User's Manual

268XA

Service Manual

2-38

Table 2-13. Stallion Switch Settings (cont)

Function

Stallion Settings

S Switches Other Switches

Zero BR1 23 35 37 39 44 64 BR1 ACR4 ACR5 FPWR RPCTL

Zero BR2 23 35 37 39 44 64 BR2 ACR4 ACR5 FPWR RPCTL

Zero BR3 23 35 37 39 44 64 BR3 ACR4 ACR5 FPWR RPCTL

Zero BR4 23 35 37 39 44 64 BR4 ACR4 ACR5 FPWR RPCTL

REFBAL2 26 34 37 39 44 64 BR4 ACR4 FPWR RPCTL

REFBAL0 26 34 37 39 44 64 BR4 ACR4 FPWR RPCTL

REFJUNC 17 21 34 37 39 44 64 BR2 ACR4 FPWR RPCTL

OTC Dischg 17233437424344466465 BR1 ACR4 FPWR RPCTL

After the input channel has been selected and the Stallion chip programmed

appropriately, there is a minimum time required for the signal conditioning circuitry to

settle. This settling time varies depending on the function and range being measured, and

is given in Table 2-14.

Table 2-14. Signal Conditioning Settling Time

Function Time

V dc 30 µs

V ac, fast 100 ms

V ac, medium 150 ms

V ac, slow 200 ms

300 Ω 20 µs

3 kΩ 100 µs

30 kΩ 400 µs

300 kΩ 2 ms

3 MΩ 10 ms

Frequency, fast 100 ms

Frequency, medium 150 ms

Frequency, slow 200 µs

Zero, BR1 30 µs

Zero, BR2 30 µs

Zero, BR3 30 µs

Zero, BR4 30 µs

Reference Balance, both references on 30 µs

Reference Balance, both references off 30 µs

Reference Junction 30 µs