GF Signet 4150 Turbidimeter - Manual (Page 6)

6 Signet 4150 Turbidimeter
The Display
All of the elements on the LCD are identi¿ ed here:
The Keypad
Four keys are used to set up, calibrate and operate the 4150.
ENTER
UP, DOWN keys
Scroll through Menu options
RIGHT key
Select item or character to edit
ENTER Key
Access menus
Save changes
If the unit is set up for 4 to 20 mA output in the Options menu and the circuit is open, the lower
NoMA (no mA) display will À ash.
If the unit is set up for 4 to 20 mA output in the Options menu and the circuit is closed, pressing
Ÿwill show the mA current. This display will return to the normal menu after 10 seconds or until
ź is pressed.
The instrument is equipped with a security access code to protect the instrument settings from
inadvertent modi¿ cation.
If the CODE feature is enabled in the OPTIONS menu, the KEY icon is displayed.
If OFFSET is displayed, the 4150 output has been calibrated to match an external reference
measurement.
The ALM1 and ALM2 icons are displayed if the 4150 measurement has exceeded a HIGH or LOW alarm
setpoint.
DRY indicates that the 4150 is in a drying period, following the replacement of the cuvette. The internal
fan will circulate air to clear condensation from the cuvette.
NOTE: DRY is not an alarm condition. During a DRY period the ultrasonic cleaning system is disabled,
but the instrument is still operating.
CAL is displayed when the 4150 is being calibrated.
• The alarm relays are held in their NORMAL condition when CAL is displayed.
• The 4150 will return to normal operation if no keys are pressed in the CAL menu for 15 minutes.
OPTIONS is displayed when the 4150 is being con¿ gured.
• The alarm relays are held in their NORMAL condition when OPTIONS is displayed.
• The 4150 will return to normal operation if no keys are pressed in the OPTIONS menu for 10 minutes.
Display Icons and Functions
NOTE: Pressing Ÿ Ź keys together and holding for 10 seconds resets ALL instrument parameters back to factory defaults.
NOTE: This manual is for 4150 Turbidimeters manufactured after 3/10/2010. If your menus look different than what is shown in this
manual, you have the earlier version. That manual (rev G) is available in the Archived Products section at www.gfsignet.com.
During normal operation, the instrument will have the Units selection displayed on the lower row of the
display and the measured reading on the upper row of the display.
Turbidity Measurement
Security Indicator
Offset Indicator
Alarm Indicators
Calibrate Menu
Options Menu
Drying Period
Units Display
Error Messages