Hioki PW8001-11 - Page 195

189
Specications of Input, Output, and Measurement
(2) Analog DC input specications (Ch. A, Ch. C, Ch. E, Ch. G)
Measurement range 1 V, 5 V, 10 V
Crest factor 1.5
E󰀨ective input range 1% to 110% of range
Sampling frequency,
sampling bit rate
1 MHz, 16-bit
LPF 1 kHz, o󰀨 (20 kHz)
Response time 0.2 ms (when the LPF is disabled)
Measurement
method
Simultaneous digital sampling, zero-crossing synchronization calculation method
(Between-zero-crossing averaging)
Measurement
accuracy
±
0.03% of reading
±
0.03% of range
E󰀨ects of
temperature
Add the following value within the range of 0
°
C to 20
°
C or 26
°
C to 40
°
C:
±
0.01% of reading per degree centigrade
±
0.01% of range per degree centigrade
E󰀨ects of common-
mode voltage
±
0.01% of range or less
When a voltage of 50 V (DC, 50 Hz/60 Hz) is applied between the input terminals and the
enclosure
E󰀨ects of external
magnetic elds
±
0.1% of range or less
(in a magnetic eld of 400 A/m, DC or 50 Hz/60 Hz)
Display range 0 to
±
150%
Scaling For torque:
±
0.01 to 9999.99
For RPM:
±
0.00001 to 99999.9
Zero adjustment Scaled input o󰀨sets less than or equal to
±
10% of range are zero-corrected.
When the torque meter correction is enabled, input o󰀨sets are zero-corrected after adding
the correction values.
Torque meter
correction
O󰀨/on (selectable by motor)
• Nonlinearity correction
Torque values are corrected using a 11-point (at a maximum) correction table of torque
calibration points (N

m) vs. torque calibration values (N

m).
• Friction correction
Torque values are corrected using an 11-point (at a maximum) correction table of RPM
values (r/min) with consideration of rotation directions vs. torque correction values (N

m).
Each interval between torque calibration values are lineally interpolated.
The unit for the correction table depends on the setting.
Enter a 6-digit correction value.
The sign of torque calculation is used for detecting rotation directions: forward (plus sign)
and backward (minus sing).
Torque calculation
and correction
When disabled: (Torque value) = S
×
[X − (Zero-correction value)]
When enabled: (Torque value) = S
×
[X − (Zero-correction value)] − At − Bt
S: Scaling
X: Input signal-to-torque converted value
At: Nonlinearity correction value
Bt: Friction correction value
Specications
HIOKI PW8001A961-00