PM Special Measuring Systems B. V. (former HITEC)
In the 1970s, PM Special Measuring Systems first announced innovative high-precision current measurement systems based on zero-flux principles. The bipolar zero-flux measurement system realizes the concept of galvanic separation measurement of direct current and alternating current with very high accuracy. Today, thousands of these systems are used in scientific, HVDC, industrial, and medical applications worldwide, and PM-SMS's DCCT (amperometer) has received customer reputation as the best system for current measurement.
The zero-flux system delivers up to 800kHz bandwidth measurements over a measuring range of up to 60kA with excellent linearity characteristics and accuracy, making it ideal for high-end test and measurement equipment.
As a Japanese distributor of PM-SMS, we cover everything from product guidance to after-sales service.
PM-SMS zero-flux basic principles
Standardized product
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- MACC150
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Specifications
Input range 215APK (150ARMS)
Ratio 1000 : 1
DC accuracy 0.005% + 0.002% range
AC accuracy 0.010% + 0.002% range
Bore 17mm
A burden/amplifier for voltage (10V) output is optional
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- MACC2 Plus
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Specifications
Resistive shunt replacement
Up to 600 A bipolar
Current output Ratio 1:1000
-optional Voltage output
Linearity error <4 ppm
A burden/amplifier for voltage (10V) output is optional
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- SC1000 Split core DCCT
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Specifications
Build in electronics for current or voltage output
Up to 1kA bipolar
Voltage output (10V)
Current output (0.5A)
Transfer error <250 ppm
Temperature stability better than 5ppm/K
Custom products
● ～6000A
※Custom products with measuring current values of 6000A or less.
| CURACC | STACC | TOPACC | |
| Rated Input Current (Ipn) |
up to ±6000 A (customer defined) |
up to ±6000 A (customer defined) |
up to ±6000 A (customer defined) |
| Output | Feedback element or current reference | Feedback element or resistive shunt replacement | Voltage output 10V at rated current |
| Output transfer ratio | 1A at Ipn | 10A at Ipn | 10A at Ipn |
| Linearity error (related to actual Ip) |
<2 ppm | <10 ppm | <2.5 ppm |
| Temperature stability | better than 0.05 ppm/K | better than 2 ppm/K | better than 0.5 ppm/K possible |
 PDF download |
PDF download |
PDF download |
CONTROL UNIT
19-inch rack module 
Euro card 
Euro cassette
MEASURING HEAD
Standard bare type 
Casted type 
Side plate type
※CONTROL UNIT and MEASURING HEAD are combined based on the required specification.
● 6000A～
※Custom products with measuring current values of 6000A or more.
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- STACC-HC
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Specifications
Feed-back element or resistive shunt replacement
Up to 60 kA, bipolar
Linearity error <10 ppm
Voltage output (10V at rated current)
Long term stability better than 10 ppm/year
PDF download
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- TOPACC-HC
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Specifications
For calibration or DC standard reference
Up to 30 kA, bipolar
Voltage output (10V at rated current)
Linearity error <2.5 ppm
Temperature stability better than 1 ppm/K
PDF download
● Full custom product
※We can propose the suitable combination or system upon customer requirements.
Please give us an inquiry.
