Hach si792 P series Quick Start Manual

Quick Start Guide
For si792 P series 2-wire transmitters
Additional copies are available on www.hach.com
DANGER: Explosion Hazard. This Quick Start Guide is intended for setup of the si792
transmitter in a non-hazardous location. It is not a substitute for reading and following
the instructions in the user manual. Installation in a hazardous location must be
performed by qualified personnel per the applicable control drawing or ATEX certificate
on the prived documentation CD.
DANGER: Electric Shock Hazard. Disconnect power to all wiring before making
connection to the si792 P series transmitters.
1. Connect the 24 VDC power and communication
Table 1 Terminal assignments
Terminal No. si792(x) P
14 (–)
15 (+)
2. Connect the sensor wires (Table 2).
Table 2 Terminal assignments—differential sensors
Terminal No. Assignment
1 Measure electrode (pHD is Reference)
4 Reference electrode (pHD is Measure)
Cable shield connections (2 shield wires for
5 Hach pHD, 1 shield wire for Hach LCP)
Note: Do not connect to earth ground.
8 RTD (resistive temperature device)
17 –6 V
18 GND
© Hach Company, 2007. All rights reserved. Printed in Germany.
DOC016.53.00794
(Table 1).
si792x P-FF si792x P-PA
(–) (–)
(+) (+)
Hach wire color
red
green
shield
yellow
white
black
For technical assistance or ordering information: visit www.hach.com, call 800-227-4224 or email techhelp@hach.com Edition 1 December 2007
Basic transmitter configuration—si792(x) P (4–20 mA/HART) only
Note: Refer to the manual for si792x P-FF (Foundation Fieldbus) and si792x P-PA (Profibus PA)
configuration instructions.
1. To enter the configuration mode, press
configuration menus:
• output "out.1MNU"
• temperature compensation "tc MNU"
• calibration setup "CAL MNU"
• alarm settings "ALrt MNU"
2. In configuration mode, press the
RIGHT ARROW KEY
Press to access the menu options.
ENTER
3. Use the to edit values. Press
ARROW KEYS
the acceptable range, "Err" will be displayed and the value will not be accepted.
To exit the configuration mode and return to measurement mode, press
Configure the transmitter for ORP sensors
The transmitter has default settings for use with pH sensors. For use with an ORP sensor:
1. Select the "out.1MNU" configuration menu.
2. Change the sensor type from pH to ORP.
a. Press CONF , ENTER . Input passcode
b Use the RIGHT ARROW KEY to change from pH to ORP under the "01.UniT" display code.
Press .
ENTER
c Press , to exit configuration mode.
CONF ENTER
Configure the pH buffer
For accurate pH calibration, configure the correct manufacturer of pH buffers. Calibration is rarely
performed at exactly 25 °C, and different pH buffers can exhibit different temperature dependencies.
3. Press CONF , ENTER . Input passcode
4. Select "CAL MNU".
5. Select the appropriate code from Table
Table 3 Calibration mode setup menu—CAL mnu
Select pH buffer set
–01–BUF
–02–BUF
–03–BUF
–04–BUF
–05–BUF
–06–BUF
–07–BUF
–08–BUF
MAN (manual entry, for buffers not listed in this table)
DAT—Entry of offset and slope of premeasured electrodes
Note:If the buffer is not listed in Table
prompted during calibration.
6. Press . Press ,
ENTER CONF ENTER
CONF , configuration code: 1200 , ENTER
to navigate to a specific configuration menu.
to save the settings. If a value is outside of
ENTER
,
CONF
1200 and press ENTER .
1200 and press ENTER .
3.
Knick/Mettler-Toledo
Merck Titrisols, Riedel Fixanals
Ciba (94)
NIST technical buffers
NIST standard buffers
HACH buffers
WTW technical buffers
Hamilton Duracal
3, select manual entry (MAN). Enter the pH values when
to exit configuration mode.
. There are 4
at any time.
ENTER