TF1100-EH transit-time handheld flowmeter manual
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3.16 HOW TO PRODUCE AN ALARM SIGNAL
There are 2 types of hardware alarm signals that are available with this instrument. One is the
Buzzer, and the other is the OCT output.
Both for the Buzzer and OCT output the triggering
sources of the event include the
following:
(1)
Alarms on when there is no receiving signal
(2)
Alarms on when there is poor signal received.
(3)
Alarms on when the flow meter is not in normal measurement modes.
(4)
Alarms on reverse flow.
(5)
Alarms on the overflow of the Frequency Output
(6)
Alarms on when the flow is out of a designated range set by the user.
There are two out-of-normal-range alarms in this instrument. They are called #1 Alarm and
#2 Alarm. The flow range can be user-configurable through M73, M74, M75, M76.
For example, assume that the Buzzer should start beeping when the flow rate is less
than
300m
3
/h and greater than 2000m
3
/h, the following steps for setups would be recommended.
(1)
Enter 300 under M73 for #1 alarm low flow rate
(2)
Enter 2000 under M74 for #1 alarm high flow rate
(3)
Select the item reading like ‘6. Alarm #1’ under M77.
3.17 HOW TO USE THE BUILT-IN BUZZER
The built-in buzzer is user-configurable. It can be used as an alarm. Use M77 for setups.
3.18 HOW TO MODIFY THE BUILT-IN CALENDAR
No modification on the built-in calendar will be needed in most cases. The calendar runs on
insignificant amount of power supply. Modification will be required only in such cases as
when the battery is totally consumed, or when the changing of the battery takes a long time.
Press the ENT key under M61 for Modification. Use the dot key to skip over
these digits that
need no modification.
3.19 HOW TO ADJUST THE LCD CONTRAST
Use M70 to the LCD contrast. The adjusted result will be stored in the EEPROM so that the
MASTER ERASE will make no effect on the contrast.
3.20 HOW TO USE THE RS232 SERIAL INTERFACE
Use M62 for the setup of the RS-232C serial interface.
3.21 HOW TO VIEW THE DATE TOTALIZERS
Use M82 to view the date totalizers that are comprised of a daily totalizer, a monthly totalizer
and a yearly totalizer.
