Cooper Instruments & Systems PTT 260 Digital Pressure Sensor - Manual (Page 17)

CF 197 14 I&M011-10172 Rev A 5/11
displayed as long as press and hold the or keys respectively. When you select this operation,
the message is displayed for one second and selected Peak/Bottom value is displayed.
Peak and bottom values are reset when you reset power to the unit, or by following procedure.
Resetting peak value: While holding the key, press the key.
Resetting bottom value: While holding the key, press the key.
Key Lock
Key operations can be nullified to prevent inadvertent overwriting of setting values. Once the key lock
state is set, the mode cannot be shifted to the one other than the peak hold display mode. The key
lock mode cannot be reset by restoring power. It is reset by the following release operation of a key
lock.
Setting of key lock: In measurement mode press and keys together.
The lock message is displayed for one second indicating that the unit is locked.
Release of key lock: Press and keys together.
The Unlock message is displayed for one second indicating that the unit is unlocked
Backup of Setting Values
The unit has an internal EEPROM and settings and the key lock state are maintained even after the
power is turned OFF. Peak / bottom (max/min.) values will not be maintained.
Maximum/Minimum Pressure Capture
The PTT 260 unit keeps the maximum and minimum pressure level applied to the pressure port as
peak and bottom values respectively, in the internal memory. The peak and bottom values are
displayed while holding the or keys respectively. Message is displayed for one second
and selected Max/Min value is displayed by this operation. Maximum and minimum values are reset
when you reset power to the unit or by the following procedure:
Resetting Maximum value: While holding the key, press the key.
Resetting Minimum value: While holding the key, press the key.
13. ERROR DISPLAY
An error message and pressure value are alternately displayed when one of the following errors
occurs
in the measurement mode (In case of “Out of pressure display range” error, only error
message is displayed). Check the content of error message and take the action below immediately.