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9780 Clamp Meter Adaptor0 pages
Time Electronics
9780 Clamp Meter Adaptor
• Twin coils fitted as standard
• Ratios 1:1 and 50:1
• Primary current up to 22A
• Simulated current up to 1100A
• AC or DC
• Frequency up to 90Hz
• Max drive voltage 3V
• Low resistance test leads included
DESCRIPTION
A precision adaptor for use with calibrated AC or DC sources and allows accurate calibration of a wide range of clamp
meters. It is built onto a solid quality 20mm thick high insulation base plate, with the twin coils potted into a recess on
the top side of the base, forming a strong bond. The foam protective mat allows accurate positioning of the clamp meter
being calibrated. Three heavy duty terminal posts with removable caps provide connection to the clamp adaptor, the
black centre post is the common connection and the two red posts allow selection of the x1 or x50 turn coils. The quality
low resistance test lead set supplied is made of multi strand (735/0.12mm) oxygen free copper and is terminated with
8AWG gold plated ring and plug terminals.
When used with a high current multifunction calibrator such as the
TE 5025, 5051 or 7051, clamp calibration up to 1100A is possible.
Two coil options are available, firstly a 1:1 coil (x1) i.e. 10A in, 10A out.
Secondly the specially designed 50 turn coil (x50) which gives 1:50 i.e.
10A in, 500A out.
SPECIFICATIONS
0 TO 22 AMPS. TRANSFER RATIO 50 TO 1 OR 1 TO 1
Calibrator
O/P Frequency
Amp Turns
Accuracy (% of O/P)
plus Floor (Amps)
0.2A to 2.2A
DC
10 – 110
0.5
0.05
2.2A to 22A
DC
110 – 1100
0.5
0.15
0.2A to 2.2A
45 – 65 Hz
10 – 110
0.5
0.2
0.2A to 2.2A
65 – 90 Hz
10 – 110
1
0.25
2.2A to 22A
45 – 65 Hz
110 – 1100
0.5
0.7
2.2A to 22A
65 – 90 Hz
110 – 1100
1
0.9
The above specification applies for use with general purpose clamp meters such as the Fluke 801-1000 or LEM LH1020.
Current loops................................................... 2 provided: a 1 to 1 ratio and a 50 to 1 ratio
Maximum allowed primary current.................. 22A RMS. The frequency range is 45 to 90Hz.
Series resistance.............................................. 1 turn coil = approximately 1mΩ
......................................................................... 50 turn coil = approximately 0.11Ω. Inductance = 1mH.
Operation ratings............................................. The 9780 is rated for continuous operation at 10A. At 22A the duty cycle should be a
......................................................................... maximum of 1 minutes on and 2 minutes off.
Maximum drive voltage.................................... 3V DC or 3V RMS AC
Dimensions / Weight........................................ W240 x D280 x H85mm / Weight: 3.9kg
When used with older style clamp meters where substantial operating power is required it should be noted that additional power is required from the
current source. For example a 1000A Ferranti clamp on ammeter requires at least 50% more power from the current source. This will require increased
power transfer through the clamp meter adaptor and therefore the on to off time should be increased to 1 to 10 ie 1 minute on and 10 minutes off.
ORDERING INFORMATION
9780................................................................. Clamp Meter Adaptor
Due to continuous development Time Electronics reserves
the right to change specifications without prior notice.
Time Electronics Ltd, Unit 11 Sovereign Way, Botany Industrial Estate, Tonbridge, Kent, TN9 1RH. United Kingdom.
T: +44 (0) 1732 355993 F: +44 (0) 1732 770312 E: mail@timeelectronics.co.uk
www.timeelectronics.com
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