N4L SFRA45 User manual

SFRA45
USER MANUAL
Version2.10 November 2018

“Do not be hasty when making measurements.”
The SFRA455 is a precision instrument that provides you with the
tools to make a wide variety of measurements accurately,
reliably, and efficiently - but good metrology practice must be
observed. Take time to read this manual and familiarise yourself
with the features of the instrument in order to use it most
effectively.

SFRA45 User Manual
i
IMPORTANT SAFETY INSTRUCTIONS
This equipment is designed to comply with BSEN 61010-1
(2010) (Safety requirements for electrical equipment for
measurement, control, and laboratory use) –observe the
following precautions:
Keep the ventilation holes on the underneath and rear
free from obstruction.
Do not operate or store under conditions where
condensation may occur or where conducting debris
may enter the case.
There are no user serviceable parts inside the
instrument –do not attempt to open the instrument,
refer service to the manufacturer or his appointed
agent.
Note: Newtons4th Ltd. shall not be liable for any
consequential damages, losses, costs or expenses
arising from the use or misuse of this product
however caused.

SFRA45 User Manual
ii
DECLARATION OF CONFORMITY
We declare that the product:
Description: Sweep Frequency Response Analyser
Model: SFRA45
Conforms to the EEC Directives:
2014/30/EU relating to electromagnetic compatibility:
EN 61326-1:2013
2014/35/EU relating to Low Voltage Directive:
EN 61010-2-030:2010:
IP Protection of Inputs and Outputs: IP 30 –CEI EN
60529
Operating Temperature: -5⁰to 50⁰C
Storage Temperature: -10⁰to 60⁰C
Relative Humidity Range: 20-90% Non Condensing
Max Altitude: 2,000 Metres
Stuart Chappell
(Director Newtons4th Ltd.)

SFRA45 User Manual
iii
WARRANTY
This product is guaranteed to be free from defects in
materials and workmanship for a period of 36 months from
the date of purchase.
In the unlikely event of any problem within this guarantee
period, first contact Newtons4th Ltd. or your local
representative, to give a description of the problem. Please
have as much relevant information to hand as possible –
particularly the serial number and release numbers (press
SYSTEM then LEFT).
If the problem cannot be resolved directly then you will be
given an RMA number and asked to return the unit. The
unit will be repaired or replaced at the sole discretion of
Newtons4th Ltd.
This guarantee is limited to the cost of the instrument
itself and does not extend to any consequential damage or
losses whatsoever including, but not limited to, any loss of
earnings arising from a failure of the product or software.
In the event of any problem with the instrument outside of
the guarantee period, Newtons4th Ltd. offers a full repair
and re-calibration service –contact your local
representative. It is recommended that the instrument be
re-calibrated annually.

SFRA45 User Manual
iv
ABOUT THIS MANUAL
This manual describes the general features, usage and
specifications of the SFRA45 (Sweep Frequency Response
Analyzer)
Detailed descriptions of the communications command set
for RS232, USB and LAN is given in the separate manual
“SFRA45”communications manual”.
Version 2.1 5th November 2018
This manual is copyright © 2006 - 2018 Newtons4th Ltd.
and all rights are reserved. No part may be copied or
reproduced in any form without prior written consent.

SFRA45 User Manual
v
CONTENTS
1Introduction –general principles of operation ........ 1-1
2SAFETY ............................................................. 2-1
3Getting started .................................................. 3-1
4Quick Start guide ............................................... 4-1
4.1 Operating Mode Keys............................................... 4-1
4.2 Menu Control Keys .................................................. 4-2
4.3 Display Control Keys ............................................... 4-3
4.4 Setup Keys/Keypad ................................................. 4-4
4.5 Control Keys........................................................... 4-5
4.6 Data Entry Guide .................................................... 4-6
4.7 Power Transformer Mode ......................................... 4-6
5Using the menus ................................................ 5-1
5.1 Selection from a list ................................................ 5-3
5.2 Numeric data entry ................................................. 5-4
6Special functions ................................................ 6-1
6.1 Display zoom.......................................................... 6-1
6.2 PROG –non volatile memory store and recall ............. 6-1
6.3 Zero Compensation ................................................. 6-3
6.4 Using Remote Control .............................................. 6-5
6.5 Standard event status register.................................. 6-7
6.6 Serial Poll status byte .............................................. 6-8
6.7 RS232 connections.................................................. 6-9
6.8 RS232 printer ....................................................... 6-10
7System options .................................................. 7-1
7.1 User data ............................................................... 7-2
8Setup / Key Functions......................................... 8-1
8.1 Acquisition Mode (ACQU) ......................................... 8-1
8.2 Sweep Mode / Key (SWEEP) ..................................... 8-3
8.3 Trim mode (TRIM)................................................... 8-6
8.4 Comms Key (COMMS) ............................................. 8-7
8.5 DUT Key ................................................................ 8-7

SFRA45 User Manual
vi
8.6 AUX KEY ................................................................ 8-9
8.7 OUTPUT KEY......................................................... 8-10
8.8 Input Channels ..................................................... 8-11
8.9 System Key Functions ........................................... 8-14
8.10 Prog Key Functions................................................ 8-17
8.11 Storing Results ..................................................... 8-18
8.12 Recalling Results................................................... 8-20
8.13 Deleting Results.................................................... 8-20
8.14 Memory Status ..................................................... 8-22
9Frequency Response Analyzer.............................. 9-1
9.1 (FRA) Screen Display Areas ...................................... 9-5
10 Impedance Mode.............................................. 10-1
10.1 (LCR) Screen Display Areas.................................... 10-2
11 AC RMS Mode .................................................. 11-1
12 Oscilloscope Mode. ........................................... 12-1
13 Technical Specifications .................................... 13-1
14 Appendix A –Text File Format ........................... 13-2
14.1 Example Text File.................................................. 14-2
14.2 Text File Header Format Explanation ....................... 14-3
14.3 Text File Example Sweep Data................................ 14-4
Appendix A –Contact details................................... 14-6

SFRA45 User Manual
vii
APPENDICES
Appendix A Accessories
Appendix B Serial command summary
Appendix C Available character set
Appendix D Configurable parameters
Appendix E Contact details

SFRA45 User Manual
1-1
1Introduction –General principles of operation
The SFRA45 Selective Level Meter is designed to provide a
single instrument solution for multiple applications in the
Power Transformer industry and specifically the Power
Testing Systems environment. Features include:
AC RMS Voltmeter
Signal Generator
Frequency Response Analyzer
LCR Meter-Inductance, Capacitance, Resistance
Measurement
Oscilloscope
The SFRA45 has a wide bandwidth generator output that
can be used as a signal generator for sine, square or
triangular waveforms.
The SFRA45 has two high bandwidth voltage inputs, which
use direct digital analysis at low frequencies and a
heterodyning technique to give high accuracy at high
frequencies. The voltage inputs are simultaneously
sampled and the data is analysed in real time by high
speed DSPs (digital signal processors). A separate CPU
(central processing unit) takes the DSP results for display
and communications. At the heart of the system is an
FPGA (field programmable gate array) that interfaces the
various elements.
The whole operation of the instrument may be controlled
remotely via a serial interface (RS232/USB), or a LAN
Interface. The programmable nature of the instrument
means that new functions can be added as they become
available, or existing functions can be enhanced, by simple
firmware download.
Both the input channels are calibrated digitally so there
are no physical adjustments to be made.