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2620A, 2625A
Users Manual
2-14
Note
Any old alarm status/limits, Review array values, or scaling parameters
are automatically cleared whenever you change a channel’s function.
Setting Alarm Limits and Mx+B Scaling Values
Alarm limits and Mx+B scaling values are set in a manner very similar to that used for
the channel function. Begin by pressing either of the following buttons:
A To begin alarm limits settings for this channel.
B To begin scaling value settings for this channel.
The setup sequences are briefly discussed below. Refer to Chapter 3 for more details
about these and other instrument parameters.
Alarm Limits
The menu for setting alarm limits allows you to set up both setpoints (S and T). After
choosing a setpoint, the following settings must be made:
• The alarm sense HI, LO or OFF.
• The limit value (sign and number).
• The decimal point location.
• The value multiplier (m, x1, k, M).
Use G, D, H and J to cycle through the selections at each setting. Then press E
to accept your choice and move on to the next setting.
For example, to set a high limit of +5.35 for alarm S on channel 7, do the following:
1. Select channel 7 by pressing G or D.
2. Press A to begin alarm setting for channel 7. "LIMIT" and S (for alarm limit 1)
now appear in the display. Press EE to accept that you are setting up alarm
limit 1.
3. Use the arrow buttons to select "HI". Then press E.
4. Now use the arrow buttons again to set "+53500". Press H or J to move between
digits. Press G or D to select the value for each digit. (Ignore the decimal point).
Press E to accept these digits.
5. Use the arrow buttons to select the decimal point position ("+5.3500"). Then press
E to accept this position.
6. Next, use the arrow buttons again to select the multiplier ("x1"). Press E to
accept this multiplier and save alarm limit 1.
7. Limit S for channel 7 is now set for a high value of +5.35. Continue pressing E
to step through alarm limit 2 and return to the Inactive Mode. Or, press D to
immediately return to the Inactive Mode.
Pressing D while partway through setting limit S undoes any changes entered thus far
for limit S, returning the instrument to Inactive Mode. Pressing D while partway
through setting limit T cancels entries made thus far for limit T, but does not affect any
changes already made to limit "1".