GF Signet 4150 Turbidimeter - Manual (Page 7)

7 Signet 4150 Turbidimeter
Menu Access and Security Feature
If CODE is enabled in the OPTIONS menu, the Access code (Ÿ-Ÿ-Ÿ-ź) must be entered to gain access to CAL or OPTIONS menus.
Signet Turbidimeter
ENTER
5s
ENTER
ENTER
ENTER
ENTER
Signet Turbidimeter
ENTER
2s
ENTER
ENTER
ENTER
ENTER
00 NTU Calibration for
4150-3, 4150-4 Only
2. Press the Ÿ key 2. Press the Ÿ key
3. Press the Ÿ key
3. Press the Ÿ key
4. Press the Ÿ key
4. Press the Ÿ key
5. Press the ź key
5. Press the ź key
6. Press the Ÿ and ź keys to select the NTU standard value
needed.
Alarm relay contacts are held at the last valid condition while the
instrument is in the CALIBRATE or in the OPTIONS menu.
While in the CALIBRATE menu, the instrument has a time-out
feature that automatically returns the system to normal operation
if no keys are pressed for 15 minutes.
CALIBRATE
The 4150 is calibrated and tested prior to leaving the factory, and
is ready to use directly out of the box.
The EPA recommends that on-line turbidity systems be calibrated
at least once every three months if they are used for EPA reporting.
The 4150 is designed to recognize the speci¿ c NTU values of
certifed calibration standards to make periodic recalibration very
safe, quick and simple. The CALIBRATE menu is dedicated to
this method of calibration.
The OFFSET function found in the OPTIONS menu allows a
single-point alignment with an external measurement device.
OFFSET is not a substitute for calibration, but it may be useful if
standard solutions are not readily available.
6. Press the Ÿ and ź keys to select the OPTIONS function that
will be modi¿ ed.
While in the OPTIONS menu, the instrument has a time-out
feature that automatically returns the system to normal operation
if no keys are pressed for 10 minutes.
Access to CALIBRATE Menu Access to OPTIONS Menu
Output Options:
Select the 4 to 20 mA output or the
RS-485 Digital output.
Extended Options:
Display many single-set options like
brightness and decimal location.
(See OPTIONS: EXTENDED, pg. 18.)
Code option:
Turn the Access Code ON or OFF.
Offset option:
Turn the OFFSET option ON or OFF.
Alarm 1 Option:
Turn on the 1st ALARM RELAY.
Alarm 2 Option:
Turn on the 2nd ALARM RELAY.
ALM RELAY
is now LOCKED
ALM RELAY
is now LOCKED
1. Press and hold
the ENTER key
for 2 seconds 1. Press and hold
the ENTER key
for 5 seconds