Ametek 3050-DO

PN 305725901, Rev YF
Conguring the 3050-DO Analyzer for Remote Verication
The analyzer can be commanded to initiate a Zero calibration and Verication
remotely via a 4–20 milliamp input into terminals TB-3 1 (+) and TB-3 2 (-) (see
Figure 2-5).
The analyzer response to a current input is described below:
Input Analyzer Response
0–7.9 mA No action, all internal ags reset
8–11.9 mA Abort Zero Calibration or Verication
12–15.9 mA Initiate Verication
16–20 mA Initiate Zero Calibration
A current level should be maintained for a minimum of 2 seconds for the
analyzer to accept the command.
Once a command has been accepted, the current input must drop below
8mA before a subsequent command will be accepted.
For example, with an input level of 4 mA, a remote DCS raises the input to
14mA for 2 seconds. The analyzer will initiate a Verify Cycle. To abort the cycle,
the input must rst be lowered to less than 8 mA for two seconds, then in-
creased to 10 mA for two seconds. Finally the input should again be dropped
to less than 8 mA to reset all internal ags before another remote command is
accepted.
See also “Working From the Verication Tab” in Chapter 3.
2-18 | 3050-DO Moisture Analyzer