AH TTA1 Two-terminal to Three Terminal Adapter
The AH TTA1 test adapter provides the means to connect ARCO SS-32 and GR1409 style two-terminal standard capacitors to a three-terminal bridge or meter. It also accommodates leaded components and other capacitors having banana plugs with standard spacing. The adapter can be used with Andeen-Hagerling Capacitance/Loss Bridges or with other commercial test instrumentation using three- or four-terminal connections. Prior to the introduction of the AH TTA1, the GR1620 capacitance bridge1 provided the only standardized commercial fixture to measure two-terminal standard capacitors.
Connector type to bridge or meter:
Two pairs of BNC jacks. A three-terminal connection uses one of each pair.
Connector type to standard capacitor:
Three 5-way binding post banana jacks with standard spacing (0.75 inch or 19 mm)
Test Cable: The AH TTA1 is compatible with the cables supplied with AH bridges.
Nominal stray High-to-Low capacitance and loss:
Two-terminal mode: 0.18 pF, D < 0.001@1 kHz, Three-terminal mode: 0.17 pF, D < 0.001 @1 kHz
Stray High-to-Low capacitance and loss with banana jacks fully shielded:
Two- and three-terminal mode: < 3 aF, < 0.00002 nS @1 kHz
Nominal High terminal capacitance to ground:
Two-terminal mode: 12 pF @1 kHz, Three-terminal mode: 8 pF @1 kHz
Nominal Low terminal capacitance to ground:
Two- and three-terminal mode: 7 pF @1 kHz
Measurement modes: Two- or three-terminal using a manual switch.
All measurements connect the High and Low terminals of the capacitance bridge to the L and H terminals of the GR1409, respectively. In two-terminal mode, the G terminal of the GR1409 is connected to the High terminal of the bridge. In three-terminal mode, the G terminal of the GR1409 is grounded. For Arco SS-32 standard capacitors, there is little difference between two- and three-terminal modes since these capacitors have only two terminals.
-40° to +75°C while operating or in storage
0 to 85% operating and storage relative humidity, non-condensing.
The adapter is 2.5 inches (6.4 cm) high, 4.0 inches (10.2 cm) wide and 6.5 inches (16.5 cm) long.
1.1 lbs (0.5 kg)
Safety and EMC conformity:
conforms to EN61326:1998 and EN 61010-1: 1993/A2: 1995
The AH TTA1 is covered by a three year warranty. Forward and return shipping is covered during the first three months of the warranty.
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