction manual.
Connect the sensor to the instrument.
Perform zero-adjustment. (DC measurement)
Correct zero output under no-input conditions.
Connect the sensor to the measurement target.
Remove the sensor after measurement is complete.
*1: Derating according to frequency
*2: In an external electromagnetic field of 400 A/m
"Peak input" is only available in conjunction with 3290 or 3290-10.
For more information about the combination accuracy with the instrument, see the instru-
ment’s instruction manual.
Amplitude accuracy design value is DC < f < 5 Hz. Phase accuracy design value is DC < f < 10 Hz.
rdg. : The value currently being measured and indicated on the measuring device.
Hall elements are subject to individual variation, and it is not
possible to specify the magnitude or tendency of that variation.
When using the sensor in an operating environment character-
ized by large temperature variations, it is recommended to as-
sess variation in the zero point under no-input conditions. Zero-
point variation affects DC by not AC mode operation. Reference
examples are provided below to illustrate zero-point variation
(23°C reference) relative to temperature variations for each
sensor. (There is also a significant level of variation in charac-
teristics among individual products.) The clamp sensor operat-
ing temperature range is 0°C to 40°C. (See below for example
characteristics.)
CT9691: Zero-point variation caused by temperature
CT9692: Zero-point variation caused by temperature
CT9693: Zero-point variation caused by temperature
The clamp sensor’s detection circuitry uses Hall elements.
Since Hall elements exhibit temporal drift as well as ambient
temperature-dependent drift, the sensor’s internal circuitry per-
forms temperature correction. Reference examples are provid-
ed below to illustrate sensitivity variation (23°C reference)
relative to temperature for each sensor. (There is also a slight
level of variation in characteristics among individual products.)
Sensor sensitivity variation caused by temperature
Measurement Procedures
• To avoid electric shock, do not touch the portion
beyond the protective barrier during use.
• The maximum rated voltage is 600 V AC/DC.
Attempting to measure voltages exceeding 600 V
with respect to ground could damage the device
and result in personal injury.
• The continuous maximum input range is based on the rise in
temperature that occurs due to self-heating during measure-
ment. Do not input a current in excess of this range. Doing
so may damage the sensor. (The continuous maximum input
range varies with the sensor and the frequency of the mea-
surement current. Refer to the frequency derating character-
istics graph in the “Specifications” section.)
• When removing the output connector, always grip the metal
part of the connector. Pulling on the connector with exces-
sive force may damage the connector.
• When a conductor to be measured is placed in the center of the
clamp core, measurement is performed the most accurately, with no
effect of the conductor position.
• Attach the clamp around only one con-
ductor. Single-phase (2-wire) or three-
phase (3-wire) cables clamped together
will not produce any reading.
• To measure low current levels, multiple
windings may be used to increase relative sensitivity (10 windings
multiplies the measured current by a factor of 10). However, in this
case, the windings should be made radially, with a diameter of at
least 20 cm
• The reading may show a measurement greater than the actual value
due to magnetic-field interference. The amount of interference varies
depending on the sensor. For details, see “External magnetic-field
interference” in Specifications.
1
Wide part on top
1. If the included connector cover is
attached to the clamp sensor’s out-
put connector, slide it up the cable.
2. Gripping the black part of the connec-
tor, insert it into the jack.
Orient the connector so the wide part is
facing up and insert it until you hear it
click into place.
3. Return the connector cover.
When removing the connector, slide the
connector cover toward the cable and
pull on the metal part of the connector.
Remove
Connector cover
2
3
1. Open the clamp sensor, align the
current direction mark with the
direction of the current in the wire,
and close the clamp with the wire
roughly centered in the clamp.
If the phase is not an issue during AC
measurement, the direction of current
flow in the wire relative to the current
direction mark may be ignored.
2. When using the CT9691 sensor, set
the lock lever on the back of the
sensor to the “LOCK” position.
Locking the sensor ensures that it will
not open during measurement. If the
sensor opens even slightly during
measurement, the measured value
will decrease, and the accuracy of the
reading will not be guaranteed.
Power
source
Measured
conductor
Load
CT9691
Power
source
Measured
conductor
Load
CT9692, CT9693
Current
direction
indicator
Current
direction
indicator
4
OK
Specifications
CT9691 sensor
CT9692 sensor
CT9693 sensor
Rated primary cur-
rent
AC/DC100 A
AC/DC200 A
AC/DC2000 A
Output voltage
AC/DC1 V/100 A AC/DC2 V/200 A AC/DC2 V/2000 A
Maximum input range
(RMS value)
100 A continuous
*1
200 A continuous
*1
2000 A continuous
*1
Maximum peak cur-
rent value
150 A
peak
300 A
peak
2840 A
peak
Accuracy guarantee
for temperature and
humidity
23°C ± 5°C (73°F±9°F), 80%RH or less,
no condensation
Guaranteed accu-
racy period
1 year
(Opening and closing of the sensor: 10,000 times)
Frequency band
DC to 10 kHz
(-3dB)
DC to 20 kHz
(-3dB)
DC to 15 kHz
(-3dB)
Effect of conductor
position
Within ±1.0%
at 80 A (55 Hz)
Within ±0.5%
Within ±0.7%
External magnetic-
field interference
0.5 A equivalent
or less
*2
0.7 A equivalent
or less
*2
2.0 A equivalent
or less
*2
Temperature charac-
teristics
0 to 40°C range: 0.1 x accuracy specifications/°C
32°F to 104°F range: 0.18 x accuracy specifications/°F
Operating
temperature and
humidity range
0°C to 40°C (32°F to 104°F), 80% RH or less;
no condensation
Storage temperature
and humidity range
-10°C to 50°C (14°F to 122°F), 80% RH or less;
no condensation
Location for use
Indoor, pollution degree 2,
altitude up to 2000 m (6566 feet)
Maximum rated volt-
age to earth
AC/DC 600 V
Dielectric strength
Model CT9691,CT9692,CT9693:7060 V AC for 1minute
(sensor - case)
Model CT9691: 5400 V AC for 1 minute (sensor - circuit),
Model CT9692, CT9693: 7060 V AC for 1 minute (sensor -
circuit)
Maximum rated power
50 mVA
Measurable conduc-
tor diameter
35 mm (1.38")
or less
33 mm (1.30")
or less
55 mm (2.17")
or less
Dimensions
Approx. 53W x
129H x 18D mm
Approx. 2.09"W x
5.08"H x 0.71"D
Approx. 62W x
167H x 35D mm
Approx. 2.44"W x
6.57"H x 1.38"D
Approx. 62W x
196H x 35D mm
Approx. 2.44"W x
7.72"H x 1.38"D
Mass
Approx. 230 g
(8.1 oz.)
Approx. 410 g
(14.5 oz.)
Approx. 500 g
(17.6 oz.)
Cable length
Approx. 2 m (6.6 feet)
Accessories
Instruction manual (Japanese/ English/ Chinese) x 1
Applicable standards
Safety EN61010, EMC EN61326
Measurement categories III
(Anticipated Transient Overvoltage: 6000 V)
Pollution Degree 2
CT9691 sensor accuracy
Frequency
DC
DC < f
66 (Hz) 66 < f
500 (Hz)
Continu-
ous input
I
80
(A)
±1.0%rdg.
± 0.5 mV
±1.0%rdg.
± 0.5 mV
±2.0%rdg.
± 0.5 mV
80 <
I
100
(A)
±2.5%rdg.
± 0.5 mV
Peak input
|
I
peak
|
110
(A
peak
)
±1.0%rdg.
± 2 mV
±1.0%rdg.
± 2 mV
±2.0%rdg.
± 2 mV
110 < |
I
peak
|
150
(A
peak
)
±2.5%rdg.
± 2 mV
Phase
-
±1.8deg.
Not defined.
CT9692 sensor accuracy
Frequency
DC
DC < f
66 (Hz) 66 < f
1k (Hz)
Continu-
ous input
I
200
(A)
±1.0%rdg.
± 0.5 mV
±1.0%rdg.
± 0.5 mV
±2.0%rdg.
± 0.5 mV
Peak input
|
I
peak
|
300
(A
peak
)
±1.0%rdg.
± 2 mV
±1.0%rdg.
± 2 mV
±2.0%rdg.
± 2 mV
Phase
-
±1.8deg.
Not defined.
CT9693 sensor accuracy
Frequency
DC
45
f
66 (Hz)
DC < f
45,
66 < f
1k (Hz)
Continu-
ous input
I
1800
(A)
±1.5%rdg.
± 0.5 mV
±1.0%rdg.
±0.5 mV
±2.0%rdg.
±0.5 mV
1800 <
I
2000
(A)
±2.0%rdg.
±0.5 mV
Not defined.
Peak input
|
I
peak
|
2300
(A
peak
)
±1.5%rdg.
±2 mV
±1.0%rdg. ± 2
mV
±2.0%rdg.
±2 mV
2300 < |
I
peak
|
2840 (A
peak
)
±6.0%rdg.
±2 mV
±6.0%rdg. ± 2
mV
Not defined.
Phase
-
±1.8deg.
DC < f < 45 Hz:
±1.8deg.
66 < f
1k (Hz):
Not defined.
CT9693 sensor accuracy
Frequency (Hz)
100k
10k
1k
100
10
1
-30
-25
-20
-15
-10
5
0
-5
CT9691 Frequency characteristics
GA
IN
(
d
B
)
Frequency (Hz)
10k
1k
100
10
60
80
100
120
100k
40
20
0
Inpu
t Curre
nt
(A
)
CT9691 Derating according to frequency (continuous)
Frequency (Hz)
100k
10k
1k
100
10
1
-30
-25
-20
-15
-10
5
0
-5
GA
IN
(
d
B)
CT9692 Frequency characteristics
Frequency (Hz)
10k
1k
100
10
100k
50
0
CT9692 Derating according to frequency (continuous)
100
150
200
250
In
put
Cur
rent
(
A
)
Frequency (Hz)
100k
10k
1k
100
10
1
-30
-25
-20
-15
-10
5
0
-5
G
A
IN (
d
B
)
CT9693 Frequency characteristics
Frequency (Hz)
10k
1k
100
10
100k
500
0
CT9693 Derating according to frequency (continuous)
1000
1500
2000
2500
Inpu
t Curre
nt
(A
)
Zero-point Temperature
Characteristics
Temperature Characteristics
of Sensor Sensitivity
-2.0
-1.0
0.0
1.0
2.0
-40 -20
0
20 40 60 80
No.1
No.2
No.3
No.4
No.5
Current (A)
Temperature (°C)
-4.0
-2.0
0.0
2.0
4.0
-40 -20
0
20
40
60
80
No.1
No.2
No.3
No.4
No.5
Current (A)
Temperature (°C)
-4.0
-2.0
0.0
2.0
4.0
-40 -20
0
20
40
60
80
No.1
No.2
No.3
No.4
No.5
Current (A)
Temperature (°C)
-3
-2
-1
0
1
2
3
-50
0
50
100
CT9691
CT9692
CT9693
Deviation (%)
Temperature (°C)
