Teledyne BDS-3960 operating instructions Installation

Installation BDS 3960

When the contact is OPEN, the analyzer is analyzing, the Remote Cal Inputs are being polled, and a zero or span command can be sent.

When the contact is CLOSED, the analyzer is already calibrating. It will ignore your request to calibrate, and it will not remember that request.

Once a zero or span command is sent, and acknowledged (contact closes), release it. If the command is continued until after the zero or span is complete, the calibration will repeat and the Cal Relay Contact (CRC) will close again.

For example:

1)Test the CRC. When the CRC is open, Send a zero command until the CRC closes (The CRC will quickly close.)

2)When the CRC closes, remove the zero command.

3)When CRC opens again, send a span command until the CRC closes. (The CRC will quickly close.)

4)When the CRC closes, remove the span command.

When CRC opens again, zero and span are done, and the sample is being analyzed.

Note: The Remote Valve connections (described below) provides signals to ensure that the zero and span gas valves will be controlled synchronously.

Range ID Relays: There are four dedicated Range ID relay contacts. The first three ranges are assigned to relays in ascending order—Low range is assigned to Range 1 ID, Medium range is assigned to Range 2 ID, and High range is assigned to Range 3 ID. The fourth range is reserved for the over Range (100 ppm). Table 3-4 lists the pin connections. There is contact opening to indicate what range the analyzer is on. The contacts open when the analyzer is on that range.

Teledyne Analytical Instruments 38