Yokogawa Button Operated MV2000 - Manual (Page 86)

3-12 M-4660
Settings
• First-CH, Last-CH
Select the target channels. All of the alarm settings selected here will be applied to
these channels.
• Alarm > 1, 2, 3, 4
Select On for the Alarms that you want to use.
• Alarm > Type
Select the alarm type.
Setting Name Description
H High limit alarm Σ
L Low limit alarm Σ
h Difference high limit alarm You can use this alarm on measurement
channels set to difference computation.
l Difference low limit alarm You can use this alarm on measurement
channels set to difference computation.
R High limit on rate-of-change alarm Σ
r Low limit on rate-of-change alarm Σ
T Delay high limit alarm Σ
t Delay low limit alarm Σ
The alarms for channels set to difference computation can be activated by the values
at the positions indicated below.
Input value
Measured value on the reference channel
H, L, T, t R, r, h, l
Measured value
-
• Alarms > Value
Set the value depending on the type of alarm.
When the Channel Mode Is Volt, TC, RTD, or DI
Type Value Alarm Value Range Example
H, L Within the measurable range. –2.0000 to 2.0000 V for 2 V range
R, r Min: The smallest number expressible, given the
decimal place. Max: The value that is equal to the
width of the measurable range (but cannot exceed
30000 after removing the decimal point) 0.0001 to 3.0000 V for 2 V range
0.1 to 1760.0°C for type R
thermocouples
T, t Same as H and L Same as H and L
When the Channel Mode Is Delta
Type Alarm Value Alarm Value Range Example
H, L Within the measurable range. –2.0000 to 2.0000 V for 2 V range
h, l Within the measurable range. –1760.0 to 1760.0°C for type R
thermocouples
R, r Min: The smallest number expressible, given the
decimal place. Max: The value that is equal to the
width of the measurable range (but cannot exceed
30000 after removing the decimal point) 0.0001 to 3.0000 V for 2 V range
0.1 to 1760.0°C for type R
thermocouples
T, t Same as H and L Same as H and L
When the Channel Mode Is Scale, Sqrt, or 1-5V
Type Alarm Value Alarm Value Range Example
H, L From –5% to 105% of the scale width.
But within the range of –30000 to
30000, ignoring the decimal point. –5.0 to 105.0 for a scale of 0.0 to 100.0.
–120.00 to 300.00 for a scale of –100.00 to
300.00.
R, r Within the range of 1 to 30000,
ignoring the decimal point. 0.1 to 3000.0 for a scale of 0.0 to 100.0.
0.01 to 300.00 for a scale of –100.00 to 300.00.
T, t Same as H and L Same as H and L
3.7 Setting Alarms on Channels