Teledyne 7500 - Infrared gas analyzer - operating manual - Manual (Page 54)

54 Model 7500 Instruction Manual
Teledyne Analytical Instruments
4. In the Parameter Setting screen that appears, enter the
numeric values and set the items. Entering the numeric
values or setting the items should be carried out by using the
or key. To move the cursor to the right, press the key.
After setting, press the ENT key, that the parameter setting is
carried out with the value you set.
To close Parameter Setting screen
To close the “Parameter Setting” screen or cancel this mode
midway, press the ESC key. A previous screen will return.
Setting Range
• Response time: 1 to 60 sec. (Initial value: 3 sec)
• Average time: 1 to 59 min or 1 to 4 hours (Initial
value: 1 hour)
When setting the unit of 1 to 59 minutes in terms of minute or 1 to 4 hours with hour
• Maintenance mode: 0000 to 9999 (Initial value: 0000)
Remote Range
A range can be switched via an external input by setting the Remote Range to ON. (The switching action
affects all of instantaneous value, O2 correction value, O2 correction average value and O2 average
value.) If the Remote Range is set to OFF, the external input becomes invalid.
Opening the input gives the High range, or short-circuiting the input gives the Low range.
For the terminal input, refer to 3.4, Wiring.
Switching the range cannot be performed by on-screen operation when the REMOTE RANGE is set to
ON.
Note: In case of 1 range system, this function is overridden.
Output Hold
By setting an output hold to ON, an output signal of each channel are held during the calibration (manual
calibration and auto calibration) and for the gas flow time (refer to 6.4, Setting of Auto Calibration).
Regardless of Hold ON/OFF setting, an output signal can be held via an external input.
(1) Manual calibration