TF-Recorder

The TF-Recorder allows voltage measurements in low-voltage systems and mains voltage carrying devices up to 1 kV.

Technical Data
The basic device consists of the case, the power supply and the data communications card TFRCPU.

The TF-Recorder can be equipped with max. 6 measuring channels for current or voltage in any desired sequence and number. The 7th slot is adjusted for the phase meter. The data communication with the downstream PC take place over the serial port; three different operating modes are provided, which can be actuated by means of the sliding switch on the front panel of the TFRCPU drawer.

Voltage Measuring Channel

Basic instrument data

Filter type	SC-Butterworth-Filter 10th order
Continuous measurement	Selective measurement of Voltages
Pulse measurement	Selective measurement of voltages
Input resistance	3,8MΩ
Measurment ranges, resolution
Selective	Nominal range	resolution
	20V	10mV
	200V	0.1V
	(max. superimposed 50Hz AC voltage 500V eff.)
	1 000V	1V
	TF without superimposed 50Hz-components
Error limits	+/- 3% v.M. +3 digit
Display	comined display for frequency and measured value
Frequency range	40.0Hz to 1 999.9Hz
Frequency setting	via connected PC
Resolution (step width)	0.1 Hz
Display	8-digit alphanumeric LED-display
Filter bandwidth (-3 dB)	1.7%, 3%, 6.0%
Response times for pulse measurement	1.7% = 400 ms 3,7% = 200 ms 6.0% = 100 ms

Current Measuring Channel

Current measurements
Currents in the range given below can be measured with the current clamps that can be supplied as accessories.

Measuring ranges

Nominal range	Max. total current (50Hz + TF)
20mA	0.01 mA
200mA	0.1 mA
2A	1 mA
20A	10 mA
200A	0.1 A
1000A	1 A

Max. total current

Nominal range	Max. total current (50Hz + TF)
20 mA	1 A
200 mA	10 A
2 A	100 A
20 A	350 A
200 A	350 A
1000 A	1000 A

2 different current clamps types can be supplied as accessories, which cover together the entire range from 0.1 mA to 999 A.

Conversion ratio1.000 A / 1 A
Frequency range40 Hz to 2.000 Hz

Current clamps

M1.MB (CdA 400P replacement)	0.1 mA to 100A
	20 A to 1.000
	+/- 3% v.M. +3 digit + the error limits set by the manufacturer of the current clips in differnt current measurement ranges
Display	combined display for frequency and measured value
Frequency range	40 Hz to 1 999.9 Hz
Frequency setting	via connected PC
Resolution (step width)	0.1 Hz
Display	8-digit alphanumeric LED-display
Filter bandwidth (-3dB)	1,7%, 3.7%, 6.0%
Response times for pulse measurement	1.7% = 400 ms 3.7% = 200 ms 6.0% = 100 ms

Analog Output Filter

The selectively evaluated input signal for oscillographical measurements or for phase measurements with the phase meter - that can be supplied as an accessory - is available at this output.

The output voltage corresponds to the display value, regardless of the selected measurment range (0...100%).
Output voltage	5 Veff at 100% input voltage
Output	short-circuit resistent
Phase error switched	± 3.6° el (with anti-aliasing filter off)
Anti-aliasing frequencies	n * (fC ± f0) (with anti-aliasing filter switched off)
Connection	SMB socket

Phase Meter

Quantity of measring channels	3
Max. input voltage	5Veff
Frequency range	40.0 Hz to 1 999.9 Hz
Display	combined display for frequency und measured value
Measuring range	0° el to 359°el, or 180°el can be selected with the relevant software packet.
Measuring accuracy	± 2°el, in the frequency range 40.0 Hz to 1999.9 Hz for input voltages > 0.25 Veff. This value corresponds to the output voltage of the voltage or current measuring channel with an input voltage or an input current of 5% of the final measurement range.
Referemce channel	The reference channel ist channel B for all inputs. The positive passing of the measurement signal on channel B triggers the measurement.

Option 01

Extension of the measuring channels with an additional input for the tripping of the measurement. Input voltage 12 – 24 V DC via 2 additional front connection sockets.

Storage Battery Supply ASV
The optional storage battery supply makes it possible to use the TF Recorder for up to 6 hours in the full configuration without a mains power supply.

Touchpanel

For the setting of the TF-Recorder without a PC or laptop connection.