Metal Samples MS2500L, Operator'S Manual

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7
III. Operation
A. Cycle Time Predetermination
The following procedure assumes both the mechanical and electrical installation of the instrument. This
procedure also requires that some form of device is available for monitoring the loop (ie., DVM, chart
recorder, etc).
1. Connect the instrument cable to the probe.
2. Set the sample time adjust switches on the MS2500L to 999.
3. Set the operation switches to LPR and TRACK mode.
4. Power up the loop and observe the loop current (using a ammeter, recorder, etc). The
current reading will change every two seconds. These readings will then begin to settle.
Depending upon the conditions, this may take from 30 seconds to 30 minutes. Record this
time interval.
Figure 4. Settle Time
5. Set the sample time adjust switches to this time interval.
6. Set the operation switches to LPR and SAMPLE.
7. Cycle the loop power on and off. (Break Loop)
8. The instrument is now in the run mode and will update the current loop output once every
two sample time intervals.